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SE
SS
ION
1S
ES
SIO
N1
44
Ris
kIn
form
ed
SE
SS
ION
1S
ES
SIO
N 1
--44
Ris
k-In
form
edR
egul
ator
y Pr
ogra
ms
gy
g
Don
nie
Har
rison
U.S
. Nuc
lear
Reg
ulat
ory
Com
mis
sion
Don
nie.
Har
rison
@nr
c.go
v30
1.41
5.24
70
RIS
KR
ISK
--INFO
RM
ED
RE
GU
LATI
ON
SE
MIN
AR
INFO
RM
ED
RE
GU
LATI
ON
SE
MIN
AR
Mex
ico
City
, Mex
ico
Mex
ico
City
, Mex
ico
Aug
ust 2
7A
ugus
t 27--
31, 2
012
31, 2
012
1
Pres
enta
tion
Out
line
Pres
enta
tion
Out
line
R
isk-
info
rmed
regu
lato
rypr
ogra
ms
in
Ris
kin
form
ed re
gula
tory
pro
gram
s in
se
lect
ed a
reas
of U
SN
RC
regu
lato
ry a
ctiv
ities
R
eact
or O
vers
ight
Pro
cess
(RO
P)
S
igni
fican
ce D
eter
min
atio
n P
roce
ss (S
DP
)g
()
In
cide
nt R
espo
nse
M
aint
enan
ce R
ule
M
itiga
ting
Sys
tem
s P
erfo
rman
ce In
dex
Aug
ust 2
7-31
, 201
2 R
ISK
-INFO
RM
ED
RE
GU
LATI
ON
SE
MIN
AR
2
USN
RC
Rea
ctor
Ove
rsig
htPr
oces
sU
SNR
C R
eact
or O
vers
ight
Pro
cess
P
rovi
des
Ris
k-in
form
ed F
ocus
in In
spec
tions
and
Saf
ety
MA
iii
Man
agem
ent
Act
iviti
es
A
pplie
s G
reat
er R
egul
ator
y A
ttent
ion
to F
acili
ties
with
P
erfo
rman
ceIs
sues
Whi
leM
aint
aini
nga
Bas
eLe
velo
fReg
ulat
ory
Per
form
ance
Issu
es W
hile
Mai
ntai
ning
a B
ase
Leve
l of R
egul
ator
y A
ttent
ion
on P
lant
s Th
at P
erfo
rm W
ell
A
llow
s G
reat
er U
se o
f O
bjec
tive
Mea
sure
s of
Pla
nt P
erfo
rman
ce
G
ives
Tim
ely
and
Und
erst
anda
ble
Ass
essm
ents
of P
lant
P
erfo
rman
ce to
Indu
stry
and
Pub
lic S
take
hold
ers
A
void
s U
nnec
essa
ry R
egul
ator
y B
urde
n
R
espo
nds
to V
iola
tions
in a
Pre
dict
able
and
Con
sist
ent M
anne
r
Aug
ust 2
7-31
, 201
2 R
ISK
-INFO
RM
ED
RE
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LATI
ON
SE
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AR
3
That
Ref
lect
s th
e S
afet
y S
igni
fican
ce o
f the
Vio
latio
ns
REG
ULA
TOR
Y F
RA
MEW
OR
KP
rote
ctP
ublic
Hea
lthan
dS
afet
yN
RC
’s O
vera
llS
afet
y M
issi
onP
rote
ct P
ublic
Hea
lth a
nd S
afet
y as
a R
esul
t of C
ivili
an
Nuc
lear
Pow
er O
pera
tion
Stra
tegi
c P
erfo
rman
ceA
reas
Rea
ctor
Saf
ety
Rad
iatio
n S
afet
yS
afeg
uard
s
Initi
atin
gE
vent
sM
itiga
ting
Sys
tem
sB
arrie
rIn
tegr
ityE
mer
genc
yP
repa
redn
ess
Occ
upat
iona
lR
adia
tion
Saf
ety
Publ
icR
adia
tion
Saf
ety
Phy
sica
lP
rote
ctio
nS
afet
yS
afet
y
Aug
ust 2
7-31
, 201
2 R
ISK
-INFO
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RE
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ON
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AR
4
Use
ofR
isk
Info
rmat
ion
Use
of R
isk
Info
rmat
ion
R
OP
bas
ed o
n a
dual
sys
tem
-per
form
ance
indi
cato
rs (P
Is)
usin
gob
ject
ive
data
and
focu
sed
insp
ectio
nth
atco
mpl
emen
tsus
ing
obje
ctiv
e da
ta, a
nd fo
cuse
d in
spec
tion
that
com
plem
ents
th
e P
Is
U
sed
to id
entif
y P
Is, a
nd to
est
ablis
h th
resh
olds
for r
egul
ator
y y
,g
yac
tion
com
men
sura
te w
ith s
afet
y si
gnifi
canc
e
U
sed
to fo
cus
the
insp
ectio
n pr
ogra
m o
n th
ose
issu
es im
porta
nt
tosa
fety
to s
afet
y
S
igni
fican
ce D
eter
min
atio
n P
roce
ss (S
DP
) was
dev
elop
ed to
as
sess
the
safe
ty s
igni
fican
ce o
f ins
pect
ion
findi
ngs
to
yg
pg
dete
rmin
e th
e ap
prop
riate
regu
lato
ry re
spon
se
U
sed
for a
sses
sing
sig
nific
ance
of p
lant
eve
nts
and
degr
aded
co
nditi
ons
tohe
lpde
term
ine
appr
opria
teN
RC
resp
onse
Aug
ust 2
7-31
, 201
2 R
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-INFO
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RE
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AR
5
cond
ition
s to
hel
p de
term
ine
appr
opria
te N
RC
resp
onse
REA
CTO
R O
VER
SIG
HT
PRO
CES
S
Cor
ners
tone
Cor
ners
tone
Bas
elin
e In
spec
tion
Perf
orm
ance
Indi
cato
rR
esul
ts
Sign
ifica
nce
Sign
ifica
nce
Res
ults
Sign
ifica
nce
Thre
shol
dSi
gnifi
canc
e Th
resh
old
Act
ion
Mat
rix
Aug
ust 2
7-31
, 201
2 R
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-INFO
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6R
egul
ator
y R
espo
nse
Rea
ctor
Saf
ety
Rad
iatio
nS
afet
yS
afeg
uard
s
Perf
orm
ance
Indi
cato
rs in
the
Seve
n C
orne
rsto
nes
Rea
ctor
Saf
ety
Rad
iatio
n S
afet
y
Initi
atin
gE
vent
sM
itiga
ting
Sys
tem
sB
arrie
rIn
tegr
ityE
mer
genc
yP
repa
redn
ess
Occ
upat
iona
lR
adia
tion
Safe
tyP
ublic
R
adia
tion
Safe
ty
Saf
egua
rds
Phy
sica
lP
rote
ctio
nE
vent
sS
yste
ms
Inte
grity
Pre
pare
dnes
sR
adia
tion
Saf
ety
Rad
iatio
n S
afet
yP
rote
ctio
n
Emer
genc
y A
CPo
wer
Syst
emR
eact
or C
oola
ntS
yste
mS
peci
ficD
rill/E
xerc
ise
Occ
upat
iona
lE
xpos
ure
Con
trol
RE
TS/O
DC
MR
adio
logi
cal
Pro
tect
ed A
rea
Unp
lann
ed
Scr
ams
Pow
er S
yste
mU
nava
ilabi
lity
Hig
h Pr
essu
reIn
ject
ion
Syst
emU
nava
ilabi
lity
Sys
tem
Spe
cific
Activ
ity
Rea
ctor
Coo
lant
Sys
tem
Le
akag
e
Perfo
rman
ce
ER
O D
rill
Par
ticip
atio
n
Exp
osur
e C
ontro
lEf
fect
iven
ess
Rad
iolo
gica
lEf
fluen
tsE
quip
men
t
Pers
onne
lSc
reen
ing
Pro
gram
Scra
ms
with
Loss
of N
orm
alH
eat R
emov
al
Hea
t Rem
oval
Syst
emU
nava
ilabi
lity
Res
idal
Hea
t
Ale
rt an
dN
otifi
catio
nS
yste
m
Pro
gram
FFD
/Per
sonn
elR
elia
bilit
yP
rogr
am
Unp
lann
edP
ower
Cha
nge
Res
idua
l Hea
tR
emov
al S
yste
mU
nava
ilabi
lity
Saf
ety
Sys
tem
Func
tiona
lFu
nctio
nal
Failu
res
Aug
ust 2
7-31
, 201
2 R
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7
TYPI
CA
L PE
RFO
RM
AN
CE
IND
ICA
TOR
8
Aug
ust 2
7-31
, 201
2 R
ISK
-INFO
RM
ED
RE
GU
LATI
ON
SE
MIN
AR
SIG
NIF
ICA
NC
E D
ETER
MIN
ATI
ON
PR
OC
ESS
(SD
P)PR
OC
ESS
(SD
P)
Cha
ract
eriz
e th
e si
gnifi
canc
e of
insp
ectio
n fin
ding
s in
sup
port
of
hR
Oi
hP
the
Rea
ctor
Ove
rsig
ht P
roce
ss
P
rovi
de s
take
hold
ers
with
an
obje
ctiv
e an
d co
mm
on fr
amew
ork
for
iti
tht
til
iifi
fiti
fidi
com
mun
icat
ing
the
pote
ntia
l sig
nific
ance
of i
nspe
ctio
n fin
ding
s
P
rovi
de a
bas
is fo
r ass
essm
ent a
nd e
nfor
cem
ent a
ctio
ns
asso
ciat
edw
ithin
spec
tion
findi
ngs
ther
eby
redu
cing
unce
rtain
tyas
soci
ated
with
insp
ectio
n fin
ding
s, th
ereb
y re
duci
ng u
ncer
tain
ty
P
rovi
de th
e st
aff w
ith p
lant
spe
cific
risk
info
rmat
ion
for u
se in
risk
-in
form
ing
the
insp
ectio
npr
ogra
min
form
ing
the
insp
ectio
n pr
ogra
m
SDP
isa
Res
ourc
eA
lloca
tion
Man
agem
entT
ool
Aug
ust 2
7-31
, 201
2 R
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ED
RE
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LATI
ON
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AR
9
SDP
is a
Res
ourc
e A
lloca
tion
Man
agem
ent T
ool
Sign
ifica
nce
Det
erm
inat
ion
Proc
ess
Ove
rvie
w
R
eact
or S
afet
y S
DP
s (m
ostly
risk
-info
rmed
)A
td
htd
fidi
A
t-pow
er a
nd s
hutd
own
findi
ngs
S
peci
al S
DP
s fo
r em
erge
ncy
prep
ared
ness
, fire
pro
tect
ion,
co
ntai
nmen
t int
egrit
y, li
cens
ed o
pera
tor r
equa
lific
atio
n,
stea
m g
ener
ator
tube
inte
grity
, and
pla
nt c
onfig
urat
ion
gg
yp
gco
ntro
l
Spe
nt fu
el p
ool/d
ry c
ask
stor
age
SD
P
R
diti
Sf
t(d
ti
iti
)
Rad
iatio
n S
afet
y (d
eter
min
istic
)
Occ
upat
iona
l Rad
iatio
n S
afet
y
Pub
lic R
adia
tion
Saf
ety
S
afeg
uard
s (r
isk-
info
rmed
)
Phy
sica
l Pro
tect
ion
Aug
ust 2
7-31
, 201
2 R
ISK
-INFO
RM
ED
RE
GU
LATI
ON
SE
MIN
AR
10
LEV
EL O
F SI
GN
IFIC
AN
CE
ASS
OC
IATE
D W
ITH
PE
RFO
RM
AN
CE
IND
ICA
TOR
S A
ND
INSP
ECTI
ON
FI
ND
ING
SG
reen
(nor
mal
rang
e)(
g)
ve
ry lo
w ri
sk s
igni
fican
ce
base
line
insp
ectio
n
Whi
te(o
utsi
deno
rmal
rang
e)
ΔCD
F <
1E-6
Gre
enW
hite
(out
side
nor
mal
rang
e)
low
to m
oder
ate
risk
sign
ifica
nce
su
pple
men
tal i
nspe
ctio
n (IP
950
01)
Yll
1E-6
< Δ
CD
F <
1E-5 W
hite
Yello
w(s
igni
fican
t red
uctio
n in
saf
ety
mar
gin)
su
bsta
ntiv
e ris
k si
gnifi
canc
e
supp
lem
enta
l ins
pect
ion
(IP 9
5002
)1E
-5 <
ΔC
DF
< 1E
-4 Yello
w
Red
(sig
nific
antly
out
side
des
ign
basi
s)
high
risk
sig
nific
ance
su
pple
men
tal i
nspe
ctio
n (IP
950
03)
ΔCD
F >
1E-4
Red
Aug
ust 2
7-31
, 201
2 R
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ED
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AR
11
Rea
ctor
Saf
ety
Sign
ifica
nce
Det
erm
inat
ion
Proc
ess
Th
ree
phas
e pr
oces
sP
h1
iG
Ph
2d/
Ph
3
Pha
se 1
scr
eens
issu
es to
Gre
en, P
hase
2, a
nd/o
r Pha
se 3
P
hase
2 e
valu
ates
issu
es u
sing
pla
nt-s
peci
fic ri
sk-in
form
ed
insp
ectio
n no
tebo
oks
that
are
typi
cally
con
serv
ativ
e, y
et
repr
esen
tativ
e of
lice
nsee
PR
A m
odel
sp
P
hase
3 is
a m
ore
deta
iled
revi
ew u
sing
inde
pend
ent r
isk
tool
s (e
.g.,
SP
AR
mod
els)
Ph
1d
2ll
fd
bi
tit
ffith
P
hase
s 1
and
2 ar
e ge
nera
lly p
erfo
rmed
by
insp
ectio
n st
aff,
with
as
sist
ance
of a
Sen
ior R
eact
or A
naly
st (S
RA
), w
here
nec
essa
ry
P
hase
3is
perfo
rmed
bya
Sen
iorR
eact
orA
naly
stor
othe
rris
k
Pha
se 3
is p
erfo
rmed
by
a S
enio
r Rea
ctor
Ana
lyst
or o
ther
risk
an
alys
t
Aug
ust 2
7-31
, 201
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12
Phas
e 1
SDP
for A
t-Pow
er In
spec
tion
idi
Find
ings
P
rior t
o co
nduc
ting
a P
hase
1 S
cree
ning
, the
per
form
ance
de
ficie
ncy
mus
tbe
ofgr
eate
rtha
nm
inor
sign
ifica
nce
defic
ienc
y m
ust b
e of
gre
ater
than
min
or s
igni
fican
ce
Th
e P
hase
1 S
cree
ning
Wor
kshe
et c
onta
ins
deci
sion
logi
c to
de
term
ine
if th
e de
ficie
ncy
can
be c
hara
cter
ized
as
Gre
en
yw
ithou
t fur
ther
ana
lysi
s
D
efic
ienc
ies
gene
rally
scr
een
to G
reen
if in
itiat
ing
even
t fre
quen
cies
and
tota
lfun
ctio
nof
miti
gatin
gan
dco
ntai
nmen
tfre
quen
cies
and
tota
l fun
ctio
n of
miti
gatin
g an
d co
ntai
nmen
t sy
stem
s ar
e no
t los
t
S
ome
defic
ienc
ies
imm
edia
tely
scr
een
to G
reen
bas
ed o
n th
eir
ylo
w im
pact
to o
vera
ll pl
ant r
isk
(e.g
., ra
diol
ogic
al b
arrie
r sys
tem
s su
ch a
s bu
ildin
g ve
ntila
tion)
Aug
ust 2
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, 201
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ED
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AR
13
Phas
e 2
SDP
for A
t-Pow
er In
spec
tion
idi
Find
ings
S
tep
1-S
elec
t Ini
tiatin
g E
vent
Sce
nario
sp
g
Ste
p 2
-Est
imat
e th
e In
itiat
ing
Eve
nt L
ikel
ihoo
d
Ste
p 3
–D
eter
min
e th
e R
emai
ning
Miti
gatio
n C
apab
ility
S
tep
4 -
Est
imat
e R
isk
Sig
nific
ance
of I
nspe
ctio
n Fi
ndin
gFi
ndin
g
Ste
p 5
–S
cree
n fo
r Ext
erna
l Eve
nt C
ontri
butio
n
Ste
p 6
–S
cree
n fo
r Lar
ge E
arly
Rel
ease
Fre
quen
cy
pg
yq
y(L
ER
F) s
igni
fican
ce
Aug
ust 2
7-31
, 201
2 R
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ED
RE
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AR
14
Phas
e3
SDP
Phas
e 3
SDP
R
isk
Sign
ifica
nce
Estim
atio
n U
sing
Ris
k g
gB
asis
Tha
t Dep
arts
from
the
Phas
e 1
or 2
Pr
oces
s-If
nece
ssar
y,P
hase
3w
illre
fine
orm
odify
,with
If ne
cess
ary,
Pha
se 3
will
refin
e or
mod
ify, w
ith
suffi
cien
t jus
tific
atio
n, th
e ea
rlier
scr
eeni
ng re
sults
fro
m P
hase
s 1
and
2
-Pha
se 3
als
o ad
dres
ses
findi
ngs
that
can
not b
e ev
alua
ted
usin
g th
e P
hase
2 p
roce
ss (e
.g.,
exte
rnal
ev
ent c
ontri
buto
rs) )
-Pha
se 3
ana
lysi
s us
es a
ppro
pria
te P
RA
tech
niqu
es
and
rely
onth
eex
perti
seof
NR
Cris
kan
alys
ts
Aug
ust 2
7-31
, 201
2 R
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ED
RE
GU
LATI
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SE
MIN
AR
and
rely
on
the
expe
rtise
of N
RC
risk
ana
lyst
s
15
Phas
e3
SDP
Phas
e 3
SDP
Phas
e 3
anal
ysis
pac
kage
incl
udes
the
follo
win
g:P
h1
d2
l
Pha
se 1
and
2 re
sults
P
RA
tool
s us
ed fo
r the
Pha
se 3
ass
essm
ent
A
ffect
ed a
ccid
ent s
eque
nces
In
fluen
tiala
ssum
ptio
ns
Influ
entia
l ass
umpt
ions
S
ensi
tivity
of r
esul
ts to
eac
h as
sum
ptio
n
Con
tribu
tions
of g
reat
est u
ncer
tain
ty fa
ctor
s
Ris
k ef
fect
s of
Lar
ge E
arly
Rel
ease
Fre
quen
cy, i
nter
nal
flood
ing
and
exte
rnal
eve
nts
are
also
eva
luat
ed
Phas
e 3
anal
ysis
is d
ocum
ente
d in
a S
igni
fican
ce a
nd
Enfo
rcem
ent R
evie
w P
anel
(SER
P) p
acka
ge a
nd p
rese
nted
to
SER
P m
embe
rs fo
r a p
relim
inar
y de
cisi
on
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ust 2
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SER
PPr
oces
sSE
RP
Proc
ess
Prel
imin
ary
SER
P de
cisi
on p
rese
nted
to
yp
licen
see
in a
“C
hoic
e” le
tter
-Lic
ense
e ha
s ch
oice
to re
spon
d by
lette
r or
atte
nda
Reg
ulat
ory
Con
fere
nce
atte
nd a
Reg
ulat
ory
Con
fere
nce
-Lic
ense
e m
ay a
ccep
t pre
limin
ary
resu
lt
If pr
elim
inar
y re
sult
is c
hang
ed d
ue to
new
in
form
atio
n or
insi
ghts
, SER
P re
conv
enes
an
dde
term
ines
final
sign
ifica
nce
ofan
d de
term
ines
fina
l sig
nific
ance
of
findi
ng-f
inal
sig
nific
ance
lette
r sen
t to
licen
see
dib
ifi
did
lt
iifi
Aug
ust 2
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desc
ribin
g fin
ding
and
regu
lato
ry s
igni
fican
ce17
SDP
Cha
lleng
esSD
P C
halle
nges
Ti
mel
ines
s go
al o
f < 9
0 da
ys –
use
of b
est a
vaila
ble
gy
info
rmat
ion
for d
ecis
ion-
mak
ing
Le
velo
fris
kkn
owle
dge
need
edfo
rris
kin
form
ed
Leve
l of r
isk
know
ledg
e ne
eded
for r
isk-
info
rmed
in
spec
tors
E
nhan
cem
ent o
f Pha
se 3
SD
P ri
sk a
naly
sis
tool
s an
d gu
idan
ce –
Ris
k A
sses
smen
t Sta
ndar
diza
tion
Pro
ject
(R
AS
P)
()
Aug
ust 2
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ASS
ESSM
ENT
ASS
ESSM
ENT
P
erfo
rman
ce In
dica
tors
and
Insp
ectio
n Fi
ndin
gs A
re
pg
Com
bine
d fo
r an
Ove
rall
Ass
essm
ent o
f Pla
nt
Per
form
ance
.
A
ctio
n M
atrix
Is U
sed
to A
sses
s P
erfo
rman
ce a
nd
Det
erm
ine
Reg
ulat
ory
Act
ions
.
Q
uarte
rly, M
id-C
ycle
and
End
of C
ycle
Ass
essm
ents
A
re P
erfo
rmed
for E
ach
Lice
nsee
Aug
ust 2
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19
AC
TIO
NM
ATR
IXC
ON
CEP
TA
CTI
ON
MA
TRIX
CO
NC
EPT
Lice
nsee
Res
pons
eR
egul
ator
yR
espo
nse
Deg
rade
dC
orne
rsto
neM
ultip
le/R
ep.
Deg
rade
dC
orne
rsto
ne
Una
ccep
tabl
ePe
rfor
man
ce
Ii
Sf
tS
iifi
Incr
easi
ng S
afet
y S
igni
fican
ce
Incr
easi
ng N
RC
Insp
ectio
n E
fforts
Incr
easi
ng N
RC
/Lic
ense
e M
anag
emen
t Inv
olve
men
t
Aug
ust 2
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Incr
easi
ng R
egul
ator
y A
ctio
ns
RO
P R
efer
ence
sI
iM
lCh
Insp
ectio
n M
anua
l Cha
pter
s
IMC
305
, Ope
ratin
g R
eact
or A
sses
smen
t Pro
gram
IMC
307
, Rea
ctor
Ove
rsig
ht P
roce
ss S
elf-A
sses
smen
t Pro
gram
IMC
308
, RO
P B
asis
Doc
umen
t
IMC
350
, Ove
rsig
ht o
f Ope
ratin
g R
eact
or F
acili
ties
in a
Shu
tdow
n C
ondi
tion
with
Per
form
ance
Pro
blem
s
IMC
608
, Per
form
ance
Indi
cato
r Pro
gram
IMC
609
, Sig
nific
ance
Det
erm
inat
ion
Pro
cess
IMC
612
, Pow
er R
eact
or In
spec
tion
Rep
orts
IMC
124
5, Q
ualif
icat
ion
Pro
gram
for t
he O
ffice
of N
ucle
ar R
eact
or
Reg
ulat
ion
Pro
gram
s
IMC
251
5, L
ight
-Wat
er R
eact
or In
spec
tion
Pro
gram
--O
pera
tions
P
hase
Web
site
add
ress
-ht
tp://
ww
w.n
rc.g
ov/re
adin
g-rm
/doc
-co
llect
ions
/insp
man
ual/m
anua
lcha
pter
/inde
xht
ml
Aug
ust 2
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AR
21
colle
ctio
ns/in
sp-m
anua
l/man
ual-c
hapt
er/in
dex.
htm
l
U.S
. NR
C P
olic
yIn
cide
nt In
vest
igat
ions
E
nsur
e th
at s
igni
fican
t ope
ratio
nal e
vent
s ar
e in
vest
igat
ed
gp
gin
a ti
mel
y, o
bjec
tive,
sys
tem
atic
, and
tech
nica
lly s
ound
m
anne
r; fa
ctua
l inf
orm
atio
n is
doc
umen
ted
and
the
caus
e or
cau
ses
are
dete
rmin
ed
Aug
ust 2
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Siifi
Oi
lESi
gnifi
cant
Ope
ratio
nal E
vent
A
ny ra
diol
ogic
al, s
afeg
uard
s, o
r oth
er s
afet
y-re
late
d op
erat
iona
l eve
nt th
at p
oses
an
actu
al o
r a p
oten
tial
haza
rd to
pub
lic h
ealth
and
saf
ety,
pro
perty
, or t
he
envi
ronm
ent
E
xam
ples
incl
ude:
D
ecla
ratio
n of
a s
ite a
rea
emer
genc
yg
y
Exc
eede
d a
Saf
ety
Lim
it
Led
to a
sig
nific
ant (
i.e.,
5 tim
es re
gula
tory
lim
it)
radi
olog
ical
expo
sure
radi
olog
ical
exp
osur
e
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ust 2
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Even
t/Con
ditio
n R
espo
nse
NR
C P
rogr
ams
E
vent
Res
pons
e/Fo
llow
up –
Man
agem
ent D
irect
ive
8.3
S
igni
fican
ce D
eter
min
atio
n P
roce
ss in
the
Rea
ctor
Ove
rsig
ht
gg
Pro
cess
A
ccid
ent S
eque
nce
Pre
curs
or (A
SP
) Pro
gram
q(
)g
O
pera
ting
Exp
erie
nce
Pro
gram
Aug
ust 2
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Even
t Res
pons
eM
anag
emen
t Dire
ctiv
e 8.
3
Q
uick
ly D
eter
min
e R
isk
Sig
nific
ance
of A
ctua
l Eve
nts
that
O
ccur
red
and
Pro
vide
a R
isk
Inpu
t for
App
ropr
iate
NR
C
Res
pons
eR
espo
nse
To
ols
Use
d
Sta
ndar
dize
d P
lant
Ana
lysi
s R
isk
(SP
AR
) Mod
els
Q
uant
itativ
e an
d Q
ualit
ativ
e R
isk
Insi
ghts
from
P
revi
ous
Stu
dies
(eg
Sta
tion
Bla
ckou
tA
TWS
etc
)P
revi
ous
Stu
dies
(e.g
., S
tatio
n B
lack
out,
ATW
S, e
tc.)
Li
cens
ee’s
(util
ity) P
lant
-Spe
cific
PR
A R
esul
ts, i
f A
vaila
ble
Aug
ust 2
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Even
t Res
pons
eM
anag
emen
t Dire
ctiv
e 8.
3 –
cont
.
Ris
k M
etric
s U
sed:
C
ondi
tiona
l Cor
e D
amag
e P
roba
bilit
y (C
CD
P fo
r ev
ents
, Inc
rem
enta
l CC
DP
(IC
CD
P) f
or c
ondi
tions
)
Con
ditio
nalL
arge
Ear
lyR
elea
seP
roba
bilit
y(C
LER
P
Con
ditio
nal L
arge
Ear
ly R
elea
se P
roba
bilit
y (C
LER
P
for e
vent
s, IC
LER
P fo
r con
ditio
ns),
if ne
cess
ary
R
isk
Ana
lyst
s fro
m N
RC
Hea
dqua
rters
and
the
Reg
iona
l O
ffice
Invo
lved
Coo
pera
tivel
y fo
r Con
sens
us (“
One
V
oice
” ) R
isk
Inpu
t)
p
Aug
ust 2
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Det
erm
inis
tic C
riter
ia fo
r Ev
ent/C
ondi
tion
Res
pons
e
Il
dl
tti
tht
dd
til
dd
i
Invo
lved
pla
nt o
pera
tions
that
exc
eede
d or
not
incl
uded
in
desi
gn b
ases
M
ajor
def
icie
ncy
in d
esig
n, c
onst
ruct
ion
or o
pera
tion
havi
ng
pote
ntia
l gen
eric
saf
ety
impl
icat
ions
S
igni
fican
t los
s of
fuel
inte
grity
, prim
ary
cool
ant p
ress
ure
boun
dary
, or p
rimar
y co
ntai
nmen
t bou
ndar
y
Lo
ss o
f saf
ety
func
tion
or m
ultip
le fa
ilure
s in
sys
tem
s to
m
itiga
te e
vent
Aug
ust 2
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Det
erm
inis
tic C
riter
ia fo
r Ev
ent/C
ondi
tion
Res
pons
e –
cont
.
Pib
ld
ii
liti
P
ossi
ble
adve
rse
gene
ric im
plic
atio
ns
S
igni
fican
t une
xpec
ted
syst
em in
tera
ctio
ns
R
epet
itive
failu
res/
even
ts in
volv
ing
safe
ty-r
elat
ed e
quip
men
t or
ope
ratio
ns d
efic
ienc
ies
p
C
once
rns
with
lice
nsee
ope
ratio
nal p
erfo
rman
ce
Aug
ust 2
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Gra
ded
Even
t Res
pons
e vs
.C
dii
lCb
bili
(CC
)C
ondi
tiona
l Cor
e D
amag
e Pr
obab
ility
(CC
DP)
1E-6
1E-5
1E-5
1E-4
1E
-41E
-3CC
DP>1
E3
CCDP
<1E-6
-1E
- 51E
-51E
-4
1E- 4
1E-3
-1E
1E1E
1E1E
1ECC
DP>1
ECC
DP<1
E1E
1E1E
1E1E
Noad
ditio
nal
No a
dditi
onal
re
activ
e in
spec
tion
Si
lIti
Spec
ial I
nspe
ctio
n
Augm
ente
d In
spec
tion
Team
Inci
dent
Inve
stig
atio
nTe
am
Aug
ust 2
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Inci
dent
Inve
stig
atio
n Te
am
Exam
ple:
Pla
nt X
Aut
omat
ic R
eact
or T
rip
S
umm
ary
A
rout
ine
test
of t
he a
ltern
ate
pow
er s
ourc
e fo
r the
Con
trol R
od D
rive
(CR
D)
Sys
tem
was
in p
rogr
ess
whe
n po
wer
to th
e C
RD
sys
tem
was
inte
rrup
ted
R
eact
or tr
ip a
nd A
C p
ower
tran
sfer
red
to th
e S
tart-
up s
ourc
e (s
witc
hyar
d)
Th
e M
ain
Ste
am H
eade
r pre
ssur
e co
ntro
l set
poin
t did
not
aut
omat
ical
ly in
crea
se
for p
ost-t
rip R
CS
tem
pera
ture
con
trol
ThR
CS
ld
dt
it
l53
6F(
ltt
i
The
RC
S c
oole
d do
wn
to a
ppro
xim
atel
y 53
6F (v
ersu
s a
norm
al p
ost-t
rip
tem
pera
ture
of a
ppro
xim
atel
y 55
5F),
redu
cing
RC
S p
ress
ure
to th
e ac
tuat
ion
setp
oint
for E
ngin
eere
d S
afeg
uard
s C
hann
els
1 an
d 2.
Thi
s st
arte
d th
e H
igh
Pre
ssur
e In
ject
ion
pum
ps in
EC
CS
mod
e, c
ause
d pa
rtial
con
tain
men
t iso
latio
n an
d in
itiat
ed s
tart-
up o
f bot
h P
lant
X H
ydro
Uni
ts (e
mer
genc
y po
wer
)
P
ress
uriz
er le
vel d
ecre
ased
off-
scal
e lo
w a
nd w
as re
cove
red
prio
r to
secu
ring
the
Hig
h P
ress
ure
Inje
ctio
n pu
mps
Aug
ust 2
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Exam
ple:
Pla
nt X
Aut
omat
ic R
eact
or T
rip(C
ontin
ued)
(Con
tinue
d)
Emer
genc
y R
espo
nse
(MD
82)
MD
8.3
-CC
DP
estim
ated
to b
e 3E
-5S
ilI
ti
ASP
-Rev
iew
of l
icen
see
repo
rt an
d in
spec
tion
findi
ng fo
r pr
ecur
sors
Res
pons
e (M
D 8
.2)
-Pla
nt’s
resp
onse
su
cces
sful
-No
need
for N
RC
in
cide
nt re
spon
se
tiR
tT
i
-Spe
cial
Insp
ectio
n
~ 90
day
s~
10da
ystim
eR
eact
or T
rip
INES
Rat
ing
-Lev
el 0
SDP
-To
dete
rmin
e th
e ris
k si
gnifi
canc
e of
the
licen
see
perfo
rman
ce d
efic
ienc
y, if
any
10
days
Ope
ratin
g Ex
perie
nce
-Iss
ue fo
r Res
olut
ion
-To
perfo
rm fo
llow
-up
for
sign
ifica
nce
and
gene
ric
Aug
ust 2
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, 201
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sign
ifica
nce
and
gene
ric
impl
icat
ions
, and
sub
sequ
ent
appl
icat
ions
USN
RC
Mai
nten
ance
Rul
e(M
R)
USN
RC
Mai
nten
ance
Rul
e (M
R)
10
CFR
50.
65 is
sued
Jul
y, 1
991
“Req
uire
men
ts fo
r y,
qM
onito
ring
the
Effe
ctiv
enes
s of
Mai
nten
ance
at
Nuc
lear
Pow
er P
lant
s”
MR
ffti
Jl
1996
M
R e
ffect
ive
July
199
6
Est
ablis
hes
expe
ctat
ions
for b
alan
cing
stru
ctur
es,
syst
ems,
&co
mpo
nent
s(S
SC
s)un
avai
labi
lity
with
syst
ems,
& c
ompo
nent
s (S
SC
s) u
nava
ilabi
lity
with
S
SC
s re
liabi
lity
(Rul
e se
ctio
ns a
(1-3
))
Est
ablis
hes
expe
ctat
ions
for a
sses
sing
con
figur
atio
n i
kt
hi
itf
risk
man
agem
ent w
hen
rem
ovin
g eq
uipm
ent f
rom
se
rvic
e (R
ule
sect
ion
a(4)
)
Aug
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Mai
nten
ance
Rul
eO
verv
iew
Mai
nten
ance
Rul
e O
verv
iew
U
tiliti
es im
plem
ente
d M
R s
ectio
ns a
(1 th
roug
h 4)
via
p
(g
)gu
idan
ce d
ocum
ents
:-
NU
MA
RC
93-
01-
NR
C R
egul
ator
y G
uide
1.1
60
PR
A n
ot s
peci
fical
ly re
quire
d by
MR
; how
ever
, ut
ilitie
sge
nera
llyus
edP
RA
with
dete
rmin
istic
crite
riaut
ilitie
s ge
nera
lly u
sed
PR
A w
ith d
eter
min
istic
crit
eria
to
sco
pe S
SC
s in
to th
e M
R p
rogr
am a
nd e
stab
lish
perfo
rman
ce c
riter
ia
M
R a
(4) r
egul
ator
y re
quire
men
t effe
ctiv
e as
of
Nov
embe
r 28,
200
0
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ust 2
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Mai
nten
ance
Rul
ea(
4)M
aint
enan
ce R
ule
a(4)
Li
cens
ees
‘requ
ired’
to p
erfo
rm M
R a
(4) r
isk
qp
()
asse
ssm
ents
R
isk
thre
shol
dsan
dco
nseq
uent
iala
ctio
ns
Ris
k th
resh
olds
and
con
sequ
entia
l act
ions
es
tabl
ishe
d by
Sec
tion
11 o
f NU
MA
RC
93-
01,
Rev
isio
n 3
(als
o re
fer t
o N
RC
Reg
ulat
ory
Gui
de
118
2)1.
182)
C
urre
nt c
halle
nges
are
trea
tmen
t of e
xter
nal e
vent
g
initi
ator
s fo
r con
figur
atio
n ris
k m
anag
emen
t mod
els
(whi
ch a
re b
ased
on
licen
see
PR
As)
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ust 2
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Mai
nten
ance
Rul
e a(
4)
Ri
kh
hld
fi
fi
Ris
k th
resh
olds
for e
quip
men
t out
of s
ervi
ce
ICD
PIL
ER
P
> 10
¯5-P
lant
con
figur
atio
n sh
ould
not
no
rmal
lybe
ente
red
volu
ntar
ily>
10¯6
norm
ally
be
ente
red
volu
ntar
ily
10¯6
-10
¯5-
Ass
ess
non-
quan
tifia
ble
fact
ors
10¯7
-10
¯6
-E
stab
lish
risk
man
agem
ent a
ctio
ns
<10
¯6N
orm
alw
ork
cont
rols
<10
¯7<
106
-N
orm
al w
ork
cont
rols
< 10
7
35
Aug
ust 2
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Wha
tisM
SPI?
Wha
t is M
SPI ?
A m
easu
re o
f the
dev
iatio
n of
pla
nt
til
bilit
dt
syst
em u
nava
ilabi
lity
and
com
pone
nt
unre
liabi
litie
s fro
m b
asel
ine
valu
es,
wei
ghte
d by
pla
nt-s
peci
fic ri
sk
impo
rtanc
e m
easu
res.
pota
ceea
sues
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ust 2
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36
Rea
son
for
Cha
nge
Rea
son
for
Cha
nge
Pbl
ithtS
ft
St
P
robl
ems
with
cur
rent
Saf
ety
Sys
tem
U
nava
ilabi
lity
Per
form
ance
Indi
cato
r
B
alan
ces
need
for m
aint
enan
ce (a
vaila
bilit
y)
with
equ
ipm
ent p
erfo
rman
ce (r
elia
bilit
y)q
pp
(y)
E
limin
ates
cas
cadi
ng c
oolin
g w
ater
sys
tem
g
gy
prob
lem
s
Aug
ust 2
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37
Mor
e m
aint
enan
ce in
crea
ses
Una
vaila
bilit
y…
60
40
50
ity
30
availabili
10
20
Una
00
10
20
30
40
50
Aug
ust 2
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Ma
inte
na
nc
e
38
...bu
t it d
ecre
ases
Unr
elia
bilit
y…
7080 506070
ty
304050
nreliabilit
102030
Un
010
010
2030
4050
Aug
ust 2
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Ma
inte
na
nc
e
39
...an
d th
ere
is a
n op
timum
!
7080
ty
5060
nreliabilit
304050
bility + Un
102030
Unavailab
010
010
2030
4050
U
Aug
ust 2
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inte
na
nc
e
40
Attr
ibut
es o
f MS
PI
•R
isk-
info
rmed
, per
form
ance
-bas
ed.
•A
llow
s tra
de-o
ffs b
etw
een
unre
liabi
lity
and
unav
aila
bilit
yto
optim
ize
syst
empe
rform
ance
.un
avai
labi
lity
to o
ptim
ize
syst
em p
erfo
rman
ce.
•N
o pe
nalty
for o
n-lin
e pr
even
tive
mai
nten
ance
ho
urs
upto
pre
plan
ned
base
line
hour
s up
to p
re-p
lann
ed b
asel
ine.
•R
efle
cts
plan
t-spe
cific
des
ign
and
oper
atio
n.
•A
ddre
sses
issu
es s
uch
as tr
eatm
ent o
f fau
lt ex
posu
re ti
me
in S
afet
y S
yste
m U
nava
ilabi
lity
Aug
ust 2
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py
yy
Per
form
ance
Indi
cato
r.41
Mon
itore
dSy
stem
sM
onito
red
Syst
ems
BW
Rs
PW
Rs
Hig
h P
ress
ure
Coo
lant
In
ject
ion/
Cor
e S
pray
H
igh
Pre
ssur
e S
afet
y In
ject
ion
RC
IC o
r Iso
latio
n C
onde
nser
A
uxilia
ry o
r Em
erge
ncy
Feed
wat
erR
esid
ualH
eatR
emov
alR
esid
ualH
eatR
emov
al(m
ayR
esid
ual H
eat R
emov
alR
esid
ual H
eat R
emov
al (m
ay
incl
ude
cont
ainm
ent s
pray
)E
mer
genc
y A
C p
ower
Em
erge
ncy
AC
pow
ere
gecy
Cpo
ee
gecy
Cpo
e
Coo
ling
Wat
er S
uppo
rt S
tC
oolin
g W
ater
Sup
port
St
Aug
ust 2
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42
Sys
tem
s S
yste
ms
The
End
Que
stio
ns&
Ans
wer
sQ
uest
ions
& A
nsw
ers…
..
RIS
KR
ISK
--INFO
RM
ED
RE
GU
LATI
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AR
INFO
RM
ED
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GU
LATI
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AR
Mex
ico
City
, Mex
ico
Mex
ico
City
, Mex
ico
Aug
ust 2
7A
ugus
t 27--
31, 2
012
31, 2
012
43
