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NGN RIIO-GD1 Network Integrity Capital
Sub Appendix A19:C
NGN RIIO GD1 Network Integrity Capital Expenditure
Conten
A19A-1:
1.1
1.2
1.3
A19A-2:
2.1
2.2
2.3
2.4
2.5
2.6
A19A-3:
3.1
3.2
3.3
3.4
3.5
3.6
3.7
A19A-4:
4.1
4.2
4.3
4.4
A19A-5:
5.1
5.2
5.3
5.4
5.5
5.6
A19A-6:
6.1
6.2
6.3
2
nts
Offtake and
Introductio
RIIO-GD1
The Investm
Pre-Heating
Introductio
RIIO-GD1
The Investm
Selection C
Innovation.
Output De
Electrical an
Introductio
Current Pri
RIIO-GD1
The Investm
Selection C
Innovation.
Output De
Pipeline Re-
Introductio
Investment
Selection C
Innovation.
Offtake Mete
The Specif
Investment
Current Pri
Cost Bene
Selection C
Innovation.
Energy Flow
The Specif
Current Ru
Investment
PRI Utilisatio
on .................
Investment R
ment Journey
...................
on .................
Investment R
ment Journey
Criteria .........
....................
liverables .....
d Instrument
on .................
ice Control R
Investment R
ment Journey
Criteria .........
....................
liverables .....
life ...............
on .................
t Driver ........
Criteria .........
....................
er Upgrades
fic Requireme
t Driver ........
ice Control R
efit Analysis ...
Criteria .........
....................
w Measureme
fic Requireme
un Rates ......
t Driver ........
on Capacity U
....................
Requirements
y ..................
....................
....................
Requirements
y ..................
....................
....................
....................
ation (E&I) Si
....................
Run Rates .....
Requirements
y ..................
....................
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....................
....................
Including Low
ent througho
....................
Run Rates .....
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ent ................
ent througho
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Upgrading Pro
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s ...................
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s ...................
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te Upgrades
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s ...................
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....................
w Flow Mete
ut RIIO-GD1
....................
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ut RIIO-GD1
....................
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ogramme ....
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6.4
6.5
6.6
A19A-7:
7.1
7.2
7.3
7.4
7.5
A19A-8:
8.1
8.2
8.3
8.4
8.5
8.6
A19A-9:
9.1
9.2
9.3
9.4
A19A-10
10.1
10.2
10.3
10.4
10.5
A19A-11
11.1
11.2
11.3
A19A-12
12.1
12.2
12.3
12.4
Cost Bene
Selection C
Innovation.
PRI Conditio
The Specif
Justificatio
Selection C
Innovation.
Benefits/O
Odorant Upg
The specifi
Asset Heal
Current Ru
Justificatio
Selection C
Innovation.
High Pressu
The Specif
Justificatio
Cost Bene
Innovation.
0: PIG Trap F
The Specif
Justificatio
Cost Bene
Selection C
Innovation.
1: River Bank
The Specif
Justificatio
Innovation:
2: Compensa
The Specif
Justificatio
Selection C
Innovation.
efit Analysis ...
Criteria .........
....................
on Upgrades
fic Requireme
n for Investm
Criteria .........
....................
utputs .........
grades .........
ic requiremen
lth ................
un Rates ......
n for Investm
Criteria .........
....................
re Storage ...
fic Requireme
n for Investm
efit Analysis ...
....................
acilities ........
fic Requireme
n for Investm
efit Analysis ...
Criteria .........
....................
k Erosion ......
fic Requireme
n for Investm
:...................
ation Paymen
fic Requireme
n for Investm
Criteria .........
....................
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....................
ent througho
ment ..............
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nt throughou
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ment ..............
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ent througho
ment ..............
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ent througho
ment ..............
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....................
ent througho
ment ..............
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ts .................
ent througho
ment ..............
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ut RIIO-GD1
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t RIIO-GD1 ..
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ut RIIO-GD1
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ut RIIO-GD1
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ut RIIO-GD1
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ut RIIO-GD1
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A19A-13
13.1
13.2
13.3
A19A-14
14.1
14.2
14.3
14.4
A19A-15
15.1
15.2
15.3
15.4
15.5
A19A-16
16.1
16.2
16.3
16.4
16.5
A19A-17
17.1
17.2
17.3
A19A-18
18.1
18.2
18.3
18.4
A19A-19
19.1
19.2
19.3
A19A-20
20.1
4
3: Sleeves .....
The Specif
Justificatio
Innovation.
4: LTS Pipelin
The Specif
Justificatio
Selection C
Innovation.
5: Reinforcem
Introductio
RIIO-GD1
The Investm
Network R
Investment
6: Replaceme
Introductio
RIIO-GD1
The Investm
Selection C
Innovation.
7: Aggregated
The Specif
Justificatio
Innovation.
8: Rationalise
The Specif
Justificatio
Selection C
Innovation.
9: Gascoseek
The Specif
Justificatio
Innovation.
0: Over Cross
The Specif
....................
fic Requireme
n for Investm
....................
ne Replaceme
fic Requireme
n for Investm
Criteria .........
....................
ment Mains ...
on .................
Investment R
ment Journey
Risk ...............
t Decision ....
ent Governors
on .................
Investment R
ment Journey
Criteria .........
....................
d (Other Expe
fic Requireme
n for Investm
....................
Mains & Gov
fic Requireme
n for Investm
Criteria .........
....................
kers ..............
fic Requireme
n for Investm
....................
sings ............
fic Requireme
....................
ent througho
ment ..............
....................
ent ...............
ent througho
ment ..............
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Requirements
y ..................
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s ..................
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Requirements
y ..................
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....................
enditure) (Pro
ent througho
ment ..............
....................
vernors to Su
ent througho
ment ..............
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....................
ent througho
ment ..............
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ent througho
....................
ut RIIO-GD1
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ut RIIO-GD1
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s ...................
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s ...................
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ojects <£0.5m
ut RIIO-GD1
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upport Storag
ut RIIO-GD1
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ut RIIO-GD1
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ut RIIO-GD1
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20.2
A19A-21
21.1
21.2
21.3
21.4
A19A-22
22.1
22.2
22.3
A19A-23
23.1
23.2
23.3
23.4
23.5
A19A-24
24.1
24.2
24.3
24.4
24.5
24.6
A19A-25
25.1
25.2
25.3
25.4
25.5
25.6
25.7
A19A-26
26.1
26.2
26.3
26.4
Justificatio
1: Remote Pr
The Specif
Justificatio
Selection C
Innovation.
2: Replace Ne
The Specif
Justificatio
Selection C
3: Buildings/C
Introductio
RIIO-GD1
The Investm
Selection C
Innovation.
4: Gas Treatm
The Specif
Justificatio
Cost Bene
Other Optio
Selection C
Innovation.
5: Site Securit
Introductio
RIIO-GD1
The Investm
Network R
Investment
Selection C
Innovation.
6: Alarm Man
The Specif
Justificatio
Cost Bene
Selection C
n for Investm
essure Monit
fic Requireme
n for Investm
Criteria .........
....................
etwork Logge
fic Requireme
n for Investm
Criteria .........
Civils Rebuild
on .................
Investment R
ment Journey
Criteria .........
....................
ment .............
fic Requireme
n for Investm
efit Analysis ...
ons Conside
Criteria .........
....................
ty Rebuild an
on .................
Investment R
ment Journey
Risk ...............
t Decision: O
Criteria .........
....................
agement .....
fic Requireme
n for Investm
efit Analysis ...
Criteria .........
ment ..............
toring and Co
ent througho
ment ..............
....................
....................
ers ...............
ent througho
ment ..............
....................
and Refurbis
....................
Requirement .
y ..................
....................
....................
....................
ent througho
ment ..............
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red ...............
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nd Refurbishm
....................
Requirement .
y ..................
....................
Option Three ..
....................
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....................
ent througho
ment ..............
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....................
ontrol Proces
ut RIIO-GD1
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ut RIIO-GD1
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shment ........
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ut RIIO-GD1
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ment ............
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ut RIIO-GD1
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26.5
A19A-27
27.1
27.2
27.3
27.4
27.5
A19A-28
28.1
28.2
28.3
28.4
28.5
A19A-29
29.1
29.2
29.3
29.4
29.5
A19A-30
30.1
30.2
30.3
30.4
A19A-31
31.1
31.2
31.3
A19A-32
32.1
32.2
A19A-33
33.1
6
Innovation.
7: Project 12:
The Specif
Justificatio
Cost Bene
Selection C
Innovation.
8: Offtake Ref
The Specif
Justificatio
Cost Bene
Selection C
Innovation.
9: Telemetry &
The Specif
Justificatio
Cost Bene
Selection C
Innovation.
0: C28: Pla
The Specif
Justificatio
Cost Bene
Innovation.
1: Auxiliary Eq
The Specif
Justificatio
Innovation.
2: Land Reme
History ......
Forecast ...
3: Fuel Poor F
Summary ..
....................
Demand Ma
fic Requireme
n for Investm
efit Analysis ...
Criteria .........
....................
form ............
fic Requireme
n for Investm
efit Analysis ...
Criteria .........
....................
& Hilltop Upg
fic Requireme
n for Investm
efit Analysis ...
Criteria .........
....................
ant and Equip
fic Requireme
n for Investm
efit Analysis ...
....................
quipment .....
fic Requireme
n for Investm
....................
ediation Statu
....................
....................
Forecasts .....
....................
....................
anagement ...
ent througho
ment ..............
....................
....................
....................
....................
ent througho
ment ..............
....................
....................
....................
grades ..........
ent througho
ment ..............
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....................
....................
pment ...........
ent througho
ment ..............
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ent througho
ment ..............
....................
utory Liability
....................
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ut RIIO-GD1
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ut RIIO-GD1
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ut RIIO-GD1
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ut RIIO-GD1
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ut RIIO-GD1
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y/Risk Expen
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A19A
1.1 National
into NGN
into the n
impact o
• Th
w
ne
in
ap
• Th
ho
C
di
m
• Th
(s
do
de
The impa
changes
outputs.
1.2 Through
requiring
NGN wil
plan per
£m 20
Pri
Offtake &
Figure 1
Addition
LTS & St
1.3
a) Critic
Offtakes
NGN me
Offtake o
A-1: OfftProg
IntroductTransmissio
N’s high pres
network’s be
on the require
he introductio
which has incr
etwork. Interr
terruptible at
pproximately
he introductio
ow NGN take
ontractual ar
ctate that NG
manner withou
he removal o
torage) which
ownstream s
emands.
acts of UNC
s which impac
RIIO-GD1out GDPC1 t
g intervention
l undertake c
iod is detailed
009/10
ces 1
& PRI
.1: RIIO-GD1 Of
al details of s
torage and 3
The Inves
cality Asse
s and PRIs are
eets 1 in 20 s
or PRI capac
take andgramme
tion n System (NT
ssure pipeline
elow 7Bar pre
ements to inc
on of Unified
reased the pe
ruptible dema
t peak day inc
seven years
on of UNC m
es both flexib
rrangements
GN’s Offtakes
ut altering ag
of NGN’s LP g
h has to be e
system via the
mod 90, UN
ct on RIIO-G
Investmethe network h
. A new PRI
capacity upgr
d in Figure 1.
3/14 14/1
3.5 3.7
fftake and PRI u
sites, financia
3.16a Capacit
stment Jo
ssment
e critical asse
supply obligat
city is typically
d PRI Utile
TS) Offtakes
e network. Pr
essure tiers a
crease the ca
Network Cod
eak day flows
ands were, p
creases peak
normal grow
modification 0
ble capacity (s
with NTS are
s and PRIs h
reed contrac
gasholders w
entered into t
e PRIs. This e
C mod 0195
D1 compare
ent Requhas upgrade
at Tyresal is d
rading work a
.1 below.
5 15/16
3.9
pgrade expendi
al information
ty Utilisation.
ourney
ets; it is funda
tions and com
y determined
lisation
enable gas to
essure Regu
and ultimately
apacity of Offt
de (UNC) mo
s required to
prior to this U
k day deman
wth in peak da
195 AV ‘Offta
storage) and
e embodied in
ave the capa
ctual operatin
which has incr
he system at
equates to ap
5 AV and the
d with GDPC
irementsd 12 PRIs an
due for comp
at seven Offta
16/17
3.4
ture
and capacity
amental that
mplies with th
by any one o
Capacity
o be taken fr
lator Installat
y to customer
takes and PR
odification 90
be entered in
NC change,
d by approxi
ay demands.
ake Reform’
flat capacity
n the Offtake
acity to utilise
g parameters
reased the q
t the Offtakes
pproximately
gasholder de
CR1 in respec
nd four NTS O
pletion in 201
akes and 15
17/18 18/
3.4 4
y assessmen
they have th
his license co
or more of th
y Upgrad
om the Natio
tions (PRIs) e
rs. The follow
RIs:
‘Interruption
nto and utilise
not assessed
mately 10% e
.
in 2012/13 p
through the
e Capacity Pr
e gas supplied
s.
uantity of NT
s and distribu
10 years gro
emolition prog
ct of the capa
Offtakes whic
12. During the
PRIs. The ex
/19 19/20
.1 1.8
nts are record
e required ca
ondition.
he following:
7
ding
onal Grid NTS
nable transpo
wing areas ha
Reform’ in 2
ed through th
d at peak. Su
equating
presents chan
NTS Offtakes
ocedure (OC
d in the most
TS flexible cap
uted into the
owth in peak
gramme are
acity utilisatio
ch were ident
e RIIO-GD1 p
xpenditure ov
20/21
2.8
ded in templa
apacity to ens
S system
ortation
ave an
2011/12,
he NGN
upplying
nges in
s.
CS)
t efficient
pacity
day
the main
on
tified as
period
ver the
Total
26.7
ates 3.2
sure
• Re
• M
• M
• Pi
• O
Outright
could res
of custo
installatio
could op
would in
and PRI
years fro
works pr
b) Heal
The prim
seconda
capacity
condition
has capa
Prism an
of this pl
Pressure
Maximum
percenta
planning
Forecast
reached
period. T
of a tota
Details o
minimum
8
egulator capa
Metered limit;
Meter capacity
ipework veloc
Outlet tempera
failure of eith
sult in a gas
mers being s
ons are desig
perate on two
dicate the un
upgrading an
om project ini
rogramme to
lth Assessm
mary driver for
ary driver. Wh
y requirement
n or has non
acity issues.
nd Graphical
lant over the
e are used to
m Capacity is
age. This data
g models for O
t demand gro
or were antic
This assessm
al population o
of the GF netw
m pressure ou
acity;
y;
cities (Filter in
ature.
her a high cap
supply emerg
supplied and
gned to opera
o streams (tw
nit is non-com
nd the long le
tiation to com
o be deliverab
ment
r this work is
here condition
ts. For examp
serviceable r
Falcon (GF) n
current GDP
determine th
s then compa
a generally o
Offtakes.
owth was con
cipated to re
ment identified
of 192 will re
work analysis
utput at the C
nlet, inlet hea
pacity Offtake
gency where
ensuring the
ate at full cap
winning). In te
mpliant and re
ead time for m
mpletion. Dec
ble.
capacity, wh
n/serviceabili
ple a site whi
regulators wo
network anal
PCR1 and RIIO
he maximum
ared against
btained from
nsidered and
ach in exces
d that seven O
quire interven
s outputs are
Carcroft PRI.
ader, outlet he
e or PRI coul
load sheddin
cessation of
pacity on one
rms of capac
equires upgra
materials and
cisions have t
hilst the being
ty is the prim
ch is showing
ould take prio
ysis modellin
O-GD1 perio
flow capacit
expected ma
m Pk6 data for
d showed tha
s of 90% of t
Offtakes out
ntion during t
e shown in Fig
eader); and
ld impact on
ng may be ne
f gas supplies
e of the two s
city utilisation
ading. Due to
d legal conse
to be taken in
g the conditio
mary driver, co
g restrictions
ority over a si
ng tools have
ods. Fixed pa
ty for each Of
aximum flow
r PRIs and Lo
at the selecte
their capacity
of the total p
the RIIO-GD1
gure 1.2. The
a large numb
ecessary to m
s to custome
streams. With
this may not
o the speciali
ents, projects
n a timely ma
on of the equ
onsideration
s in capacity w
te in good co
been used to
rameters of i
fftake or PRI.
data to give
ocal Transmi
d Offtakes an
y within the R
population of
1.
e screen disp
ber of end us
maximise the
ers is minimis
hout intervent
t affect supp
st nature of O
take three to
anner to enab
uipment is a
is given to ali
which is also
ondition whic
o assess cap
nlet and outle
.
a current util
ssion System
nd PRIs eithe
RIIO-GD1 pric
23 and 15 P
play shows th
sers. This
number
ed. The
tion units
lies but
Offtake
o four
ble a
igning
in poor
ch only
pacities
et
isation
ms (LTS)
er had
ce control
RIs out
e
Figure 1
Details o
issues w
Figure 1
.2: Example of G
of Prism Netw
with high outle
.3: Network ana
Mi
GF network anal
work Analysis
et header velo
alysis outputs – h
in Pressure
ysis outputs.
s outputs are
ocities.
high outlet head
High Outle
Header
Velocity
shown in Fig
er velocities
et
gure 1.3 beloww. The scree
9
en display sho
ows
Details o
populate
Highlight
above or
principle
utilisation
Figure 1
c) Netw
In order
and PRIs
list is am
developm
upgradin
design a
complet
program
manner.
The follo
• PR
co
pr
10
of summary d
ed with analys
ted below are
r approachin
es of investing
n caused by
.4: Summary of
work Risk
to meet NGN
s needs to be
mended annua
ments such a
ng plan. Spec
assessment is
ion. It is esse
mme is contin
owing specific
RI/Offtake up
omplete this w
rogramme ha
data for all PR
sis results for
e the 22 sites
g 90% capac
g in upgrades
investing too
PRI & Offtake A
N’s 1 in 20 pe
e undertaken
ally and in the
as new factor
cific site upgr
s completed.
ential that upg
ually assesse
c risks are de
pgrading wor
work. NGN’s
as been set a
RIs and Offtak
r all PRIs and
s earmarked
city and are t
s and replace
o early but pre
Analysis
eak day supp
n. All PRIs and
e most part r
ries, urban de
rading work i
PRI/Offtake
grading plans
ed so the cap
etailed in the f
rk is highly sp
s proposals h
at a maximum
kes is shown
d Offtakes as
for upgrading
to be targeted
ement of asse
eventing loss
ply obligation
d Offtakes ar
remains unch
evelopments
s established
upgrading w
s are establis
pacity utilisati
following tab
pecialised and
have taken th
m of four sites
in Figure 1.4
part of the n
g. Above the
d for upgradi
ets at the late
s of supply by
s timely capa
re capacity as
hanged. How
and the like
d prior to the
work can take
hed as soon
on outputs c
le:
d there is limi
is into consid
s per annum.
4 below. The
normal LTS p
red line show
ng. This app
est opportun
y leaving the
acity upgradin
ssessed annu
wever, major in
could require
construction
e three/four ye
as possible a
can be deliver
ted availabilit
deration and
.
worksheet is
lanning proce
ws sites that
roach aligns
ity, avoiding u
investment la
ng of NTS Of
ually. The up
nfrastructure
e changes to
year when a
ears from init
and a rolling
red in a timely
ty of resource
the work out
s
ess.
are
to NGNs
under
ate.
fftakes
grading
o the
a detailed
tiation to
y
es to
tput
• M
ha
• Th
de
ap
d) Inve
Do Noth
Succ
requi
Undertak
This i
proce
Undertak
Unde
to c.£
demo
Undertak
This w
90%
as be
Undertak
The p
gash
and t
optio
Measur
Recomme
Asset
Upgrades
RIIO-GD1
Financial
Safety
Security of
Supply
Most of the ma
as built this in
he assessme
etailed design
ppropriate.
estment Op
ing
cessful compl
rement. Ther
ke Optimum
is the preferre
eed.
ke Minimum
ertaking the m
£11.45m. Ho
olition progra
ke Full Upgra
would entail t
capacity. As
eing an over e
ke Minimum
possibility of i
older demolit
the construct
on has been d
re Optio
N
nded
1 in 20
supply
will n
Safety
f
1 in 2
supply
will not
the g
de
progra
not
aterials requi
nto the outpu
ent of the wor
n stage. Histo
ptions
letion of the u
refore the ‘do
Offtake and
ed option co
Offtake and
minimum amo
owever, this o
amme to proc
ading of Iden
the full upgra
ssociated cos
engineered s
Offtake and
installing HP
tion program
tion of one or
discarded on
on One (do
othing)
0
0 Peak Day
y obligations
not be met
is a principle driv
20 License
y obligations
t be met and
gasholder
emolition
amme could
proceed
red to suppo
uts delivery pl
rk involved at
oric costs ha
upgrade work
o nothing’ op
PRI Upgradin
sting c.£27.2
PRI Upgradin
ount of work
option has be
ceed over two
tified Offtake
ade of the Off
sts range from
solution.
PRI Upgradin
Storage Pipe
me was also
r several pipe
both costs a
Option 2
Optimum
Upgrading of
Offtakes and 1
PRI’s
Total investme
c.£27.25m
ver for this inves
is a fundam
Peak Day 1 in
supply obligati
will be met with
the gasholder
operating
ort the constr
lan.
t each locatio
ave been used
k will ensure
tion is not ac
ng Work
25m and will
ng Work
required wou
een discarded
o RIIO period
es and PRIs
ftakes and PR
m c.£27.25m
ng Work and
elines to repla
considered.
elines in the lo
and deliverab
Opt
7
15
Mini
Upgrad
Offtake
PR
ent Total inv
c.£11
stment as the sa
mental Gas Trans
20
on
hout
rs
Peak Da
supply o
would no
witho
gash
ope
uction work h
on can only b
d and NGN b
NGN meets
cceptable.
allow the gas
uld reduce as
d as it would
ds.
RIs which hav
m to c.£40.0m
Construct Sto
ace the lost s
This option w
ocations requ
bility.
tion 3
imum
ding of 7
s and 15
RI’s
Fu
O
vestment
1.45m
To
afe supply of gas
sporters License
ay 1 in 20
obligations
ot be met
out the
olders
rating
P
s
wi
t
havee long le
be accurately
believe this as
the 1 in 20 p
sholder demo
ssociated cos
not enable th
ve been iden
m. This option
orage Pipelin
storage conse
would cost in
uired may not
Option 4 (Full
Upgrading)
ull Upgrading of 7
Offtakes and 15
PRI’s
otal investement
c.£40m
s to end users at
e Obligation.
Peak Day 1 in 20
upply obligation
ill be met withou
the gasholders
operating
11
ead time item
determined
ssessment is
peak day sup
olition progra
sts from c.£2
he gasholder
ntified as exce
n has been di
nes
equential to t
n excess of £
t be possible
Option 5
Upgradi
Pipelin
7
Min upgrad
Offtakes a
PRIs and
several HP
pipelin
t Total invest
above £
t all demand con
0
ut
Peak Day
supply obl
will be met
the gasho
operati
ms. NGN
at
s
ply
amme to
27.25m
r
eeding
iscarded
the
£60.0m
e. This
5 (Min
ng +
es)
ding of 7
and 15
d lay
storage
nes
tment of
£60m
nditions
1 in 20
igation
without
olders
ng.
Measur
Environme
Level of Ri
Comments
Decision
Figure 1.5:
The chos
day supp
of the sit
Undertak
following
Undertak
Offtakes:
Undertak
Reductio
Undertak
Undertak
Figure 1
*The typ
works re
site rebu
upgradin
e) Sele
Network
necessa
12
re Optio
N
ental
Environ
would b
in resp
from H
PRIs/
addit
issues w
sk
Very
inc
throug
s
Not rec
– una
lev
: Investment Op
sen solution
ply conditions
te locations, s
ke Major * (see n
Offtakes:
ke Intermediate u
:
ke Major upgrad
on Installations (P
ke intermediate u
ke minor upgrad
.6: Site locations
e of upgradin
equired for m
uilding pipewo
ng work wou
ection Criter
k analysis tec
ary capacity to
on One (do
othing)
nmental risks
be significant
pect of noise
High flows at
/Offtakes in
tional to all
with holders.
y high and
creasing
ghout RIIO-
GD1
commended
acceptable
el of risk
N/A
ptions
is to underta
s are met and
scale of upgr
Details of the
note below) upgr
upgrading work
ing work at the f
PRI’s):
upgrading work
ding work at:
s, Upgrade Req
ng work is cla
inor work e.g
ork building h
ld fall somew
ria and Inn
hniques are u
o meet NGN
Option 2
Environmenta
risks presented
the gasholder
would be
removed.
Upgraded uni
would be desig
for min
environmenta
impact.
Acceptable ris
retained by
network
Acceptable
solution where
network retains
managable leve
risk
1
ke the optim
d enable the
rading work a
site locations, sc
rading work at th
of the following
following Pressu
at the following
quirements and C
assified as m
g. regulators
heating contr
where in betw
novation
used to deter
’s supply obl
Opt
al
d by
rs
ts
ned
al
Enviro
risks w
signifi
respect
with h
sk High risk
by ne
the
s a
el of
Unacce
the netw
gashold
not be
um level of u
gasholder de
and cost asse
cale of upgradin
he Wethe
Asselb
Melkin
ure Bullert
Chopw
PRI’s: Canal
Keigh
Whitb
Cost Assessmen
inor, major a
only may req
rols regulators
ween major an
rmine the abi
igations. This
tion 3
nmental
would be
icant in
all issues
holders.
ris
t
U
wo
k retained
etwork
eptable to
work as the
ers could
removed
A
ne
t
4
pgrading wo
emolition pro
essments are
ng work and cos
eral and Pickerin
by, Baldersby, B
nthorpe.
thorpe Lane, Ea
well, Leadgate a
Road, Carcroft
ley, Menston an
by (Guisborough
nt
and intermedi
quire changin
s and other e
nd minor wor
ility of the PR
s working list
Option 4 (Full
Upgrading)
Environmental
sks presented by
the gasholders
would be
removed.
Upgraded units
ould be designed
for min
environmental
impact.
Minimal risk
retained by
network
cceptable to the
etwork but not to
he customer as
this is an over
engineered
solution
2
orks which wi
ogramme to b
e shown in Fi
st assessments
ng.
Burley Bank Little
ast Bierley, Ward
and Meadow La
, Clay Flatts Sto
nd Penrith.
Road)
ate. This is b
g. Major wor
equipment. In
rks.
RIs and Offtak
is updated a
Option 5
Upgradi
Pipelin
y
d
Environm
risks prese
the gasho
would
removed.
would b
increas
environmen
by constr
pipelin
Minimal
retained
netwo
e
o
Acceptable
network bu
the custom
this is an
enginee
solutio
3
ll enable 1 in
be completed
igure 1.6 belo
e Burdon and
den Law, Whiteh
ne.
rage, Clay Flatts
based on the
rks would req
ntermediate
kes to provide
annually. The
5 (Min
ng +
es)
mental
nted by
olders
be
There
be an
sed
ntal risk
ucting
nes
risk
d by
ork
e to the
ut not to
mer as
n over
ered
on
20 peak
d. Details
ow.
hall Road,
s,
scale of
quire full
e the
scale of
the upgr
year.
Conside
‘turbo ex
preheatin
f) Outp
Capacity
the start
The focu
and utilis
and end
takes int
plan.
4
No. of
4
No. of le
3
4
No. of level a
rading work is
ration will be
xpanders’ or
ng costs.
put Delivera
y utilisation m
middle and e
us in RIIO-GD
sation. The ch
point of the
to considerat
54
5529
40
13
sites operating at eaclevel as at 1/4
51
5230
44
15
sites operating at eacevel as at 31/3/2021 w
interventi
53
5335
43
8
sites operating at eachas at 31/3/2017 with ne
s determined
given to all in
‘wind turbine
ables
measures – th
end of the RI
D1 will be imp
harts below s
plan period w
ion the dema
h capacity utilisation 4/2013
</= 50%
>50% to </=7
>70% to </=8
>80% to </=1
>100%
h capacity utilisation without network on
</= 50%
>50% to </=7
>70% to </=8
>80% to </=1
>100%
h capacity utilisation etwork intervention
</= 50%
>50% to </=7
>70% to </=8
>80% to </=1
>100%
d by detailed
nnovative op
es’ to genera
he following c
II0-GD1 witho
proving asset
show the cap
with the deta
and and grow
70%
80%
100%
4
No. oflevel a
70%
80%
100%
70%
80%
100%
No. of level a
design work
tions at the d
ate electricity
charts detail h
out undertak
t health and t
pacity utilisati
iled upgradin
wth forecasts
53
5328
43
15
f sites operating at eacs at 31/3/17 without n
51
5245
440
sites operating at eachas at 31/3/2021 with ne
which is und
detailed desig
and ‘ground
how the Offta
ing any work
o have full co
on at 31/03/
ng works und
s as laid out in
h capacity utilisation network intervention
</= 50%
>50% to </=7
>70% to </=8
>80% to </=1
>100%
h capacity utilisation etwork intervention
</= 50%
>50% to </=7
>70% to </=8
>80% to </=1
>100%
dertaken prior
gn stage for e
source heat
akes and PRIs
k.
ompliance in
/2017 and 31
dertaken. The
n the main bo
70%
80%
100%
70%
80%
100%
13
r to the cons
example insta
pumps’ to re
s are being u
terms of cap
/03/2021 at
e capacity util
ody of the bu
truction
alling
educe
utilised at
pacity
the mid
lisation
usiness
A19A
2.1 Within th
are used
heating o
when the
A large n
deteriora
NGN hav
however
safe leve
and envi
package
performa
addition
life and r
Through
asset ou
six sites
WBHs w
at Panna
heating a
2.2 Within th
upgrade
pre-heat
7Bar PR
This tran
£m
(2009/10
Pre-Heat
Expendit
Figure 2
14
A-2: Pre-
Introducthe NGN netw
d for pre-heat
on gas press
e pressure is
number of pre
ation causing
ve made eve
r we have now
el. WBH are f
ironmental pe
e boiler and h
ance and effic
to the WBHs
require upgra
out GDPCR1
ut in IGEM/ IG
(Penrith, Halt
with a boiler p
al. Over the c
assets to ens
RIIO-GD1he RIIO-GD1
e/replace 26 b
ting investme
RIs’.
nslates to the
0 prices)
ting
ture
.1: RIIO-GD1 Pr
-Heating
tion work we curre
ting gas as d
sure reduction
reduced (the
e-heating pla
g condition an
ery effort to m
w exhausted
fairly crude in
erformance. R
heat exchang
ciency saving
s several of th
ading/replacin
1 the network
GE/TD/13. Th
twistle, Dalst
package on S
current price c
sure the netw
Investmeperiod NGN
boiler packag
ent is driven d
investment p
13/14 1
2.1
re Heating Expe
g
ently have 10
efined under
n stations is r
e Joules-Tho
ant on gas sit
nd reliability is
maintain these
all our spare
design with
Replacement
er, rather tha
gs, utilising m
he networks
ng.
k has focused
his has gener
on, Keswick,
Scremeston a
control NGN
work has optim
ent Requproposes to
ges (65%), an
directly by As
profile identifi
14/15 15/1
2.1 2.4
nditure
8 Waterbath
the requirem
required to m
ompson effec
tes are now a
ssues and lac
e assets by u
e parts stock
no provision
t of these WB
an a like for lik
modern burne
boiler packag
d on upgradi
ally involved
, Eltringham,
as part of a to
has a adopt
mised its use
irementsreplace 32 W
nd install thre
sset Health ca
ied below:
6 16/17
3.1
Heaters (WB
ments of the I
mitigate the ef
t).
approaching t
ck of spare p
sing spares f
and are una
to suit the m
BH units will n
ke replaceme
er manageme
ges have also
ng all its sites
the installatio
Gretham). N
otal site rebui
ed a strategy
e.
WBHs (30%)
ee new boiler
ategory 17 ’O
17/18 18
3.0 2
BH) and 40 b
GEM standa
ffects of gas
the end of th
parts driven b
from redunda
ble to repair t
modern requir
normally be b
ent. This will g
ent systems a
o reached the
s in line with
on of new pre
GN have also
ld and added
y of ‘sweating
of the popula
packages on
Offtakes’ and
8/19 19/20
2.9 2.3
oiler package
rd IGE/TD/13
temperature
heir useful life
y obsolescen
ant equipmen
to a satisfact
rements of ef
by the use of
give better
and controls.
e end of their
the requirem
e-heating sys
o replaced tw
d a single new
g’ the current
ation,
n existing site
category 18
20/21
2.0
es which
3. Pre-
loss
due to
nce.
nt,
tory and
fficiency
a
In
r useful
ment
stems on
wo
w WBH
t pre-
es. All the
‘above
Total
RIIO-GD1
20.1
2.3
a) Critic
Pre-heat
be signif
of these
program
Consequ
Freezing
Freezing
freezing
Frost Hea
The long
become
the gas i
but also
Increase
If the PR
the grou
different
resulting
Example
b) Heal
NGN det
fault data
Fault Da
Analysis
used to
Based o
point’ fo
within a
asset.
The Inves
cality Asse
ting is a critic
ficant. If the p
assets can t
mme.
uences of fail
g of Outlet Pip
g of the outlet
of control pil
ave: Environm
ger the pre-he
. Frost heave
is below freez
pavements,
e PREs in MP/
RI is close eno
nd; cold gas
pipe materia
g in more esc
es of the cons
lth Assessm
termines the
a, age, physi
ta
of historic fa
develop assu
on this analys
r the asset he
five year peri
stment Jo
ssment
cal activity on
pre-heating fa
ake from 6 to
lure include p
pework: Loss
t pipework ca
ots.
mental Dama
eating on site
e results from
zing, if left the
roads and ot
/LP systems:
ough to the L
may enter th
als. For exam
apes.
sequence of
ment
health of its
cal condition
ault data of N
umptions on
is a threshold
ealth assessm
od are reach
ourney
gas pressure
ault is not abl
o 24 months
potential loss
s of Supply
an lead to a p
age
e is non-oper
m ice build-up
e consequen
ther third par
Safety
LP (Low Pres
he MP/LP ne
ple cast/duct
pre-heating f
pre-heating a
n, subject ma
GN’s pre-hea
asset health.
d against qua
ment. For all
hed. After this
e reduction fa
le to be rectif
based on the
of supply an
potential loss
rational the m
p around burie
nces can bec
rty land which
sure) system
twork. This w
tile iron beco
failures on NG
assets using
tter expert as
ating assets
antities of fau
pre-heating a
s point there
acilities and t
fied, i.e. fix on
e complexitie
nd environme
of gas to the
more significan
ed pipelines,
come catastro
h the pipeline
m, meaning ga
would affect t
ome more brit
GN assets ar
a wide range
ssessment an
identified som
lts was estab
assets this th
is an ongoing
the conseque
n fail is not po
es of a design
ental and safe
e downstream
nt the proble
i.e. on the ou
ophic not onl
e passes und
as cannot rec
the physical c
ttle at lower t
re demonstra
e of data and
nd manufactu
me clear tren
blished which
hreshold occu
g significant d
15
ences of failu
ossible, repla
n and build
ety impacts:
m system thro
ms of frost h
utlet of PRIs
y damaging t
er.
cover heat th
characteristic
temperatures
ated below:
d information
urer’s guideli
ds which cou
h acts as a ‘ti
urs when 40
deterioration
ure can
acement
ough
eave can
when
the site
rough
cs of
s
including
nes.
uld be
pping’
faults
in the
For WBH
and rem
below). F
rate of a
Figure 2
Figure 2
Following
within th
Figure 2
0100200300400500600
200
y
y
0
50
100
150
200
200
16
Hs at this thre
edial action,
For package
n additional e
.2: Deterioration
.3: Deterioration
g this analysi
e last five yea
.4: Data Sample
y
y
05 2006 200
y = 7.4x - 147
y = 5.2x - 104
04 2006
eshold, histor
deterioration
boilers opera
eight faults pe
n Rates - WBH
n Rates Boiler Pa
s NGN has id
ars. An exam
e Example (PRI’s
= 37.8x - 754
y = 5.5x - 11
07 2008 200
734
416
2008
ric performan
n will increase
ating at the 4
er year.
ackages
dentified eac
mple of the da
s)
469
000
09 2010 201
2010 20
nce data indic
e at a rate of a
40 faults in fiv
h pre-heating
ata is provide
1
012
cates that, ev
an additional
e year thresh
g asset and t
ed in Figure 2
WBH with in five yea
WBH with faults in fiv
Boiler pacforty fault
Boiler pacthan forty
ven with ongo
40 faults eac
hold deteriora
he number o
.4 below.
over forty fars
less than fove years
ckages withs in five yea
ckages withy faults in fiv
oing mainten
ch year (Figu
ation will incre
of faults per a
faults
orty
h over ars
h less ve
nance
re 2.2
ease at a
asset
When co
network
options a
Age/Obs
With the
NGN’s a
the asse
With the
replacem
solutions
It is wort
supplem
with diffic
a single
For the c
exceed 2
Physical
Other th
assessm
Subject M
There ar
maintena
maintain
prolong
have can
network
and failu
Manufac
All the ne
Potterton
c) Netw
Following
populate
onsidering ho
to optimise t
are detailed f
solescence
exception of
asset health a
et health indic
exception of
ment of a WB
s to pre-heat
th noting that
ment the pre-h
culties to get
or bank of W
current boiler
20 years old
Condition
an fault data
ment. This will
Matter Exper
re only 106 W
ance the ope
ned for severa
the life and e
nnibalised WB
engineers is
re to replace
cturers Guide
etwork boiler
ns guidelines
work Risk
g the criticalit
ed for PRIs an
ow to set the
the pre-heati
further on in t
f one WBH w
assumptions
ces.
f one Italian c
BH is not an o
ing are far mo
t within the c
heating alread
t the WBH fu
WBHs with like
r package po
over RIIO-GD
, physical con
l be supplem
t Opinion
WBHs on the
erational staff
al years to all
ensure replac
BH parts to e
that the opp
e will lead to a
lines
r packages a
s recommend
ty and asset
nd Offtakes.
fault thresho
ng asset life w
this report.
within the netw
we considere
company (Fio
option, they a
ore beneficia
urrent GDPC
dy on site. Th
lly functional.
e-for-like is n
opulation NGN
D1.
ndition of the
mented with fie
network and
are very fam
ow NGN to m
cement timesc
ensure these
portunities to
an exponentia
re currently p
d a design life
health asses
old NGN cons
whilst mainta
work all othe
ed any WBH
orentini) WBH
are inefficient
al from an env
CR1 the netw
his proved to
. From experi
ot an effectiv
N has record
e asset has b
eld surveys w
, as a result o
miliar with thes
maximise the
cales were o
assets are k
keep mainta
ally increasing
provided by P
e of 15 years
ssments unde
sidered sever
aining an acce
r WBH are ov
over 30 year
H are no longe
and unsupp
vironmental a
ork installed
o be an expen
ience NGN, c
ve option to th
s of all install
een determin
which are cur
of the high fa
se critical ass
asset life an
ptimised. Ov
kept operation
ining/fixing th
g risk to their
Pottertons (as
for one of th
ertaken by NG
ral options w
eptable level
ver 40 years
rs old to be c
er manufactu
orted items o
and safety po
a single WBH
nsive option a
considers rep
his pre-heatin
ation dates m
ned through s
rrently ongoin
ault frequenci
sets. Pre-hea
d effectively ‘
ver the years t
nal. The stron
hese assets a
r successful o
s is the case
eir boiler pac
GN the asset
17
hich would a
of risk. Thes
old. As part
categorised a
ured. Like-for
of plant and m
oint of view.
H at Pannal to
and has been
placement/ad
ng problem.
many of whic
subject matte
ng in 2012.
es and sched
ating has bee
‘sweat’ the a
the operation
ng view of the
are becoming
operation.
across the in
ckages.
t health table
allow the
e
of
as HI4 on
-like
modern
o
n fraught
ddition of
ch will
er expert
duled
n
asset to
nal staff
e
g limited
ndustry).
s were
Offtakes
Asset He
17 NT
Of
Asset He
17 NT
Of
NGN has
useful liv
In 2012,
package
rates thr
and six b
reflection
and six b
PRI’s
Asset He
18 PR
PR
18
s
ealth and Crit
Asset categorie
TS Offtakes
fftakes – Pre-he
ealth and Crit
Asset categorie
TS Offtakes
fftakes – Pre-he
s assumed, w
ves by the en
based on a
es in need of
roughout RIIO
boiler packag
n in reality. In
boiler packag
ealth and Crit
Asset categorie
RI’s above 7 Ba
RI’s – Pre-heatin
ticality - Curre
es
ating
ticality - With
es
ating
without inves
d of RIIO-GD
fault thresho
replacement
O-GD1 it wou
ges). Having c
stead NGN b
ges would be
ticality - Curre
es
r
ng
ent Condition
Criticality In
Low
Medium
High
Very Hig
hout Investm
Criticality In
Low
Medium
High
Very Hig
stment six bo
D1.
ld of 40 faults
. If the netwo
uld indicate a
consulted wit
believe that th
e beyond thei
ent Condition
Criticality In
Low
Medium
High
Very Hig
n
ndex As
H
m
h
ent
ndex Ass
H
m
h
iler packages
s in five years
ork extrapolat
ll Offtake pre
th the networ
hrough targe
r useful lives
n
ndex
H
m
h
set distribution b
HI1 HI2
1 1
set distribution b
HI1 HI2
1
s and 16 WB
s, NGN would
ted the curre
e-heating wou
rk engineers
ted replacem
without inves
Asset distributio
HI1 HI2
1
10
based on estima
31 March 20
Asset health i
HI3
3
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
BHs would be
d have 20 W
ent fault data
uld need to b
this is not fel
ment and mai
stment.
on based on est
31 March 20
Asset Health I
HI3
2
9
ated asset health
011
ndex
HI4
41
ted remaining us
011
eful Life
0%)
HI4
23
e at the end o
BHs and five
and deteriora
be replaced (3
t to be an ac
ntenance 16
timated asset he
011
Index
HI4
10
66
h index at
HI5
seful life at
HI5
22
of their
e boiler
ation
39 WBHs
ccurate
WBHs
ealth at
HI5
Asset He
18 PR
PR
NGN has
useful liv
In 2012,
package
througho
boiler pa
on reality
boiler pa
d) Inve
The inve
Option 1
The netw
of supply
Option 2
Setting t
deteriora
• W
• Bo
Option 3
Setting t
deteriora
• W
• Bo
Option 4
Setting t
deteriora
• W
• Bo
Each of
ealth and Crit
Asset categorie
RI’s above 7 Ba
RI’s – Pre Heatin
s assumed, w
ves by the en
based on a
es in the need
out RIIO-GD1
ackages). Hav
y. Instead NG
ackages wou
estment Op
estment optio
: Do Nothing
work conside
y, safety and
2: Set the Five
the fault thres
ation, the num
WBHs requirin
oiler package
3: Set the Five
the fault thres
ation, the num
WBHs requirin
oiler package
4: Set the Five
the fault thres
ation, the num
Water bath he
oiler package
the options h
ticality - With
es
r
ng
without inves
d of RIIO-GD
fault thresho
d of replacem
1 it would ind
ving consulte
GN believe th
ld be beyond
ptions
ons considere
g
ered a ‘do not
environment
e Year Fault T
shold at 40, b
mber of pre-h
ng replaceme
es requiring r
e Year Fault T
shold at 40, b
mber of pre-h
ng replaceme
es requiring r
e Year Fault T
shold at 100,
mber of pre-h
aters requirin
es requiring r
has been eva
hout Investm
Criticality In
Low
Medium
High
Very Hig
stment 20 bo
D1.
ld of 40 faults
ment. If the ne
dicate all PRI
ed with the ne
at through ta
d their useful
ed by NGN a
thing’ option
tal considera
Threshold at
based on act
heating replac
ent = 40
replacement
Threshold at
based on act
heating replac
ent = 34
replacement
Threshold at
based on ac
heating replac
ng replaceme
replacement
aluated in Figu
ent
ndex Ass
H
m
h
iler packages
s in five years
etwork extrap
pre-heating w
etwork engin
argeted repla
lives without
re summarise
for pre-heati
tions would b
40
ual fault data
cements wou
= 16
50
ual fault data
cements wou
= 12
100
ctual fault dat
cements wou
ent = 22
= 10
ure 2.5 below
set distribution b
HI1 HI2
s and 16 WB
s, NGN would
polated the fa
would need t
eers this is n
cement and
investment.
ed below.
ing but it con
be unaccepta
a this year an
uld be:
a this year an
uld be:
ta this year a
uld be:
w:
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
Hs would be
d have 27 W
ault data and
to be replace
ot felt to be a
maintenance
nsidered the l
able.
d taking no a
d taking no a
nd taking no
19
ted remaining us
011
eful Life
0%)
HI4
6
56
e at the end o
BHs and 12
deterioration
ed (69 WBHs
an accurate r
e 16 WBH an
evel of risk to
account of fut
account of fut
account of f
seful life at
HI5
7
29
of their
boiler
n rates
and 34
reflection
d 20
o security
ture
ture
uture
e
R
(t
th
F
S
S
E
L
C
D
F
*
20
e) Investment D
Measure
Recommended Asset U
aking into account det
hroughout RIIO-GD1)
inancial
Safety
Security of Supply
Environmental
Level of Risk
Comments
Decision
igure 2.5
boiler packages re
Decision
Upgrades
terioration
Ong
cost
cost
unre
still n
the n
Safe
and
Sign
throu
critic
WBH
high
emm
Very
RIIO
Not
emain constant ba
Option One
(Do nothing)
0
oing increasing mainte
s and substantial unqu
s if a pre-heating asse
epairable. These assets
need replacing at some
near future.
ety is not the principle d
manual ‘relights’
nifiant increase in risk to
uogh catestropic failure
cal heater
H are highly inifficent re
gas use. Also signifiat
missions from extra fau
y High and increasing th
O-GD1
recommended – too m
N/A
ased on the curren
enance
uantifiable
t is
s will also
e point in
Total inv
driver for this investmet
o supply
e of a
Signifian
throuog
critical h
esulting in
CO2
lt call outs.
Signifian
gas use
fault ca
hroughout Minima
much risk
Ideal so
for the c
feels it c
through
nt age profile of all
Option 2
(40 Faults in five years
WBH – 40
Boiler Packages – 26*
vestment circa £25m
tn however failure to re
nt increase in risk to su
gh catestropic failure of
heater
nt reduction in WBH he
e and reduction in CO2
ll outs
l risk retain by network
olution for the network
customer. The netowrk
coudl manage this leve
hout RIIO-GD1.
2
boilers and the po
s) (50
* Bo
Total inves
eplace these asset cou
upply
f a
Signifiant in
throuogh c
critical hea
eater
2 from
Signifiant r
gas use an
fault call ou
k Accpetable
network
but not
k also
el of risk
Acceptable
netwrok re
risk
otential rapid deter
Option 3
0 Faults in five years)
WBH – 32
oiler Packages – 26*
stment circa £21m
udl have safety impact o
ncrease in risk to supp
catestropic failure of a
ater
reduction in WBH heate
nd reduction in CO2 fro
uts
e level of risk retained b
e solution where the
etains a managable leve
1
rioration throughou
(100 F
Boiler
Total investem
on operational staff thr
ply Signifiant incr
throuogh cate
critical heater
er
om
Signifiant redu
gas use and r
fault call outs
by Unacceptable
network
el of
Unaceptable
the network w
manage the r
would still be
catestropic fa
ut RIIO-GD1.
Option 4
Faults in five years)
WBH – 28
r Packages – 26*
ment circa £19m
rough night time call ou
ease in risk to supply
estropic failure of a
uction in WBH heater
reduction in CO2 from
e level of risk retained b
solution it is antipated
would not be able to
isk at this level and the
a signifiant chance of
ailure of the asset.
N/A
uts
by
ere
Investme
NGN be
of the pr
maintain
NGN be
continue
RIIO-GD
This solu
utilisation
solution.
Offtakes
17 NT
Of
16 WBH
PRI’s - W
18 PR
PR
16 WBH
2.4 In order
prioritisin
envisage
• Fa
• O
• Pr
ent Decision:
lieves the rec
re-heating as
ning enough r
lieves that ad
e to cannibalis
D1.
ution is a con
n of the skills
s - With Inves
Asset categorie
TS Offtakes
fftakes – pre-hea
H, six boiler pa
With Investme
Asset categorie
RI’s above 7 Ba
RI’s – Pre Heatin
H, 20 boiler pa
Selectionto manage th
ng heater rep
e that the follo
aults data;
Operating pres
ressure cut;
: Option 3
commended
sets. It allows
risk to benefit
dopting this s
se the parts t
nservative app
s of the netwo
stment
es
ating
ackages. (No
ent
es
r
ng
ackages. (Th
n Criteria he risk appro
placement ba
owing factors
ssure tier;
option is opt
s the network
t the custome
strategy will a
to ensure the
proach to the
ork engineers
Criticality In
Low
Medium
High
Very Hig
ote one new b
Criticality In
Low
Medium
High
Very Hig
ree new pac
opriately NGN
ased on a culm
s will be cons
tion 3 above
k to mitigate
er.
allow the netw
e retained WB
e pre-heating
s to sweat the
ndex Ass
H
m
h 2
boiler packag
ndex Ass
H
m
7
h 3
kage boilers
N is developin
mination of fa
sidered in the
being the opt
the risk to an
work to remov
BH populatio
g problem fac
ese assets, it
set distribution b
HI1 HI2
23
ge was instal
set distribution b
HI1 HI2
7
32
also need ins
ng a selection
actors. Althou
e criteria.
timum solutio
n acceptable
ve the highes
n will remain
cing the netw
t is considere
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
led during GD
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
stalling over R
n criteria meth
ugh the deta
21
on for manag
level whilst
st risk WBH a
operation th
ork and, thro
ed the optimu
ted remaining us
011
eful Life
0%)
HI4
23
DPCR1)
ted remaining us
011
eful Life
0%)
HI4
6
53
RIIO-GD1)
hodology for
il is not finalis
gement
and
roughout
ough
um
seful life at
HI5
seful life at
HI5
sed it is
• Fl
• D
• N
The rem
managed
of these
2.5 NGN are
alternativ
requirem
• U
a
• B
• Pa
Au
• Tu
• G
• Id
2.6
Environm
Environm
Custome
Social ob
Custome
Safety
Reliability
Broad ap
Figure 2
22
ow;
istance to ne
umber of cus
aining WBH
d effectively t
assets will b
Innovatioe committed
ve options th
ments on site.
se of Anaero
small Combi
iomass boiler
artnering with
uckland);
urbo expande
round/air sou
dentify how w
Output D
mental (broad me
mental (narrow m
er Service
bligations
er Connections
y
pproach to asset
.6: Pre-heating O
ext pressure r
stomers.
population (7
through an o
e extended f
on to innovation
at use alterna
. These includ
obic Digestion
ned Heat and
r for pre-heat
h biomass pr
er technology
urce heat pum
we may decid
eliverable
Policy Area
easure)
measure)
t management
Output Deliverab
reduction sta
76%), which i
ngoing maint
or at least an
n and as part
ative technolo
de:
n (AD) plant to
d Power (CH
ting;
roduction fac
y;
mps/Photo V
e to take the
es
bles
ation; and
nclude many
tenance and
nother nine ye
of this invest
ogies to prov
o generate b
HP);
ilities to prov
Voltaic (PV) ce
se forward th
N/A
Increa
N/A
N/A
N/A
Increa
Secur
N/A
y assets of a
where requir
ears out to 20
tment we are
vide some or
iomethane to
ide heat requ
ells; and
hrough our in
ased efficiency o
ase safety of ma
rity of supply ma
similar age a
red, repair pr
021.
e currently co
all of the pre
o fuel boilers/
uirements to
nnovation stra
Primary Outpu
of new boiler pac
aintenance for op
aintained
and type, will
rogramme. U
onsidering a r
e-heating
/WBHs and p
sites (e.g. Bis
ategy.
uts
ckages over WB
perational engine
be
tilisation
range of
potentially
shop
BH’s
eers
A19A
3.1 E&I syste
lighting,
NTS Offt
quality u
There ar
manage
ensure s
• 89
• 13
• 23
Basic E&
technolo
have had
last two
six sites
Many of
to a poin
to meet
be individ
upgrade
The drive
compon
given to
Example
A-3: Elec
Introductems and equ
communicat
takes to the c
sed for netw
re 250 sites w
the network
safe operation
9 below 7Bar
38 above 7B
3 Offtake site
&I equipment
ogy. They hav
d the E&I equ
years specifi
being refurbi
the systems
nt where ther
current legisl
dually redesig
e it is expecte
ers for this pr
ents and sta
methods of i
es of the curre
ctrical an
tion uipment are u
ions, meterin
consumer, pr
ork control a
with E&I equip
on a daily/ho
n within a haz
r sites;
ar sites; and
es.
and infrastru
ve not neede
uipment repla
c projects ha
ished/upgrad
and equipm
re is a potent
lative requirem
gned to minim
ed that sites w
roject are saf
ndardise des
installation an
ent condition
nd Instru
utilised across
ng to ensure s
roviding key
and customer
pment provid
ourly basis, m
zardous area
ucture on the
d much capit
aced during m
ave been dev
ded to the lat
ent have now
ial safety issu
ments, there
mise cost an
will not requir
fety and secu
sign. Due to i
nd protection
n of specific E
umentat
s the network
safe, secure
information o
r/shipper sup
ding a diverse
many of these
a. These sites
ese sites are o
tal investmen
major Above
veloped to ad
est legislative
w reached the
ue. It is intend
is no single s
d maximise t
re major inves
urity of supply
ncreased me
n to discourag
E&I installation
ion (E&I)
k to provide c
and complia
on odorisation
pport.
e range of ap
e systems uti
s are compris
over 35 years
nt over that p
Ground Insta
ddress the lon
e requiremen
e end of their
ded to assess
solution to ap
the future life
stment for a f
y, new design
etal theft from
ge attempted
ns are shown
) Site Up
control, telem
nt transporta
n, flow, press
plications an
lise specialist
sed of:
s old and use
period, a sma
allation (AGI)
ng term infras
ts.
r useful life an
s each site to
pply at each
of the equipm
further 30-40
ns will be don
m sites carefu
d theft.
n below:
23
pgrades
metry, heating
ation of gas fr
sure, energy a
d are crucial
t techniques
e outdated
all number of
rebuilds, and
structure issu
nd are deterio
o replace equ
location, eac
ment. Follow
0 years.
ne to minimis
l consideratio
g,
rom the
and gas
to
to
sites
d over the
ues with
orating
uipment
ch site will
wing
se
on will be
3.2 Basic E&
investme
AGI rebu
infrastruc
3.3 Within th
sites and
directly b
and Con
This tran
(2009/10
Telemetr
Figure 3
3.4
a) Critic
Sites are
member
There ar
compati
systems
earthing
within ha
Basic mo
corrodin
network
a pressu
are in a m
NGN co
of the Ele
Regulatio
systems
b) Heal
Initial pla
Ongoing
are alrea
The elec
maintena
safety iss
site refur
compati
protect s
24
Current P&I equipment
ent over that
uilds, and ove
cture issues w
RIIO-GD1he RIIO-GD1
d replace/upg
by Asset Hea
ntrol Below 7B
nslates to the
0 prices)
ry & Control)
.1: RIIO-GD1 Te
The Inves
cality Asse
e now beginn
rs of the publ
re also issues
bility conflicts
. If CP system
is non-comp
azardous are
onitoring inst
g, these need
control issue
ure containing
moderate co
nsiders a ‘do
ectricity at W
on 4(3) requir
shall be carr
lth Assessm
ans have high
g site audits w
ady in NGN’s
ctrical assets
ance work. S
sues with ba
rbishments h
ble predomin
staff or maint
Price Cont and infrastru
period, a sm
er the last two
with six sites
Investmeperiod NGN
grade Instrum
alth Category
Bar”.
investment p
13/14
1.1
elemetry & Contr
stment Jo
ssment
ning to degrad
ic and also h
s associated w
s needs to be
ms are non-c
pliant the safe
as.
trumentation
d to be repla
es in managin
g part. A num
ndition and w
o nothing’ for
Work Regulatio
res that every
ried out as no
ment
hlighted sites
will clearly risk
Capex plan
have been as
Specific priorit
dly corroded
ave identified
nantly in the N
tain corrosion
trol Run Ructure on the
mall number o
o years spec
being refurb
ent Requproposes to
mentation sys
y 22 “Telemet
profile identifi
14/15 15
1.4 1
rol Expenditure
ourney
de to a point
have security
with the Cath
e addressed
compliant it c
ety of staff is
systems are
aced, failure c
ng the gas ne
mber of sites w
will not be rep
the specific
ons that NGN
y work activit
ot to give rise
with known
k assess rem
for 2012 and
ssessed by s
ty has been a
main site dis
d that the elec
North of the n
n protection,
Rates ese sites are o
of sites have h
cific projects h
bished/upgrad
irementsreplace and
stems on 94
try and Contr
ied in the follo
5/16 16/17
.3 1.2
where they c
of supply imp
hodic Protect
to ensure int
an lead to po
jeopardised
now obsolet
could lead to
etwork to opt
were upgrad
placed within
assets identif
N has a duty
ty, including o
e, so far as is
and immedia
maining sites t
d are part of t
subject matte
assigned to a
stribution cab
ctrical earthin
network. The
all relevant si
over 35 years
had the E&I e
have been de
ded to the lat
upgrade elec
out of 250 sit
rol Above 7Ba
ow asset hea
17/18 1
1.3
can be a pote
plications if p
tion (CP) syst
egrity of CP s
otential corro
and could lea
te on a numb
security of su
timise storag
ed between
the RIIO-GD
fied above is
holder role to
operation, us
reasonably p
ate safety req
to further prio
this ongoing
er experts wh
a number of s
binets which
ng system an
ese sites are n
ites will be up
s old and hav
equipment rep
eveloped to a
test legislative
ctrical system
tes. The E&I
ar” and Cate
alth tables an
18/19 19/20
1.1 1.1
ential safety r
power were to
tem and elec
system and s
sion problem
ad to potentia
ber of sites an
upply issues.
e and contro
20 and 25 ye
D1 period.
unacceptab
o maintain its
se and mainte
practicable, t
quirements an
oritise work. T
rolling progra
ho carry out s
sites where it
have direct p
nd site CP sys
not to the req
pgraded to co
ve had little c
placed during
address the lo
e requiremen
ms on 125 ou
investment is
gory 4 “Telem
nd Figure 3.1
0 20/21
1.1
risk to both s
o be lost to th
ctrical earthing
safety of elec
ms and if elec
al ignition sou
nd pressure f
. This will cau
ol or potential
ears ago, the
le. It is a requ
s sites in a sa
enance on or
to danger.
nd obsolesce
The most urg
amme of wor
site audit and
t is known the
public access
stems are no
quired standa
omply.
apital
g major
ong term
nts.
ut of 250
s driven
metry
below:
TOTAL
9.6
staff and
he site.
g where
ctrical
trical
urces
fittings
use
failure of
ese sites
uirement
afe state.
r near
ence.
gent sites
rk.
d
ere are
s. Recent
ot
ards to
The upg
robust, m
legislativ
infrastruc
strategy
technolo
c) Netw
Following
populate
categorie
E&I belo
Asset He
4 Te
LT
Asset He
4 Te
LT
E&I belo
Asset He
4 Te
LT
rade of elect
maintainable,
ve compliance
cture meets c
may also de
ogy.
work Risk
g the criticalit
ed for E&I Be
es have been
w 7Bar Electr
ealth and Crit
Asset categorie
elemetry & Cont
TS – Electical Sy
ealth and Crit
Asset categorie
elemetry & Cont
TS – Electical Sy
w 7Bar - Inst
ealth and Crit
Asset categor
elemetry & Cont
TS – Instrumenta
rical and inst
compliant a
e. The propo
current desig
liver reductio
ty and asset
low 7Bar, E&
n based on s
rical Systems
ticality - Curre
es
rol
ystems
ticality – With
es
rol
ystems
trumentation
ticality - Curre
ries
rol
ation Systems
rumentation
nd safe, whil
osals allow for
gn criteria allo
on in maintena
health asses
&I Above 7Ba
ubject matte
s
ent Condition
Criticality In
Low
Medium
High
Very Hig
hout Investm
Criticality In
Low
Medium
High
Very Hig
n Systems
ent Condition
Criticality
Low
Mediu
High
Very Hi
assets will en
e ensuring th
r phased upg
owing rationa
ance activity
ssments unde
ar and E&I Off
r expert asse
n
ndex As
H
m
h
ent
ndex Ass
H
m
h
n
Index As
H
m
h
igh
nsure that the
he site infrastr
grade targetin
alisation of ou
by the install
ertaken by NG
ftakes. Deter
essment.
set distribution b
HI1 HI2
set distribution b
HI1 HI2
set distribution b
HI1 HI2
e network co
ructure is upg
ng higher risk
ur distribution
lation of new
GN the asset
ioration rates
based on estima
31 March 20
Asset health i
HI3
39
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
based on estima
31 March 20
Asset health i
HI3
54
25
ontrol system
graded to me
k sites first, en
system. This
and advance
t health table
s for all these
ated asset health
011
ndex
HI4
ted remaining us
011
eful Life
0%)
HI4
39
ated asset health
011
ndex
HI4
35
remains,
eet
nsuring
s
ed
s were
h index at
HI5
50
seful life at
HI5
50
h index at
HI5
Asset He
4 Te
LT
E&I abov
Asset He
22 Te
LT
Asset He
22 Te
LT
E&I abov
Asset He
22 Te
LT
26
ealth and Crit
Asset categor
elemetry & Cont
TS – Instrumenta
ve 7Bar - Elec
ealth and Crit
Asset categorie
elemetry & Cont
TS – Electrical S
ealth and Crit
Asset categorie
elemetry & Cont
TS – Electricl Sys
ve 7Bar - Inst
ealth and Crit
Asset categorie
elemetry & Cont
TS – Instrumenta
ticality - With
ries
rol
ation Systems
ctrical System
ticality - Curre
es
rol
ystems
ticality - With
es
rol
stems
trumentation
ticality - Curre
es
rol
al Systems
hout Investm
Criticality
Low
Mediu
High
Very Hi
ms
ent Condition
Criticality In
Low
Medium
High
Very Hig
hout Investm
Criticality In
Low
Medium
High
Very Hig
n Systems
ent Condition
Criticality In
Low
Medium
High
ent
Index Ass
H
m
h
igh
n
ndex Asse
H
m 1
h
ent
ndex Ass
H
m 1
h
n
ndex Asse
H
1
m
set distribution b
HI1 HI2
et distribution ba
HI1 HI2
0
set distribution b
HI1 HI2
0
et distribution ba
HI1 HI2
2
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
ased on estimate
March 201
Asset health i
HI3
78
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
ased on estimate
March 201
Asset health i
HI3
86
ted remaining us
011
eful Life
0%)
HI4
54
ed asset health
11
ndex
HI4
ted remaining us
011
eful Life
0%)
HI4
78
ed asset health
11
ndex
HI4
45
seful life at
HI5
35
index at 31
HI5
55
seful life at
HI5
55
index at 31
HI5
Asset He
22 Te
LT
Asset categorie
ealth and Crit
Asset categorie
elemetry & Cont
TS – Instrumenta
es
ticality - With
es
rol
al Systems
Criticality In
Very Hig
hout Investm
Criticality In
Low
Medium
High
Very Hig
ndex Asse
H
h
ent
ndex Ass
H
1
m
h
et distribution ba
HI1 HI2
set distribution b
HI1 HI2
2
ased on estimate
March 201
Asset health i
HI3
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
86
27
ed asset health
11
ndex
HI4
ted remaining us
011
eful Life
0%)
HI4
index at 31
HI5
seful life at
HI5
45
E&I abov
Asset He
22 Te
Of
Asset He
22 Te
Of
E&I abov
Asset He
22 Te
Of
Sy
28
ve 7Bar - Offt
ealth and Crit
Asset categorie
elemetry & Cont
fftakes – Electric
ealth and Crit
Asset categorie
elemetry & Cont
fftakes – Electric
ve 7Bar - Offt
ealth and Crit
Asset categorie
elemetry & Cont
fftakes – Instrum
ystems
takes Electric
ticality - Curre
es
rol
cal Systems
ticality - With
es
rol
cal Systems
takes Instrum
ticality - Curre
es
rol
mental
cal Systems
ent Condition
Criticality In
Low
Medium
High
Very Hig
hout Investm
Criticality In
Low
Medium
High
Very Hig
mentation Sys
ent Condition
Criticality In
Low
Medium
High
Very Hig
n
ndex Asse
H
m
3
h
ent
ndex Ass
H
m
h
stems
n
ndex Asse
H
m 3
h
et distribution ba
HI1 HI2
3
set distribution b
HI1 HI2
3
et distribution ba
HI1 HI2
3
ased on estimate
March 201
Asset health i
HI3
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
ased on estimate
March 201
Asset health i
HI3
ed asset health
11
ndex
HI4
20
ted remaining us
011
eful Life
0%)
HI4
ed asset health
11
ndex
HI4
20
index at 31
HI5
seful life at
HI5
20
index at 31
HI5
Asset He
22 Te
Of
Sy
NGN has
useful liv
d) Inve
The inve
Below 7B
Offtakes
Above 7B
Figure 3
Option 1
The netw
requirem
a safe st
on or ne
Option 2
Reducin
upgrade
increasin
Option 3
Following
safety of
health su
extensive
ealth and Crit
Asset categorie
elemetry & Cont
fftakes – Instrum
ystems
s assumed, w
ves by the en
estment Op
estment optio
Bar
Bar
.2: Investment O
: Do Nothing
work conside
ment of the El
tate, Regulati
ear systems s
2: Reduce the
g the numbe
ed but would
ng risk.
3: Preferred O
g the asset h
f critical asse
urvey identify
e knowledge
ticality - With
es
rol
mental
without inves
d of RIIO-GD
ptions
ons considere
Electrical
Instrumentation
Electrical
Instrumentation
Electrical
Instrumentation
TOTAL
Options
g
ers a ‘do noth
ectricity at W
ion 4(3) requi
shall be carrie
e Number of S
er of total upg
leave some r
Option
health review
ts which are
y other sites b
e of these site
hout Investm
Criticality In
Low
Medium
High
Very Hig
stment 20 bo
D1.
ed by NGN a
n
n
n
hing’ for the s
Work Regulatio
ires that ever
ed out as not
Site Upgrade
grades is an o
risk, and sites
option three
known to be
by priority; su
es.
ent
ndex Ass
H
m
h
iler packages
re summarise
Option 1
0
0
0
0
0
0
0
specific asset
ons that NGN
ry work activit
to give rise,
es
option which
s not planned
is seen as th
e in a poor co
ubject matter
set distribution b
HI1 HI2
3
s and 16 WB
ed in Figure 3
Site
Option 2
40
10
15
14
45
30
154
ts identified a
N has a duty
ty, including
so far as is re
would allow
d would cont
he best comp
ondition and t
experts have
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
Hs would be
3.2 below.
e Upgrades
Option
50
35
20
14
55
45
219
above is unac
holder role to
operation, us
easonably pr
the highest r
tinue deterior
promise prog
through furth
e developed t
29
ted remaining us
011
eful Life
0%)
HI4
e at the end o
n 3 Op
2
cceptable. It i
o maintain its
se and mainte
racticable to d
risk sites to b
rating and ha
ram to ensur
er detailed as
the numbers
seful life at
HI5
20
of their
ption 4
65
50
15
14
70
65
279
is a
s sites in
enance
danger.
be
ve an
re the
sset
from
Option 4
Increasin
value, as
Each of
30
4: Increase th
ng the numbe
ssets above t
the options h
e Number of
er of sites ab
this number a
has been eva
f Site Upgrad
ove the prefe
are believed t
aluated in Figu
es
erred option i
to have a life
ure 3.3 below
s seen as un
greater than
w:
nnecessary an
this formula
nd does not
period.
add
e
R
(t
th
F
S
S
E
L
C
D
F
e) Investment D
Measure
Recommended asset u
aking into account det
hroughout RIIO-GD1)
inancial impacts
Safety
Security of Supply
Environmental
Level of Risk
Comments
Decision
igure 3.3: Summary of
Decision
pgrades
terioration
Som
T
rep
Min
will
Ver
No
f Evaluation of Investm
Option 1 (do nothi
0
me increase in maintena
These assets will also s
placing at some point i
future.
nimal risk to security of
be issues with network
electrical systems & te
systems fail
N/A
ry high safety to staff a
HSE intervention
ot recommended – too
Unacceptable
ent Options
ng) Option
ance costs.
still need
n the near
Total in
This
supply but
k control as
elemetry
Minima
will be
elect
and public,
n
High s
inte
much risk Ris
assess
done a
n 2 (reduce site upgrad
219 to 154)
150
nvestment reduced fro
to £7m
s work is safety and co
al risk to security of sup
issues with network co
rical & telemetry system
N/A
safety to staff and publ
ervention but would rem
highest risk
sk levels would need to
sed to ensure critical s
and no risk of HSE inte
Unacceptable
des from Optio
om £9.8 Total i
mpliance driven and a
pply but
ontrol as
ms fail
Minimal ri
alow crit
ic, HSE
move
Accpetab
o be
sites are
rvention
Accep
netwo
m
31
on 3 (upgrade 219 site)
219
investment circa £9.8m
s such safety risk is hig
sk to security of supply
tical sites to be prioratis
N/A
ble level of risk retained
network
table solution where th
orkcan demonstrate it i
managing the risk
Acceptable
) Option 4 (Incr
2
m Total inves
gh
y will
sed
Minimal risk t
alow critica
ear
d by Netw
he
s
This solution
as sites with
be upgra
U
rease site upgrades fro
219 to 300)
279
stement circa £12.5m
to security of supply w
l sites to be prioratised
rlier in the plan
N/A
work risk reduced
is seen as unnessesa
h considerable life woul
aded unnessessarily.
Unacceptable
om
will
d
ry
d
Investme
NGN be
network
complian
NGN be
extendin
Due to th
period a
optimum
E&I Belo
Electrica
4 Te
LT
Instrume
4 Te
LT
32
ent Decision:
lieves that op
to mitigate th
nce.
lieves that ad
ng the asset l
he nature of t
nd have been
m solution.
w 7Bar - LTS
l Site Upgrad
Asset categorie
elemetry & Cont
TS – Electrical S
entation Site
Asset categorie
elemetry & Cont
TS – Instrumenta
: Option 3
ption three is
he risk to an
dopting this s
ife considera
the gas infras
n sweated to
des
es
rol
ystems
Upgrades
es
rol
al Systems
the optimum
acceptable a
strategy will a
ably.
structure dev
o a point the a
Criticality In
Low
Medium
High
Very Hig
Criticality In
Low
Medium
High
Very Hig
m solution for
and demonst
allow the netw
velopment a l
assets are at
ndex Ass
H
m 5
h
ndex Ass
H
3
m
h
managemen
trable level w
work to remov
arge number
the end of th
set distribution b
HI1 HI2
50
set distribution b
HI1 HI2
35
nt of the E&I a
hilst maintain
ve the highes
r of assets we
heir life, this is
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
assets. It allow
ning legislative
st risk sites a
ere built in a
s considered
ted remaining us
011
eful Life
0%)
HI4
39
ted remaining us
011
eful Life
0%)
HI4
54
ws the
e
and
similar
d the
seful life at
HI5
seful life at
HI5
E&I Abov
4 Te
LT
4 Te
LT
E&I Abov
4 Te
Of
4
ve 7Bar - LTS
Asset categorie
elemetry & Cont
TS – Electrical S
Asset categorie
elemetry & Cont
TS – Instrumenta
ve 7Bar Offta
Asset categorie
elemetry & Cont
fftakes – Electric
Asset cate
Telemetry & Co
Offtakes – Instru
es
rol
ystems
es
rol
al Systems
akes`
es
rol
cal Systems
egories
ontrol
umental System
Criticality In
Low
Medium
High
Very Hig
Criticality In
Low
Medium
High
Very Hig
Criticality In
Low
Medium
High
Very Hig
Asse
H
ms
ndex Ass
H
m 6
h
ndex Ass
H
5
m
h
ndex Ass
H
m
1
h
et distribution ba
HI1
20
set distribution b
HI1 HI2
65
set distribution b
HI1 HI2
57
set distribution b
HI1 HI2
4 3
ased on estimat
RemainExpe
HI2
3
based on estimat31 March 20
Remaining UseExpected (50
HI3
based on estimat31 March 20
Remaining UseExpected (50
HI3
86
based on estimat31 March 20
Remaining UseExpected (50
HI3
ted remaining us
ing Useful Life ected (50%)
HI3
33
ted remaining us011
eful Life 0%)
HI4
78
ted remaining us011
eful Life 0%)
HI4
ted remaining us011
eful Life 0%)
HI4
seful life at 31 M
HI4
seful life at
HI5
seful life at
HI5
seful life at
HI5
6
arch 2011
HI5
3.5 In order
priority w
develop
Although
• Ph
• C
• Sh
• RC
• C
• El
• O
• C
• Su
• Sa
3.6 Each site
standard
equipme
Where p
metal the
3.7
Environm
Environm
Custome
Social ob
Custome
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ific Requiperiod NGN
e in terms acc
orecast
14 14/15
3 0.5
fftake Meter Upg
t the RIIO-GD
m. Detailed de
ge has been
ent Driveris essential th
from their end
ment session
ccuracy and
has 23 Offtak
hree sites per
Offtake flows
eed to have m
but not confin
tements Proc
e that any ch
to comply w
akes. This co
the capacity
Price Contn of UNC mo
ation with inc
advantage wa
SM in most b
a wider range
Auckland will
ure
ng to accurate
billing and re
are unable to
nts.
ter Upgr
irement thas made a
curacy +/- 1%
15/16
0.6
grades Including
D1 plan perio
esign work w
identified alo
r hat Shippers
d users. This
ns. Ofgem req
Ofgem unde
kes which are
r year.
: The introdu
more flexibility
ed to, Summ
cess (OCS) p
hanges to flat
with the above
uld result in m
to record acc
trol Run Rod 0195AV w
creasing the c
as taken to c
ut not all cas
e of flows. US
commence i
ely measure v
conciliation p
recover from
rades Inc
throughouprovision of
% at all expec
16/17 1
0.5
g Low Flow Mete
od has been a
hich will be c
ong with Bald
are billed co
has continue
quires NGN t
ertake annual
e audited by O
uction in 2012
y within the n
mer periods. F
present a con
t and flex Offt
e conditions i
metering inac
curately whe
Rates work on Offtak
capacity of th
concurrently u
ses are used t
SM have bee
n 2012 and b
volumes at th
process. This
m the end use
cluding L
ut RIIO-GD6.2m to enab
cted flow rang
7/18 18/1
0.9 0.8
ering
assessed at 1
completed in
dersby and Co
rrectly by NG
ed to be mad
o ensure Offt
audits to ens
Ofgem over a
2/13 of Offtak
network to op
Flat and flex c
ntractual oblig
take flows are
t is essential
ccuracies as
n changing fl
ke Metering w
he Offtake. W
upgrade/repla
to replace or
n installed at
be completed
he NTS Offta
s could result
er metered en
Low Flow
D1 ble NTS Offta
ges.
19 19/20
8 1.2
13 sites with
2013/4 will e
oldstream to
GN and they i
de very clear
take Metering
sure UNC me
a ten year pe
ke Reform (U
perate Offtake
commitments
gation betwee
e within agre
to have max
some meters
lows (turndow
was condition
When Offtake
ace the Offta
rifice plate me
Pannal, Elto
d in the first y
kes could res
in shippers p
nergy. This is
43
w Meter
ake metering
20/21
1.3
a unit cost o
establish the f
be complete
in turn are ab
to NGN at th
g is within an
etering accur
riod equating
UNC Mod 019
es at Low Flo
s as detailed
en NGN and
ed contractu
ximum flexibili
s (Orifice Plat
wn ratio) or d
n driven, prom
capacity upg
ake Metering.
eters as they
n, Thrintoft a
year of the RI
sult in signific
paying transp
s in strong co
ing
to meet
Total
6.0
of
full plan
ed in the
ble to
he
n
racy
g to
95 AV)
ows. This
in the
NTS.
al
ity to
te
during
mpted
grading
are
and
IIO-GD1.
cant
portation
onflict
Cost Def
Sites are
• O
• D
to
• C
C
Supplier
costs wi
Auckland
A full det
work req
5.4 NGN nee
the targe
complete
metering
a) Othe
All the si
rejected
5.5 Specific
5.6 Every eff
Metering
changing
impacts.
RIIO-GD
44
inition
e identified fro
Ofgem audits;
ata analysis a
o examine the
orbridge, Ba
orbridge as a
costs are av
ll be extracte
d.
tailed assess
quired within
Cost Beneed to ensure
et population
ed in 2013 w
g (OPM), repla
er Options C
tes with OPM
as it would n
Selectionsites will be e
Innovatiofort will be m
g is UNC com
g NGN’s ope
. This will ens
D1 period.
om:
and extracts
e sites which
ldersby and C
a follow up to
vailable for me
ed from recen
sment of all si
the plan peri
efit Analythat the Offt
and ensure
will establish t
acement with
Considered
M could be re
not ensure th
n Criteria established f
on ade at the de
mpliant within
erating proced
sure the minim
from the HP
have operate
Coldstream h
o an Ofgem C
eters. An est
nt installation
tes will be un
od.
ysis ake Metering
compliance a
he minimum
h USM or no
d
eplaced with
e optimum u
ollowing com
etailed design
the current a
dures to ensu
mum workloa
Managemen
ed at below 2
have been ide
Category one
imate has be
costs for Pa
ndertaken ea
g is compliant
at minimum c
number of s
changes to t
USM. This w
use of resourc
mpletion of de
n stage to loo
and future op
ure best mat
ad/expenditu
nt Information
20% flow ran
entified to co
e audit finding
een made for
nnal, Elton, T
rly in 2013 to
t with UNC. S
cost. The des
ites which re
the existing m
would be at m
ces/finance.
etailed design
ok at innovati
perating envir
ch of Meterin
re on replaci
n System (HP
nges; and
ommence ear
g.
the associat
Thrintoft, Hum
o finalise the s
Sites are bein
sign assessm
quire alteratio
metering arra
much higher c
n work in 201
ive ways to e
ronment. This
ng, Low Flow
ng Offtake M
PMIS). This is
rly in the plan
ted labour an
mbleton and B
scale and co
ng selected to
ment which w
ons to orifice
angements.
cost and has
3/14.
ensure the Of
s may involve
ws and turn do
Meters throug
primarily
n period.
d E&I
Bishop
st of the
o reduce
will be
plate
been
fftake
e
own
hout the
A19A
6.1 Across t
Compute
These co
approac
program
There ar
• C
be
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• O
a
up
The Ene
overall fo
over the
£m 2009
Prices
Energy F
Measure
Figure 6
6.2 The vario
spares h
which re
6.3 Energy F
it must o
equipme
network
smell an
Consequ
Failure o
Calorific
System C
reconcili
systems
consume
can be s
Conditio
A-6: Ene
The Speche NTS Offta
ers which are
omplex syste
ching the end
m to ensure th
re three main
alorimeters –
efore the end
alorimeter Co
Omni Flow Co
total replace
pgrade as dir
rgy Flow mea
orecasts for ‘T
RIIO-GD1 pe
9/10 20
Flow
ment 0.
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Current Rous elements
have been ca
equire special
InvestmeFlow Measure
operate 24/7
ent is also ess
and also a c
d as such a s
uence of Failu
of one of thes
Value proces
Control woul
ation proced
would need
er, due to the
shut down bu
n Assessmen
rgy Flow
ific Requiakes there are
e all critical fo
ems are over
of their oper
hese critical s
elements to
– The Calorim
d of the regula
ontrollers – R
omputers – Ar
ment will be
rected by Ofg
asurement in
Telemetry &
eriod;
13 2014
.0 0.1
nergy Flow Meas
Run Ratess of the energ
annibalised bu
list contracto
ent Driverement equipm
to avoid pos
sential to allo
critical part of
safety critical
ure
se assets will
ss and odora
d not be able
ures would b
manual setti
e near obsole
ut only if dem
nt
w Measu
irement te 12 Calorim
or the accurat
17 years old
rable life, it is
systems rema
critical energ
meters on the
atory review
RIIO-GD1 are
re now obso
required tow
gem to upgra
nvestment req
Control (abov
2015
0.1
surement Expen
s gy measurem
ut it is becom
ors to repair, f
r ment cannot
ssible meter e
ow System Co
the odorisat
application.
lead to failure
ant injection e
e to control th
be instigated
ng to ensure
escence such
mand in the ne
rement
throughoueters, 12 Ca
te compulso
and similar t
therefore inte
ain operationa
gy/flow meas
network are
all 12 calorim
now obsolet
lete, there are
wards the mid
ade the flow c
quired is show
ve 7Bar)’ and
2016
0.1
nditure
ment equipme
ming increasin
fault data is n
be maintaine
errors on gas
ontrol to mon
ion system w
e of the Offta
equipment.
he flow of ga
to try to calc
e safe levels o
h faults can ta
etwork of the
ut RIIO-GDlorimeter Con
ry measurem
to other elect
ended to imp
al and have a
surement:
approaching
meters will nee
te and unsup
e some spare
d-point of the
calculation to
wn in Figure
d shows how
2017 201
0.4 0.4
ent have inter
ngly difficult to
not collated a
ed on a ‘repla
entering the
nitor and con
which is used
ake Metering
as into the net
culate unacco
of odorant are
ake time to re
e existing equ
D1 ntrollers and
ment of energy
tronic equipm
plement a ph
a new asset l
g obsolescen
ed major inte
pported and n
es available b
RIIO-GD1 pe
o ISO 5167:2
6.1 below wh
w the investme
18 2019
4 0.4
rmittent faults
o find spares
at this level.
ace on fail’ m
network at t
ntrol the flow
to ensure th
and Flow We
twork correc
ounted gas, o
e present in g
esolve and to
uipment.
45
25 Omni Flow
y flow.
ment are at th
ased replace
ife.
nce. It is expe
ervention.
need replace
but it is expec
eriod. This al
003
hich sets out
ent is broken
2020
0.4
s and failures
s for these sys
methodology b
he Offtake si
of gas into th
e gas has the
eighted Avera
tly, meter
odorant inject
gas delivered
o mitigate this
w
he end or
ement
ect that
ment.
cted that
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our
n down
Total
1.9
, some
stems
because
tes. This
he
e correct
age
tion
d to the
s sites
All the as
contract
phased t
22 Te
Of
M
6.4 The Ene
of RIIO-G
structure
The ben
• C
• En
re
• Sa
• C
a) Othe
Do Noth
The optio
able to d
Long Ter
Phased
replaced
meet new
Long ter
46
ssets are of k
ors has been
to meet repla
Asset categorie
elemetry & Cont
fftakes – Energy
eaasurement
Cost Benergy Flow Mea
GD1, it is crit
ed program t
efits/outputs
ustomer – Se
nvironmental
educed vehic
afety – Ensur
ompliance –
er Options C
ing:
on to ‘do not
demonstrate
rm Phased Im
implementati
d equipment a
w accuracy r
rm phased im
known age an
n by suitable
acement by c
es
rol
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efit Analyasurement eq
ical to the ne
o mitigate the
of investing
ecurity of sup
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re gas meets
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Considered
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plans to keep
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and cannot b
requirements
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Criticality In
Low
Medium
High
Very Hig
ysis quipment ass
etworks contr
ese risks.
in these asse
pply, Shipper
he number of
), reduced us
s critical odor
with licence
d
viable option,
p the system
on
nger period h
be done for th
s set by Ofgem
n is not cons
, the assessm
er experts in
pares/functio
ndex As
H
m
h
sets are at th
rol and safety
ets are as foll
r data, Ofgem
faults and he
sage of helium
isation levels
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s operationa
has been con
he Omni Flow
m.
sidered practi
ment of useab
determining
on.
sset distribution b
HI1 HI2
e end of thei
y systems tha
ows:
m Data;
ence site visit
m carrier gas
; and
ent will fail at
l.
nsidered. This
w Computers
cal for this sm
ble spares an
the proposed
based on estima
current reportin
Asset health i
HI3
r life or expec
at these asse
ts (reduced c
in the calorim
t some point
s would requi
s which are b
mall number
nd available s
d program, w
ated asset healt
ng year
ndex
HI4
23
cted to be by
ets are replac
carbon footpr
meter;
and NGN mu
ire cannibalis
eing replaced
of assets.
specialist
which is
h index in
HI5
y the end
ced in a
rint with
ust be
sation of
d to
Asset He
Criticality
Low
Mediu
High
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Asset He
Criticality
Low
Mediu
High
Very H
6.5 The repla
6.6 This is a
ealth and Crit
y Index Ass
HI
w 0
um 0
h 0
High 0
ealth and Crit
y Index Ass
HI1
w 0
um 0
h 0
High 0
Selectionacement of t
Innovatiovery speciali
ticality - With
set distribution b
index
Ass
1 HI2
0
0
0
0
ticality – With
set distribution b
index
Ass
1 HI2
0
0
0
0
n Criteria he equipmen
on ist market an
h Investment
based on estima
at 31 March 20
set health index
HI3
0
0
0
0
hout Investm
based on estimat
at 31 March 20
set health index
HI3
0
0
0
0
nt has been p
d only Ofgem
ated asset health
017
HI4 HI5
0 0
0 0
0 0
23 0
ent
ted asset health
17
HI4 HI5
0 0
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phased based
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h Asset di
HI1
0
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23
h Asset di
HI1
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d on immedia
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stribution based
useful life at 3
Remaining
HI2 H
0 0
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ate obsolesce
an be used.
47
d on estimated re
31 March 2021
g useful life
HI3 HI4
0 0
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d on estimated re
31 March 2021
g useful life
HI3 HI4
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ence.
emaining
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0
0
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0
23
A19A
7.1 PRI Con
inspectio
based o
of only 7
based o
Offtakes
• Fi
• Sl
• Re
PRI’s ab
• Fi
• Sl
• Re
The cost
2009/10
£m
PRI con
upgra
Figure 7
This inve
capacity
large ass
Example
7.2
a) Curre
NGN are
mechani
work on
invested
48
A-7: PRI
The Specdition Upgrad
ons or have b
n current run
70 assets in to
n the followin
s:
lters x 4 (c.2
lamshuts x 2
egulators x 4
bove 7Bar:
lters x 22 (11
lamshuts x 1
egulators x 2
ts associated
Prices 20
ndition
ades 0.
.1: RIIO-GD1 P
estment profi
y drivers, it is
set base (bas
es of potentia
Justificati
ent Price C
e gathering as
ism for these
deterioration
an average c
Conditio
ific Requides cover tho
become obso
n rates and su
otal out of an
ng upgrade a
sites);
(c.1 site); an
4 (c.1 site).
1 sites);
0 (5 sites); an
28 (7 sites).
d with this sc
13 2014
.1 0.2
PRI condition upg
le shown abo
solely based
sed on individ
al condition u
ion for In
ontrol Run
sset health d
e assets. As s
n rate data an
c.£500k pa o
on Upgra
irement tose items of
olete or in a s
ubject matter
n asset base
assumptions:
nd
nd
hedule of wo
2015
0.9
grades Expendit
ove does not
on condition
dual units) co
pgrades are
vestment
Rates
data to suppo
such it is curr
nd methodolo
on this type o
ades
throughouplant on PRIs
state of disrep
r expert opini
of over 3,000
ork are shown
2016
0.7
ture
include thos
n and deterio
onservative as
shown below
t
ort a robust a
rently underta
ogy througho
of condition re
ut RIIO-GDs and Offtake
pair. The RIIO
on. The inves
0 individual u
n below:
2017 201
1.1 0.9
se sites/asset
ration driven
ssumptions h
w;
asset health m
aking surveys
out 2012/13.
eplacement.
D1 es that could
O-GD1 invest
stment includ
nits. In total t
18 2019
9 0.6
ts which are u
upgrades. A
have been ma
matrix and de
s of all its site
Currently the
The run rates
fail PSSR
tment has be
des the replac
the investme
2020
0.1
updated as a
As such, out o
ade.
eterioration ra
es and contin
e network ha
s forecast in
een
cement
nt is
Total
4.6
a result of
of such a
ate
ues to
s
RIIO-
GD1 hav
assessm
Consequ
The critic
gas syst
stations
Should t
implicatio
lives prio
principle
7.3 NGN are
Once co
physical
7.4 NGN are
replacem
7.5 The ben
• Sa
• Re
• En
an
ve been base
ment.
uence of Failu
cality of these
em is mainta
and failure co
these assets
ons and long
or to failure. O
es of determin
Selectione currently un
omplete a cle
characteristi
Innovatioe committed
ment and we
Benefits/efits/outputs
afety – Comp
eliability – Se
nvironment –
nd maintenan
ed on extrapo
ure
e major asset
ained. All the
ould lead to l
fail, replacem
g lead items t
Our Offtakes
ning asset co
n Criteria ndertaking sit
ar methodolo
cs including,
on to innovation
continue to c
/Outputs of investing
pliance with t
ecurity of sup
– Replacemen
nce efficiencie
olation of exis
ts is importan
assets in this
loss of supply
ment can take
o delivery. As
and PRIs sup
ondition are c
te surveys to
ogy for priorit
number of c
n and as part
consider a ra
in these asse
the PSSR reg
ply to our cu
nt of aged W
es.
sting trends s
nt to ensure c
s category are
y and serious
e up to 12 mo
s such, it is v
pply between
critical to our
better under
tisation will be
customers an
of this invest
ange of altern
ets are as foll
gulations;
stomers; and
WBH, with effic
supported by
customer sup
e vital to the
s environmen
onths based
vital to replace
n 1,000 & 600
investment p
rstand the cu
e established
nd condition.
tment we will
ative options
ows:
d
cient package
y subject mat
pplies, safety
network is pr
ntal and safet
on availabilit
e assets at th
0,000 consum
program.
rrent conditio
d based on si
l challenge co
s.
e design boil
49
ter expert
y and integrity
ressure reduc
ty implication
y of parts, de
he end of the
mers and the
on of all these
te and equip
onventional
ers ensuring
y of the
ction
s.
esign
eir useful
e
e assets.
pment
running
A19A
8.1 Gas deliv
gas a dis
injection
Key elec
years wit
Injection
number
replacem
8.2 Electron
no direct
Injection
undertak
outstand
has been
upgrade
The Odo
forecasts
period:
2009/10
£m
E&I od
system u
Figure 8
8.3 The Odo
compon
spares to
N200 Co
exhauste
8.4 The gas
custome
Controlle
a) Cons
Failure o
depends
allow rep
by a diffe
demand
50
A-8: Odo
The specivered from th
stinctive sme
system oper
ctronic compo
th no direct r
System and
of spares bu
ment of all Co
Asset Heaic equipment
t replacemen
System and
ken to ensure
ding. As a res
n classified a
ed sites.
orant Upgrad
s for ‘Teleme
Prices 20
dorant
upgrade 0.
.1: RIIO-GD1 E&
Current Rorant Injection
ents, most c
o meet opera
ontroller, the
ed.
Justificatientering the
er safety and
ers is essentia
sequence o
of Odorisation
s on the time
pair as mentio
erent design,
would clearl
orant Upg
ific requirhe NTS has n
ell. It is critical
rates correct
onents within
replacement.
is now obso
t these are n
ontrollers to e
alth t becomes ob
nt is available
is now obso
e continuity o
sult, from a te
as HI4 for the
e investment
etry & Contro
13 2014
.2 0.2
&I Odorant Syste
Run Ratesn Systems ar
omponents a
ational require
system has t
ion for InNetwork mu
as such mus
al to manage
of Failure
n equipment w
of year and c
oned above,
which as ou
y invoke an i
grades
rement thno smell, odo
l to the safe a
ly to precise
n the Odorisa
The N200 C
olete, four site
ow exhauste
ensure contin
bsolete as co
. The N200 C
olete, some s
of supply. To
elemetry & co
19 outstand
t required is s
l (above 7Bar
2015
0.2
em Upgrade Exp
s re complex e
are still availa
ements, as p
to be redesig
vestmentust be odorise
st be able to
e this risk in a
would lead to
criticality of th
the N200 Co
utlined would
ncident and c
hroughouorant is injecte
and efficient o
concentratio
ation Injection
Controller is a
es were upgr
ed within the
nuity of opera
omponents st
Controller is a
pares are ava
date four site
ontrols persp
ing sites and
shown in Ass
r)’ and details
2016
0.2
penditure
lectro/mecha
able or have d
parts fail in se
gned to fit a n
t ed to comply
maintain this
a demonstrab
o the gas not
he Offtake, if
ontroller simp
take a numb
consideration
ut RIIO-GDed at the 23
operation of t
n levels.
n System hav
critical comp
raded around
network. It is
ation moving f
top being ma
a critical com
ailable but a
es have been
ective, the O
d HI1 at this c
set Health 22
s the investm
2017 201
0.0 0.0
anical system
direct replace
ervice, there is
new controlle
y with our lice
equipment,
ble way.
t having a dis
possible the
ply cannot be
ber of months
n would have
D1 Offtakes (24
the network t
ve been obso
ponent within
d four years a
s proposed to
forwards.
anufactured a
ponent within
phased repla
n upgraded le
Odorant Tanks
current point
which sets o
ment required
18 2019
0 0.0
ms with nume
ements allowi
s no direct re
r as spares o
ence obligatio
replacement
stinct smell, c
e offtake can
e repaired and
s to impleme
e to be given
systems) to g
that this odo
olete for a num
n the Odorant
ago which pro
o start a phas
and supporte
n the Odoran
acement need
eaving 19 site
s asset health
in time for the
out our overa
over the RIIO
2020
0.0
rous critical
ing NGN to m
eplacement fo
of the N200 a
ons and ensu
of the N200
consequence
be shut dow
d must be re
nt, failure dur
to allow flow
give the
rant
mber of
t
ovided a
sed
ed and
nt
ds to be
es
h index
e four
all
O-GD1
Total
0.7
manage
or the
are now
ure
e
n to
placed
ring high
w of gas
which is
clearly u
b) Asse
All the as
contract
Asset He
22 Te
Of
c) Cost
Given th
in a struc
The ben
• C
• En
• Sa
• C
d) Othe
Do Noth
The optio
able to d
Long Ter
Phased
equipme
number
Asset He
underused o
nacceptable.
et Health Co
ssets are of k
ors has been
ealth Current
Asset cate
elemetry & Contr
fftakes - Odoura
Benefit An
e Odorant N2
ctured progra
efits/outputs
ustomer – Se
nvironmental
afety – Ensur
ompliance –
er Options
ing
on to ‘do not
demonstrate
rm Phased Im
implementati
ent is obsolet
of assets
ealth and Crit
Asset cat
or risk losing
..
ondition
known age an
n made by su
Year
egories
rol
ant Tanks
nalysis
200 Controlle
am to mitigat
of investing
ecurity of sup
– Not applic
re gas has dis
With licence
Considered
thing’ is not v
plans to keep
mplementatio
ion over a lon
te and spares
ticality - With
tegories
gas to large
nd condition,
uitable subjec
Critic
M
V
ers are obsol
te these risks
in these asse
pply;
cable;
stinctive sme
obligations a
d
viable option,
p the system
on
nger period h
s are not ava
h Investment
Cr
parts of the N
, the assessm
ct matter exp
cality Index
Low
Medium
High
ery High
lete, it is critic
s.
ets are as foll
ell; and
and GSMR.
, this equipm
s operationa
has been con
ilable this is n
riticality Index
Network both
ment of useab
erts in determ
Asset distributio
HI1 HI2
4
cal to the safe
ows:
ent will fail at
l.
nsidered, but
not considere
Asset distribut
h are major sa
ble spares an
mining the pr
on based on est
at 31 March
Asset health
2 HI3
ety that these
t some point
discounted a
ed practical fo
tion based on es
at 31 Marc
Asset healt
Expected
51
afety issues w
nd available s
oposed prog
timated asset he
h 2011
h index
HI4
20
e assets are
and NGN mu
as the existin
or these sma
stimated asset h
ch 2021
th index
d (50%)
which is
specialist
gram.
ealth index
HI5
replaced
ust be
g
all
health index
22 T
O
Asset He
22 T
O
8.5 The repla
8.6 This is a
52
Telemetry & Con
Offtakes - Odour
ealth and Crit
Asset ca
Telemetry & Con
Offtakes - Odour
Selectionacement of t
Innovatiovery speciali
ntrol
rant Tanks
ticality – With
ategories
ntrol
rant Tanks
n Criteria he equipmen
on ist market an
hout Investm
C
nt has been p
d only one m
Low
Medium
High
Very High
ent
Criticality Index
Low
Medium
High
Very High
phased based
manufacturer
HI1
24
Asset dist
HI1
d on immedia
is available.
HI2 HI3
ribution based o
index at 31 M
Asset Hea
Expecte
HI2 HI3
4
ate obsolesce
3 HI4
on estimated ass
March 2021
alth Index
d (50%)
3 HI4
ence.
HI5
set health
HI5
20
A19A
9.1 Within th
network
The Carc
required
Clay Flat
in West C
in 2016 w
site by 2
propose
2009
High p
Figure 9
9.2
a) Curre
The Carc
revalidat
The Clay
subject t
full revali
Figure 9
Consequ
The Clay
maintain
assets fa
Other co
• Lo
A-9: High
The Speche RIIO-GD1
. There are o
croft site is n
.
tts supplies 3
Cumbria it is
with a risk th
25% creating
ed that additio
9/10 Prices £m
ressure storage
strategy
.1: RIIO-GD1 Hi
Justificati
ent price co
croft vessels
tion costs are
y Flatts vesse
to stress crac
idation in 201
.2: Clay Flats HP
uence of Failu
y Flatts HP st
ned in West C
ail.
onsequences
oss of life;
h Pressu
ific Requiperiod NGN
nly two HP s
o longer requ
39,000 scm o
critical to sec
at the vessel
a security of
onal line pack
13/14
0.0
gh pressure Sto
ion for In
ontrol run
will be no lon
e c.£400k for
els are 44 yea
ck corrosion.
16. The estim
P storage site
ure
torage vessel
Cumbria. The
s of failure inc
ure Stora
irement tproposes to
sites in the ne
uired and will
of usable stor
curity of supp
can no longe
f supply issue
k storage is c
14/15 15
0.2 6
orage Strategy E
vestment
rates
nger required
r the Carcroft
ars old and h
Vessel 2 has
mated revalida
ls are a very
cost of re-es
clude:
age
throughouremove all H
etwork.
be decomm
rage. Due its
ply. Vessel 2
er be used. T
e during peak
constructed t
5/16 16/17
6.0 0.1
Expenditure
t
d. The site req
t vessels alon
ave previous
s a known de
ation costs a
high critical s
stablishing cu
ut RIIO-GDHigh Pressure
missioned in 2
location, on
with known
This will reduc
k demand co
o facilitate th
17/18
0.0
quires a full re
ne which will t
sly held town
efect which re
re c.£880k fo
site to ensure
ustomer supp
D1 e (HP) storage
2013 before a
the extremity
internal flaws
ce the storag
nditions if no
e removal of
18/19 19/2
0.0 0.0
evalidation in
then be remo
gas and ther
educes its cy
or the Clay Fl
e customer su
ply is significa
53
e vessels from
a full revalidat
y of a supply
s requires rev
ge capability o
ot addressed.
the Clay Flat
20 20/21
0 0.0
n 2013. The e
oved during 2
refore could b
ycle life and re
atts vessels.
upplies are
ant should th
m the
tion is
system
validation
of the
It is
tts site.
TOTAL
6.4
estimated
2013.
be
equires a
ese
• Si
• Si
• Re
• Re
Conditio
HP vess
• An
Pe
• D
in
The Con
• D
m
• D
an
• Pr
to
NGN ma
IGE/SR/
internal p
requires
• Ta
• Ta
fu
• An
GL Nobl
Clay Flat
Although
appropri
pressure
simple c
The prev
review p
flaws ass
experien
2016 du
inspectio
cap rath
There is
therefore
flaws.
Loss of v
54
ignificant dam
ignificant disr
eputational im
eputational im
n Assessmen
els are maint
nnual externa
erson; and
uty based (20
spection.
ntrol of Major
emonstration
mitigation in th
evelopment a
nd
roduction of
onnes of natu
aintains its ga
14– Safety R
procedures N
:
ask A - Week
ask C – Quar
unctionality ch
nnual inspect
e have also c
tts vessels ar
h it may be co
iate within UK
e vessel acco
calendar base
vious vessel e
process it has
sociated with
nced up to 20
ue to 25% of t
ons and the l
er than fatigu
an obvious r
e cannot be r
vessel 2 will c
mage to prop
ruption to the
mpact on NG
mpact on the
nt
tained in serv
al visual inspe
0 year maxim
Accident Ha
n that all reas
he form of a S
and three yea
a Major Accid
ural gas.
asholders in li
Recommenda
NGN/PR/MAI
kly visual insp
rterly valve op
heck of water
tions under P
carried out in
re currently a
onsidered tha
K safety reco
ording to the
ed approach.
examinations
s been determ
h internal stiff
011 for vesse
the fatigue lif
ikelihood of t
ue cycle duty
risk that the re
re-commissio
create the fol
perty;
e local area;
GN; and
e UK gas sup
viceable cond
ection of vess
mum) externa
azards (COMA
sonable meas
Safety Report
arly testing of
dent Prevent
ine with the in
ations: High P
NT/4 – Maint
pection;
peration, inte
r deluge syst
PSSR.
dependent in
round 44 yea
at the 40 yea
mmendation
condition of t
s were undert
mined that sto
ening structu
el 2 has conc
fe having elap
the next inspe
y.
evalidation ex
oned. This ris
lowing issues
pply industry.
dition as per t
sels, associa
al visual exam
AH) Regulatio
sures have be
t;
f emergency
tion Policy (M
nstitution of G
Pressure Gas
tenance of H
rlock check,
tem; and
ntegrity review
ars old. They
ar period has
s, (since 199
the vessel an
taken during
orage vessel
ures. A recen
luded that it
psed at this t
ections for ve
xercise may p
sk is greater f
s:
the PSSR. Th
ated pipework
mination plus i
ons sites requ
een taken for
plans in conj
MAPP) for site
Gas Engineer
s: Part 1: Abo
High Pressure
earthing che
ws of the Cla
were design
now passed
93) to determ
nd the remain
the period 20
2 is the princ
t review of ac
is expected t
ime. Due to t
essels 1, 3 an
prove if a ves
for vessel 2 g
he regulations
k and structu
nternal inspe
uire:
r major accid
junction with
es containing
rs and Manag
ove Ground S
e Storage Inst
eck, ground m
ay Flats site in
ed with a 40
d, it has been
ine the rema
ning fatigue lif
001 to 2004.
cipal life limiti
ctual pressur
to require exa
the phasing o
nd 4 being dr
ssel is at the
given that has
s require:
ures by a Com
ection and ful
ent preventio
the Local Au
between 50
gement docu
Storage Vesse
tallations. Thi
movement ch
n July 2011. T
year fatigue
considered
ining life of a
fe rather than
Within the c
ng vessel du
re cycle coun
amination du
of previous ve
riven by the 2
end of its life
s identified int
mpetent
l NDT
on and
uthority;
and 200
ument
els and
is policy
heck,
The four
life.
given
n a
current
ue to
ts
ring
essel
20 year
and
ternal
• St
iss
• Re
w
• As
th
9.3 The prog
intervent
An assoc
costs es
revalidat
£1m.
The linep
efficiency
The “with
that broa
a) Othe
Do Noth
The netw
be non-c
Build Ne
This opti
site wou
enormou
Stakeho
and dela
coming o
risk wou
9.4 NGN are
option o
to the op
torage capac
sue in West C
emaining 3 v
would be signi
s the revalida
hree remainin
Cost Benegramme as p
tions and sign
ciated Opex
stimated at £0
tion or hydro
pack project
y outputs can
h investment
ad approach
er Options C
ing:
work conside
compliant wit
ew HP Storag
ion has been
ld have to be
us. Permissio
lder consulta
ays. As these
online could t
ld also remai
Innovatioe committed
f using an Ab
perating pres
city of the site
Cumbria duri
vessels would
ificantly reduc
ation period w
g vessels wo
efit Analyproposed rem
nificantly imp
efficiency sav
0.88m over R
tests should
is required b
n be delivere
t” option pres
to asset hea
Considered
ers a ‘do noth
th PSSR.
e Facility:
n discounted.
e built. The d
on to build a n
ation would h
vessels are a
therefore imp
in an issue.
on to innovation
bsorbed Natu
ssure of the s
e will be redu
ing the winte
d see an incre
ced; and
would be bro
ould be reduc
ysis moves risk, CO
proves securit
ving of c.£0.1
RIIO-GD1. Th
it be required
efore revalida
d.
sented is dire
alth now being
d
hing’ for the s
As the existi
ifficulties arou
new COMAH
ave to take p
aging assets
pact significa
n and as part
ural Gas stora
ite’s inlet pip
uced by 25%
r period;
ease in there
ught forward
ced or come
OMAH comp
ty of supply,
1m pa will be
his cost exclu
d, which cou
ation in 2016
ectly linked to
g pursued by
specific asset
ing site is crit
und gaining p
H site would h
place and this
the potentia
ntly the secu
of this invest
age solution.
eline.
therefore cre
cycling and t
d the likelihoo
to an end as
pliance, socie
benefiting ou
e delivered alo
udes any rem
uld push this o
commences
o our RIIO-GD
y NGN.
ts identified a
tical to the se
planning perm
have to be so
s could lead t
l risks for del
rity of supply
tment we hav
Unfortunatel
eating a majo
therefore the
od is that the
s similar type
etal risk, secu
ur customers
ong with tota
ediation requ
overall cost t
s to ensure o
D1 outputs, s
above is unac
ecurity of sup
mission for su
ought from th
to considerab
ays in the pro
y for West Cu
ve considered
ly this is now
55
or security of
e revalidation
remaining life
flaws could b
urity concerns
.
al vessel reva
uired, followin
o be in exces
ptimum cost
safety, reliabil
cceptable as
pply a comple
uch a site are
he HSE. Cons
ble public op
oject starting
umbria. The s
d an alternat
viewed unvia
supply
period
e of the
be found.
s, HSE
lidation
ng
ss of
t
ity and
it would
ete new
e
siderable
pposition
and
societal
ive
able due
A19A
10.1 The pref
‘PIGS’. T
Develop
these pip
informat
they pro
inspectio
Funding
of 6” pip
being ins
This proj
pipe wor
A list of p
relevant
been und
2009/10
£m
Install pig
facilities o
high pres
pipelines
Figure 1
Figure 10
10.2 Legislatio
Industry
collected
pipeline.
56
A-10: PIG
The Specferred method
The techniqu
ments within
pelines are in
ion of the pip
vide more de
on frequencie
is proposed
pelines to hav
spected to al
ject will requi
rk has also b
pipelines hav
sites will be a
dertaken, PIG
Prices 20
g traps
on 6"
ssure
0.
0.1: RIIO-GD1 I
0.2: PIG Trap an
Justification requires N
standards su
d from an ILI
It may help s
G Trap Fa
ific Requid of Conditio
e is called “In
ILI capabilitie
nspected exte
pelines CP sy
etailed data o
es by a risk b
to install ‘PIG
ve in line inspe
low for launc
ire procuring
een included
ve been analy
assessed for
G Traps can t
13 2014
.1 0.1
nstall pig traps f
nd Inspection PI
ion for InNGN to inspe
uch as IGE/T
is more accu
save money,
acilities
irement ton Monitoring
n Line Inspec
es now mean
ernally by car
ystem and co
on the conditi
based approa
G’ Traps on s
ections. PIG
ch and receiv
PIG Traps su
d in our expen
ysed to deter
their ability t
then be insta
2015
0.1
facilities on 6" hi
G
vestmentect pipelines p
TD/1 as well a
urate and can
by not havin
throughou pipelines is b
ction (ILI)”.
n that 6” pipe
rrying out ove
oating conditio
ion of the pip
ach in NGN’s
sites that hav
Traps are fac
ving PIGs.
uitable for 6”
nditure foreca
mine if they h
o have PIG T
alled.
2016
0.1
gh pressure pip
t periodically th
as the HSE its
n give NGN a
ng to over inv
ut RIIO-GDby using inte
elines are cap
er the line sur
on. ILI are pr
peline. The an
internal data
ve been ident
cilities attach
inspection to
asts.
have the corr
Traps installed
2017 201
0.1 0.1
elines
hrough either
self, recomm
a better unde
est on a pipe
D1 rnal inspectio
pable of havin
rveys which r
eferred to ex
nalysed data
abase.
ified as suitab
ed to the end
ools. The sub
rect flow rate
d. When all p
18 2019
1 0.1
r above groun
mend ILI wher
rstanding of t
eline.
on gauges kn
ng an ILI. Cur
really only giv
xternal inspec
is used to se
ble to allow a
d of the pipel
bsequent fittin
to ILI. Follow
preliminary wo
2020
0.1
nd surveys IL
re possible. D
the condition
nown as
rrently
ve
ctions, as
et
a number
ines
ngs and
wing this,
ork has
Total
1.2
LI.
Data
n of the
Figure 10
a) Curre
NGN has
number
Without
and coat
over acc
surveys
Addition
• D
• M
• G
• G
• M
• Ec
• Pi
• Pi
The data
Inspectio
feature d
• Ty
• O
• Ax
• C
• D
• Fe
0.3: Pig Trap ins
ent Run Ra
s not installed
of pipelines a
the ability to
ting surveys
cess and ofte
is very limited
al information
ata quality;
Metal Loss Fea
ouges & Den
irth Weld Ano
Metal Object R
ccentric Casi
ipeline Repai
ipeline Anom
a also include
on sheets are
description:
ype feature (e
Orientation;
xial length;
ircumferentia
epth – Peak;
eature Select
stallation
ates
d any PIG Tra
are unable to
inspect the p
at a maximum
en results in c
d.
n benefits are
atures;
nts;
omalies;
Report;
ing Report;
rs; and
malies.
es full details
e produced fo
e.g. Metal Lo
al width;
tion Rule;
aps on 6” pip
o be ILI due to
pipeline by IL
m of five year
compensation
e also provide
of any faults
or each of the
oss);
pelines in the
o insufficient
LI, NGN will ne
rs frequency.
n for damage
ed by ILI whic
and includes
e identified a
current GDP
flows.
eed to contin
. This involves
ed crops. The
ch include:
s in depth ana
nd reportable
PCR1 price c
nue to carry o
s negotiation
e information
alysis of the f
e features inc
57
ontrol period
out over the l
ns with land o
received from
faults reporte
cluding the fo
. A
ine CP
owners
m CP
ed.
ollowing
• N
• Ab
• C
• Th
ne
• C
an
• Fu
an
b) Cons
When H
custome
ILI allows
continue
c) Cond
6” pipelin
indicates
of weld d
Figure 10
It is prop
10.4 abo
to the cu
the pipe
for custo
10.3 It is estim
cost for
The key
have for
assets g
0
100
200
300
400
500
600
700
800
Leng
th (km
)
58
ominal Pipe w
bsolute Dista
omments;
he Feature Lo
earby Girth W
ontour plots
nd
ull Pipeline lis
nalysis.
snsequence
P pipelines fa
ers and the as
s us to gain d
ed fitness for
dition Asses
nes currently
s that the pip
defects which
0.4: Deterioratio
posed that wi
ove. ILI will he
urrent limited
line with prov
omers.
Cost Benemated that to
the inspectio
benefits of th
these pipelin
going forward
0
0
0
0
0
0
0
0
0
HI1
wall thicknes
ance from Lau
ocation is als
Welds;
and depth ba
stings are incl
e of Failure
ail the conseq
ssociated ris
data that ena
purpose.
ssment
y have above
peline is prote
h we can get
on Rates
ithout investm
elp us preven
data we get
ven results le
efit Analyo install a PIG
on alone is c.£
he programm
nes and there
ds.
HI2
s for spool;
unch;
so quoted wit
ased Histogr
luded showin
e
quences are
k to life and p
ables the reva
ground surve
ected from co
t from ILI data
ment HP pipe
nt deterioratio
from over th
ading to exte
ysis Trap at a sit
£35K for a 15
me are improv
efore a more
HI3
th reference t
rams of each
ng features th
significant in
property.
alidation of th
eys to monito
orrosion by ha
a.
elines could d
on rates by b
e line inspect
ended life of t
te will cost ap
5km pipeline
ved inspectio
informed app
HI4
2013
to Strip Map
reported fea
hat have not
terms of loss
e condition o
or the level of
aving effectiv
deteriorate at
etter analysis
tions. ILI will
the asset, wh
pproximately
length.
on quality and
proach to mo
4 HI
Without Investm
Number and
ature are prov
been reporte
s of supply to
of the pipeline
f CP on the p
ve CP, but no
t the level sho
s of the data
further enabl
hich clearly re
c.£0.1m. The
d the improve
onitoring and
I5
ment
d references s
vided to aid a
ed but may ai
o thousands o
es and prove
pipeline. This
o indication o
own in the Fig
provided com
le the revalida
epresents bes
e associated
ement in data
managing th
such as
analysis;
id future
of
e their
f dents
gure
mpared
ation of
st value
Opex
a we
hese
Investme
Currently
identify t
a) Othe
Do Noth
It is a req
NGN not
pipeline
10.4 Currently
these ins
inspectio
10.5 ILI is a b
to prope
leakage
mapping
developm
ent for remed
y any potenti
the problem w
er Options C
ing:
quirement to
t complying w
failure which
Selectiony all HP pipel
spections has
on method of
Innovatioroad term us
el itself. It is p
capabilities. T
g capabilities
ments progre
dial work can
ally issue disc
which incurs
Considered
inspect and
with current l
could result
n Criteria ines above 6
s been used
f Industry exp
on sed for using
roposed that
There is pote
and strain an
ess we will ha
then be focu
covered thro
additional co
d
maintain our
egislation. Al
in loss of sup
6” have ILI in
for investme
perts and the
an intelligent
t initially the P
ential in the fu
nalysis. Some
ave the facilit
used on a sp
ough above g
osts.
r pipelines, th
so pipeline d
pply, loss of l
NGN’s netwo
nt decisions
e HSE.
t PIG to trave
PIG will be eq
uture to utilise
e of these are
ies to utilise t
ecific area w
round survey
us a ‘do noth
defects could
ife, damage t
ork. The data
for remedial w
el the length o
quipped with
e new techno
e not proven
them as they
here we disc
ys requires ex
hing’ approac
go unnoticed
to property a
a that has bee
work. ILI is th
of the pipeline
geometry an
ologies such
technologies
come online
59
cover an issue
xtra assessm
ch would res
d and result i
and such like
en received f
he preferred
e using the g
nd magnetic f
as ultrasonic
s as yet but a
e.
e.
ments to
sult in
in
.
from
as flow
flux
c,
as
A19A
11.1 Within th
regards
Over the
was the
£1 billion
NGN car
banks. W
Figure 1
£m 20
River b
Figure 1
11.2 Many pip
submerg
regularly
risk of da
Increasin
pipelines
Figure 1
pipeline
denting
damage
Figure 1
60
A-11: Riv
The Speche RIIO-GD1
to river bank
e last 45 year
worst for 270
n pa.
rry out routin
We have seen
1.1 below sh
09/10 prices
bank erosion
1.1: RIIO-GD1R
Justificatipelines cross
ged beneath
y. These cond
amage and in
ng changes t
s that lie with
1.2 below sh
was left unco
into the pipel
d HP pipeline
1.2: Pipeline unc
ver Bank
ific Requiprocess, NG
erosion.
s there is evid
0 years in so
e inspections
n an increase
hows our anti
13/14 1
0.3
River Bank Erosio
ion for Ins a watercour
the river. Cha
ditions are ex
nterruption to
o the environ
in them. We
hows what wa
overed by the
line. The stre
e.
covered by flood
k Erosion
irement tGN will be req
dence that th
me areas in 2
s of HP pipel
e in river bank
cipated spen
4/15 15/16
0.3 0.3
on Expenditure
vestmentrse on their ro
anges in clim
xposing our p
o the supply o
nment have s
therefore nee
as once a dry
e force of the
am was dive
ding
n
throughouquired to inve
here have bee
2009, like Cu
ine river cros
k erosion ove
nd over the R
6 16/17
0.3
t oute. Rather
matic conditio
pipelines furth
our customer
shown a chan
ed to invest t
y fell-spring fo
e water, which
rted in order
ut RIIO-GDst in the effec
en more extr
umbria, flood
sings to ensu
er the last few
RIIO-GD1 per
17/18 18
0.3 0
than building
ns are affecti
her to the elem
rs.
nge in the rive
o counteract
ollowing the
h in turn carr
to allow repa
D1 cts of environ
reme rainfall e
damage now
ure stability o
w years.
iod.
8/19 19/20
0.3 0.3
g an over-cro
ng these cro
ments, theref
er bed and b
t the impact o
extreme flood
ied large bou
airs to be car
nment chang
events. UK flo
w costs the U
of river bed an
20/21
0.3
ssing, they a
ossings more
fore increasin
anks that pro
of erosion.
ds in Cumbri
ulders that ca
rried out to th
e with
ooding
UK about
nd
Total
2.3
are
ng the
otect our
a. The
aused
he
a) Curre
River Cro
Lazonby
Wyke Be
Woringto
Figure 1
There ha
scoped a
evidence
There ar
frequenc
most effi
Consequ
River ero
pipelines
pipeline.
• Lo
• Lo
• D
• N
Conditio
Pipeline
determin
and to d
results o
Figure 1
ent Run Ra
ossing Erosion
Location
, Cumbria
eck, West Yorks
on, Cumbria
1.3: GDPCR 1 E
ave been a fu
and priced a
es our anticip
re over 60 HP
cy. Some of t
icient form of
uence of Failu
osion can rem
s span within
Failure of a p
oss of Supply
oss of Life;
estruction of
on Complian
n Assessmen
river crossing
ne changes o
determine the
of these surve
1.4: River Bank
ates
n - Asset Hea
Expenditure
urther three m
s schemes. T
pated spend o
P river crossin
the recognise
f ongoing ma
ure
move the surr
a river, great
pipeline can r
y;
Property; an
nce with Regu
nt
gs are subjec
of the river be
e precise loca
eys are used
Inspection
alth
Name of R
Rive Ede
Halifax
River Derw
major erosion
The historical
over the RIIO
ngs within ou
ed remedial a
aintenance fo
rounding eart
t stresses are
result in:
nd
ulation.
ct to inspectio
ed from the o
ation of the pi
to assess the
River
en
went
issues identi
l spend abov
O-GD1 period
ur network alo
actions consis
or some of the
th that gives
e placed upo
on by engine
riginal which
ipeline using
e criteria of p
Cost of Reme
£0.2
£0.0
£0.
ified in 2011/
ve coupled w
d.
one and thes
st of more fre
ese crossings
our pipelines
on the pipeline
ering divers w
may adverse
topographica
protection app
edial Work £m
26m
05m
3m
/12 which are
ith those iden
se are inspect
equent inspec
s.
s protection fr
e which can
who carry ou
ely affect the
al and hydrog
plied or requi
61
Yea
200
201
201
e currently be
ntified this ye
ted on a risk
ctions which
rom damage
result in failur
ut inspections
condition of
graphic surve
ired.
ar
08
10
11
eing
ear,
based
are the
e. When
re of the
s to
the pipe
eys. The
Figure 1
b) Othe
Do Noth
The optio
they are
pipeline
welds an
Divert Pi
Pipeline
the main
custome
Benefits
The ben
• En
N
of
• C
• Sa
ar
• C
Sy
11.3 The lates
ensure th
62
1.5: Screenshot
er Options
ing:
on to ‘do not
laid in. When
is allowed to
nd ultimately,
ipeline:
diversions ar
n reason for c
ers.
/Outputs:
efits/outputs
nvironmental
o loss of con
f Environmen
ustomer – co
afety – Risk m
rea of the net
ompliance –
ystems Safet
Innovatiost technology
he least disru
t of Database us
Considered
thing’ is not a
n that environ
span in the f
failure could
re very costly
choosing the
of investing
– No disrupt
ntainment from
nt Agency.
ontinual secu
mitigation and
twork, in both
Pipelines mu
ty Regulation
on: y in materials
uption to wild
sed to Assess C
d
a viable optio
nment chang
fast flow of th
d occur.
y and are only
option above
in these asse
tion to the en
m pipeline fa
rity of supply
d reduction o
h rural and ur
ust be compli
s (PSSR) 200
and method
dlife, flora and
riteria for Inspec
on. Pipelines a
es, pipelines
he river, incre
y a viable opt
e and provide
ets are as foll
nvironment fro
ilure. River ba
y across the n
of major accid
rban location
iant with Pipe
00.
ds are used a
d fauna occur
ction Frequency
are protected
become vuln
eased stresse
tion when oth
es the most e
ows:
om construct
anks assesse
network.
dent hazard p
ns.
eline Safety R
and agreed w
rs.
& Maintenance
d by the surro
nerable to da
es are placed
her measures
efficient solut
tion of a new
ed and reinst
pipelines acro
Regulations 1
with Environm
Regime:
ounding earth
amage or if th
d on the pipe
s will not wor
tion for our
w pipeline in th
ated with ag
oss the geog
996 and Pre
ent Agencies
h that
he
and its
k. This is
he future.
reement
graphical
essure
s to
NGN are
assist in
Figure 1
e working wit
determining
1.6: Flood plains
th Environme
at risk river c
s linked to datab
nt Agency to
crossings as
base
o apply known
shown below
n data of floo
w in Figure 11
od plains with
1.6.
63
hin a databasse to
A19A
12.1 Within th
parties. T
data has
phasing
RIIO-GD
2009/10
Compen
Payment
Figure 1
12.2 Pipeline
frequent
landown
quarries/
solution
For valid
• In
• D
• Pa
• A
a) Curre
Historic
claims u
Consequ
HP Pipe
failure of
happen.
so they h
ensure th
How hav
NGN’s P
involves
with the
this stag
Historica
solution
The high
64
A-12: Co
The Speche RIIO-GD1p
This item is u
s been used t
throughout t
D1.
Prices £m
sation
ts
2.1: RIIO-GD1 C
Justificatieasement de
ly has to relo
ner/developer
/mines etc. A
is found, this
d claims whic
stall Barrier p
ivert the pipe
ay compensa
combination
ent Run Ra
data and cos
nder review i
uence of Failu
lines are critic
f a HP Pipelin
The paymen
have no mate
hird party wo
ve we assess
Property Func
examining th
assistance o
ge discussion
al costs are u
is chosen.
h level proces
mpensa
ific Requiperiod NGN h
usually assoc
to establish t
the plan perio
13/14 14/1
1.0 1.0
Compensation P
ion for Ineeds often co
ocate the pipe
r. Claims of th
An assessme
s is detailed in
h cannot be
protection on
eline;
ation; and
n of all of the
ates
st information
nclude four l
ure
cal assets an
ne would hav
nt of compen
erial impacts
orks are risk a
ed the value
ction with the
he deed and
of mineral ext
s could resul
used to estab
ss for the ass
ation Pay
irement thas made a p
iated with HP
he future valu
od is shown b
15 15/16
0 1.0
Payments Expen
vestmentontain “lift and
eline or pay a
his nature ca
nt is underta
n the flow ch
repudiated th
n the pipeline;
above.
n has been us
imestone qua
nd essential fo
ve severe safe
sation will res
on the pipeli
assessed so
e of these cla
e support of o
establishing
raction, or ho
lt in the claim
blish the cost
sessment is d
yments
throughouprovision of £
P Pipelines la
ue of compen
below in Figu
16/17
1.0
nditure
t d shift” and/o
a loss of deve
an be received
ken to validat
art shown in
he outcome o
;
sed to estima
arries, one de
or the safe su
ety and gas s
sult in develo
ne. As part o
the integrity o
ims?
our Legal Dep
if NGN has a
ousing develo
m progressing
of anticipate
detailed below
ut RIIO-GD£8.4m for com
aid in private l
nsation paym
ure 12.1 but h
17/18 18
1.0 1
or loss of dev
elopment com
d from a varie
te the claim a
Figure 12.2 o
of this assess
ate the future
eveloper and
upply of gas
supply impac
opments or m
of the assessm
of NGN’s HP
partment rev
a case to answ
opment expe
g, reduced in
d diversion w
w in Figure 12
D1 mpensation p
and under ea
ments. Details
has been stra
8/19 19/20
.0 1.0
velopment cla
mpensation p
ety of source
and ensure th
overleaf.
sment could
e liabilities in t
one wind far
under all dem
cts and NGN
mineral extrac
ment full con
P Pipelines ar
view each cla
wer. The nex
erts to then va
financial imp
work. The low
2.2.
payments to
asement. His
s of expenditu
aight-lined ac
20/21
1.0
auses. NGN
payment to th
es; builders/d
he minimum
be:
this area. Cur
rm.
mand conditio
cannot allow
ctions being r
sideration is
re not compro
im. The first s
xt stage woul
alidate the cla
pact or cance
west cost stab
third
storic
ure
cross
Total
8.2
he
eveloper,
cost
rrent
ons. The
w this to
restricted
given to
omised.
stage
d be
aim. At
elled.
ble
Figure 12
b) Cost
The asse
work is m
c) Othe
The optio
compen
12.3 As above
12.4 At all sta
2.2: Process for
t Benefit An
essment is un
mandatory an
er Options C
ons are estab
sation is alwa
Selectione minimum c
Innovatioages within th
r Evaluating Claim
nalysis
ndertaken to
nd a legal req
Considered
blished at the
ays assessed
n Criteria cost solution
on he assessmen
ms
establish min
quirement wh
d
e assessmen
d against the
is selected w
nt stage full c
nimum cost s
hich NGN has
t stage and t
lowest cost
where viable.
consideration
solution that
s to comply w
the minimum
solution to be
n will be given
is acceptable
with.
cost solution
e given cons
n to using inn
65
e to all parties
n is chosen. P
ideration.
novative solut
s. The
Paying
tions.
A19A
13.1 Sleeves
construc
sleeves.
construc
Through
investme
2009/10
Sleeves
Figure 1
a) Nitro
Investme
pressure
will allow
best pos
There wi
estimate
b) Non
Investme
appropri
vacant s
approxim
13.2 NGN is c
procedu
risk from
across th
vulnerab
section o
Nitrogen
maintena
explored
leak and
Non nitro
protect t
a) Curre
Nitrogen
There ar
undertak
66
A-13: Sle
The Spechave been us
ction purpose
Sleeves have
ction, the pre
out the RIIO-
ent is split be
Prices £m
3.1: RIIO-GD1 S
ogen Sleev
ent is being u
e to be monit
w us to determ
ssible conditio
ill also be inve
ed to be 12 s
-Nitrogen S
ent is being ta
iate remedial
sleeves and re
mately 80 slee
Justificaticurrently wor
re for sleeves
m these asset
he industry. I
ble locations s
of pipe.
n sleeves not
ance of a pos
d. The nitroge
d water and o
ogen sleeves
the parent pip
ent Run Ra
n Sleeves
re 96 nitrogen
ken to remed
eeves
ific Requised on pipeli
es. The main
e proved to b
ference now
-GD1 period,
etween nitrog
13/14 14/1
0.3 0.2
Sleeves Expendi
ves
used to instal
ored constan
mine any dec
on.
estment to u
leeves, reflec
Sleeves
argeted at ac
work to upg
e-wrapping. T
eves in total.
ion for Inrking in collab
s. This ‘best
s. Currently t
t is recognise
such as road
holding their
sitive nitrogen
en provides a
oxygen replac
s require a fill
pe and the sl
ates
n filled sleeve
diate nitrogen
irement tnes where th
types of slee
be problemat
being thicke
NGN has id
en and non-n
15 15/16
2 0.2
iture
l remote mon
ntly and alarm
cay and react
pgrade nitrog
cting historica
ccurately iden
rade them. T
This is estima
vestmentboration with
practice’ pro
there is no cle
ed that sleeve
and rail cros
r charge more
n pressure w
an inert atmos
ce the nitroge
of some con
eeve. It is oft
es in the netw
sleeves. £10
throughouhey cross ma
eve in use are
tic to maintain
er wall pipe.
entified an in
nitrogen sleev
16/17
0.2
nitoring on nit
med when the
t accordingly
gen sleeves t
al trends.
ntifying the co
This will involv
ated to cost c
t other networ
ocedure is new
ear managem
es are import
ssings and th
e frequent ch
within the ann
sphere where
en, corrosion
nductive mate
ten difficult to
work. In the la
00K was inve
ut RIIO-GDajor obstacles
e nitrogen fille
n and are ge
vestment of £
ves.
17/18 18
0.2 0
trogen sleeve
e pressure ch
to ensure th
that are ident
ondition of sle
ve excavating
c.£20K per s
rks to produc
w to the indu
ment procedu
tant for prote
hey are impor
hecks need to
ulus, or altern
e corrosion c
can occur a
erial and non-
o identify issu
ast 2 years pr
ested in 2010
D1 s such as roa
ed sleeves or
nerally not us
£1.9m for LT
8/19 19/20
0.2 0.2
es. This will a
hanges from
at they are m
tified, requirin
eeves and th
g to reveal the
sleeve (histori
ce a uniform
ustry and its a
ure for non-n
ecting mains a
rtant for prolo
o be made en
native solutio
cannot take p
nd is very diff
-pipe contac
ues with these
rogramme of
0 and £400K
ads, rails etc.
r non-nitrogen
sed in moder
TS sleeves. T
20/21
0.2
allow nitrogen
set paramete
maintained in
ng remediatio
hen implemen
e sleeves, gro
cal cost), wit
managemen
aim is to redu
itrogen sleev
and pipelines
onging the life
nsuring the
ons need to b
place. If nitrog
ficult to ident
t to allow CP
e.
works was
in 2011 repla
or for
n filled
rn day
his
Total
1.9
n
ers. This
their
on. This is
nting
outing of
h
t
uce the
ves
s at
e of this
be
gen seals
tify.
P to
acing
these sle
Noble De
period.
Non-Nitr
There ar
sleeves,
Going fo
determin
Consequ
It is unlik
of supply
particula
pipe is m
Conditio
Nitrogen
NGN co
and prov
ensure th
NGN/PM
Non-Nitr
A comm
UKOPA.
gathering
condition
the route
Sleeves
rates wa
Figure 13
0
100
200
300
400
500
600
700
800
Leng
th (km
)eeves and up
enton. Ongo
rogen Sleeve
re 526 other s
other than w
orward, it is in
ne their cond
uence of Failu
kely that failur
y, however if
arly the rate o
more vulnerab
n Assessmen
n Sleeves
mmissioned
vide remedial
hey are holdi
M/MAINT5 in
rogen Sleeve
mon sleeve ma
Part of the in
g more inform
n of sleeves.
e of the pipel
are expected
as predicted b
3.2: Deterioratio
0
0
0
0
0
0
0
0
0
HI1
pgrading the s
ing investme
es
sleeves within
when a specif
ntended to gr
ition.
ure
re of a sleeve
water were a
of corrosion o
ble to third pa
nt
technical exp
l actions. The
ng pressure.
accordance
es
anagement p
nvestment no
mation on ou
Currently, ILI
ine incorpora
d to deteriora
based on his
on Rates
HI2
sleeves to a s
nt will be for
n the network
fic issue arise
rout more sle
e will result in
able to enter
on the pipeline
arty damage,
perts GL Nob
ese actions w
Nitrogen sle
with IGE/TD/
procedure is u
ow proposed
r sleeve popu
Is and CIPs s
ating the sleev
ate at a level s
torical data a
HI3
suitable stan
any issues th
k. There is no
es, this will th
eeves to reval
failure of the
the sleeve, it
e, as the wat
, particularly a
ble Denton to
were then com
eeves are also
/1.
under develo
d will be used
ulation. This w
surveys allow
ve.
similar to pipe
as shown bel
HI4
2013
dard, followin
hat are expec
o specific set
en be repaire
lidate them a
e carrier pipe
t could accele
ter becomes
at rail and roa
o analyse all n
mpleted and
o maintained
opment as pa
d for applying
will enable NG
w us to determ
elines. An es
ow without in
4 HI
Without Invest
ng an indepe
cted to arise o
t of works for
ed as part of
and excavatin
and as such
erate deterio
trapped in th
ad crossings
nitrogen sleev
the sleeves a
in accordanc
art of NGN’s i
this manage
GN to accura
mine if there a
timation of fu
nvestment.
5
tment
67
endent review
over the RIIO
r non-nitroge
Opex expend
ng more sleev
there will be
ration rates,
he sleeve. Als
.
ves in the net
are monitored
ce with NGN
involvement w
ement proced
ately assess t
are any issue
uture deterior
w by GL
O-GD1
n
diture.
ves to
no loss
so the
twork
d to
Policy
with
dure and
the
es along
ration
b) Othe
Do Noth
Nitrogen
A ‘do no
by the n
protecte
Non-Nitr
It has be
pipeline
Figure 13
Grout or
parent p
corrosion
Replace
Replace
very exp
offering b
13.3 NGN hav
• Th
op
ca
• Re
pr
ra
pr
Remote
reports i
antenna)
68
er Options
ing:
n Sleeves
othing’ appro
itrogen is imp
ed by CP and
rogen Sleeve
een noted tha
as water acc
3.3: Pipe Sleeve
r other condu
pipe from corr
n.
Pipeline Sect
the section o
pensive and im
best value fo
Innovatiove considere
here are som
ption is enviro
arrier pipe.
emote monit
ressure in sle
ate of decay s
rotected.
monitoring m
mmediately i
) using the G
Considered
ach is consid
portant to pro
d relies on the
es
at if left to the
celerates corr
e Configuration
uctive materia
rosion. Any m
tion:
of pipe with t
mpractical fo
r money and
on ed other optio
me alternatives
onmentally fr
oring is a new
eeves, which
so that nitrog
measures the
f an alarm th
SM network
d
dered unacce
otect the pipe
e inert atmosp
eir own device
rosion and inc
al is required
metallic short
thick walled p
r a large num
efficiency fo
ons for upgra
s to grouting
iendly and it
w technology
gives confide
gen fill can be
e sleeve press
reshold is ex
and is install
eptable for nit
eline from co
phere to prev
es, some sle
creases dete
within the an
between pip
pipe, to prote
mber of sleeve
r our custom
ding sleeves
including ‘ge
has to be pro
y to the indus
ence that the
e maintained.
sure automat
ceeded. It co
ed in the sam
trogen sleeve
rrosion. This
vent corrosio
eves can bec
erioration of th
nnulus to ens
pe and sleeve
ect it from thir
es and this is
mers.
, these includ
els’ that can
oven that will
stry, allowing
e carrier pipe
This will ens
tically, checks
ommunicates
me way, simp
es. The inert
section of th
n.
come more o
he carrier pip
ure that CP c
e can leave th
rd party dam
s why we cho
de:
be used to fil
prevent dete
us to consta
is protected
sure our asse
s that it is wit
s (via either an
ply requiring a
atmosphere
he pipe will no
of a hindrance
pe.
can protect t
he pipe vulne
age. This opt
ose the option
ll some sleev
erioration of t
antly monitor
and determin
ts are better
thin specifica
n internal or e
a mobile pho
created
ot be
e to the
he
rable to
tion is
ns stated
ves. This
the
the
nes the
ation and
external
ne.
Figure 133.4: Example of the front screenn used for monittoring nitrogen ppressures in sleeeves.
69
A19A
14.1 HP Pipe
believe it
HP diver
shown b
requests
payment
low cost
2009/10
LTS Pipe
Replacem
Figure 1
14.2 NGN ma
• If
pi
de
• W
re
• W
de
ho
Th
in
av
m
HP Pipe
assessm
pipeline,
a) Curre
Historic
dating b
under re
Consequ
HP Pipe
failure of
happen.
so they h
ensure th
How hav
70
A-14: LTS
The Speclines are usu
t requires £10
rsion per yea
below in Figur
s and ensures
ts or physica
t risk mitigatio
Prices £m
eline
ment
4.1: RIIO-GD1 L
Justificatiay have to rel
the easemen
peline by NG
evelopment b
Where the pipe
easons e.g. la
Where Plannin
evelopment t
ousing (high r
his may chan
TD/1 the pip
vailable in this
main driver for
lines are critic
ment is undert
pay compen
ent Run Ra
data and cos
ack to 2001
eview include
uence of Failu
lines are critic
f a HP Pipelin
The paymen
have no mate
hird party wo
ve we assess
S Pipelin
ific Requially construct
0.9m to enab
r and a majo
re 14.1. NGN
s that all opti
l diversion, ris
on such as co
13/14 14/1
0.8 0.8
LTS Pipeline Rep
ion for Inlocate and fu
nt deed conta
GN. These cla
by the land ow
eline cannot
andslips.
ng Advise for
to proceed w
rise) which in
nge the class
peline design
s scenario wo
r identifying o
cal assets an
taken ensure
nsation or a c
ates
st information
have been us
four limeston
ure
cal assets an
ne would hav
nt of compen
erial impacts
orks are risk a
ed the value
ne Repla
irement tted in private
ble the const
r scheme at
N take a very
ons are explo
sks assessm
oncrete slab
15 15/16
8 0.9
placement Expe
vestmentund High Pres
ains clauses w
auses are kno
wner for hou
be operated
Developmen
which may co
ncreases the s
ification from
code. HP Pi
ould be at the
one large HP
nd essential fo
e the minimum
combination.
n has been us
sed this infor
ne quarries, o
nd essential fo
ve severe safe
sation will res
on the pipeli
assessed so
e of these cla
acement
throughoue land under e
ruction of HP
mid plan poin
proactive ap
ored with the
ments are alwa
protection ca
16/17
5.3
enditure
t ssure Diversio
which if invok
own as ‘lift an
sing or miner
because of s
nts near High
nflict with IGE
societal risk a
m Suburban to
pelines shou
e worst to re
diversion mid
or the safe su
m cost solutio
sed to estima
rmation is det
one develope
or the safe su
ety and gas s
sult in develo
ne. As part o
the integrity o
ims?
ut RIIO-GDeasement. W
P Pipeline Div
nt. Detail of th
pproach when
e land owner
ays undertak
an be installe
17/18 18
0.8 0
ons in the fol
ked would en
nd shift claus
ral extraction
safety issues
Pressure Ins
E/TD/1. This
and may resu
o Town enviro
ld not be con
locate or dow
d-term in the
upply of gas
on is found. T
ate the future
tailed in Figur
er and one w
upply of gas
supply impac
opments or m
of the assessm
of NGN’s HP
D1 Within the RIIO
versions. This
he expenditu
n negotiating
to mitigate e
king as the firs
ed.
8/19 19/20
0.8 0.8
lowing circum
nforce the rel
ses.’ This is u
n from a quar
. This could b
stallations (PA
is usually con
ult in the pipe
onment class
nstructed in T
wn-rate the p
RIIO-GD1 pl
under all dem
This could be
e liabilities in t
re 14.2 below
ind farm.
under all dem
cts and NGN
mineral extrac
ment full con
P Pipelines ar
O-GD1 period
s equates to o
ure and phasi
LTS diversio
ither compen
st priority to i
20/21
0.8
mstances:
ocation of th
usually promp
ry owner.
be for a num
ADHI) allows
nfined to high
eline being re
sification as d
T areas. The
pipeline. This
lan.
mand conditio
e to divert the
this area. Sch
w. Current cla
mand conditio
cannot allow
ctions being r
sideration is
re not compro
d NGN
one small
ing are
on
nsation
identify if
Total
10.9
e
pted by
ber of
a
h density
elocated.
detailed
options
is the
ons. An
e
hemes
aims
ons. The
w this to
restricted
given to
omised.
NGN’s P
involves
with the
this stag
Historica
solution
When th
instance
Figure 14
An asses
detailed
base cos
NGN exp
impacts
density m
Figure 14
Property Func
examining th
assistance o
ge discussion
al costs are u
is chosen.
he scheme is
es at the earlie
4.2 below.
ssment of the
below in Figu
st for the plan
pects one lar
(landslips/riv
multi-occupa
4.2: Historic HP
ction with the
he deed and
of mineral ext
s could resul
used to estab
defined follow
er stages cos
e cost per an
ure 14.2. The
n period.
rge scheme t
ver bed erosio
ancy developm
diversions
e support of o
establishing
raction, or ho
lt in the claim
blish the cost
wing detailed
st curve data
nnum has bee
e major schem
to be required
on) or building
ments near H
our Legal Dep
if NGN has a
ousing develo
m progressing
of anticipate
d assessment
a may be used
en generated
mes have be
d during the
g encroachm
HP Pipelines.
partment rev
a case to answ
opment expe
g, reduced in
d diversion w
t, specific co
d. A print off
d by examinin
een removed
RIIO-GD1 pla
ment TD/1 or
view each cla
wer. The nex
erts to then va
financial imp
work. The low
osts are prepa
of a generic
ng past schem
to establish t
an period from
PADHI confli
71
im. The first s
xt stage woul
alidate the cla
pact or cance
west cost stab
ared in some
scheme is sh
mes which ar
the minimum
m either exte
cts in respec
stage
d be to
aim. At
elled.
ble
e
hown in
re
annual
ernal
ct of high
Figure 14
b) Cost
The asse
legal req
propose
c) Othe
The optio
are repu
aforeme
14.3 As above
14.4 If a diver
appropri
near to t
72
4.3: Cost Curve
t Benefit An
essment is un
quirement wh
ed i.e. upsizin
er Options C
ons are estab
diate (if a los
ntioned.
Selectione minimum c
Innovatiorsion option is
iate to innova
the proposed
Generic Sample
nalysis (CB
ndertaken to
ich NGN has
g then a full d
Considered
blished at the
s claim), com
n Criteria cost solution
on s deemed the
ation in respe
d diversion ro
e Print out
A)
establish the
s to comply w
detailed CBA
d
e assessmen
mpensate, ins
is selected.
e minimum c
ect of constru
utes.
e minimum co
with. Where a
A is prepared
t stage and t
stall barrier pr
cost solution t
uction method
ost solution.
an enhancem
prior to Busi
the minimum
rotection, div
then conside
ds and poten
The work is m
ent to the mi
ness Case a
cost solution
vert or a comb
eration will be
ntial for new B
mandatory an
inimum cost
pproval.
n is chosen. O
bination of al
e given where
Bio-methane
nd a
option is
Options
l the
ever
sources
A19A
15.1 Investme
econom
regulato
Reinforc
7bar net
have neg
demand
nature b
are those
example
subjecte
both cat
develope
environm
The simp
localised
pressure
Figure 15
Failing to
• Sy
cu
• So
in
its
on
Whilst th
under ou
reinforce
A= Netwodriven rei
B= Stratedriven rei
C= New Cdriven rei
D= InnovaNetwork Mdriven rei
A-15: Re
Introductent in networ
ic, efficient an
ry and legisla
ements are t
twork ,and re
gated the nee
and growth
ut are design
e schemes th
e new domes
ed to NGNs E
tegories NGN
ed to ensure
ment.
ple diagram b
d reinforceme
e managemen
5.1: Mains Reinf
o continue wi
ystem constr
ustomers, or
ource pressu
crease NGN
s networks. T
n the other ex
he 4 areas (A-
ur Total Netw
ement solutio
ork Validation nforcements
gy Replacement nforcements
Connections nforcements
ation and Total Management nforcements
einforcem
tion rk reinforcem
nd reliable ga
ative obligatio
ypically divid
einforcements
ed to underta
data. Therefo
ned to offset
hat are driven
stic housing b
Economic tes
N undertake E
outputs that
below details
ent stream. A
nt and leakag
forcement Inves
ith investmen
raints such as
ures increasin
could be in b
This will likely
xpenditure st
-D) in Figure
work Managem
on for the netw
R
LocalisedPressureConstraint
New Connections Including FuelPoor
A
C
ment Ma
ent ensures N
as transporta
ons placed up
ed between t
s are categor
ake wide spre
ore we will co
particular pre
n by third par
builds or indu
st model and
Engineering fo
deliver value
s the depende
And demonstr
ge control.
stment Drivers
nt in mains re
s extremity p
ng to ensure
breach of its
have the effe
treams.
15.1 above a
ment (TNM) p
work.
ReinforcemProjects
A B
C
ains
NGN operate
ation system t
pon it.
the below 7b
rised as gene
ead below 7B
oncentrate on
essure constr
rty connectio
strial and com
may require
or Value app
e for money, s
encies and in
rates the inte
einforcements
pressures bein
system cons
Policies and/
ect of increas
are discrete p
philosophy to
Combining Replacement with Reinforcement
ment s
Pressure Management &Leakage Reduction
B
D
es, and contin
thereby meet
bar network a
eral or specific
Barreinforcem
n localised sc
raints on the
n requests o
mmercial dev
funding in fu
roach where
security of su
ntegrated pro
eractions betw
s will result in
ng breached
straints are sa
/or see a high
sing the volum
processes wi
o provide inte
&
nues to oper
ting the requ
and the highe
c . Within the
ment scheme
chemes whic
network. Sp
r increase in
velopments, t
ll or part by t
by the optim
upply and min
ocesses attrib
ween reinforc
either:
resulting in p
atisfied. As th
her average s
me of gas esc
th NGN, they
egrated fit for
73
ate, a safe,
irements of re
er pressure, a
e general cate
es by analysin
ch are still gen
ecific reinforc
demands for
these project
he requester
um solution i
nimise impac
butable to the
cement, repla
poor pressure
hese source p
system press
capes thus im
y combine to
r purpose
elevant
above
egory we
ng future
neral in
cements
r
ts are
r. For
s
ct on the
e
acement,
es to
pressures
sure on
mpacting
gether
Under cu
be creat
models m
ensuring
design a
Furtherm
Distribut
Each net
pressure
order no
declared
Exceedin
and their
The valid
but also
constrain
to remed
During th
ensure th
with max
process
extremity
maintain
validation
In additio
enhance
offer ma
replacem
New con
reinforce
existing
whether
Upon ac
that are
and effic
affect the
Integrate
purely ta
measure
our TNM
All four e
74
urrent NGN p
ed to determ
must underg
g the models
and system m
more NGN/PL
ion Systems
twork has a d
es above whic
ot to exceed t
d, and record
ng MOP’s in
r associated
dation proces
the Year five
nts cannot be
dy the situatio
he mains rep
hat the annua
ximum efficie
. Typically thi
y pressures.
ned with sour
n process wi
on and within
e the project t
ximum benef
ment and rein
nnections driv
ements that n
supply point/
any of the re
cceptance of
needed to th
cient network
e network e.g
ed with the ab
arget reductio
ed against red
M approach to
elements inte
policy for <7B
mine whether
o a revalidati
provide an a
modification s
L/NP16 sets
Operating at
declared Max
ch NGN is no
these pressu
ded”.
preference to
repair costs w
ss not only en
e winter perio
e met even w
on.
placement pro
al replaceme
ency, NGN m
s can introdu
Whilst individ
ce pressures
ll be as a res
n the Strategy
to incorporat
fit to the netw
nforcement so
ven reinforce
need to be bu
/site. NGN po
esultant reinfo
any quotatio
he original rein
k and must ta
g. future main
bove process
ons in averag
ductions in lo
o reinforceme
ract to ensur
Bar Network A
a reinforcem
on every thre
accurate repre
simulations.
out policies w
t Pressures N
ximum Opera
ot prepared t
res. The max
o investment
will increase.
nsures that s
d (increasing
with sources s
ogramme (str
ent targets are
aximise the u
uce a mains d
dual project a
s not exceedi
sult of the ma
y pipe replac
te a reinforce
work with min
olution).
ements (also r
uilt in order to
olicy docume
orcement wo
on, further net
nforcement s
ake into accou
ns replaceme
ses, NGN are
e system pre
ost gas due to
ent.
re the optimu
Analysis (NG
ent strategy
ee years at a
esentation of
which are con
Not Exceedin
ating Pressur
to operate, an
ximum opera
in reinforcem
In addition a
ystem constr
g to 10 years
set at MOP t
rategy) NGN
e achieved w
use of “no-dig
downsizing w
analysis ensu
ng MOP’s, a
ains replacem
ement design
ment option.
nimal investm
referred to as
o supply a ne
ent NGN/SP/
orks are recha
twork analysi
scheme. NGN
unt future po
ents. Any enh
e also identify
essures. Thes
o leakage an
um reinforcem
N/PL/NP/16)
is required d
maximum. T
f the live asse
nsistent with
g 7Bar”.
re (MOP) “this
nd at which it
ting pressure
ment will gene
average syste
raints can be
for more com
hen a reinforc
face major d
with minimal im
g” techniques
with a resultan
res that minim
an element of
ment program
ns, opportun
Taking a TN
ment (one pro
s specific rein
ew load reque
NP/14 details
argeable to th
is is carried o
N has a requi
otential loads
hancement c
ying additiona
se schemes r
d repairs. Th
ment solution
), Network A
uring the nex
This validation
ets thus giving
IGE/GL/1 “P
s is the set of
t is prepared
e for each net
erate increas
em pressures
e met during t
mplex design
cement solut
elivery and sa
mpact on cus
s to expedite
nt gradual de
mum extremi
f the schemes
me.
ities present
NM approach
oject will prov
nforcements)
est or an incr
s tables that
he end custo
out to identify
rement to de
and other ch
osts are fund
al reinforcem
return favoura
ey provide a
s are prepare
nalysis mode
xt five years. T
n process inv
g confidence
Planning of Ga
f maximum s
to fund inves
twork must b
sed costs as l
s will increase
the next wint
s). Where sys
tion must be
afety challeng
stomer disrup
e the replacem
eterioration of
ity pressures
s designed w
themselves t
these oppor
ide both a
are those
reased load t
are used to b
omer.
y any enhance
evelop an eco
hanges that m
ded by NGN.
ent schemes
able CBA’s w
further exam
ed and imple
els must
These
olves
e in all
as
source
stment in
be
leakage
e.
er period
stem
devised
ges. To
ption and
ment
f
are
within the
to
rtunities
o an
base
ements
onomic
may
s that
when
mple of
mented.
15.2
2009/10
Reinforce
Governo
Figure 1
Reductio
requirem
of dema
continue
reinforce
Howeve
RIIO-GD
even wit
£5.11m
meet ou
15.3 The princ
have bee
platform
position.
As such
category
Figure 15
£m 2009
Mains an
Figure 1
GDPCR1
Average
15.4 Under N
are man
period a
• A
m
N
ac
• An
pr
th
R
M
RIIO-GD1
Prices £m
ement Mains &
rs
5.2: RIIO-GD1 R
ons in annual
ment for locali
nd. We are c
e to evaluate
ement.
r, as many pa
D1 will require
hin an overal
pa) on localis
r capacity ob
The Invesciples within
en in place fo
to operate a
.
, historical co
y over the RII
5.3 below fro
9/10 prices
nd Governors
5.3: GDPCR1 M
Total Capital
annual inves
Network GN Policy th
datory. A num
s follows:
“do nothing”
maintain syste
GN Policy an
ctivity expend
nnual Investm
reviously redu
hese have not
IIO-GD1 peri
Management a
Investme
13/14
5.4
Reinforcement M
l and peak de
ised network
currently carry
the most cos
arts of our ne
e ongoing rein
l profile of fal
sed reinforce
bligations dur
stment JoNGN Policies
or many years
a safe, secure
osts for Cape
O-GD1 perio
om the RIIO-G
200
4
Mains and Gover
Investment
stment over t
Risk he requiremen
mber of optio
” option. This
em extremity
nd would also
diture.
ment in line w
uctions in an
t led to signif
od its impact
and effectivel
ent Requ
14/15 15/
5.3 5
Mains & Governo
emand in GD
k reinforceme
ying out arou
st effective so
etwork are op
nforcement o
ling demand
ment project
ring 1 in 20 w
ourney s surrounding
s in their pres
e and efficien
ex mains prov
od.
GD1 busines
08/9 200
4.0
rnors Expenditur
his five year p
nt to maintain
ons are consi
s will require a
pressures ab
o have a nega
with historical
nual and pea
ficant reductio
t will be visibl
ly manage re
irements
/16 16/17
.2 5.2
ors
DPCR1 have n
nt to ensure
und 60-100 re
olution betwe
perating at or
of the network
. We forecas
ts including a
winter demand
g network pla
sent form. NG
t gas networ
vide an accur
s plan details
09/10 2
6.9
re
period equate
n system con
idered to the
associated in
bove the mini
ative impact
averages un
ak demand ov
ons in localis
le. Added to
einforcement
17/18
5.0
not led to sig
security of su
einforcement
een increasing
r close to the
k to meet loc
st to invest c.
a number of g
d conditions.
anning, netwo
GN are satisf
rk. There are
rate predictor
s NGN expen
2010/11
4.8
es to £5.8m/
nstraints witho
reinforceme
ncreases in so
mum. This ap
on the lost g
der GDPCR1
ver GDPCR1
sed reinforcem
this, NGN ha
from a holist
18/19 19/2
4.8 4.7
gnificant redu
upply during
t projects a y
g pressures a
e maximum o
calised load p
£40m during
governors wh
.
ork analysis a
ied that they
no proposals
r of future co
nditure over G
2011/12
4.9
/pa.
out exceedin
nt investmen
ource pressu
pproach doe
as emissions
1 of c.£5.82m
have been e
ment, it is ant
ave embraced
ic perspectiv
75
20 20/21
7 4.5
ctions in the
1 in 20 winte
ear of this na
and system
perating pres
pressure restr
g the period (
hich will ensur
and model va
provide a rob
s to move aw
osts likely in th
GDPCR.
2012/13
8.5
g the system
nt over the RII
ures above M
es not comply
s and leakage
m/pa. As disc
experienced.
ticipated that
d Total Netw
ve thereby en
Total
40.1
er levels
ature. We
ssure,
rictions
(average
re we
alidation
bust
way from
his
Total
29.1
m MOP
IO-GD1
OP to
y with
e repair
cussed
Whilst
t over the
work
suring
th
ca
pe
15.5 Reinforc
teams. S
solution
Strategy
program
NGN Po
approac
to ensur
Reinforc
most effe
TNM app
76
he most efficie
an have an ef
eriod.
Investmeement design
Subject matte
for the projec
y team to ens
mme.
olicy states th
ch taking due
e that the mo
ement projec
ective schem
proach acros
ent investme
fficiency app
ent Decisins are derive
er experts are
ct in hand. As
sure the prop
at; replacem
account of t
ost efficient a
cts are review
me with regard
ss all design t
nts are made
lied to reflect
on ed from within
e involved in
s a further ch
osals comple
ent and reinf
he way the s
and economic
wed within the
ds to future r
teams.
e. In summar
t the propose
n the Validatio
ensuring the
heck all schem
ement the TN
orcement pro
system has an
c design is id
e Distribution
replacement
ry NGN’s futu
ed investmen
on, Connectio
schemes de
mes are revie
NM approach
ojects must b
nd will be op
entified.
n Strategy sec
plans within t
ure investmen
t of c.£5.11m
ons or Distrib
erived deliver
ewed within t
h being applie
be developed
erated. It mu
ction to ensu
that area. Th
nt within this
m/pa over RII
bution Strateg
the best/opt
the Distributio
ed to the repl
d using a holis
ust also be as
ure that repre
is helps unde
category
O-GD1
gy
imal
on
acement
stic
ssessed
esent the
erpin the
A19A
16.1 NGN op
• 2,
op
• 24
• 2,
Of the Dthrough The drivemaintenabut is no
• In
• Si
• C
• Ph
• Po
• O
Within thearly devSome ofsafety. W
For the Son fail m2021 50
District a
A-16: Re
Introducterates and m
,355 District G
perate at a p
40 Industrial
,968 Service
District Governasset health ers for replacance frequenot limited to:
crease fault f
ingle feed go
apacity of the
hysical condi
olicy complia
Obsolescence
he Governor pveloped modf these modu
Within RIIO-G
Service Govemaintenance s0% of the pop
and I&C Gove
eplaceme
tion maintains a la
Governors, o
ressure abov
and Comme
Governors.
nor and I&C Gassessment
cement are pncies have be
frequency;
overnors, i.e.
e unit;
ition of the un
ance; and
e of equipmen
population thdules (1980’s)ules are also sGD1 the netwo
ernor populatstrategy. Currpulation will b
ernors
ent Gove
rge range of
of these 2,221
ve 2Bar;
rcial (I&C) Go
Governor pop, the networkrimarily increa
een required b
not twin strea
nit;
nt.
he network op) now requiresituated in floork is targetin
ion NGN hasrently, only 6
be over 30 ye
ernors
Governors, t
1 operate at
overnors; and
pulation therek has determased RCM mbased on an
am;
perates a nume specialist mood plains whng the remov
s adopted the.5% of the po
ears old.
hese include
a pressure b
d
e are a conseined will need
maintenance fanalysis of ri
mber of buriemaintenance which creates aval of all high
e policy of repopulation of S
S
e:
elow 2Bar an
ervative numbd replacing thfrequencies. sk to the net
ed ERS moduwhich is ineffiadditional riskrisk ‘out of d
placement afService Gove
ervice Gover
77
nd the remain
ber of units thhrough RIIO-GIncreased twork which i
ules. Many ofcient and expk on gas sup
date’ ERS mo
fter 30 years ernors are new
nors
ning 134
hat, GD1.
ncludes,
f the pensive. ply and
odules.
with a fix w and by
16.2 Within th
directly b
number
Replacem
District G
ERS mod
District G
Industria
Domestic
Total
Figure 1
Expendit
(in 2009/
<2Bar Di
>2 - <7B
I&C Gove
Domestic
Total
Figure 1
16.3
a) Critic
Criticality
category
District G
District G
a single
District G
a single
consider
establish
This allow
for repla
Industria
78
RIIO-GD1he RIIO-GD1
by Asset Hea
of Governors
ment Governor
Governor below 2
dules)
Governor above
l & Commercial
c Service Govern
6.1: Replaceme
ture (£M)
/10 prices)
istrict Governors
Bar District Gove
ernors
c Service Govern
6.2: Investment
The Inves
cality Asse
y assessmen
y, these inclu
Governors
Governor criti
feed network
Governor sup
feed network
red against th
hing single or
ws the netwo
cement.
al & Commerc
Investmeperiod NGN
alth Category
s that will be
2Bar (including
2Bar below 7ba
Governors
nors
ent Summary
13/
s 1.4
ernors 0.
0.
nors 0.2
1.8
Forecast – RIIO
stment Jo
ssment
nts for District
de;
icality assess
k as determin
pplies could b
k there is no a
he actual phy
r multi-fee crit
ork to target t
cial I&C Gove
ent Requproposes to
y e.g. 19, 20 a
replaced dur
Total
Populatio
2,221
ar 134
240
2,968
14 14/15
4 1.4
1 0.1
1 0.1
2 0.2
8 1.8
O-GD1 Governor
ourney
t Governors h
sment varies
ned by netwo
be supported
alternative to
ysical quantiti
teria.
the highest p
ernors
irementsreplace a sig
and 21. Figur
ring the RIIO-
on
RIIO-G
Perio
240
16
24
1,200
1,480
15/16 16/
1.3 1.
0.1 0.
0.1 0.
0.2 0.
1.8 1.
r expenditure for
has been con
based on wh
ork analysis m
d via other Go
supplying ga
ies of custom
priority (single
gnificant num
re 16.1 below
-GD1 period:
D1
d Per Y
30
2
3
0 15
0 18
/17 17/18
.3 1.3
.1 0.1
.1 0.1
.2 0.2
.8 1.8
recast
nsidered agai
hether they ar
modelling. In a
overnors for a
as to the area
mers relating t
e feed, large n
mber of Gover
w provides a
Year % o
pop
0 1
2 1
3 1
50 4
85 N
18/19 19
1.4 1
0.1 0
0.1 0
0.2 0
1.8 1
inst the releva
re part of a m
a multi-feed n
a short period
a. Criticality h
to specific Go
numbers of c
rnors, this is d
breakdown o
of total
ulation
%
Inv
1%
2%
0%
40%
N/A
9/20 20/21
.3 1.3
0.1 0.1
0.1 0.1
0.2 0.2
.7 1.7
ant classes w
multi-feed net
network the a
d in an emerg
has then been
overnors afte
customers) G
driven
of the
of total
vestment
77%
5%
6%
12%
100%
Total
10.7
0.7
0.8
1.8
14.0
within this
work or
area the
gency. In
n
er
overnors
Security
supply c
relations
Domesti
Service G
the netw
maintena
both a fin
The cons
b) Heal
District G
NGN has
predomi
approac
• In
• Si
• C
• Ph
• Po
• O
Figure 16
Figure 16.3
Above 2
Asset He
quantifie
240 RIIO
replacement
priorities
of supply for
could affect p
s implications
c Service Gov
Governors ge
work consider
ance policy a
nancial and s
sequence of
lth Assessm
Governors
s determined
nantly based
ch to health c
crease fault f
ingle feed go
apacity of the
hysical condi
olicy complia
Obsolescence
6.3 below su
3: RCM distribut
Bar Governo
ealth of the a
ed by PSSR f
r I&C Govern
processes and
consequenc
vernors
enerally supp
rs them low r
and a replace
safety perspe
failure of all t
ment
d the health o
d on its RCM
ategorisation
frequency;
overnors, i.e.
e unit;
ition of the un
ance; and
e of equipmen
ummarises th
Maintenance Fr
RCM G
RCM G
RCM G
RCM Go
RCM Go
RCM Go
RCM Go
RCM Go
RCM Go
RCM Go
tion
rs and I&C Go
above 2Bar D
requencies a
ors is vital as
d production
ces to both th
ply single cust
risk assets. A
e after thirty y
ective.
these assets
of its below 2
maintenance
n as it takes a
not twin strea
nit;
nt.
e current RC
requency below
ov Maintenance
ov Maintenance
ov Maintenance
ov Maintenance
ov Maintenance
ov Maintenance
ov Maintenance
ov Maintenance
ov Maintenance
ov Maintenance
Grand Total
overnors
District Govern
and obsolesce
s they feed im
and have se
he network a
tomers up to
As a result the
years policy w
is a loss of s
Bar District G
e frequencies
account of all
am;
CM frequencie
2Bar
e - 4M
e - 6M
e - 8M
- 10M
- 11M
- 12M
- 15M
- 18M
- 21M
- 24M
nors (134 uni
e data. The n
mportant com
erious reputat
nd its custom
o a maximum
e network has
which is cons
supply to the
Governor pop
s. The networ
the factors a
es within the
Total Nu
15
7
18
8
49
473
14
40
57
1,540
2,221
its) and I&C G
numbers esta
mmercial oper
tional, financi
mers.
of 10, they f
s adopted a
idered the op
customer.
pulation (2,22
rk considers
affecting RCM
network:
umber in Catego
40
544
97
1,540
2,221
Governors (24
ablished for re
79
rations. Loss
ial and public
fail safe and a
fix on fail
ptimum solut
21 units)
this to be a r
M namely:
ory Obsolete
40
29
0
122
191
40) is current
eplacement a
of
c
as such
ion from
robust
tly
are
based o
of subjec
NGN is u
methodo
Service G
NGN has
the optim
independ
Global re
Indepen
“Initially d
life as 50
with long
consider
that is ba
appropri
“In Enze
broadly f
c) Inve
Service g
all option
Option O
This will
security
District G
District G
Industria
Domestic
Total
Figure 1
Option T
Replace
requirem
District G
District G
Industria
80
n historic run
ct matter exp
undertaking a
ology for prio
Governors
s adopted a
mum solution
dent review c
eport is includ
dent Report
design lives a
0 years as pro
g term assets
rably shorter.
ased upon N
iate flow rate
n’s experienc
fits with that
stment Op
governor rep
ns.
One: Do Noth
lead to incre
of supply and
Replac
Governor below 2
Governor above
l & Commercial
c Service Govern
6.4: Option 1 W
Two: Maximu
ment assump
ments for I&C
Replac
Governor below 2
Governor above
l & Commercial
n rates, consi
pert assessm
a survey of al
ritisation of th
fix on fail ma
n from both a
commissione
ded below.
by Enzen Glo
and technical
oduct testing
s used in gas
Enzen recom
NGN’s require
and pressur
ce a technica
used in other
tions
lacement is b
ing
ased mainten
d high risk of
cement Governo
2Bar (including E
2Bar below 7ba
Governors
nors
Workload Volume
m Below 2Ba
ptions – repla
and District
cement Governo
2Bar (including E
2Bar below 7Ba
Governors
deration for l
ents.
ll its District G
hese assets t
intenance po
a financial and
ed by NGN an
obal
l asset lives m
g to simulate
s transportatio
mmends that
ements in term
re coupled to
al asset life of
r countries.”
based on cur
nance freque
f non complia
or
ERS modules)
ar
es
ar Governors
ace all below
Governors.
or
ERS modules)
ar
ocalised cap
Governor pop
throughout R
olicy and a re
d safety persp
nd undertake
may be consi
ageing for lo
on networks
t NGN define
ms of service
minimum int
f 25 to 30 yea
rrent policy co
encies and a s
ance with hea
Total P
2,
1
2
2,
12 month R
Total P
2,
1
2
pacity increas
pulation in 20
RIIO-GD1.
place after 30
pective. This
en by Enzen G
dered identic
nger service
actual techn
e a technical a
eability i.e. co
tervention ma
ars may be c
ompliance so
significant inc
alth and safet
opulation R
221
34
240
968
CM governor
opulation R
221
34
240
e requiremen
012 to help es
0 years policy
policy was s
Global. A sho
cal. A norm is
lives is not w
ical asset live
asset life for i
ontinuance of
aintenance.”
considered re
o the figure re
crease in risk
ty legislation.
RIIO-GD1 Period
0
0
0
1,200
1,200
rs, and assum
RIIO-GD1 Period
584
5
10
nts and interp
stablish a cle
y which is co
supported by
ort exert from
s to consider
well defined. H
es can be
its Service Re
gas supply a
easonable and
emains const
k to the netwo
d Per Y
0
0
0
15
15
me minimum
d Per Y
73
2
3
pretation
ar
onsidered
an
m Enzen
design
However
egulators
at an
d
tant for
ork to
Year
0
0
Year
3
Domestic
Total
Figure 1
Option T2Bar and
District G
District G
Industria
Domestic
Total
Figure 1
Option F
District G
District G
Industria
Domestic
Total
Figure 1
Option Fand I&C
District G
District G
Industria
Domestic
Total
Figure 1
c Service Govern
6.5: Option 2 W
Three: Conserd I&C Govern
Replac
Governor below 2
Governor above
l & Commercial
c Service Govern
6.6: Option 3 W
our: Minimum
Replac
Governor below 2
Governor above
l & Commercial
c Service Govern
6.7: Optio
ive: ConservaGovernors
Replac
Governor below 2
Governor above
l & Commercial
c Service Govern
6.8: Option 5 W
nors
Workload Volume
rvative Assumors
cement Governo
2Bar (including E
2Bar below 7Ba
Governors
nors
Workload Volume
m Assumptio
cement Governo
2Bar (including E
2Bar below 7Ba
Governors
nors
on 4 Workload V
ative Assump
cement Governo
2Bar (including E
2Bar below 7Ba
Governors
nors
Workload Volume
es
mption for Dis
or
ERS modules)
ar
es
ons for all Gov
or
ERS modules)
ar
Volumes
ption for Dist
or
ERS modules)
ar
es
2,
strict Govern
Total P
2,
1
2
2,
vernors
Total P
22
1
2
29
rict Governor
Total P
2,
1
2
2,
968
ors and Mini
opulation R
221
34
240
968
opulation R
221
34
240
968
rs and Minim
opulation R
221
34
240
968
1,200
1,799
mum Assump
RIIO-GD1 Period
240
5
10
1,200
1,480
RIIO-GD1 Period
240
30
16
24
1200
mum Assumpt
RIIO-GD1 Period
160
5
10
1,200
1,375
81
15
22
ptions for Ab
d Per Y
30
2
3
15
18
d Per Y
2
3
15
tions for Abo
d Per Y
20
2
3
15
17
0
8
bove
Year
0
0
5
Year
0
ve 2Bar
Year
0
0
5
d
T
F
S
S
E
L
C
D
82
d) Investment D
Measure
Total Asset Upgrades
inancial
Safety
Security of Supply
Environmental
Level of Risk
Comments
Decision
Decision
1,200
Total
Signifian
supply
Environ
Very H
throu
Not recom
N
Option One
(Do nothing)
Service Governors
investment £1.8m
nt increase in risk to
through failure of a
governor
nment is not the princip
High and increasing
ughout RIIO-GD1
mmended – too much
risk
Not acceptable
Option
(Maximum invest
minimal ot
584 DG’s, 5 >2B
Governors, 10 I&
Service Gove
Total investment c
Minimal risk to b
District Governors
high risk above 2B
governo
ple driver for this invest
Minima
Over engineering s
unachievable prog
no risk retained by
Not accept
2
ment DG’s
ther)
(Co
Bar District
&C, 1,200
ernors
24
Gov
circa £24m Total
Safety is not the p
elow 2Bar
s average to
Bar and I&C
rs
Mana
Distric
high r
ment although reductio
al
solution also
gramme and
the network
P
consid
for n
2Ba
table
Option 3
onservative & minimal
investment)
40 €, 5 >2Bar District
vernors, 10 I&C, 1,200
Service Governors
investment circa £12m
principle driver for this i
ageable risk below 2Ba
ct Governors medium t
risk above 2Bar and I&
District Governors
ons in CO2 emmission
governors.
Medium
Potential solution but
dered high risk retentio
network against above
ar and I&C customers
2
Optio
(Conservative
240 District G
>2Bar District G
I&C, 1200 Serv
m Total investeme
nvestment
ar
to
&C
Manageable ris
Gove
ns will be achieved thro
Medium ten
on
e
Optimal solutio
appripriate leve
the asse
1
on 4
e investment)
Governors, 16
Governors, 24
vice Governors
16
>2
ent circa £14m Tot
sk for all District
rnors
Me
ough removal of high fr
nding to low M
on retianing an
el of risk across
et base.
Acc
net
Option 5
(Minimal investment)
60 District Governors,
2Bar District Governors
10 I&C, 1,200 Service
Governors
tal investment Circa £9
edium to high risk for a
District Governors
equnecy maintenance
Medium tending to high
ceptable solution but t
twork considers it wou
retain too much risk
3
5
s,
9m
all
h
he
uld
Investme
NGN be
risk whils
This opti
Governo
16.4 In order
Governo
appraisin
of each i
(for I&C c
16.5 Whilst re
as those
required
network
effective
As part o
appropri
enable ra
a) Outp
The ben
District G
• En
un
• Sa
in
• Re
pr
Fa
m
• Al
im
ne
at
of
le
fre
Industria
• En
re
ent Decision:
lieves option
st replacing t
ion is a conse
or population
Selectionto manage th
ors which pos
ng the curren
individual Go
customers), a
Innovatioeplacing these
e which are m
to maintain t
in minimising
ly.
of our TNM a
iate solution.
ationalisation
put Deliver
efits/outputs
Governor Ben
nvironment –
nnecessary in
afety – Remo
cidents occu
eliability – Se
ressure netw
ault data gath
more frequent
lthough there
mmediate sav
etwork curren
t frequencies
ften as 4 mon
ss robust and
equently.
al & Commerc
nvironment –
equired to und
: Option Four
four is the op
he highest ris
ervative appr
over the eigh
n Criteria he risk appro
se the highes
nt RCM data
overnor. For e
and operation
on e Governors
more reliable a
them, this wi
g pressures c
approach an a
This could in
n of network a
ables
of investing
nefits
– As faults oc
ncreases in n
oving non-sta
urring.
ecurity of sup
works failure to
hered over tim
maintenance
e are significa
vings in opera
ntly has over
less than the
nthly, as the
d of less well
cial Governor
– As faults oc
dertaken ma
r
ptimal solutio
sk assets to b
roach that on
ht year RIIO-G
opriately NGN
st risk to be p
and overlayin
example this c
nal assessme
we will ensu
and consiste
ll in also mea
can be more
assessment
nclude reinfor
and optimisat
in these asse
cur, this type
network press
andard or lim
ply via these
o have readily
me highlights
e to prevent f
ant costs in th
ational, legisla
1,200 Distric
e current max
RCM risk tem
l defined failu
r Benefits
cur, increase
intenance an
on which allow
benefit the cu
nly requires th
GD1 period.
N is developin
prioritised for
ng this with a
could include
ent of conditi
re that we us
nt with a sma
an that any co
consistent, w
will be made
rcement and
tion of pressu
ets are as foll
e of equipmen
sures, increa
ited type equ
district gove
y available sp
s regulators th
failure.
he replaceme
ative complia
ct Governors
ximum of 24
mplate has th
ure reasons th
ed venting to
nd repair.
ws the netwo
ustomer.
he network to
ng selection c
replacement
an assessmen
e number of c
on.
se manufactu
aller amount
ontrol equipm
with again les
across the w
removal, rep
ures.
ows:
nt is designed
sing leakage
uipment will re
ernors is vital
pare parts wi
hat may fail in
ent of these d
ance, mainten
that are main
months, som
he mean time
hen those wh
atmosphere
ork to retain a
o update/repl
criteria that w
. This will ess
nt on the phy
customers, c
urers that use
of spares and
ment required
ss spares req
whole networ
positioning to
d to fail safe
for the syste
esult the likel
as these feed
ll delay restor
n the near fut
district govern
nance and pa
ntained due t
me of these a
e between fail
hich are main
and possible
83
an acceptable
lace 10% of
will allow the
sentially invol
ysical charact
commercial se
e the same eq
d less diverse
d to assist the
quired to main
rk as to the m
new location
that could re
em.
ihood of hum
d directly into
ration of supp
ture these req
nor sites ther
ainting costs.
to their config
are maintaine
lures for thes
ntained less
e purging of s
e level of
its
ve
teristics
ensitivity
quipment
e skills
e
ntain
most
n to
esult in
man error
o the low
plies.
quire
re is also
The
guration
d as
se units
supply is
• Sa
re
• Re
co
ha
ga
m
Domesti
• C
lo
• Sa
m
• Re
an
du
•
84
afety – Loss
equirements.
eliability – Se
ommercial op
ave serious re
athered over
maintenance t
c Service Gov
ustomer – Ex
ocations and s
afety – Loss
meet requirem
eliability – Se
n alternative t
ue to the low
of supply to a
ecurity of sup
perations loss
eputation and
time highligh
o prevent fai
vernor Benef
xpectations t
single source
of supply to a
ments.
ecurity of sup
to lay low pre
w cost of a ne
a major custo
ply via above
s of supply co
d media expo
hts regulators
lure.
fits
hat supply w
e supply and
a remote ven
ply via these
essure mains
ew asset as o
omer could le
e 2bar I&C Go
ould affect pr
osure implica
s that may fai
would be cont
will take long
nerable custo
small Govern
s. Replaceme
opposed to th
ead to a fatal
overnors are
rocesses and
ations leading
l in the near f
tinuous. Thes
ger to restore
omer could le
nors is vital to
ent is a more
he time spent
ity due to fail
vital as they
d production.
g to substanti
future these r
se can often b
e than norma
ead to a fatalit
o small numb
realistic optio
t maintaining
lure to meet
feed importa
. Loss of sup
ial costs. Fau
require more
be in remote
l LP supply.
ty due to failu
bers of custo
on than main
on a regular
ant
pply could
ult data
frequent
ure to
mers as
tenance
basis.
A19A
17.1 This sec
been ide
( 2009/10
Block Va
PIG Trap
<7 Bar S
E&I Telem
High Rise
Total
Figure 1
17.2 For each
over the
a) Bloc
Block Va
for plann
RIIO-GD
sure they
construc
distribute
Civils wo
of a new
Criticality
Criticality
Valve, bu
Asset He
There ha
categoris
A-17: Ag
The Spection is made
entified as be
0 prices £m)
alve (Civils)
ps (Civils)
Sleeves
metry Communic
e Building Valves
7.1: RIIO-
Justificatih of the asset
RIIO-GD1 pe
k Valves
alves are an e
ned work and
D1 will be targ
y are access
ction of a cha
ed evenly thr
ork associate
w chamber to
y
y for Civils on
ut is necessa
ealth
as been no m
sed as HI3.
ggregate
ific Requiup of a num
neficial to the
cations (<7 bar)
s
-GD1 Aggregate
ion for Ints above NGN
eriod:
essential part
d emergencie
geted at asso
ible and func
amber to hou
roughout the
d with Block
house the B
n block valves
ary to maintai
major work on
ed (Othe
irement tber of lines w
e network to
13/14 14/
0.05 0.
0.04 0.
0.04 0.
0.00 0.
0.10 0.
0.2 0
ed (Other Expend
vestmentN has justified
t of being abl
es to enable s
ociated Civils
ction correctly
se the Block
period to allo
Valves includ
Block Valve, o
s has been c
n the Block V
n Block Valve
r Expend
throughouwith all for pro
be carried ou
/15 15/16
05 0.05
04 0.04
04 0.04
00 0.22
10 0.00
.2 0.3
diture) (Projects
t d the drivers
e to operate
sections of p
work with 10
y. This will inv
k Valve at a un
ow for a rollin
de; excavatin
or new covers
lassed as me
Valve in the fu
es in the past
diture) (
ut RIIO-GDojects costing
ut.
16/17 17/1
0.05 0.05
0.04 0.04
0.04 0.04
0.22 0.00
0.00 0.00
0.3 0.1
<£0.5m)
for needing t
the network
ipe to be isol
0 (20% of pop
volve excavat
nit cost of £4
ng programm
ng a pit to rev
s for protectio
edium, as it h
uture.
10 years. As
(Projects
D1 g less than £5
8 18/19 1
5 0.05
4 0.04
4 0.04
0 0.00
0 0.00
0.1
this investme
safely, as the
ated. Investm
pulation) Bloc
ting to reveal
40K. This exp
me of work.
veal the Block
on.
has no direct
s such Block
85
s <£0.5m
500K, but wh
19/20 20/21
0.05 0.05
0.04 0.04
0.04 0.04
0.00 0.00
0.00 0.00
0.1 0.1
ent to be carr
ey allow shut
ment of £400
ck Valves to
the Block Va
penditure will
k Valve, cons
impact on th
Valve Civils h
m)
hich have
TOTAL
0.4
0.3
0.3
0.4
0.2
1.6
ried out
tdowns
0K over
make
alve and
be
struction
he Block
has been
Expendit
2009/10
Block Va
Figure 1
It is estimexcavatiobe as exvalve, co
RIIO-GD1
The ben
• En
• C
of
• Sa
Capital E
b) PIG T
Some ofand therthe replaetc.
Criticality
All Civils
Asset He
PIG Trapcategoris
Asset He
Without
Financia
It is estim
2009/10
Civils Ref
Figure 1
86
ture Forecast
prices £m
alve
7.2: RIIO-GD1 B
mated 20% oons at an ave
xtensive as thonstruction of
1 Benefits/Ou
efits/outputs
nvironmental
ustomer Serv
f pipeline to b
afety – Allows
Expenditure o
Traps
f the Civils worefore are clasacement of co
y
associated w
ealth
p site Civils thsed as HI3.
ealth and Crit
investment 2
l
mated that a
prices £m
furbishment – P
7.3: Civils Refur
ts
13/
0.0
Block Valve Expe
of Block Valveerage cost ofhat on the pipf new chamb
utputs
of investing
– Reduction
vice – Block V
be isolated if
s sections of
on Block Valv
ork associatessed as deteoncrete pipe
with PIG Trap
hat have not
ticality – Curre
20% of the sit
full site Civils
13
igh Traps 0.
rbishment – Pigh
14 14/15
05 0.05
enditure
es (10) will nef £40K each. peline. The exbers and new
in these asse
n in leakage th
Valves enabl
required. Thi
f pipeline to b
ves equipmen
ed with the Periorating, req
supports, ro
p sites have b
been replace
ently in GDPC
tes would de
s refurbishme
3/14 14/15
05 0.05
h Traps Expendi
15/16 16/
0.05 0.0
eed major CivThe work to
xpenditure wiw covers to pr
ets are as foll
hrough valve
e pipelines to
s can result i
be safely isola
nt is included
IG Trap sitesquiring assessoadway acces
been classifie
ed or significa
CR1
egenerated to
ent on a PIG t
15/16 16
0.05 0.
ture
/17 17/18
05 0.05
vils work such improve the ill be targetedrotect the val
ows:
.
o be split into
n less disrup
ated in event
d in Pipeline R
have not besment or moss, and hard
ed as low on t
antly modified
o HI4.
trap site wou
6/17 17/18
.05 0.05
18/19 19
0.05 0.
h as; valve pihealth of a B
d at excavatiove and preve
o sections, th
ption to suppl
of an emerge
Re-life section
en upgradednitoring. Thisstanding for
the criticality
d in the last te
ld cost £40k
18/19 19
0.05 0
9/20 20/21
05 0.05
its, covers anBlock Valve mons to reveal ent it from floo
erefore allow
y.
ency
n of this subm
d in the past 1s would typica
inspection ve
index.
en years have
per site.
9/20 20/21
.05 0.05
TOTAL
0.4
nd may not
the oding.
wing part
mission.
10 years ally entail ehicles,
e been
TOTAL
0.4
RIIO-GD1
• Se
c) <7Ba
It is estim
collabora
of c.£0.3
work and
resistive
The cond
Criticality
Sleeves
custome
Therefor
Financia
2009/10
<7 Bar S
Figure 1
£40K pe
nitrogen
sleeve.
Investme
appropri
and re w
wrapping
RIIO-GD1
• Sa
of
• Re
d) Tele
Telemetr
functiona
way of c
review th
is found
undertak
is sched
Criticality
This ass
environm
1 Outputs
ecurity of sup
ar Non-Nitr
mated there a
ation with oth
3m over the R
d implementa
bonds betwe
dition of non
y
are critical to
ers; however
re sleeves hav
l
prices £m
Sleeves
7.4: RIIO-GD1 <
er year has be
sleeves will n
ent will be tar
iate remedial
wrapping. This
g and being r
1 Outputs
afety – sleeve
f the pipeline
eliability – Se
metry
ry exists on 8
al it is outdate
communicatio
he existing sy
to be an opt
ken in line wit
uled for only
y
et has been c
ment or supp
pply
rogen Sleev
are 16 <7Bar
her networks
RIIO-GD1 pe
ation. This inc
een pipes an
N2 sleeves i
o maintain the
if a sleeve we
ve been assig
13/
0.0
<& Bar Sleeves E
een allocated
need remedia
rgeted at acc
work. This w
s is estimated
reinforced.
es protect pip
; and
ecurity of sup
89 below 7Ba
ed. The netw
ons is availab
ystem and ide
tion it is antic
th the above
a two year p
categorised a
ly while it is b
ves
r non nitrogen
to produce a
riod will be u
cludes grouti
nd sleeves.
s expected to
e integrity of a
ere to fail the
gned a mediu
14 14/15
04 0.04
Expenditure
d for non-nitro
ating over the
curately ident
will involve exc
d to cost £20
pes at vulner
ply through in
ar sites acros
work would lik
ble. In the first
entify if a tota
ipated this w
7Bar telecom
period to coin
as C4 as loss
being repaired
n sleeves in t
a uniform ma
sed to accur
ng sleeves w
o deteriorate
a pipeline and
ere would be
um criticality.
15/16 16/
0.04 0.0
ogen sleeves
e RIIO-GD1 p
ifying the con
cavating to re
0K per sleeve
able crossing
ntegrity of the
ss the networ
ke to review c
t half of RIIO-
al system upg
would cost circ
mmunications
ncide with oth
s of telemetry
d.
the network.
anagement pr
rately identify
which are curr
at a similar l
d thus allow
no direct los
.
/17 17/18
04 0.04
s. According t
period, with a
ndition of slee
eveal the slee
e. Overcrossi
gs, they are t
e pipeline.
rk. Although t
current telem
-GD1, a feasi
grade would
ca £5k per s
s section in o
her surveys.
y would have
NGN are cur
rocedure for
sleeves whic
rently vacant
evel to pipelin
it to continue
s of supply c
18/19 19
0.04 0.
to asset heal
an estimated
eves and the
eves, grouting
ngs may req
herefore esse
the current sy
metry operatio
ibility study w
add significa
ite. This sche
our Asset Hea
e no detrimen
87
rrently workin
sleeves. Inve
ch need reme
and restorin
nes with corr
e transporting
consequence
9/20 20/21
04 0.04
th indices 16
cost of £20K
n implementi
g of vacant s
uire re paintin
ential to the i
ystem is fully
ons to see if a
will be underta
ant benefit. If
eme would on
alth Category
ntal effect on
ng in
estment
edial
g
rosion.
g gas to
.
TOTAL
0.3
6 non
K per
ing
sleeves
ng, re
ntegrity
a smarter
aken to
upgrade
nly be
y 22, and
safety,
Asset He
The syst
Financia
In the firs
identify if
anticipat
covered
2009/10
E&I Telem
Figure 1
RIIO-GD1
The sugg
• En
fo
• Re
e) High
It has be
Rise Bui
to quickl
These bu
service v
installed
In order
Consequ
In the ma
the items
deteriora
enhance
Medium
Conditio
Other th
assessm
f) Othe
Do Noth
The optio
Howeve
program
88
ealth
tem is curren
l
st half of RIIO
f a total syste
ted this would
in Asset Hea
prices £m
metry Communic
7.5: RIIO-GD1 E
1 Outputs
gested option
nvironmental
ootprint; and
eliability – sec
h Rise Build
een identified
lding exist wi
ly close off th
uildings were
valves need t
at a total cos
to comply w
uence of Failu
ajority of thes
s listed, they
ating and hav
e the network
or Low critic
n Assessmen
an fault data
ment. This will
er Options C
ing:
on to ‘do not
r, the assets
mme aims to p
tly fully functi
O-GD1, a feas
em upgrade w
d cost circa £
alth Category
cations (<7 bar)
E&I Telemetry Co
ns cover the
– better tele
curity of supp
ding Valves
following an
ithin the netw
he gas supply
e mainly cons
o be fitted. T
st of £200K.
ith IGE/G/5 t
ure
se cases then
would contin
ve not been fu
k, as well as a
cality.
nt
physical con
l be supplem
Considered
thing’ in thes
will continue
plan this as a
ional but agin
sibility study
would add si
£5k per site.
y 22. Total co
13/14 14/
0.00 0.
ommunications
following prim
communicat
ply.
s
extensive su
work that do n
y to the build
structed in the
This strategy h
his work will
n no immedia
nue to be rep
ully addresse
allowing curre
ndition of the
mented with fie
e cases is a v
to deteriorat
a phased exp
ng. As such it
will be under
gnificant ben
The feasibility
ost for this inv
/15 15/16
00 0.22
(<7 bar)
mary outputs
ions should le
urvey of these
not have satis
ing.
e 1960’s era
has been agr
be necessary
ate effect will
paired on an a
es for some t
ent operating
asset has be
eld surveys w
viable one, a
te until such t
penditure on a
t has been ca
rtaken to revie
nefit. If upgrad
y study is exp
vestment wou
16/17 17/1
0.22 0.00
s:
ead to reduc
e types of pro
sfactory serv
, and surveys
reed with the
y to meet the
be seen on t
as required b
ime. It is felt t
g requirement
een determine
which are cur
nd has been
time as expe
a proportion o
ategorised as
ew the existin
de is found to
pected to co
uld be £445K
8 18/19 1
0 0.00
ced visits redu
operties that
vice valves sh
s have identif
e HSE and the
e requirement
the network
basis. Howev
this expendit
ts to be met.
ed through s
rrently ongoin
adopted for
enditure will b
of these over
s H12.
ng system an
o be an optio
st £50K, but
K.
19/20 20/21
0.00 0.00
ucing the car
a number of
hould it be ne
fied that a nu
ese valves w
ts.
by failure of a
ver, they are a
ure will signif
All are class
subject matte
ng in 2012.
a number of
be necessary.
r this period.
nd
on it is
is
TOTAL
0.4
rbon
High
cessary
umber of
ill be
any of
all
ficantly
ed as
er expert
years.
. This
17.3 Innovatio
nitrogen
Remote
reports i
antenna)
Innovatioon in how we
sleeves with
monitoring o
mmediately i
) using the G
on e tackle these
h remote mon
on sleeves me
f an alarm th
SM network
e remedial wo
nitoring and th
easures pres
reshold is ex
and is install
orks will be c
he E&I teleme
sure automa
ceeded. It co
ed in the sam
onsidered, p
etry works id
atically, check
ommunicates
me way, simp
articularly in t
dentified.
ks that it is wi
s (via either an
ply requiring a
89
the cases of
ithin specifica
n internal or e
a mobile pho
the
ation and
external
ne.
A19A
18.1 Within R
for demo
on the w
physicall
surround
absence
replacem
2009/10
Rationa
govern
stor
Figure 1
18.2
a) Curre
Demolitio
equipme
Consequ
The infra
that it inc
township
supply a
Conditio
A deskto
remove e
around w
increase
This is b
accessib
Out of o
rationalis
90
A-18: RaStra
The SpecRIIO-GD1, NG
olition of the H
whole network
ly disconnect
ding distributi
e of the diurna
ment of existin
Prices £m
alise mains and
nors to support
age strategy
8.1: RIIO-GD1 R
Justificati
ent Contro
on has only t
ent has rema
uence of Failu
astructure aro
corporates th
p. Therefore f
and safety of t
n Assessmen
op assessme
equipment an
which sites w
e through the
ased on the
bility to equip
ur 35 sites, w
sation.
tionaliseategy
ific RequiGN plans to ra
Holder. As pa
k and adopt
ted from the
ion network i
al storage fac
ng infrastruct
13/14
0.4
Rationalise main
ion for In
l Run Rates
aken place re
ined within th
ure
ound gas hold
he larger diam
failure within
the general p
nt
ent has been
nd maintain e
will be made a
RIIO-GD1 pe
assumption t
ment and for
we believe 15
e Mains
irement tationalise the
art of NGN’s
innovative ap
system and t
s capable of
cility. This wil
ture which w
14/15 15/
0.4 0
s and governors
vestment
s
ecently where
he existing lan
der’s sites is
meter trunk m
this part of th
public.
undertaken o
existing dema
available and
eriod.
that early rem
recast chang
5 will not requ
& Gover
throughoue local networ
TNM approa
pproaches wh
then demolis
meeting gas
l require ratio
ill be unique t
/16 16/17
.5 0.6
s to support stor
t
e the gashold
nd footprint.
deemed to b
mains that fee
he network w
on the likely r
and. As this i
when at this
moval will be
es on the wh
uire off site ad
rnors to
ut RIIO-GDrk surroundin
ach this ration
here appropr
shed it will be
s demands an
onalisation, up
to each indiv
17/18
0.7
rage strategy Ex
der has been
be at the high
ed through to
will have a ma
rationalisation
s a desktop
s early stage N
done on thos
hole network.
djustments an
Support
D1 ng gasholders
nalisation will
riate. Before g
necessary to
nd flow requi
pgrading and
vidual site loc
18/19 19/2
0.7 0.8
xpenditure
n structurally u
her end of the
o the sub netw
aterial impact
n needed aro
exercise and
NGN believe
se with less e
.
nd 20 will req
t Storage
s either in pre
l assess the i
gasholders a
o ensure the
rements in th
d on occasion
ation.
20 20/21
8 0.8
unsound and
e criticality ind
works within
t on both sec
ound the site
d uncertainty
the costs are
engineering d
quire some le
e
eparation
mpact
are
he
ns
Total
4.9
d
dex in
a
curity of
to
exists
e likely to
difficulty
evel of
Figure 188.2: Assessmennt of gasholder ssites requiring M&G investment
91
b) Cost
The CBA
• Ef
• Ab
• Re
• M
• C
c) Othe
Do Noth
Site rem
optimise
18.3 Expert k
remove e
18.4 To form
92
t Benefit An
A undertaken
fficiency of th
bility to reduc
educed Main
Minimise future
ombine with
er Options C
ing:
ains a gas ha
ed.
Selectionknowledge of
equipment of
Innovatiopart of the T
nalysis
n has taken fu
he Network;
ce average sy
ntenance & R
e possible re
other Netwo
Considered
azard site situ
n Criteria gasholder lo
ff site.
on NM approac
ull considerat
ystem pressu
Repair Costs;
inforcement;
ork Managem
d
uated in an in
ocations, surr
h.
tion of:
ure;
and
ment Process.
nappropriate
rounding size
.
location. Net
es and flows o
twork pressu
of network. L
res and flows
Likely requirem
s are not
ments to
A19A
19.1 The exis
as they h
spare pa
replace t
natural g
capabilit
replace a
Carbon
RIIO-GD
£m 2009
Gascose
CO detec
Figure 1
19.2
a) Envi
The envi
it creates
30/01/12
have bee
b) Safe
Presently
property
the curre
adding fu
carbon m
Currently
business
approac
primary
requiring
towards
• Ac
• In
so
• Ba
FA
• N
pr
What ha
A-19: Ga
The Specting Gascose
have been in
arts, replacem
them with eq
gas. There wa
y and are cu
all current Ga
Monoxide rea
D1 business p
9/10 prices
eeker replaceme
ction capability
9.1: RIO-GD1 G
Justificati
ronment
ronmental be
s an instant s
2 where we s
en a total sav
ety
y operatives
y is safe to en
ent issue GAS
urther capab
monoxide (CO
y we are com
s within the n
ch by NGN to
purpose of th
g amendment
the full imple
ctive Alarm –
active Alarm
ounding;
attery Fail – T
AIL; and
o Alarm – Th
roperty.
ppens if one
ascoseek
ific Requieekers used b
operation sin
ments etc. As
quipment whic
as strong fee
rrently trialling
ascoseekers
adings. All th
plan:
13/14
nt with 1.2
Gascoseeker rep
ion for In
enefit of this p
saving on bat
saved a total
ving of £4,80
rely on the sk
nter when res
SCO detectio
bilities to the n
O) and oxyge
mpleting a gas
network which
o ensure a mo
he trial is to id
t or not being
ementation of
– This is wher
– This is whe
This is where
his is where a
of these ass
kers
irement tby our workfo
nce 1983 and
s set out in S
ch incorporat
edback from o
g suitable eq
with a newer
e Gascoseek
4 14/15
1.2
placement with C
vestment
proposed rep
ttery waste. A
of 1040 batt
0 for the sam
kills and com
sponding to p
on equipmen
new equipme
en (O2) in the
s detection e
h has a highe
ore customer
dentify any op
g feasible. In
f our proposa
re a PRE with
ere PRE with
a PRE with C
a PRE with CO
sets fails?
throughouorce are due
d are becom
ection six of
tes the capa
our stakehold
uipment. Wit
r model that m
ker investmen
15/16 16/1
0.0 0.0
CO detection ca
t
placement pr
Analysis on th
teries. If rolled
me reporting p
mpetence as r
public reporte
t. This equip
ent, engineers
e atmosphere
equipment tria
er than avera
r focused sol
perational iss
the absence
als during RII
h CO has bee
h CO has bee
CO has been
O has been r
ut RIIO-GDfor replacem
ing obsolete
the RIIO-GD
bility to unde
ders that our
thin the RIIO-
monitors not
nt is driven d
17 17/18
0 0.0
apability Expendi
rogramme is
his has been
d out across
period.
responding e
ed escapes (P
ment current
s will be able
e as well as m
al that involve
ge number o
ution is being
sues which w
of any conte
O-GD1.
en reported a
en reported b
n reported as
reported whe
D1 ment early in t
due to not b
1 Business P
rtake CO det
emergency s
-GD1 period
only gas but
irectly by Sec
18/19 19/
0.0 0
ture
with the unit
done for the
the whole ne
engineers to d
PRE), this is a
tly only detec
to assess th
methane.
es one opera
of CO inciden
g applied to C
would result in
entious issues
and the CO A
but the CO Al
s the result of
ere NO CO AL
93
the RIIO-GD1
eing able to g
Plan, we plan
tection along
staff should h
NGN propos
t also Oxygen
ction 7.5.6 w
/20 20/21
.0 0.0
being re-cha
period 01/11
etwork this w
determine if a
aided by the
cts methane.
he content of
ational area of
ts. This is a p
CO detection
n NGN’s prop
s we will wor
Alarm IS soun
arm IS NOT
f a Alarm BAT
LARM fitted i
1 period
get
to
side
have this
ses to
n and
within the
Total
2.4
argeable
1/2011 –
would
a
use of
By
both
f the
proactive
n. The
posal
rk
nding;
TTERY
in the
We have
process
operative
safety co
Conditio
NGN det
including
deliverab
in the RI
with equ
c) Cost
The tech
by cold w
recharge
and drai
d) Fina
Roll the
• 12
• 80
• Ve
Total Co
e) Othe
Do Noth
• D
w
an
• N
Summar
To Summ
following
• In
• O
• D
• In
• In
pr
ap
an
94
e already acc
would still be
es in all areas
omprehensive
n Assessmen
termines the
g Age, Model
bles. The exis
IO-GD1 perio
uipment whic
Benefit An
hnology offers
weather, and
e as they trav
ning standard
ncial Analy
new equipme
200 extra Ga
00 engineers
ehicle Upgrad
ost = £2,186,
er Options
ing
o nothing. Th
with aging and
nd
ot meeting st
ry
marise, we b
g points:
crease the sa
Offer custome
eliver additio
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ging Unit) = £
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ility to undert
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mation and ad
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ocarbons, but
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her gas/air or
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95
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the results of
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20.2 Overcros
they are
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run rates
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The ben
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96
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ssings
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Justificatissings are cr
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ct is currently
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efits/Outpu
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ustomer Serv
afety – Overc
uence of Failu
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acility, above
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by 2013. Prel
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over RIIO-G
t of between
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acceptable le
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13/14
0.3
Over crossings E
ng examples
ion for Initical assets,
n which the p
crease safety
e surrounding
underway to
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te information
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uts
of investing
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15/16 16/1
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t they are the
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17 17/18
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97
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98
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ument i.e. ins
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A19A
21.1 Within th
has over
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pressure
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13/14 14
0.7 2
Remote Pressure
ion for Inrequire NGN
ost of visiting
ators is not in
processes, w
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4/15 15/16
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nual pressure
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16/17
2.4
Control Expendit
t fficiently and
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reduce the am
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pressure and
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13/14 14
0.7 0
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A19A
23.1 Every op
installatio
• 23
• 14
• 2,
• 24
• 32
• 2
• 25
• 48
These si
civil struc
categoris
• B
• ‘O
st
Figure 23
Figure 23
a) Curre
A-23: Bu
Introductperational site
ons (AGI’s) in
3 Offtakes;
43 Above 7B
,595 Domest
40 I&C Gove
2 gasholder S
High Pressu
5 PIG Trap S
8 Block Valve
tes all contai
ctures require
sed into two
uildings
Other Civils’ w
tandings, pip
3.1: Examples o
3.2: Examples o
ent Price C
uildings/
tion e within the n
n the network
Bar PRI Sites;
tic Governors
rnors;
Sites;
re Bullet Site
Sites; and
e Sites.
n equipment
ed for suppo
areas:
which compri
e supports, d
of Poor Condition
of Poor Condition
ontrol Run
/Civils Re
etwork is imp
k. These inclu
s;
s;
essential for
ort, protection
se non-build
ductwork, roa
n Buildings
n Other Civils
Rates
ebuild a
pacted by Civ
ude:
r the safe tran
n and access
ing or fence
adways, drain
nd Refu
vils. There ar
nsportation o
to the gas e
line Civils on
nage etc.
Deteriorat
brickwork
rbishme
e over 3000
of gas. Each s
equipment. C
site. For exa
ting
k
105
ent
above groun
site contains
ivils have bee
mple, valve p
nd
various
en
pits, hard
NGN’s a
below 7B
doors an
has been
roofs or
Over the
assets. F
reports b
replacem
• Le
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• N
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23.2 Within R
identified
will allow
Most of
NGN be
grouping
Conside
be highly
Civils
Civils – B
Civils – O
Civils – B
Civils – O
Below 7B
TOTAL
Figure 2
23.3 Criticality
The two
the critic
classified
assets c
impact to
It is wort
range of
developm
106
average yearly
Bars PRIs an
nd roofs, repl
n almost exc
a replaceme
e last few dec
Following sev
back from the
ment/modifica
egislative com
geing assets
sbestos on b
oise reductio
afety and sec
RIIO-GD1RIIO-GD1 NGN
d for below 7
w NGN to initi
NGN’s above
lieve deliverin
g these asset
ring the over
y conservativ
Buildings(Offtake
Other (Offtakes)
Buildings (PRI >7
Other (PRI >7Bar
Bar civils
3.3:RIIO-GD1 B
The Inves
y Assessmen
categories fo
cality index re
d as medium
ontained with
o safety for o
th noting that
f assets as a
ment NGN w
y investment
nd district gov
lacement of k
lusively targe
nt GRP kiosk
cades NGN h
veral indepen
e field NGN n
ation strategy
mpliance, DS
with deterior
buildings;
on; and
curity.
InvestmeN has propos
Bar Civil wor
iate a targete
e seven bar s
ng the recom
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r)
Buildings & Civils
stment Jo
nt
or Civils on s
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criticality as
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t NGN does n
true reflectio
will be assessi
in below 7Ba
vernors and r
kiosks, upgra
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k installed wh
has adopted a
ndent surveys
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SEAR;
rating conditi
ent Reqused to invest
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site were uilt
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nt projects an
ce and range
e.
Expenditure Su
ourney
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This is based
a result of th
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not consider
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ing criticality
ar civil works
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ade of duct w
w 7Bar assets
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se the need to
rivers behind
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ine with curre
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programme
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and ‘Other’,
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applying a g
such as part
based on ea
s is currently c
pipe supports
work etc. With
s and often in
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repair and m
by Advantica
o adopt a mo
this change
civil based pr
ent price con
mme as sum
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will take acc
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8.6
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have been c
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ed as low ba
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s modificatio
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maintain abov
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as such are in
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orks ongoing
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eplacement o
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l and Gould a
re:
of this invest
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Number of Upg
11
8
40
40
ine with current
N/A
medium and
ecifically build
hey provide t
perceived min
across such a
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k on
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tment
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civil
and
tment is
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elow.
ndition.
ale
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ers this to
rades
run rate
low on
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to the
nimal
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r
example
theft risk
b) Heal
Health a
• Le
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• N
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Legislati
When un
brought
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equipme
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NGN has
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built and
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lth Assessm
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egislative com
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sbestos on b
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afety (particu
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in line with c
n relief roofs,
s on NGN’s s
ent within bui
assets with d
NGN’s above
cognises the
ance is no lon
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s on building
s several buil
s register. Ma
ng and/or relo
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he issue is so
d parallel equ
duction
me regulators
g these upgra
and noise le
buildings will
on measures w
security
es on site and
ite. In additio
e buildings, va
e now falling t
sed health ev
on to the indes multiple so
ment. NGN ar
ntained within
ment
has been bas
mpliance;
with deterior
buildings iden
on; and
ularly at above
ce
odifications t
urrent DSEA
, inserting new
sites need bri
lding s is bein
deteriorating
e seven bar s
network has
nger conside
s identified o
ldings on abo
any of these
ocating. Whe
ch NGN will n
significant (fo
ipment instal
have been u
ades the build
evels have rea
be designed
will be introd
d good condi
on in many ca
alve covers, d
to below acce
vidence
ependent siteurces of fieldre also engag
n each buildin
ed on the fol
rating conditi
ntified on abo
e 7Bar sites,
to buildings a
R legislation.
w ventilation
inging up to s
ng modified t
condition
site were buil
reached a ti
ered the best
on above 7Ba
ove seven ba
buildings nee
en undertakin
need specialis
or example a
led before th
psized as a r
dings housing
ached unacce
d to allow the
uced such as
tion of gener
ases Civils pro
ductwork etc
eptable levels
e surveys und information
ging on series
ng, what is th
lowing areas
on;
ove 7Bar sites
with valve pit
and/or equipm
This often re
or replaceme
standard and
the building it
t 40 to 50 ye
pping point in
option. In m
ar sites
ar PRIs conta
ed modificatio
ng work in the
st contractors
asbestos E&I
e old building
result of incre
g the regulato
eptable levels
e correct leve
s padding an
ral site Civils i
ovide the ma
c. Independen
s.
dertaken by fwhich suppos of site surve
he area like w
:
s;
ts, roadways
ment within th
equires remov
ent with mod
d as a part of
tself will requ
ears ago and
n its approac
any instance
aining asbesto
ons or the eq
ese building t
s to facilitate
Kiosks) that
g and equipm
eased capacit
ors no longer
s. New buildi
l of noise sup
nd sound pro
is important t
ain security m
nt surveys ha
faithful and Gorts its appraieys in 2012 to
where the PRI
s and curbing
hem, the buil
ving roofs, to
dern GRP kio
f other projec
uire modificati
as such are
ch to these as
s it is no long
os as indicate
quipment with
the asbestos
its safe remo
a new buildin
ment can be r
ty requiremen
r provide ade
ings and/or m
ppression and
oof kiosks wh
to the safety
measure for th
ave found tha
Gould and presal of its curro further defi
107
is situated i.
g).
lding must be
o replace with
sks. Many of
cts i.e. where
ion.
in a similar c
ssets and as
ger possible t
ed on the net
hin them nee
will become
oval. In the m
ng will need t
removed/dem
nts. In some
equate sound
modifications
d retrospectiv
ere appropria
of operatives
he site equipm
at general Civ
eviously Advarent asset hene asset hea
e. high
e
h
f the
ondition.
such
to
tworks
ds
majority of
to be
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cases
d
to
ve
ate.
s working
ment for
vils on
antica ealth alth and
allow it tinclude:
Modus:
On a daiphotos oas well aOfftakes
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All sites Systemspipe stanof gas.
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NGN havintendedsame tim
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Consultathese as
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Followingwere pocategorie
Offtakes
Civils onpits, ductwo civil
Asset He
17 N
(C
108
o establish a
ily basis photof sites are caas doors, roos have been id
spection:
receive a visus Regulationsnds on Offtak
dent surveys
ve had a numd as a sampleme and as su
matter exper
ation with opessets. It is the
work Risk
g the criticalitpulated for Pes. Civils wor
s
Offtakes havctwork, curbinassets per s
ealth & Critica
Asset catego
NTS Offtakes
Civils)
clear prioritis
tos are uploaan be used tofs and pathwdentified for c
ual inspections and is part okes and PRIs
s
mber of sites e of the sites ch can be as
rt opinion
eratives worke opinion of th
ty and asset PRIs and Offtarks associate
ve been consng etc.) at onite.
ality – Curren
ries
sation metho
aded to a servo support inv
ways/ducting.complete ren
n in line with of NGN’s mas as well as a
assessed byacross the n
ssumed to be
king on site dhe SME’s tha
health assesakes. Civils wed with distric
sidered to incne per site. Th
t Condition
Criticality In
Low
Medium
High
Very High
odology for th
ver using the vestment dec. Subsequent
newal.
the VS02 staaintenance poaspects of Civ
y constructionnetwork. Mane in a similar c
daily and contat these asse
ssments undewere a sub cact governors
clude buildingherefore for t
dex Asset dis
HI1
h
his work. The
MODUS mocisions. Kiosktly a number
andard. It is aolicy. This wilvils which dire
n consultantsny of the sitescondition.
tractors help ets are in need
ertaken by thategory of theis not include
gs (one per sithe purposes
stribution based
HI2
methods use
obile phone teks in bad con
of larger buil
a requirementl highlight issectly affect th
s Faithful ands were constr
to build up ad of intervent
e NGN the aese two primaed within the
ite) and others of this repor
d on estimated a
reporting year
Asset health ind
HI3
21
23
ed to assess
echnology. Rdition are idedings on PR
t of the Presssues with corrhe safe transp
Gould. This ructed around
a better pictution.
sset health taary asset heaasset health
r Civils (roadsrt this gives a
asset health inde
r
dex
HI4
health
Real time entified Is and
sure roded portation
was d the
re of
ables alth tables.
s, valve a count of
ex in current
HI5
Asset He
17 N
(C
Investme
sites. Bu
are expe
cost of £
assumpt
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There ar
site) and
of this re
Asset He
18 P
C
Asset He
18 P
C
ealth and Crit
Asset catego
NTS Offtakes
Civils)
ent on Offtak
uilding upgrad
ected to cost
£200K per sit
tions on a pro
s
re 143 above
d other Civils
eport this give
ealth & Critica
Asset catego
PRI’s above 7 ba
Civils
ealth 7Bar Cri
Asset catego
PRI’s above 7 ba
Civils
ticality - With
ries
kes will includ
des are estim
£582K and £
te. Deteriorat
ofile of deteri
7Bar PRI sit
(roads, valve
es a count of
ality - Curren
ries
ar
iticality - Wit
ries
ar
hout Investm
Criticality In
Low
Medium
High
Very High
e 11 building
mated at a un
£684K respe
ion has been
oration.
es. Civils on
pits, ductwo
f two civil ass
t Condition
Criticality In
Low
Medium
High
Very High
hout Investm
Criticality In
Low
Medium
High
Very High
ent
dex Asset d
HI1
h
gs (this is likel
it cost of £20
ectively. ‘Othe
n based on an
PRIs have be
ork, curbing e
sets per site.
dex Asset dis
HI1
h
ment
dex Asset d
HI1
h
distribution base
HI2
ly to be 6 site
00k per build
er Civil Works
n assessmen
een consider
etc.) at one p
stribution based
HI2
distribution base
HI2
ed on estimated
March 2021
Asset health ind
HI3
13
17
es) and, eight
ing; Cowpen
s’ per site are
nt of current c
ed to include
er site. There
d on estimated a
reporting year
Asset health ind
HI3
143
143
ed on estimated
March 2021
Asset health ind
HI3
63
63
109
remaining usefu
dex
HI4
8
t ‘other Civils
Bewley and
e estimated a
condition and
e, buildings (o
efore for the p
asset health inde
r
dex
HI4
remaining usefu
dex
HI4
80
80
ul life at 31
HI5
6
s’ on
Elton
at a unit
d
one per
purposes
ex in current
HI5
ul life at 31
HI5
Building
estimate
investme
to upgra
NGN rec
very con
Building
estimate
investme
to upgra
NGN rec
very con
e) Inve
Option O
The n
Build
cond
Costs
quan
mana
risk.
Option T
Inves
sites.
There
perio
This w
Option T
Inves
sites.
There
perio
This w
Option F
Inves
sites.
There
perio
This w
110
upgrades ar
ed at a unit co
ent, however
ade 40 buildin
cognises that
nfident in its a
upgrades ar
ed at a unit co
ent, however
ade 40 buildin
cognises that
nfident in its a
estment Op
One: Do Noth
network cons
ings another
dition and sec
s associated
tify. A simple
aging the risk
Two: Top Tier
stment to upg
. Also upgrad
e will be cont
d.
would require
Three: Middle
stment to upg
. Also upgrad
e will be cont
d.
would require
our: Low Tier
stment to upg
. Also upgrad
e will be cont
d.
would require
e estimated a
ost of £50k p
with more ac
ngs across P
t the asset he
assessment o
e estimated a
ost of £50k p
with more ac
ngs across P
t the asset he
assessment o
ptions
ing
siders a ‘do n
Civils are no
curity reasons
with any of t
e CBA analys
k of asset failu
Approach
grade/replace
de/replaceme
tinued investm
e £28m inves
e Tier Approa
grade/replace
de/replaceme
tinued investm
e £15.4m inv
r Approach
grade/replace
de/replaceme
tinued investm
e £13m inves
at a unit cost
per site. Asse
ccurate data
RIs and 28 ‘o
ealth tables fo
of requiremen
at a unit cost
per site. Asse
ccurate data
RIs and 28 ‘o
ealth tables fo
of requiremen
nothing’ appr
ow at a point
s as sited abo
the catastrop
is for this typ
ure. This inve
e buildings on
ent of all ‘othe
ment on sma
stment.
ch
e buildings on
ent of 11 build
ment on sma
vestment.
e buildings on
ent of eight b
ment on sma
stment.
t of £25k per
et health table
collection, w
other’ civils o
or civil works
nts for RIIO-G
t of £25k per
et health table
collection, w
other’ Civils o
or civil works
nts for RIIO-G
roach for the
where capita
ove.
phic failure me
pe of equipme
estment has b
n 80 PRI sites
er’ Civils and
aller District G
n 40 PRI sites
dings on Offt
aller District G
n 20 PRI sites
uildings on O
aller District G
building and
es indicate th
we feel this fig
on sites.
need more d
GD1.
building and
es indicate th
we feel this fig
on sites.
need more d
GD1
specific asse
al investment
echanisms ar
ent is not pra
been driven b
s and upgrad
buildings on
Governors in l
s and upgrad
takes and ‘ot
Governors in l
s and upgrad
Offtakes and ‘
Governors in l
d other civil w
at 80 sites w
gure is conse
development
d other civil w
at 80 sites w
gure is conse
development
ets identified
is required fo
re very subje
actical as the
by the netwo
de/replace ‘o
n Offtakes.
ine with the c
de/replace ‘o
her’ Civils on
ine with the c
de/replace ‘o
‘other’ Civils
ine with the c
works per site
would need
rvative. NGN
but the netw
works per site
would need
rvative. NGN
but the netw
unacceptabl
or legislative,
ctive and diff
key driver is
rks managem
other’ Civils o
current price
other’ Civils o
n eight Offtak
current price
other’ Civils o
on four Offta
current price
are
intend
work is
are
intend
work is
e.
safety,
ficult to
ment of
n 80 PRI
control
n 40 PRI
e sites.
control
n 20 PRI
ake sites.
control
f
R
(t
th
F
S
S
E
L
C
D
) Investment D
Measure
Recommended Asset U
aking into account det
hroughout RIIO-GD1)
inancial
Safety
Security of Supply
Environmental
Level of Risk
Comments
Decision
Figure 23.4: Investme
Decision
Upgrades
terioration
O
co
thr
NG
S
sup
st
im
Rea
No
an
after
leg
ent decision for A19A-2
Option 1 (do Noth
0
Ongoing increasing main
osts and potential indir
rough theft and damag
equiement.
N’s Health & Safety po
Slight increase in risk o
pply, particularly deterio
tands and housing whi
mpact the gas supply eq
N/A
asonably High, increasi
RIIO-GD1.
ot recommended – too
d would result in extra
r RIIO-GD1. Potential b
geslation and H&S imp
N/A
23: Buildings/Civils Re
ing) Op
80 P
Buil
Gover
ntenance
ect costs
ge to toher
T
olicy is reduce risk to a
of loss of
orating pipe
ich could
quipment
Security
civils o
ng through R
much risk
workload
breeches of
plications.
Ideal so
for the
feels it
through
ebuild and Refurbishme
111
ption 2 (Top Tier Appro
PRI sites (‘Other’ Civils
ldings), All Offtakes. Di
rnors in line with curren
Total investment: £28m
s low as reasonably pr
y of supply maintained
on major sites improved
new’ condition
N/A
Risk as low as possible
olution for the network
e customer. The netwo
could manage this leve
hout RIIO-GD1. High w
2
ent
ach) Option
s and
strict
nt PCR
40 buildin
civils on
Offtakes
Offtakes
m Tota
ractible. Some areas ne
upgrades. (DSEAR).
d, with all
d to ‘as
Security
critical civ
to
e. Accpetab
network.
k but not
ork also
el of risk
workload.
Satisfies c
risk redcu
not impac
o
3 (Middle Tier Approac
ngs on PRI sites, 40 ‘ot
PRI sites. 11 buildings
and eight ‘other’ civils
s. District governors in
with current PCR
al Investment: £15.4m
eed improving to achie
of supply maintained, w
vils on major sites impro
o ‘as new’ condition
N/A
ble level of risk retained
Risk level reduced thro
RIIO-GD1.
customer and network
ued, but at a cost whic
t customer. Considere
optimum solution.
1
ch) Option 4
ther’
s on
s on
line
20 buildings
civils on PRI
Offtakes an
Offtakes. D
wit
Total i
eve this. Legislative com
with
oved
Security of
critical sites. O
deteriorati
d by
ough
Unacceptable
network, inc
with
h will
ed the
This is unac
and security
allow leg
buildin
(Low Tier Approach)
on PRI sites, 20 ‘othe
sites. eight buildings o
nd four ‘other’ civils on
District governors in line
h current PCR
nvestment: £13m
mpliance requires safet
f supply maintained at
Other sites monitored f
ion. Failure can affect
supply.
N/A
e level of risk retained b
creasing through RIIO-
GD1.
cceptable from a safety
y aspect and would no
eslative upgrades to
ngs to take place.
3
r’
on
e
ty
for
by
-
y
ot
Investme
The netw
allow the
safety an
g) Offta
With Inv
18 P
O
h) PRI’s
With Inv
18 P
P
23.4 A selecti
with the
the build
departm
Data gat
23.5 NGN are
alternativ
requirem
• Sm
nu
• Pl
112
ent Decision:
work believes
e network to
nd security of
akes
vestment
Asset catego
PRI’s above 7 ba
Offtakes – Civils
s
vestment
Asset catego
PRI’s above 7 ba
PRI’s – Civils
Selectionion criteria wi
criticality of t
dings on Offta
ment, this can
thered from M
Innovatioe committed
ve options th
ments on site.
mart Water to
umber of our
lastic pipe sta
: Option Thre
s that this is t
bring sites in
f sites and w
ries
ar
ries
ar
n Criteria ill be used to
the site will be
akes is determ
be used by t
Modus and V
on to innovation
at use alterna
. These includ
o deter entry
r sites with se
ands, to prev
e
he best optio
n line with leg
ill allow the re
Criticality In
Low
Medium
High
Very High
Criticality In
Low
Medium
High
Very High
prioritise wo
e used to ass
mined from s
the Asset Ris
Visual inspect
n and as part
ative technolo
de:
y to the site. W
ecurity risks;
vent corrosio
on for the cus
islation where
emoval and u
dex Asset dis
HI1
8
11
h 16
dex Asset d
HI1
40
40
h 90
ork. A combin
sign workload
surveys under
sk Manageme
tions will be u
of this invest
ogies to prov
We have cont
n spreading t
stomer and fo
e applicable,
upgrade of cr
stribution based
R
HI2
distribution base
R
HI2
nation of the c
ds . For exam
rtaken by NG
ent team to p
used to suppo
tment we are
vide some or
tract negotiat
to the pipelin
or the networ
provide critic
ritical equipm
d on estimated a
reporting yea
emaining Usefu
Expected (50%
HI3
13
22
ed on estimated
March 2011
emaining Usefu
Expected (50%
HI3
63
63
11
condition of t
mple, analysis
GN’s Asset H
prioritise the w
ort these dec
e currently co
all of the pre
ted with sma
ne;
rk. This optio
cal updates t
ment.
asset health inde
r
l Life
%)
HI4
5
5
remaining usefu
l Life
%)
HI4
40
40
42
the asset, co
s of the cond
ealth and Da
work.
cisions.
onsidering a r
e-heating
art water to co
on will
to ensure
ex in current
HI5
ul life at 31
HI5
ombined
dition of
ata
range of
over a
• D
w
• Va
Offtake
Coldstream
Humbleton
Guyzance
Saltwick
Corbridge
Thrintoft
Wetheral
Melkinthor
Keld
Bishop Au
Cowpen B
Little Burd
Elton
Tow Law
Baldersby
Pickering
Burley ban
Pannal
Towton
Asselby
Rawcliffe
Paull
Ganstead
Total
Figure 23.5
ifferent manu
weather; and
arious types
Location
m
n
rpe
ckland N
Bewley
en
nk
N
5: Offtake buildin
ufacturers of G
of ducting to
Size
S
S
S
L
M
M
M
M
S
NG LOCATION
L
L
L
S
M
L
S
L
L
L
M
NG LOCATION
L
ngs know to con
GRP Kiosks
o prevent cop
Kiosk
1
1
1
1
1
1
6
ntain asbestos
to determine
pper theft.
Buildings
Small Me
1
2
1
1
1
2
1
1
1
4
2
17
e which can w
edium Larg
2
1
2
1
1
1
2
2 1
1
2
1
1
1
2
15 6
withstand incr
e
4 (s
5 (3 -
2 (L
4 (2 -
113
reasingly haz
Bund covers
2
2 (11m long)
small rolling tent
4 (8m long)
2 (10m long)
- 8m long, 2 - 6m
Large rolling tent
12m long, 2 - 9
zardous
type)
m long)
t type)
9m long)
A19A
24.1 Within R
equipme
reductio
Gashold
2009/10
Gas t
Figure 2
24.2
a) Curre
Gas con
introduct
require t
Monoeth
effective
better un
review.
Consequ
These ag
iron syst
Conditio
• M
an
• Th
th
le
• W
te
• W
• Fi
co
re
• C
A
• PE
un
• G
m
in
• Re
sa
114
A-24: Ga
The SpecRIIO, NGN pla
ent to ensure
n from the le
er demolition
0 prices £m
treatment
4.1: RIIO-
Justificati
ent Price C
nditioning trea
tion of Natura
reatment, a w
hylene Glycol
ness on the n
nderstand flo
uence of Failu
ging assets o
tem leading to
n Assessmen
Monoethylene
nd the optimu
he aim would
hese levels ar
akage?
Would increas
erm low level
What would be
xed condition
ompliance wi
eplacement, r
urrent mainte
through finan
E installation
ndertake a ne
as Condition
maximising eff
centive;
esearch cond
aturation, leak
as Treatm
ific Requians to upgrad
the optimum
ad/yarn joints
n strategy wil
13/14 14
0.1 0
-GD1 Gas Treatm
ion for In
ontrol Run
atment has p
al Gas. Howe
wholesale rev
l (MEG) units
network has
ows and drop
ure
often fail or be
o increased l
nt
Glycol (MEG
um average s
d be to review
re or were ac
sed saturation
saturation on
e the environ
nings are agi
ith maintenan
refurbishmen
enance costs
ncial assessm
has an impa
etwork analys
ning currently
fective gas tre
dition of exist
kage prevent
ment
irement tde existing ga
m level of MEG
s in the iron m
l require equi
4/15 15/16
0.1 0.1
ment Expenditu
vestment
Rates
roved an effe
ever, since a
view of condi
have remain
reduced, dev
pout rates pro
ecome ineffe
eakage and
G) has leakage
saturation lev
w how these
hieved how e
n levels actua
n lead yarn jo
nmental bene
ng assets ful
nce regimes.
t, relocation
s are not fully
ment must be
act on the flow
sis assessme
attracts regu
eatment to e
ting joints rem
tion and seala
throughouas treatment
G saturation
mains popula
ipment to be
16/17
0.1
re
t
ective method
large section
tioning is now
ed in place fo
velopments a
ovide NGN w
ctive the resu
possible exte
e reduction p
vel is deemed
levels are ach
effective are t
ally reduce lea
oint and were
fits in using a
l assessment
Consideratio
and effective
understood
e undertaken
w of gas as d
ent on flow le
ulatory incent
nsure reduct
moved as par
ant effectiven
ut RIIO-GDplant and eq
levels and co
ation. In addit
relocated.
17/18 18
0.1 0
d of leakage
ns of network
w required.
or a consider
and innovatio
with an opport
ult is reductio
ernal PRE’s.
properties wh
d to be 40%;
hieved, maint
they in a mixe
akage? What
e would it be e
an alternative
t is required o
on into what w
eness of this e
to a sufficien
n covering this
does low dem
evels for exist
tives investiga
ion in emissio
rt of mains re
ness;
D1 uipment and
ontinued succ
tion the imple
8/19 19/20
0.1 0.1
control for ov
ks are now PE
rable amount
on in equipme
tunity to unde
on of percent
hen saturation
tained or ach
ed material n
t has been th
economical t
to MEG;
on maintenan
would be the
equipment;
nt level to und
s and alterna
mand levels re
ing equipmen
ation will take
ons while still
eplacement p
d install new
cessful leaka
ementation of
0 20/21
0.1
ver 40 years
E, which doe
t of time and
ent our ability
ertake a deta
age MEG in t
n levels exce
hievable. Give
network in red
he impact of l
to reseal joint
nce costs an
e implications
dertake a full
ative approac
esulting in “d
nt;
e place into
l achieving th
programme to
age
f the
Total
0.8
since the
es not
their
y to
ailed
the cast
ed 50%
en that
ducing
long
ts;
d
s of
financial.
ches;
rop out”
he
o assess
• Ta
lo
• D
on
24.3
Requirem
Installatio
Road Sid
Mobile S
Move sam
Total cos
Figure 2
Out of 26
MEG can
with a hi
small bu
allow effe
• Se
• Sa
• Re
• Le
24.4 Do Noth
Cost effe
increase
24.5 Wholesa
24.6 As part o
technolo
We will a
2 G
(M
G
s
an
th
argeted main
onger purely M
elivery system
n increasing t
Cost Bene
ments
on of new Fogge
de Fogger Unit
pray Unit
mple points
st:
4.2: Cost Benef
65 Low Pres
n have a sign
gh populatio
t leak hotspo
ective planne
ecurity of sup
afety, Reduc
eliability, effe
eakage reduc
Other Op
ing
ectiveness of
ed leakage.
Selectionale review will
Innovatioof the Total N
ogy and the d
also look at th
Gas Conditioning
MEG) – To optim
use of Monoethy
Glycol (MEG) as
swellent on the n
nd maximise the
hat is achieved th
the use of ME
ns spraying ha
MEG based,
ms have also
the use of thi
efit Analy
er Units
fit Analysis
ssure Network
nificant impac
n of larger dia
ots around th
ed replaceme
pply to our cu
ed leakage;
ctive manage
ction incentiv
tions Con
f current prac
n Criteria l inform NGN
on Network Man
development
he most effec
Study
mize the
ylene
a joint
netork
benefit
hrough
EG
Apr 1
yea
as undergon
more environ
o much impro
is technology
ysis
Networks
30
30
30
ks NGN prop
ct. These will
ameter pipes
he whole netw
ent.
ustomers;
ement of agin
ves.
nsidered
ctice become
N on focused
agement app
of roadside u
ctive use of m
13/2
ars
Environm
of waste
by the N
to redu
Safety
Efficien
cost
e some signi
nmental friend
oved over the
y as an altern
Numb
pose only to a
be the large
s. We also wi
work this will
ng mains; and
es less and im
approach.
proach a revie
units without
mobile units a
mental – reduce
e MEG disposed
Network. Optimi
uce leakage and
environment
y – reduction in
ncy Benefits – re
assoicaited with
ficant develo
dly and less h
e past 20 yea
native to whol
ber Per Network
2
1
3
7
assess aroun
r network wit
sh to deploy
have an imm
d
mpact of MEG
ew will also t
the need for
adopting new
the amount
d of annually
sing its use
impact on
.
escapes.
eduction in
h repairs.
M
op over recen
harmful to sta
rs. Investigat
lesale MEG c
k Unit
5,5
7,0
8,0
1,1
nd 30 of the le
th significant
3 mobile spr
mediate impac
G becomes n
ake place on
electricity su
w or innovative
Safety
Asset
Management
Environment
115
nt years and is
aff; and
tion is to take
conditioning.
Cost Tot
500 33
000 21
000 2
100 23
£7
eakiest netwo
CI lead yarn
ray units to ta
ct on escape
negligible lead
n the use of n
upplies being
e materials.
£50,000 S
Eq
M
Int
s no
e place
tal Cost
30,000
10,000
4,000
31,000
95,000
orks that
joints
arget
s and
ding to
new
need.
uppliers of
quipment &
Material, UK
and
ernationally
A19A
25.1 The netw
rural loca
activities
risk of inj
and cont
in are inc
or deter
NGN has
predomi
security
formal co
equipme
Pannal a
the Cent
Departm
possible
would in
need to
2009/10
Site
Figure 2
a) CPNI
Following
has two
(Offtakes
further re
the CPN
counter
(ARC) to
b) CCTV
Discussi
the risk o
effective
(Offtakes
network
locations
images f
116
A-25: Sit
Introductwork has a la
ations. Due to
s in and aroun
juring themse
trol of the ga
creasing acro
such attacks
s maintained
nately focuse
has increase
ommunicatio
ent to install.
and Bishop A
tre for Protec
ment for Energ
terrorist atta
clude the ins
be monitored
0 prices £m
security
5.1: RIIO-
I locations
g the nationa
locations wit
s) Bishop Auc
equirements
NI visits the sit
terrorism me
o monitor site
V
ons with poli
of third party
measure sho
s). This progr
and assessin
s after RIIO-G
from the CCT
te Securi
tion arge number o
o this spread
nd the locatio
elves, but als
as distribution
oss all industr
s on our asse
its security e
ed on standa
ed the concer
ons and advic
Auckland Offta
ction of Natio
gy and Clima
ack. Security
stallation of pa
d and mainta
13/14 14
2.0 5
-GD1 Site Secur
al categorisat
th the networ
ckland is who
for additiona
te annually. T
easures signif
-specific alar
ce and secur
entry and the
ould be taken
ramme is aim
ng the impac
GD1. This pro
TV system.
ity Rebu
of sites sprea
d of assets, lo
ons. Should p
so pose a risk
n system. Wit
ries, to deter
ets.
equipment th
ard perimeter
rns on gas in
ce from CPNI
akes have be
nal Infrastruc
ate Change (D
Strategy for a
assive detect
ained.
4/15 15/16
5.0 0.9
rity Expenditure
ion of all loca
rk designated
olly contained
al work by NG
This visit has
ficantly, includ
rms and threa
rity forces ha
eft from site.
n to reduce in
med at fitting s
ct with possib
ogramme will
ild and R
ad over a larg
ocations are u
people succe
k to the publi
th increased v
this, the bus
hroughout PC
fencing. How
frastructure s
I on the both
een listed and
cture (CPNI) a
DECC) interes
all sites is to
tion devices a
16/17
0.9
ations in the U
d as category
d within a hig
GN. Pannal is
resulted in a
ding the desi
ats.
ave indicated
NGN has ac
ntrusion, thef
suitable devic
bilities of cont
utilise the ca
Refurbis
ge geographi
under varying
eed in breach
c at large and
value of meta
siness is cont
CR1 using exi
wever in rece
sites and sub
the level of s
d recognised
and as such f
st to improve
reduce perim
and surveillan
17/18 18
0.9 0
UK critical to
y three sites (
gher category
an NGN ass
recommend
gn and build
that the use
cknowledged
ft and damag
ces to all of th
tinued roll ou
apabilities of t
shment
cal area inclu
g levels of thr
hing security
d a very real
als random a
tinually invest
isting industry
ent years the
bsequently we
security meas
as a Catego
fall under the
e security and
meter breache
nce equipme
8/19 19/20
0.9 0.9
National Infra
(Pannal and B
y National Gri
set. As part o
ation to upgr
of an Alarm
of CCTV dev
that a more
ge from its cr
he Offtake loc
t throughout
the ARC inst
uding both ur
reat from illeg
measures the
threat to the
and opportun
tigating ways
y standards t
national focu
e have receiv
sures and the
ory three loca
remit of The
d deterrent to
es and theft.
ent to site. Th
0 20/21
0.9
astructure (C
Bishop Auckl
d location so
of the CNI pro
rade security
Receiving Ce
vices could d
proactive an
itical location
cations acros
other vulnera
allation to mo
rban and
gal
ey are at
supply
e break-
to stop
this
us on
ved
e type of
ations by
e
o
This
his would
Total
12.6
CNI) NGN
land
o has no
ocess,
and
entre
decrease
d cost
ns
ss the
able
onitor
Figure 25
c) Curre
NGN has
levels. A
as recog
reviewed
25.2 Within R
the repla
No.
1 P
2 S
3 3
4 B
Total:
Figure 2
This exp
Phasing
Cat 3 DE
Requirem
(Pannal o
Civils – fe
(Offtakes
Civils – fe
(>7Bar P
Civils – fe
(<7Bar) a
Capex
Figure 2
The Pan
upgradin
criteria:
5.2: Fencing con
ent Price Co
s been worki
As the fence li
gnition of incr
d and sites ev
RIIO-GD1RIIO-GD1 NGN
acement/upg
Pannal Offtake in
Seven fences on
35 fences on abo
Below 7Bar PRIs
5.3: Security Up
penditure will
ECC
ment
offtake Site)
ences
s)
ences
PRI)
ences
and CCTV
5.4: RIIO-GD1 S
nal CNI secu
ng a site of th
ndition example
ontrol Run
ng over prev
nes have det
reased threat
valuated by o
InvestmeN has propos
rade of the fo
n line with CNI re
Offtake sites un
ove 7Bar PRI’s,
s and CCTV prov
pgrades Summa
be phased in
2013/14 20
2.0
2.0
Security Upgrad
urity upgrade
his size under
s
Rates
vious years to
teriorated du
t of damage a
operational st
ent Reqused to invest
ollowing:
equirements and
nit cost £100k p
unit cost £50k p
vision
ary
n line with the
014/15 2015
4.0
0.1 0.
0.25 0.2
0.25 0.6
5.0 0.
e Expenditure B
project finan
rtaken by Nat
o renew its pe
e to repeated
and theft from
taff (and secu
irement £12.8m on s
Description
d including the a
er fence
per site
e following be
5/16 2016/1
.1 0.10
20 0.20
60 0.60
.9 0.9
Brekadown
nce has been
tional Grid. T
erimeter fenc
d repairs and
m locations. P
urity advisers
security impr
larm response c
elow;
17 2017/18
0 0.10
0 0.20
0 0.60
0.9
established
These costs b
ing stock to c
d exposure to
Policies and s
if required).
rovement pro
centre:
2018/19
0.10
0.20
0.60
0.9
based on the
break down a
117
current appro
o the element
site requirem
ojects. This in
2019/20
0.10
0.20
0.60
0.9
e previous co
against the fo
oved
s, and
ents are
cludes
Cost
£6.5m
£0.7m
£1.7m
£3.7m
£12.6m
2020/21
0.10
0.20
0.60
0.9
osts of
ollowing
Cat 3 DE
TOTAL
Figure 2
Only 30%
this inves
25.3 The pred
health on
a) Critic
Fencing
boundar
unautho
of opera
b) Heal
Health a
matter e
c) Agei
Many of
significan
the netw
upgrade
discussio
The infor
supporte
MODUS
be used
25.4 Following
were po
categorie
and inve
118
ECC Requiremen
5.5: Typical CN
% of this inve
stment are th
The Invesdominant driv
nly account f
cality Asse
on sites has
ry for security
rised individu
ational equipm
lth Assessm
assessments
expert assess
ng Assets w
the fence lin
nt signs of de
work as a resu
ed to a high s
ons with exte
rmation gathe
ed by indepe
system. This
to support in
Network g the criticalit
pulated for P
es. Fencing a
estmetn shas
nt (Pannal Offtak
T
AR
I Site Security U
estment is ba
hird part drive
stment Jover behind th
for approxima
ssment
been classifi
y, failure of th
uals gaining a
ment.
ment
for this asset
sment.
with Deter
es within the
eterioration. I
ult of the curr
security speci
ernal security
ered on fence
ndent survey
s system pro
nvestment de
Risk ty and asset
PRIs and Offta
associated w
been based
ke Site)
Technical Des
Civil Design
Technical Constr
Civil Construc
RC Design/Cons
pgrade Cost
ased on cond
en or influenc
ourney is investment
ately 30%.
ed as very hi
e fence line c
access to site
t are based o
riorating Co
network are
n addition du
rent econom
fication in line
experts.
e health is pr
ys and field b
vides daily re
ecisions.
health asses
akes. Civils w
with belwo sev
on current ru
sign
n
ruction
tion
struction
dition upgrade
ced.
t is the CNI u
igh on the cri
can lead to s
e and loss of
on inspection
ondition
now at the e
ue to the incr
ic climate and
e with NGN’s
redominantly
ased evidenc
eal time photo
ssments unde
were a sub ca
ven bar sites
un rates.
es of existing
upgrade work
iticality index
ignificant pro
gas supply th
reports rece
end of their u
eased securi
d price of me
s policy requi
through subj
ce. Field base
os transmitte
ertaken by th
ategory of the
is not include
fence lines.
k and the CC
. Fencing form
oblems throug
hrough dama
eived from the
seful lives an
ty threat bein
etal many of t
rements and
ject matter e
ed evidence
ed via mobile
e NGN the a
ese two prima
ed within the
Costs
£140,0
£160,0
£2,100,
£3,100,
£1,000,
£6,500,
All other asp
CTV work. Ass
ms the prima
gh danger to
age, theft and
e field and su
nd are showin
ng experience
the fences ne
d advise gain
xpert assess
provided via
phones whic
sset health ta
ary asset hea
e asset health
s
000
000
000
000
000
000
ects of
set
ary
d misuse
ubject
ng
ed by
eed to be
through
sment
NGN’s
ch can
ables
alth
h tables
a) Offta
Current C
18 Of
Of
Without
18 Of
Of
Deteriora
current c
b) PRI’s
Current C
18 PR
PR
akes
Condition
Asset categorie
fftakes
fftakes – Civils
Investment
Asset categorie
fftakes
fftakes – Civils
ation rates ha
condition.
s
Condition
Asset categorie
RI’s above 7Bar
RI’s – Civils
es
es
ave been bas
es
r
Criticality In
Low
Medium
High
Very Hig
Criticality In
Low
Medium
High
Very Hig
sed on subjec
Criticality In
Low
Medium
High
Very Hig
ndex As
H
m
h 1
ndex Ass
H
m
h 1
ct matter exp
ndex As
H
m
h 5
sset distribution b
HI1 HI2
0
set distribution b
HI1 HI2
0
pert assessm
sset distribution b
HI1 HI2
50
based on estima
current reportin
Asset health i
HI3
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
ent based on
based on estima
current reportin
Asset health i
HI3
51
119
ated asset healt
ng year
ndex
HI4
11
ted remaining us
011
eful Life
0%)
HI4
3
n historical tre
ated asset healt
ng year
ndex
HI4
42
h index in
HI5
seful life at
HI5
8
ends and
h index in
HI5
Without
18 PR
PR
Deteriora
current c
c) Inve
Option O
This w
and d
confo
Option T
• 10
• Pa
• 50
• In
en
• Re
Inves
Option T
• Se
• Pa
• 35
• Re
• Re
Inves
Option F
• Th
• 15
• Re
• Re
Inves
120
Investment
Asset categorie
RI’s above 7Bar
RI’s – Civils
ation rates ha
condition.
stment Op
One: Do Noth
would result
damages and
ormance of re
Two: Upgrade
0 Offtake fen
annal CNI;
0 above 7Ba
crease the c
nhanced stan
etain CCTV p
stment cost: c
Three: Upgrad
even Offtake
annal CNI;
5 above 7Ba
etain the curr
etain CCTV p
stment cost: c
our: Upgrade
hree Offtake
5 above 7Ba
etain the curr
etain CCTV p
stment cost: c
es
r
ave been bas
tions
ing
in an unacce
d a possible i
ecommendat
e:
ces to ensure
r PRI fences;
urrent below
ndard; and
provision.
circa £17m
de:
fences to en
r PRI fences;
rent below 7B
povision.
circa £12.8m
e:
fences to ens
r PRI fences;
rent below 7B
povision.
circa £10m
Criticality In
Low
Medium
High
Very Hig
sed on subjec
eptable level o
ncrease entr
tions from Go
e all are in th
7Bar run rat
nsure all are in
Bar run rate;
m
sure all are in
Bar run rate;
ndex Ass
H
m
h 5
ct matter exp
of risk on the
ry by unautho
overnment Se
e HI1 asset h
e to upgrade
n the HI1 ass
and
n the HI1 ass
and
set distribution b
HI1 HI2
50
pert assessm
e network and
orised person
ecurity Servic
health bracke
e a significant
set health bra
et health bra
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
11
ent based on
d no reductio
ns. It would a
ces in relation
et at the end
t amount of fe
acket at the e
cket at the e
ted remaining us
011
eful Life
0%)
HI4
47
n historical tre
on in intrusion
also mean non
n to assets of
of RIIO-GD1
ences to an
end of RIIO-G
nd of RIIO-G
seful life at
HI5
35
ends and
n, theft
n-
f CNI.
;
GD1;
D1;
d) Inv
Recomm
(taking i
through
Financia
Safety
Security
Environm
Level of
Comme
Decision
Figure
vestment decis
Measure
mended Asset Upgrad
nto account deteriorat
out RIIO-GD1)
al
y of Supply
mental
f Risk
ents
n
e 25.6: Investment dec
ion
es
ion
Significant
through th
Increase th
equipme
gover
Not recomm
cision A19A-25: Site S
Option 1
(Do Nothing)
0
t increase to loss of su
hird party damage thef
interference.
N/A
eft and potential dama
ent, non compliance w
rnment CNI standard.
mended – too much ris
non compliance
N/A
ecurity Rebuild and Re
10 Offtake
increase belo
If this investment is
pply
ft or
Minimal p
age to
with
sk and Ideal solu
customer. T
this level
efurbishment
Option 2
es, Panal CNI, 50 abov
ow 7Bar run rate, retain
Total investment: £17
s not adequate there ar
potential to impact secu
N/A
Low
ution for the network b
The network also feels
of risk throughout RIIO
workload.
2
ve 7Bar PRI’s,
n CCTV provision 7
7m
re significant safety imp
urity of supply
ut not for the
it could manage
O-GD1. High
121
Option 3
7 Offtakes, Panal CNI
7Bar PRI’s, retain belo
rate, retain CCTV p
Total Investment:
plication from insufficie
Risk to security of
manageable
N/A
Medium
Risk can be manage
acceptable lev
1
, 35 above
ow 7Bar run
provision
Three
7Bar
£12.8
ent security on site.
supply
e
Signi
thro
ed to an
vel.
his is
Option 4
e Offtakes, Panal CNI,
r PRI’s, increase below
rate, retain CCTV prov
Total investment: £1
ificant increase to loss
ugh third party damag
interference.
N/A
High
unacceptable from a s
security aspect.
3
15 above
w 7Bar run
vision
0m
of supply
e theft or
safety and
25.5 The netw
allow the
from the
a) Offta
With Inv
18 Of
Of
b) PRI’s
With Inv
18 PR
PR
25.6 A selecti
with the
surveys
individua
criticality
NGN cu
enhance
25.7 NGN are
appropri
122
Investmework believes
e network to
eft and site br
akes
vestment
Asset categorie
fftakes
fftakes – Civils
s
vestment
Asset categorie
RI’s above 7 bar
RI’s – Civils
Selectionion criteria wi
criticality of t
on all it’s abo
al site caracte
y of the site (h
rrently has a
e the current
Innovatioe committed
iate technolo
ent Decisis that this is t
ensure secur
reakins. It will
es
es
r
n Criteria ill be used to
the site will be
ove 7Bar site
eristics. For e
how many cu
rolling progra
selection me
on to innovation
gy for fencing
on: Optiohe best optio
rity of the site
l also allow th
Criticality In
Low
Medium
High
Very Hig
Criticality In
Low
Medium
High
Very Hig
prioritise wo
e used to ass
s to better de
example the a
ustomers, the
amme for fen
ethodology.
n and as part
g upgrades.
on Threeon for the cus
es are mainta
he network to
ndex Ass
H
m
h 1
ndex Ass
H
m
h 8
ork. A combin
sign workload
efine the asse
are the sites i
e equipment o
ncing upgrade
of this invest
stomer and fo
anced as wee
o undertake t
set distribution b
HI1 HI2
8
set distribution b
HI1 HI2
85
nation of the c
ds. The netw
et condition.
s located in (
on the site (O
es and it is e
tment the net
or the networ
el as detering
the CNI upgra
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
based on estimat
31 March 20
Remaining Use
Expected (50
HI3
11
condition of t
work is curren
This will then
(vanaddlisum
Offtake vs PR
nvisaged tha
twork will con
rk. This optio
g the increasi
ade works.
ted remaining us
011
eful Life
0%)
HI4
3
ted remaining us
011
eful Life
0%)
HI4
47
the asset, co
ntly undertakin
n be coupled
m/theft risk), th
RI etc).
at this proces
nsider the lat
on will
ng risk
seful life at
HI5
seful life at
HI5
ombined
ng site
with the
he
s will
test most
A19A
26.1 Within th
System C
ensure th
2009/10
Alarm M
Figure 2
26.2
a) Curre
During th
settings
This resu
A numbe
tool has
legacy d
also bee
significan
The frag
Engineer
Manage
an integr
Consequ
It is impo
appropri
Offtake i
same tim
tempera
A well-m
on the o
critical e
One of th
decision
critical e
A-26: Ala
The Speche RIIO-GD1
Control and d
hey align to s
0 prices £m
Management
6.1: RIIO-
Justificati
ent Price C
he transfer of
review was c
ulted in a num
er of bespoke
been develo
database has
en observed t
nt manual inp
mented natu
ring Equipme
ment Framew
rated approa
uence of Failu
ortant that all
iate level of im
s certainly ne
me and will en
ature low alarm
managed, cor
verall health
quipment, lea
he current ala
to prioritise r
quipment. An
arm Man
ific Requiperiod NGN
develop a ne
safe and effic
13/14 14
0.60 0
-GD1 Alarm Man
ion for In
ontrol Run
f control from
carried out by
mber of incon
e legacy syst
ped in anoth
been review
that the repo
put required t
ure of the curr
ent and Mate
work docume
ach.
ure
alarms recei
mportance an
ecessary, will
ngender an m
m, which ma
rectly design
and performa
ading to impr
arm reports i
resources to
n example of
nageme
irement tproposes to
ew automated
cient performa
4/15 15/16
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nagement Expen
vestment
Rates
m National Gr
y a number o
nsistencies in
tems are in us
er different sy
ed by interna
rting tool is e
to produce th
rent systems
rials Users’ A
entation whic
ived in Syste
nd finally are
have a high
more immedia
ay not be nec
ed, alarm ma
ance of the a
roved and tim
dentifies the
reduce alarm
f the report is
nt
throughoureplace the c
d reporting ap
ance recomm
16/17
0.40
nditure
t
id Gas (NGG
of different ind
n the current a
se to manage
ystem to pro
al audit who h
extremely time
he reports.
falls outside
Association (E
ch follows the
m Control are
responded to
importance,
ate response
cessary at all.
anagement s
asset. Offline
mely investme
top 20 telem
ms, as well as
s shown below
ut RIIO-GDcurrent alarm
pplication. Al
mendations.
17/18 18
0.20 0
G) to NGN Sys
dividuals in H
alarm setting
e alarm settin
ovide manage
have recomm
e consuming
industry bes
EEMUA). NGN
e EEMUA guid
e firstly, nece
o correctly. A
compared w
e by all parties
ystem provid
analysis can
ent decisions
metry points, b
s potentially i
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D1 m manageme
l alarm settin
8/19 19/20
0.00 0.00
stem Control
inckley, both
gs.
ngs and an o
ement informa
mended its’ re
and at risk o
st practice as
NSC have de
delines and id
essary at all, t
A slam shut a
with other alar
s, than a gas
des online op
also identify
s.
by type, whic
dentify reocc
123
nt software u
ngs will be rev
0 20/21
0.00
(NGNSC) an
h NGN and N
offline alarm re
ation. Recent
eplacement.
of error due to
s documented
eveloped Alar
dentified the
then have the
alarm at a nat
rms generate
sholder site am
erational info
multiple failu
ch can assist
curring faults
used in
viewed to
Total
2.1
n alarm
GG staff.
eporting
tly, the
It has
o
d by the
rm
need for
e
tional
ed at the
mbient
ormation
res of
with a
on
Figure 26
Conditio
Alarms c
Asset He
alarm ma
efficient
Another
time. The
following
As a res
being re
and imp
due to th
now retu
Figure 26
124
6.2: Top 20 alar
n Assessmen
can be an ind
ealth program
anagement a
investment d
key benefit is
e number of
g the impact o
ult of the wor
peatedly gen
rove this pos
he implement
urning to 201
6.3: Alarm Activ
rm summary by
nt
dication of de
m and can oc
are that it lead
decisions.
s the reductio
alarms prese
of poor alarm
rk carried out
nerated by fau
sition. Alarm a
tation of the
0 levels.
vity 2010-2011
point type
eteriorating as
ccur before a
ds to a pro-a
on in the num
ented to an o
m manageme
t to date by N
ults of the ass
activity, show
new System
sset performa
an equipment
active approa
mber of alarm
operator is the
ent in recent s
NGNSC, the
sets, has red
wn on the righ
Control softw
ance, as dem
t fault is mani
ch to mainte
ms being pres
e subject of s
serious incide
number of al
duced but furt
ht hand axis i
ware during J
monstrated w
fest. The key
nance planni
sented to the
significant ind
ents in the oil
larms presen
ther work is n
n the chart b
June and July
within our Pre-
y benefits of g
ng, resulting
operator at a
dustry debate
and gas ind
nted and the a
necessary to
below, rose in
y, but the tre
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good
in
any one
e
ustry.
alarms
maintain
n 2011
nd is
The focu
alarms in
complete
optimum
workload
The curr
not integ
manually
other ma
manage
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within th
The proj
review, r
party co
26.3 The proc
activity b
action by
supports
The corr
finance.
negative
It is also
environm
points an
importan
significan
a) Othe
Continue
while ma
it would
Do Noth
This is d
to see in
26.4 Initial dis
and also
necessa
design s
complete
us is now also
ndicating exc
e review and
m performanc
d.
rent software
grated within
y and outside
anagement d
ment applica
wledge of the
e existing co
ect is expect
resulting in an
ntract rates f
Cost Benecedure of sele
by control roo
y operational
s the case to
rect alarm pro
Unnecessary
e impact on th
becoming ev
ment in which
nd the choice
nt. It is import
nt commercia
er Options C
e to develop
anually extrac
not provide a
ing:
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ndustry best p
Selectionscussions hav
o with the soft
ary to carry ou
specification f
e the work.
o beginning t
cursions outs
further inves
ce of the netw
tools used to
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e the existing
data. It is ther
ation.
e processes
ontrol system
ted to be deli
n expenditure
from recent p
efit Analyecting which
om. Each ala
staff. This m
replace obso
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y call outs an
he business w
vident that th
h System Con
e of correct s
tant that use
al costs.
Considered
off line syste
cting data fro
any real time
ecause of the
practice in ali
n Criteria ve taken plac
tware develo
ut a feasibility
for the new a
to be directed
ide commerc
stigation into
work and an i
o manage the
nal control sy
control softw
refore necess
is within Syst
program will
vered in a ph
e profile show
projects asso
ysis data points t
rm has a spe
may be a call o
olete equipm
procedures
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which good a
he control sof
ntrol will play
settings to pro
rs have the c
d
ms. This is d
m the online
commercial
e reputational
gnment with
ce with the de
oper who des
y study to def
alarm manage
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cial incentives
the classifica
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e alarm settin
ystem. Manag
ware. It is ext
sary to develo
tem Control b
l mean the en
hased manne
wn below. Bu
ciated with S
to alarm and
ecific respons
out to attend
ment in a time
leads to the e
t expenditure
alarm manag
ftware will be
a significant
ovide informa
correct manag
iscounted be
system and
information.
l risk which w
EEMUA 191
eveloper of th
signed the bu
fine the busin
ement softwa
performance
s in the future
ation and prio
rm managem
ng process a
gement inform
remely time c
op and build
but the devel
ngagement o
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udget costs h
SOMSA Exit.
the then set
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ly manner.
efficient man
e in equipmen
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e important in
role. The sel
ation to opera
gement tools
ecause of the
importing int
would be in je
and other in
he existing op
usiness applic
ness requirem
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alarms and i
e. This is lead
oritisation of a
ment applicat
and report on
mation is cur
consuming to
an improved
lopment of in
of a third party
account of a
have been co
ting appropri
urrently desig
ovide additio
agement of b
nt at the wron
mitigate.
n the emergin
ection of new
ators will bec
s to mitigate t
e inherent risk
o an off-line
eopardy with
ndustry docu
perational co
cations for NG
ments and pr
lecting an su
125
s expected to
ding to the ne
alarms to ach
ion to manag
received ala
rrently produc
o produce th
, integrated a
ntegrated soft
y software de
planned tele
ompiled using
iate alarms d
gned to prom
nal informatio
both resource
ng time, both
ng commercia
w commercia
come increas
the potentially
k of data corr
product. Sign
the HSE who
ments.
ntrol product
GNSC. It will
oduce a deta
uitable develo
o include
eed for a
hieve
ge this
arms are
ced
is and
alarm
tware
eveloper.
metry
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rives the
mote
on which
es and
h have a
al
al data
singly
y
ruption
nificantly,
o expect
t SCX6
be
ailed
oper to
26.5 EEMUA
recognis
coorpora
committ
compan
member
proposa
material
The alarm
when the
applicati
responsi
stages b
126
Innovatiohave produc
sed as indust
ate members
ee has review
ies with dispa
rs of EEMUA
als are discus
and taken pa
m manageme
e operation r
on could aut
ible engineer
but the import
on ced two guidi
ry best pract
s of EEMUA a
wed EEMUA
arate assets,
make this or
sed at organ
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ent policy sh
eaches the li
ogenerate fa
s and avoid d
tance of goo
ng documen
tice by the HS
and NGNSC
191 and the
rather than t
rganisation le
nised events a
sion forums .
ould be used
mits of norm
ault reports ba
duplication of
od alarm man
ts for alarm m
SE who wrot
are a membe
latest edition
the traditiona
eading edge in
and training s
d to develop a
al performan
ased on oper
f effort and re
agement is e
management
e the forward
er of the tech
n includes sp
al chemical pr
n the field of
sessions at w
alarms on the
ce. It is feasi
rator actions
educe errors.
essential to co
t, EEMUA 19
d to each pub
hnical standa
ecific guidelin
rocess indust
alarm manag
which NGN ha
e asset which
ble that an al
and issue a t
. This innovat
ontinue with
1 and 201, w
blication. NG
rds committe
nes for utility
try. The indus
gement and n
ave presente
h inform the b
larm manage
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this developm
which are
N are
ee. This
stry
novel
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business,
ement
l to
early
ment.
A19A
27.1 Within th
Control a
Howeve
Interrupt
2009/10
Demand
Managem
Figure 2
27.2
a) Curre
The curr
in their C
risk durin
Time to
Consequ
The man
a major
Time to
insufficie
required
Previous
manage
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and aske
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develope
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and exit
shedding
A-27: Pro
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and develop
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0 prices £m
ment
7.1: RIIO-
Justificati
ent Price C
rent applicatio
Control Room
ng SOMSA E
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uence of Failu
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local or natio
Fail, uses a d
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tible gas volu
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to provide su
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nificance of th
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ntation for th
pported platfo
reform. The
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oject 12
ific Requiperiod NGN
a new integr
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13/14 14
0.60 0
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ion for In
ontrol Run
on used by S
m. The produc
Exit and no al
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data file from
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interruptible c
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he manageme
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ptable.
nt
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he offline, uns
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reputational i
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: Deman
irement tproposes to
ated applicat
consider the
4/15 15/16
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Management Ex
vestment
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ct was adopt
lowance was
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gas demand
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tion of the ga
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contracts at
wever, these
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ent of deman
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supported, ex
need to take
impact to NG
also taking a
nd Mana
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tion. The prim
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16/17
0.40
penditure
t
rol is product
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s made to fac
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has not been
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mary driver is
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17/18 18
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previously u
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em Control. T
ecast when,
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contracts wh
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arlier stage in
under these
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heets. A new
t the new com
essary interru
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t
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the safe ope
commercial r
8/19 19/20
0.00 0.00
sed by Natio
trol (NGNSC)
opment or rep
demand is a
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during the da
culate the gas
hich could be
October 201
a significant a
and reduction
y constraint w
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ergency cond
the demand
circumstance
off line Time t
pgrade. It wa
receive any s
w integrated a
mmercial asp
ption and pre
d restoration
127
ware used in S
eration of the
regimes of
0 20/21
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onal Grid Gas
to reduce bu
placement of
approached, o
offline progra
ay, there wou
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amount of
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in number a
ditions.
reduction pr
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pects of interr
eventable firm
n costs, nece
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network.
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2.1
s (NGG)
usiness
f the
or under
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uld be
duction
ally
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ively lost
ontacted
and
rocess.
ore be
dsheet
and
required
ruption
m load
ssary to
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scrutiny
27.3 The netw
be signif
business
decision
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recognis
contactin
significan
has to b
significan
a) Othe
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disperse
program
discount
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exists as
27.4 It will be
detailed
complete
27.5 The new
reductio
minimisin
somethin
taken wi
128
n a safe syste
by external p
Cost Benework only has
ficant. One co
s is £3.8M. T
and have th
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se that it is th
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nt sums of m
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e the existing
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th greater cla
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efit Analys a small num
ontract has a
herefore whe
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money to conv
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product. The
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unclear whet
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orted program
n Criteria o carry out a
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ent informatio
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spreadsheet
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uptible contra
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interruption t
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tion Reform,
ere interruptib
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udy to define
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iciency.
n accurate inf
acts. Howeve
5K per day. T
the network h
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ble before the
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purpose and
nal control so
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cation before
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pplication wit
and by using
formation and
er the cost of
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decision if re
more likely.
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developed. T
excludes co
oftware.
s requirement
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ness in manag
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d be able to s
f interruption
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equired to do
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t NGN will be
ies have paid
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eloped by a n
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lity of the
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A19A
28.1 Within th
applicati
2009/10
Offtake re
Figure 2
28.2 The proc
ensure o
maintain
of the Of
Revision
between
paramet
The new
a) Curre
No allow
Consequ
Each yea
to meet
Notificat
incentive
in accord
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excursio
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the impa
results a
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period.
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To fully u
a 3rd par
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SOMSA
A-28: Off
The Speche RIIO-GD1
on to manag
0 prices £m
eform
8.1: RIIO-
Justificaticedures and
operational sa
ned that posit
fftake Reform
s to Section
n NGN and N
ters. These sp
w application
ent Price C
wance was m
uence of Failu
ar NGN Syste
forecasted L
ions (OPN), h
e rules about
dance with th
on, the comm
ons above the
pacity which is
rges for NTS
act to the bus
are shown in t
rges for NTS
ply with Secti
Reform, it is n
n Assessmen
understand th
rty developer
costs have b
Exit. The pha
ftake Re
ific Requiperiod NGN
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13/14 14
0.60 0
-GD1 Offtake Re
ion for Incontrol softw
afety and effic
tion but did n
m, Flat and Fle
I and J of the
National Grid G
pecifically rela
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ontrol Run
ade to facilita
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em Control (N
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both the con
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mercial aspec
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siness, if the
the financial a
Exit (Flex) ar
ions I and J o
necessary to
nt
he implication
.
een compiled
asing is plann
eform
irement tproposes to
ance and co
4/15 15/16
.90 0.00
eform Expenditu
vestmentware applicati
ciently. The b
not take into a
ex Capacity a
e Uniform Ne
Gas with rega
ate to NGN’s
o manage the
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ate developm
NGNSC) neg
s and on a da
end to physic
ntent and the
viewed as no
ct of this relat
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n from the fla
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re as yet unkn
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ned to take in
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16/17
0.40
ure
t ions used in S
business app
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arrangement
etwork Code
ard to the ex
s managemen
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ally take the
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at volume up
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been in plac
ion of the do
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and mitigate t
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party contrac
nto account t
ut RIIO-GDexisting cont
plications of O
17/18 18
0.20 0
System Cont
lications deve
new complian
s.
now docume
xchange of inf
nt of gas offta
ns.
bove applicat
eive capacity
orm NGG, by
gas through
ach OPN sub
ce and report
ves the daily
lat Capacity w
to 22:00hrs
ace in Octobe
ce over the la
cument.
pected to be
the cost of ov
tem Control f
cial arrangem
ct rates from
the introduct
D1 trol software
Offtake Refor
8/19 19/20
0.00 0.00
trol are curren
eloped as pa
nce and com
ent the comm
formation and
aken from th
tions in the c
, flows and p
way of Offta
each offtake
bmitted to NG
ted to Ofgem
charges to b
which is the d
in any one da
er 2012. NGN
st two years
introduced w
verrun charg
functionality.
ments it will be
recent proje
ion of NTS Ex
129
to provide an
rm.
0 20/21
0.00
ntly designed
art of SOMSA
mmercial impl
mercial relatio
d agreed ope
e National Sy
urrent PCR.
pressures from
ke Profile
. There are a
GG and not o
m.
be imposed fo
daily quantity
ay.
NSC have ca
of operation.
within the PC
es proposed
e necessary t
cts associate
xit (Flex) char
n
Total
2.1
d to
A Exit
ications
onship
erational
ystem.
m NGG,
agreed
operating
or
y and
alculated
. The
CR
by
to involve
ed with
rges.
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NGN bu
28.3 Any Ove
• 8
• 8
• 1.
Recent a
NGN, if t
• 20
• 20
a) Othe
Develop
in-house
wish to s
describe
Do Noth
Discount
business
28.4 It will be
detailed
the work
28.5 It is envis
the cons
be chang
performa
allowing
130
ensure a com
siness.
Cost Beneerruns in NTS
* highest pric
* highest res
.1 * the highe
analysis of his
the proposed
009/10 - £2.2
010/11 - £0.9
er Options C
offline solutio
e software de
see integrate
ed in the indu
ing
ted because
s.
Selectionnecessary to
design spec
k.
Innovatiosaged that th
sequential ch
ged to avoid
ance against
a proactive i
mplete solutio
efit AnalyS Exit (Flat) bo
ce paid in any
serve price at
est price paid
storical date
d Offtake Ref
2M;
9M.
Considered
ons outside t
esign capabili
d system wit
ustry guideline
of the cost r
n Criteria o carry out a
ification for th
on his application
arge to the b
the cost imp
agreed Flat a
ntervention t
on to the Net
ysis ookings will b
y of the relea
that Exit Poi
d for Exit Cap
has indicated
form charges
d
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ty and an ex
h a consisten
e EMMUA 20
isk to the inc
feasibility stu
he new applic
n will inform t
business. With
pact. Currentl
and Flex qua
o moderate t
twork Code o
be charged ba
ase mechanis
nt; and
pacity through
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s had been in
control softwa
pectation fro
nt user interfa
01.
curring overru
udy to define
cation before
the operator
h this informa
ly NGNSC ca
antities, but th
the daily ope
obligations an
ased on the h
sms at that Ex
h an Exit Cap
owing charge
place.
are. This has
m recent disc
ace. This is th
un charges w
the business
e selecting a s
to the likeliho
ation the ope
arry out after
he new applic
rational strate
nd commerci
highest of the
xit Point;
pacity Manag
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cussion with
he preferred
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s requirement
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erational strat
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cation will pro
egy.
ial impact on
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ement Action
ve been incur
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the HSE that
best practice
e significant t
ts and produ
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capacity over
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ysis of Offtak
ovide the info
the
rices:
n.
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t they
e as
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ce a
mplete
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ke
ormation
A19A
29.1 Telemetr
manage
There ar
Outstatio
The Site
compon
outstatio
outstatio
philosop
The Com
to “Hillto
but signi
review th
latest tec
The Tele
sets out
broken d
2009/10
E&I Com
E&I Outs
TOTAL
Figure 2
a) Curre
All Electr
replacem
are a sm
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29.2 NGN mu
key to th
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confiden
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critical to
A-29: Te
The Specry is used on
ment of gas f
re two main a
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ent and we m
ons on these
ons on the be
phy.
mmunication
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ificant chang
he existing co
chnologies.
emetry Outsta
our overall fo
down over th
Prices £m
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tations
9.1: RIIO-GD1 T
ent Run Ra
ronic equipm
ment is availa
mall number o
e are small nu
spares can b
g the more cr
op communic
ficult to supp
system and l
Justificatiust be able to
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m to comply w
nce.
uence of Failu
of a telemetry
o allow Syste
lemetry
ific Requi148 above 7
flows and mo
areas of the te
“Communicat
Outstation is o
must be able
sites which w
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system links
atellite. The U
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ation and Co
orecasts for ‘
e RIIO-GD1 p
13/14
0.05
0
0.05
Telemetry & Hillto
ates
ment becomes
able. The Ulys
of different su
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itical sites uti
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ion for Ino monitor and
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& Hillto
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twork to ensu
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ved with com
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period:
14/15
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ipment will ne
echnologies
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nce obligation
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o manage the
op Upgra
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he network fo
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considered q
rate long term
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ure NGN has
station to NGN
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mmunication s
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15/16 16/
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penditure
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rted current p
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or faults.
uding System
quite reliable,
m viability, it is
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s a long term
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30 years old a
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arter system c
t required is s
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037 0
14 0.15
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s stop being
spoke system
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osed to replac
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product.
ommunication
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re security of
ues and safet
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m Control), th
the outstatio
s proposed to
be used to s
viable struct
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and currently
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could be intro
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8 18/19
0
0.15
0.15
manufacture
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ket. The outst
ce all above 7
he next regula
ns equipment
ention is to co
em Control t
ese key asset
supply, site s
ty concerns,
e and storage
131
ontrol, allowin
e site “Telem
on is a critical
o replace all
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ured replace
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nd it is propos
oduced to uti
set Health 22
w the investm
19/20
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ed and no dir
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atory period,
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20/21
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rect
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29.3 The equ
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132
on leads to no
ng of the odo
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Criticality
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HI1 HI
12
23
sset distribution
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ate the Netwo
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ble spares, m
oposed prog
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31 March 2
Asset Health
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ork safely, op
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2021
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mated asset heal
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125
23
pportunity are
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&I Telemetry com
hing is not via
plans to keep
mplementatio
ion over a lon
ogether, thoug
hout any cos
ticality – With
ries
ol
mms
ries
ol
ticality - With
ries
ol
mms
able option, t
p the system
on
nger period h
gh spares wi
st.
h Investment
Criticality
Low
Medi
Hig
Very H
Criticality
Low
Medi
Hig
Very H
hout Investm
Criticality
Low
Medi
Hig
Very H
this equipme
s operationa
has been con
ll be made av
t
y Index A
w
um
gh
High
y Index A
w
um
gh
High
ent
y Index A
w
um
gh
High
nt will fail at s
l.
nsidered, but
vailable for be
sset distribution
HI1 HI
125
23
Asset distribution
HI1 HI
125
23
sset distribution
HI1 HI
some point a
discounted a
elow 7Bar sit
based on estim
31 March 2
Asset Health
Expected (5
2 HI3
n based on estim
current reporti
Asset Health
Expected (5
2 HI3
based on estim
31 March 2
Asset Health
Expected (5
2 HI3
125
23
133
and NGN mus
as the system
tes to ensure
mated asset heal
2021
Index
50%)
HI4
mated asset heal
ng year
Index
50%)
HI4
mated asset heal
2021
Index
50%)
HI4
st be
ms need
e there
th index at
HI5
lth index in
HI5
th index at
HI5
22 Te
Ou
29.4 The repla
obtain th
29.5 This is a
up with t
134
Asset catego
lemetry & Contr
utstations
Selectionacement of t
he best long t
Innovatiovery speciali
the most cos
ries
ol
n Criteria he equipmen
term solution
on ist market all
st effective so
Criticality
Low
Medi
Hig
Very H
nt has been p
n and identify
available com
olution.
y Index A
w
um
gh
High
phased based
the best fit e
mmunication
Asset distribution
HI1 HI
d on an intial
equipment.
s systems/st
n based on estim
current reporti
Asset Health
Expected (5
2 HI3
system revie
rategy’s will b
mated asset heal
ng year
Index
50%)
HI4
ew/design rep
be reviewed
lth index in
HI5
125
23
port to
to come
A19A
30.1 Plant and
activities
metering
The inve
£m 20
Plant and
Figure 3
30.2 In order
the gas s
typically
This cate
distributi
It does n
equipme
Typically
and asso
stopping
regulato
replacem
repair, th
Apprenti
tools, an
employe
New tec
replacem
a) Curre
To suitab
& 2011 t
Year
2009
2010
2011
2012
Figure 3
Based o
describe
annum.
A-30: C2
The Specd equipment
s, and include
g gauges, etc
estment ident
009/10 prices
d equipment
0: RIIO-GD1 Pla
Justificatito maintain t
supply system
include mob
egory of equi
ion network,
not include th
ent used by th
y this equipm
ociated items
g equipment,
r maintenanc
ment on a reg
hey are replac
ices over the
nd equipment
ed.
chnologies an
ment through
ent Price C
bly assess th
to identify an
0.1: GDPCR1 P
on the historic
ed in the prev
8: Plant
ific Requi will typically
e water pump
c.
tified is £600,
13/14
0.6
ant & Equipment
ion for Inhe network in
m will be req
bile assets and
pment cover
and includes
he major item
he operatives
ent would inc
s of plant to e
joint fusion e
ce, as well as
gular basis as
ced. As well
coming year
t, to enable th
nd ways of wo
wear and te
ontrol Run
e amount of
accurate 20
Plant & Equipme
cal data provi
vious section,
t and Equ
irement tinclude thos
ps, pressure
,000 per year
14/15 15/
0.6 0
t Expenditure
vestmentn a fit for pur
uired to be re
d tools used
rs all aspects
s Installation,
ms of operatio
s on the netw
clude hand to
enable them t
equipment, p
s some items
s they becom
as this the ne
rs. As these A
hem to carry
orking often i
ear.
Rates
investment r
12 figure:
nt Expenditure
ided, the exp
, once they a
uipment
throughoue mobile ass
gauges, hand
r over the per
/16 16/17
.6 0.6
t pose conditio
eplaced as th
to support o
of the netwo
Operation, E
onal plant on t
work, and any
ools such as
to carry out w
pressure gaug
to monitor e
me worn or da
etwork has re
Apprentices b
out their dut
involve invest
required for th
penditure on r
are past econ
t
ut RIIO-GDets and tools
d tools, flow
riod to replac
17/18
0.6
on, items of p
hey wear out
operational ac
ork’s activities
Emergency, R
the network,
y related item
may be foun
work safely o
ges, specialis
quipment pe
amaged in us
ecently emba
become qua
ties in the var
tment in new
his sector we
Total Spen
£338,788.0
£273,809.0
£350,000.0
£660,000 (Bud
replacement
nomical repair
D1 s used to sup
stopping equ
ce items iden
18/19 19/
0.6 0.
plant not dire
or break dow
ctivities.
s in running a
Repair and M
but rather th
ms to assist th
nd in a craftsm
on the networ
st maintenanc
erformance. T
se, and when
arked on a pr
lified, they wi
rious function
w plant and eq
e reviewed sp
d
00
00
00
dget)
of plant & eq
r, is the order
135
pport operatio
uipment, and
tified as othe
/20 20/21
.6 0.6
ectly associat
wn. These ite
a modern gas
aintenance a
he tools and
hem in their ta
man’s posses
rk, such as flo
ce equipmen
These tools d
n beyond eco
rocess of rec
ll require sets
ns where they
quipment as
pends in 2009
quipment as
r of £600K p
onal
d
er Capex.
Total
4.8
ed with
ems will
s
activities.
asks.
ssion,
ow
t for
o require
onomical
ruiting
s of
y will be
well as
9, 2010
er
This incr
• Re
• Re
• H
Consequ
If an item
a replace
having to
jobs may
may resu
Conditio
These as
Howeve
effective
30.3 The cost
repair ve
any “one
a) Reso
Purchas
out by in
training o
Do Noth
As indica
replaced
needed.
demonst
30.4 New too
innovatio
to do so
136
rease to circa
ecent appren
eplace obsol
igher specific
uence of Failu
m fails, then it
ement is sou
o be put in pl
y have to be
ult in injury to
n Assessmen
ssets are insp
r, all assets w
in their use.
Cost Benet benefit will b
ersus costs o
e-off” mainten
ources and
ing will be via
ndividual supp
on items of p
ing:
ated above, a
d, then this w
For this reas
trate value fo
Innovatiools and impro
on process. I
, and new te
Data cap
work an
equipme
it replace
pace wit
a £600,000 b
ntice intake p
ete equipme
cation equipm
ure
t could mean
ght. If one fa
lace. For non
rescheduled
o operatives.
nt
pected as pa
will require re
efit Analybe assessing
f replacment
nance or inst
Purchasing
a the Procure
pliers owing t
plant and equ
assets will ev
will result in job
son, then a d
or money for o
on oved ways of
n some insta
chniques hav
pture in the fi
d is seen as
ent does tend
es, and requ
th developme
budget each y
program there
ent within the
ment required
n that it is una
ils in service,
n-gas items, f
once a repla
The network
art of a mainte
placement at
ysis g the criticality
. Also, the op
allation work
g
ement section
to the numbe
uipment to en
ventually fail, e
bs being can
o nothing op
our custome
working are
ances, plant m
ve been intro
ield with PDA
a way of gett
d to become
ires update a
ents.
year during R
efore all will re
current work
d due to more
available for u
this could re
failures usual
acement is av
k does not ge
enance regim
t some point,
y of the item
ption of hiring
k.
n using only a
ers of certain
nsure its safe
even when m
celled and to
ption is consid
rs.
always being
may be replac
oduced to sup
A’s and mobi
ting data bac
outdated qu
and replacem
RIIO-GD1 is b
equire to be f
kforce; and
e Innovative w
use, and may
esult in leakag
ly result in th
vailable. In so
enerally carry
me, and repai
, to prevent fa
to be availab
g equipment w
approved sup
items purcha
and efficient
maintained at
ools and equi
dered as not
g considered
ced where it
pport the driv
le technology
ck to support
uicker than m
ment of items
because of th
fully equippe
working meth
y prolong jobs
ge or an eme
e item not be
ome cases, fa
a stock of sp
ired where ec
ailures in serv
ble when need
will be consid
ppliers. Any t
ased, and the
use in the fie
a high level.
pment not be
acceptable a
by NGN as p
is found to b
ve to higher c
y is at the ver
t office as qui
echanical or
to enable tec
he following re
d once traine
hods.
s unnecessar
ergency proce
eing available
ailure of items
pare items fo
conomically v
vice, and be
ded, and the
dered when d
training will b
e need for sp
eld by the op
If they are no
eing available
and does not
part of their
be more econ
cost efficienc
ry forefront o
ick as possib
legacy syste
chnology to k
easons:
ed;
rily whilst
edure
e and
s of plant
r use.
viable.
cost
costs of
doing
e carried
pecialist
eratives..
ot
e when
t
nomical
ies.
f our field
ble. IT
ms that
keep
A19A
31.1 Through
distributi
and requ
to be fit f
Coatings
below gr
resistanc
applied w
Pipe sys
require a
become
Where d
joints or
fitted and
Anticipat
£m 2009
Auxillary
Figure 3
31.2 To ensur
associat
potentia
NGN ph
Protectio
As coatin
is reduce
assets a
Pipe stan
ground p
Electrica
isolation
Due to o
Our curr
A-31: Au
The Specout the RIIO-
ion network c
uire ongoing
for purpose.
s need to be
round coating
ce to corrosio
where benefi
stems are sup
attention to e
corrosion tra
different mate
kits and whe
d effective.
ted spend ov
9/10 prices
equipment
1.1: RIIO-GD1 A
Justificatire a high leve
ed with the d
lly harmful eff
ilosophy for t
on (CP) syste
ngs age they
ed as CP cur
age.
nds corrode
pipe open to
al legislation r
and decoup
ongoing inves
rent assessm
uxiliary E
ific Requi-GD1 period,
consisting of
upgrading of
maintained a
g or above g
on. Where we
cial.
pported abov
nsure that th
aps.
erials are in di
ere isolation is
ver the RIIO-G
13/14
0.3
Auxiliary Equipm
ion for Inel of safety an
distribution of
fects of corro
this is to app
ems.
y deteriorate t
rrent increase
and become
the elements
equires equa
plers need to
stment in this
ment of > 2Ba
Equipme
irement t NGN will ne
mains >2Ba
f Cathodic Pr
and improved
round paint s
e have CP sy
ve ground by
ey move whe
rect contact,
s not possibl
GD1 period is
14/15 15/
0.3 0
ment Expenditure
vestmentnd reliability in
f natural gas
osion.
ly good quali
thus the prot
es to protect
e water traps
s requires reg
al potential bo
be fitted whe
s asset catego
ar mains is sh
ent
throughoueed to invest i
r (Intermediat
rotection (CP
d to ensure th
systems, to e
ystems install
pipe stands
en required a
, we need to
e for safety re
s:
/16 16/17
.3 0.3
e
t n operation, i
is designed,
ty protective
ective measu
the coatings
under the pip
gular paint m
onding betwe
ere appropria
ory these ass
own below.
ut RIIO-GDin various pro
te Pipelines) w
) systems to
hat they prote
ensure that th
ed then remo
and these ar
and to ensure
ensure elect
easons, we n
17/18
0.3
it is essential
installed and
coatings, ba
ures such as
s. The ongoin
pe and beco
aintenance.
een metals an
ate.
sets are in a g
D1 otective meas
which are pre
ensure that t
ect the asset
he CP remain
ote monitorin
re exposed to
e that they do
rical isolation
need to ensu
18/19 19/
0.3 0.
that buried s
d commission
acked up by e
CP systems
g investment
me corrosion
nd this drains
good and se
137
sures of its
edominately
these assets
t whether this
ns effective in
ng systems w
o the elemen
o not hold wa
n through Isol
re CP insulat
/20 20/21
.3 0.3
steel pipewor
ned to withsta
effective Cath
and equipme
t cycle increa
n hot spots. A
s the CP syst
rviceable con
Steel
continue
s is
n
will be
nts and
ater and
ation
tors are
Total
2.1
rk
and the
hodic
ent’s life
ases as
Above
tem so
ndition.
11 Ma
Consequ
These as
• Lo
• D
• D
Deteriora
Without
effective
TR’s and
needs to
Asset He
11 Dis
With inve
138
Asset Catego
ains above 2Bar
uence of Failu
ssets usually
oss of life;
amage to pro
isruption to li
ation
effective CP,
CP and kee
d anodes nee
o be maintain
ealth and Crit
Asset categorie
stribution Mains
estment over
ories
r
ure
fail as a leak
operty; and
fe.
, steel system
p Current Ou
ed replacing a
ned and moni
ticality - With
es
> 2Bar
V
r the RIIO-GD
Criticality
Low
Medi
Hig
Very H
k. The conseq
ms will corrod
utputs at acce
as they end t
itored to ensu
h Investment
Criticality
Index
H
Low
Medium
High 1
Very High 7
D1 period the
y Index As
w
um
gh
High
quences of w
de. Coatings
eptable levels
their life and e
ure their effec
Asset distribu
estimated asse
31 Mar
Asset he
Expecte
HI1 HI2 H
32 283
75 187
e steel mains
sset distribution
HI1 HI2
0 0
0 0
132 28
75 18
which can be:
need to be m
s.
electrical isol
ctiveness.
ution based on
et health index at
ch 2017
ealth index
ed (50%)
HI3 HI4 H
population w
based on estim
31 March 2
Asset Health
2 HI3
0 0
0 0
3 0
7 0
maintained in
ation from ot
t
Asset
estimated
Re
HI5 HI1 H
132 2
75 1
will remain wit
mated asset heal
2021
Index
HI4
0
0
0
0
order to have
ther metals/m
t distribution bas
d remaining usef
March 2021
emaining useful
Expected (50%
HI2 HI3 H
83
87
thin the HI2 c
th index at
HI5
0
0
0
0
e
materials
sed on
ul life at 31
life
%)
HI4 HI5
category.
Asset He
11 Dis
Conditio
Steel pip
CP data
assets.
Figure 3
When th
produce
expensiv
Paint sys
is used t
ealth and Crit
Asset categorie
stribution Mains
n Assessmen
peline system
base store an
1.2: CP monitor
hese assets fa
e effective ma
ve work or re
stems, coatin
to assess futu
ticality - With
es
> 2Bar
V
nt
ms are monito
nd report on
ring Database
ail, an except
aintenance an
placemnt at
ng faults and
ure maintena
hout Investm
Criticality
Index
H
Low
Medium
High 13
Very High 75
ored for effect
non-complia
tion report is
nd monitoring
a later date.
pipe stands
ance requirem
ent
Asset distribu
estimated asse
31 Mar
Asset he
Expecte
HI1 HI2 H
2 26
17
tive CP to en
ance, from th
produced wi
g regimes. Of
are picked u
ments.
ution based on
et health index at
ch 2017
ealth index
ed (50%)
HI3 HI4 H
0 23
2 15
sure complia
is data, we c
ithin the data
ften early det
p during insp
t
Asset
estimate
Re
HI5 HI1 H
132
75
ance with Pol
can assess th
abase. The da
tection and s
pections and
139
t distribution bas
ed remaining use
31 March 2021
emaining useful
Expected (50%
HI2 HI3 H
24
16
licies & Proce
he condition o
ata is analyse
imple action
audits and fa
sed on
eful life at
life
%)
HI4 HI5
3 40
1 26
edures.
of these
ed to
will save
ault data
Figure 3
b) Othe
Do Noth
The Do N
pipeline
• Lo
• Lo
• D
• N
This is th
31.3 NGN wil
allow pro
which re
Remote
manual m
Safety is
more vu
Figure 3
140
1.3: Typical seiz
er Options
ing:
Nothing optio
failure resulti
oss of Supply
oss of Life;
amage to Bu
on Complian
he reason for
Innovatiol deploy remo
oactive monit
epresents bes
monitoring re
monitoring of
s another fact
lnerable to ac
1.4: Typical test
zed pipe stand
Considered
on is not viab
ng in:
y;
uildings & Pro
nce with regu
r chosing the
on ote monitorin
toring enablin
st value to the
educes our C
f CP systems
tor as most o
ccidents.
t post remote mo
d
ble because w
operty; and
lation.
option above
ng where a be
ng us to reac
e customer.
Carbon Footp
s.
of these test f
onitoring unit.
without effect
e.
enefit is reco
ct instantly to
print as vast d
facilities are a
tive CP, steel
gnised. Rem
faults as they
distances are
at road side lo
systems will
ote monitorin
y occur, savi
e driven by te
ocations leav
corrode and
ng of CP syst
ng time and
echnicians to
ving ‘lone wo
d lead to
tems
money
carry out
rkers’
A19A
32.1 Since the
to mana
expectat
32.2 The mos
investiga
a) Curre
NGN for
incurred
managin
b) RIIO
Expendit
The brea
• £8
• £2
• £1
• £1
Expendit
Year
Expendit
Figure 3
A-32: LanExp
History e formation o
ging its land
tions, avoidin
Forecast st recent regu
ation being un
ent Formul
recast, during
. This is in res
ng the risk as
-GD1
ture identified
ak-down of th
8.5m for the
2m for statut
1m for monito
1m for decom
ture will be sp
ture
2.1: RIIO-GD1 S
nd Remependitur
of NGN in 20
portfolio. To
ng statutory re
ulatory conta
ndertaken by
la Period
g the remainin
sponse to inc
sociated with
d for RIIO-GD
his expenditu
statutory rem
ory remediat
oring; and
mmissioning/
pread evenly
13/14
£1.5
Statutory Land R
ediationre
05, NGN has
date we hav
emediation a
ct related to
y the regulato
ng years of th
creased regu
h the statutor
D1 is £12.5 m
ure consists o
mediation of h
ion of any low
/re-commissio
y across the fo
14/15
£1.5
Remediation Exp
n Statuto
s taken a resp
e been succe
and hence mi
the NGN site
or. Results an
he current for
ulatory action
ry liability of th
million.
of:
high and med
wer risk sites
oning of plan
ormula period
15/16 1
£1.5 £
penditure
ory Liabil
ponsible, tho
essful in man
nimised expe
e at Penrith. T
nd decisions a
rmula period
and reflects
he contamina
dium/high risk
identified an
nt associated
d.
6/17 17/1
£1.6 £1.6
lity/Risk
ough principa
naging the reg
enditure.
This resulted
are awaited.
, a further co
a more proa
ated land por
k environmen
d ‘forced’ by
with remedia
8 18/19
6 £1.6
141
k
ally reactive, a
gulators
in an intrusiv
st of £1 millio
active approa
rtfolio.
ntally sensitive
y the regulato
ation projects
19/20
£1.6
approach
ve site
on will be
ch to
e sites;
ors;
s.
20/21
£1.6
A19A
33.1 We have
RIIO-GD
current a
these ch
a) Nove
When w
surround
processe
the pres
work.
As set o
Compan
correlatio
demonst
of the co
premises
Year
“Off Gas”
“Mixed O
“On Gas
Overall
Figure 3
This ana
connect
uncertain
populatio
of the ap
Given th
fuel poor
obliged t
connect
voucher
risk. Any
efficiency
b) Deve
Towards
one-off f
custome
to expan
As a res
142
A-33: Fu
Summarye increased th
D1 period from
actual costs r
hanges is that
ember Bus
e prepared o
ding our futur
es for identify
ent economic
ut in our bus
ny which com
on with the p
trated signific
ontributory fa
s.
” Areas
Off/On Gas” Area
”
3.1: Fuel poor fo
alysis showed
ion to gas ma
nties that exis
on during RII
pproach we w
e change to
r voucher to
to fund for ea
ion for fuel po
value, this w
y difference b
y incentive an
elopments
s the end of 2
fuel poor cus
ers we have b
nd geographi
ult we are no
el Poor F
y he number of
m 6,500 to 12
rather than th
t our forecas
siness Plan
our Novembe
re poor work
ying our one-
c climate and
iness plan in
mpared at a p
presence of th
cantly higher
actors is that g
as
orecasts
d a potential p
ains and eligi
sted we took
O-GD1. We w
were taking to
the price con
derive the un
ach connectio
oor custome
was not in our
between our a
nd shared wi
since Nov
2011 we mad
tomers. As a
been able to
cally across p
ow forecasting
Forecast
f fuel poor cu
2,000. We ha
he maximum
t costs rema
Forecasts
er Business P
. These inclu
-off fuel poor
d the future o
2010 we com
post code leve
he gas netwo
instances of
gas clearly re
Households
142,661
247,103
2,396,846
2,786,610
population of
ible for the fu
k a conservat
were also mi
o the forecas
ntrol treatmen
nit cost of con
on. This value
rs. We took t
r direct contro
actual costs a
th customers
ember
de changes t
a result we ha
connect. In a
parts of our a
g that during
ts
ustomers we
ave reduced
potential valu
in largely unc
Plan submissi
ded changes
customers, d
of various fun
mmissioned
el and local a
ork. The resu
fuel poverty
emains the ch
f 120,000 fue
uel poor vouc
tive view that
ndful of the o
st unit costs o
nt of fuel poo
nnection as t
e significantly
the view that
ol and therefo
and the vouc
s.
o the delivery
ave seen a sig
addition, dem
area where w
the 2011/12
will aim to co
the unit cost
ue of the fuel
changed at £
on there wer
s to our prima
demand from
ding mechan
a detailed su
authority leve
lts of this sur
in areas with
heapest sour
In Fuel Poverty
55,094
65,668
541,845
662,607
el poor custom
cher to fund th
we would ta
overall costs o
of connection
or connection
his is the ma
y exceeds ou
as we were
ore it was no
cher value wo
y partner and
gnificant incre
mand for com
we have neve
2 and 2012/1
onnect to ma
of connectio
l poor vouche
£14m.
re a number o
ary partner an
m social hous
nisms used to
urvey from the
l the incidenc
rvey (shown b
out gas than
rce of heating
y
mers that co
his connectio
arget connect
of the schem
n.
ns Capex we
aximum amou
ur current act
obligated to f
ot appropriate
ould be subje
d processes f
ease in the vo
mmunity based
r previously u
3 we will con
ains gas durin
on based on o
er. The net re
of uncertainti
nd the under
ing providers
o support fue
e Energy Aud
ce of fuel pov
below) clearly
n areas with g
g for domesti
%
38.6
26.6
22.6
23.8
uld be consid
on. With the
ting around 5
me particularly
used the valu
unt NGN wou
ual unit costs
fund up to th
e for us to ca
ected to the IQ
for identifying
olumes of su
d schemes c
undertaken p
nnect 1,500 a
ng the
our
esult of
es
rlying
s given
el poverty
dit
verty and
y
gas. One
c
dered for
5% of this
y in light
ue of the
uld be
s of
he
rry this
QI
g eligible
uch
continues
projects.
and
1,800 cu
years.
We have
forecast
East has
Whilst un
program
Commun
demand
c) April
In light o
populatio
period in
schemes
2011/12
towards
CERT an
The brea
No. of F
Poor
Connect
Commun
Based
Connect
One Off
Connect
UIP/IGT
Connect
Total
Figure 3
To reduc
cost of c
voucher
rise over
value. W
physicall
We still r
would no
incentive
being un
ustomers res
e also compa
to connect t
s the highest
ncertainties r
mmes it is clea
nity Energy S
under the sc
l 2012 Busi
of these deve
on resulting i
ncreasing from
s as the dead
2 and 2012/1
more one-of
nd CESP.
akdown of th
Fuel
r
ions
11/12
nity
ions
731
ions 668
ions 168
1567
3.2: Fuel poor c
ce the overall
connection fro
value. For co
r time as mor
We don’t expe
ly these sche
remain conce
ot be fully rec
e rate to any
ndertaken for
pectfully, up
ared our Nove
he fewest am
proportion fu
emain amoun
ar this still rem
Solutions and
cheme for the
iness Plan
lopments we
n the forecas
m 6,500 to 1
dline for CES
3. Going forw
ff connection
is forecast w
12/13 13
1024 3
738 1
100 1
1862 1
connections sum
l cost to cust
om £2,190 to
ommunity ba
re challenging
ect the unit co
emes involve
erned that an
coverable by
overspend in
the full vouc
from our Nov
ember busine
mount of fuel
uel poverty in
nt the future
mains an area
discussion w
e foreseeable
Forecasts
e have now in
st number of
2,000. We a
P funding ap
ward into the
s and fewer
workload is sh
3/14 14/15
350 350
000 1000
150 150
500 1500
mmary
tomers of the
o £1,180 bas
ased connect
g schemes ar
osts associat
far less onsit
y movement
NGN and be
n this area if t
cher value.
vember forec
ess plan to th
poor custom
England.
of certain ele
a of focus. M
with gas supp
e future.
ncreased our
fuel poor cus
re currently s
pproaches. Th
RIIO-GD1 p
community b
hown below:
15/16 16
350 3
1000 10
150 1
1500 15
e programme
sed on our ac
ions and UIP
re undertake
ted with one-
te works and
towards the
elieve conside
he sole reaso
casts of just o
hose of the ot
mers of any G
ements of gov
Market intellige
pliers indicate
target from 5
stomers to be
seeing an incr
his is reflecte
eriod we are
based progra
6/17 17/18
350 350
000 1000
50 150
500 1500
e we have red
ctual costs of
P/IGT connec
n and cost w
-offs will follow
do not involv
voucher valu
eration should
on was due t
over 1,200 fo
ther GDNs a
GDN despite t
vernment fun
ence from ou
es there will c
5% to 10% o
e connected
rease in dem
d in our incre
forecasting t
ammes as a r
18/19 19
350 3
1000 10
150 1
1500 15
duced our ave
f connection
tions we fore
will move towa
w the same t
ve laying new
ue above wha
d be given to
o the eligibilit
143
or each of the
nd noted tha
the fact that t
nded fuel pov
ur fuel poor p
continue to b
of the potentia
in the RIIO-G
mand for com
eased forecas
there will be a
esult of the e
9/20 20/21
350 350
000 1000
50 150
500 1500
erage forecas
rather than t
ecast the unit
ards the vouc
trajectory as
w gas mains.
at we have fo
o not applying
ty of the sche
ese two
at NGN
the North
verty
rovider
be strong
al
GD1
munity
sts for
a move
ending of
Total
for
RIIO-
GD1
2800
8000
1200
12000
st unit
he
t cost will
cher
orecast
g the IQI
emes
