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Palo
Verd
e U
nit
3
Palo
Verd
e U
nit
3
Bo
tto
mB
ott
om
--Mo
un
ted
Inst
rum
en
t(B
MI)
Mo
un
ted
Inst
rum
en
t(B
MI)
Bo
tto
mB
ott
om
--Mo
un
ted
In
stru
men
t (B
MI)
M
ou
nte
d I
nst
rum
en
t (B
MI)
N
ozz
le #
3 L
eak
No
zzle
#3
Leak
Nov
ember
4,
2013
Nov
ember
4,
2013
Palo
Verd
e P
art
icip
an
ts/
Att
en
dees
Dw
ight
Mim
sSen
ior
Vic
ePr
esid
ent
Reg
ula
tory
&O
vers
ight
Dw
ight
Mim
sSen
ior
Vic
e Pr
esid
ent,
Reg
ula
tory
& O
vers
ight
Jack
Cad
ogan
*Vic
e Pr
esid
ent,
Nucl
ear
Engin
eeri
ng
Ron B
arnes
*D
irec
tor, N
ucl
ear
Reg
ula
tory
Affai
rs
Ken
House
*D
irec
tor,
Des
ign
Engin
eering
Ken
House
Direc
tor, D
esig
n E
ngin
eering
Mik
e M
cLau
ghlin
Direc
tor, T
echnic
al S
upport
Mar
k Fa
llon
Direc
tor
(act
ing),
Pal
oVer
de
Com
munic
atio
ns
Tom
Web
er*
Dep
artm
ent
Lead
er,
Nucl
ear
Reg
ula
tory
Affai
rs
Mik
e D
iLore
nzo
Dep
artm
ent
Lead
er,
Progra
m E
ngin
eering
Brian
Cab
leM
anag
er,
Unit 3
Oper
atio
ns
Doug H
anse
n*
Sen
ior
Consu
ltin
g E
ngin
eer,
Pro
gra
m E
ngin
eeri
ng /
Princi
pal
Lev
el I
II
Ed F
ernan
dez
*Sen
ior
Met
allu
rgis
t, E
ngin
eeri
ng P
rogra
ms
/ PW
RO
G M
SC C
hai
rman
Gen
e M
ontg
om
ery
Sen
ior
Engin
eer, D
esig
n E
ngin
eering (
Mec
han
ical
NSSS)
Sco
tt B
auer
Reg
ula
tory
Affai
rs M
anag
er,
STA
RS
kld
dD
ave
Was
key
Man
ager
, W
eldin
g a
nd C
om
ponen
t Rep
air
Des
ign,
Are
va
Doug K
illia
nTe
chnic
al C
onsu
ltan
t, A
reva
Mic
hae
l La
shle
yAss
oci
ate,
Str
uct
ura
l In
tegrity
Ass
oci
ates
, In
c.
NO
TE:
* iden
tifies
pre
sente
rs2
Ag
en
da
•D
isco
very
and I
nitia
l Res
ponse
Ron B
arnes
•N
DE A
ctio
n P
lan a
nd R
esults
Doug H
anse
n
•Cau
salEva
luat
ion
Ed
Fern
andez
Cau
sal Eva
luat
ion
Ed F
ernan
dez
•Rep
air
Plan
Ken
House
•Rel
ief
Req
ues
tTo
m W
eber
•Clo
sing C
om
men
tsJa
ck C
adogan
gg
3
Desi
red
Meeti
ng
Ou
tco
mes
•Aw
aren
ess/
under
stan
din
g o
f:Conditio
nan
dcu
rren
tst
atus
–Conditio
n a
nd c
urr
ent
stat
us
–N
on-d
estr
uct
ive
exam
inat
ion (
ND
E)
met
hodolo
gy
and r
esults
gy
–Cau
sal ev
aluat
ion m
ethodolo
gy,
res
ults
to d
ate
–Rep
air
pla
n/t
echniq
ue
–Rel
ief
Req
ues
t
•APS
/Pal
o V
erde
under
stan
ds
NRC
/l
dh
ques
tions/
conce
rns
rela
ted t
o t
his
iss
ue
4
Dis
covery
an
d I
nit
ial
Dis
covery
an
d I
nit
ial
Resp
on
seR
esp
on
se
Ron B
arnes
Di
Nl
Rl
Aff
iD
irec
tor, N
ucl
ear
Reg
ula
tory
Affai
rs
Un
it 3
React
or
BM
IN
l#
3
Con
trol
Ele
men
t D
rive
Mec
hani
sm
BM
I N
ozz
le #
3
20
10
20
10
20
13
20
13
In-c
ore
Inst
rum
enta
tion
Noz
zles
Noz
zles
6
BM
I N
ozz
les
•Fi
xed in-c
ore
inst
rum
enta
tion
61
tti
•61 p
enet
rations
•3.0
” outs
ide
dia
met
er0
”i
iddi
J-gro
ove
wel
d
•0.7
5”
insi
de
dia
met
er•
J-gro
ove
wel
d•
Allo
y 600 n
ozz
le m
ater
ial
Rea
ctor
Ves
sel
7
Init
ial
Resp
on
se
•Eve
nt
Notifica
tion (
EN
S)
to N
RC
•Res
ponse
Team
ses
tablis
hed
–tier
edRes
ponse
Tea
ms
esta
blis
hed
tier
ed
appro
ach
–N
on-d
estr
uct
ive
Exa
min
atio
n (
ND
E)
Team
to
char
acte
rize
flaw
char
acte
rize
fla
w–
Engin
eering/R
epai
r Te
am
–Pr
oje
ct M
anag
emen
t Te
am–
Cau
sal Eva
luat
ion T
eam
•Com
munic
atio
n P
lan im
ple
men
ted
Incl
uded
NRC
and
indust
ryst
akeh
old
ers
–In
cluded
NRC a
nd indust
ry s
take
hold
ers
•Le
vera
ged
indust
ry e
xper
tise
/exp
erie
nce
in a
ll as
pec
ts o
f re
sponse
8
Deci
sio
n
Tre
e
BMI L
eak I
dent
ified
BMI L
eak I
dent
ified
BMI L
eak I
dent
ified
BMI L
eak I
dent
ified
Info
rm N
RC/ In
dust
ryI
fti
lTre
eCh
arac
teriz
e flaw
UT
/ECT
in tu
be
Info
rmat
iona
l he
lium
test
Weld
indi
catio
n of
bubb
le (c
onfir
med
)11
Axial
flaw
in tu
be
OROR
AA
AND
AND
Dete
rmin
e Pe
rform
Circ
umfe
rent
ial fla
w in
tube
Cons
ult in
dust
ry11
11
Repa
ir an
d re
mna
nt
analy
sis
10%
expa
nsio
n
No fl
aw d
etec
ted
in tu
be
boat
sa
mpl
e lo
catio
n
J-we
ld
ECT
Perfo
rm
enha
nced
vis
ual (V
E)
Rem
ove b
oat
sam
ple
Conf
irmed
Not C
onfir
med
OROR
4444
220%
epa
so
Flaw
analy
sis of
ex
pans
ion
AND
AND
J-we
ld E
CTEn
hanc
ed V
isual
Go to
axial
Expa
nd 10
0%
Flaw
analy
sis
of ex
pans
ion
AA
22
OROR
Acce
pt as
isRe
pair
as n
eede
d
Repa
ir
OROR
Acce
ptas
isRe
pair
asne
eded
NO
TE
S1.
For
char
acte
rize
d fla
ws,
J-w
eld a
nd a
Boat
Sam
ple
will
be
consi
der
ed.
2.
If t
he
EPR
I dem
onst
rations
iden
tify
sig
nific
ant
limitat
ions,
th
en e
xpan
sion b
eyond 1
0 C
FR 5
0.5
5a
will
be
re-e
valu
ated
.
3.
Flaw
eva
luat
ion a
nd e
xpan
sion a
re a
pplic
able
to p
ress
ure
boundar
y ar
eas
only
.
4A
dfi
db
iti
d
11 22 33 44Ac
cept
as is
Repa
ir as
nee
ded
4.
As
def
ined
by
insp
ection p
roce
dure
.44
9
No
nN
on
--Dest
ruct
ive
Dest
ruct
ive
Exam
inati
on
(ND
E)
Exam
inati
on
(ND
E)
Exam
inati
on
(N
DE)
Exam
inati
on
(N
DE)
Act
ion
Pla
n a
nd
Resu
lts
Act
ion
Pla
n a
nd
Resu
lts
Doug H
anse
nS
iC
li
Ei
PE
ii
Sen
ior
Consu
ltin
g E
ngin
eer, P
rogra
m E
ngin
eering
Prin
cipal
Leve
l II
I
Bare
Meta
l V
isu
al
Exam
inati
on
(V
E)
•Exa
min
atio
ns
per
form
ed p
er C
ode
Cas
e N
722-1
All
61
li
d•
All
61 n
ozz
les
exam
ined
•N
ozz
le #
3 w
as t
he
only
one
with lea
kage
note
d
11
Wast
ag
e E
xam
inati
on
N
ozz
le#
3Res
ults
Nozz
le #
3 R
esults
•Ph
ased
Arr
ay U
ltra
sonic
Tes
ting
Cd
td
fth
tid
–Conduct
ed f
rom
the
outs
ide
–Adja
cent
to n
ozz
le #
3–
Focu
son
deg
radat
ion
(was
tage)
inth
eve
ssel
Focu
s on d
egra
dat
ion (
was
tage)
in t
he
vess
el
shel
l at
the
nozz
le b
ore
•Exa
min
atio
n d
emonst
ration:
–South
Tex
as P
roje
ct (
STP)
mock
-up a
nd
tech
niq
ue
–All
mock
-up f
law
s w
ere
det
ecte
dp
•Exa
min
atio
n r
esults:
–N
o indic
atio
n o
f w
asta
ge
was
det
ecte
d
12
Heli
um
Bu
bb
le T
est
13
Vid
eo
Here
Vid
eo
Here
14
J-G
roo
ve W
eld
Ed
dy
Ct
Tti
Cu
rren
t Test
ing
•O
nth
edec
isio
ntr
ee•
On t
he
dec
isio
n t
ree
•Te
chnolo
gy
not
avai
lable
to
pla
ceco
ilat
the
to p
lace
coil
at t
he
hel
ium
are
a
15
Ult
raso
nic
& E
dd
y C
urr
en
t Test
ing
•Sim
ilar
to r
eact
or
vess
el c
losu
re h
ead
exam
inat
ions
exam
inat
ions
•Conduct
ed fro
m t
he
nozz
le insi
de
dia
met
er•
Sin
gle
pro
be
with m
ultip
le t
echniq
ues
gp
pq
•Te
chniq
ues
dem
onst
rate
d a
t EPR
I:–
TOFD
(tim
e of
flig
ht
diffr
action)
•Both
axi
al a
nd c
ircu
mfe
rential
–Additio
nal
tec
hniq
ues
use
d:
•In
side
dia
met
ered
dy
curr
ent
Insi
de
dia
met
er e
ddy
curr
ent
•45 d
egre
e sh
ear-
wav
e U
T;
looki
ng d
ow
n•
Zer
o d
egre
e U
T;
looki
ng p
erpen
dic
ula
r to
the
surf
ace
16
Ult
raso
nic
Test
ing
Dem
on
stra
tio
n(E
PRI
ND
ECen
ter)
(EPR
I N
DE C
ente
r)
•M
ock
-up d
esig
n a
nd
fb
iti
l2013
fabrica
tion e
arly
2013
─Fl
aw loca
tions:
insi
de
and
outs
ide
dia
met
eran
d o
uts
ide
dia
met
er─
Flaw
orien
tations:
axi
al,
off
angle
, an
d
circ
um
fere
ntial
•Res
ults:
all
flaw
s d
tt
ddet
ecte
d
17
No
zzle
#3
TO
FD
Gra
ph
ic3
60
3
60
Deg
ree s
lice
Deg
ree s
lice
36
0
36
0 D
eg
ree s
lice
Deg
ree s
lice
Deep
est
0.3
78
” D
eep
est
0.3
78
” D
eep
est
0.3
78
” D
eep
est
0.3
78
”
Zo
om
ed
in
to
sh
ow
~
0.4
” o
f n
ozz
le o
f 1
.12
5”
tota
l th
ickn
ess
Zo
om
ed
in
to
sh
ow
~
0.4
” o
f n
ozz
le o
f 1
.12
5”
tota
l th
ickn
ess
Axia
l In
dic
ati
on
sA
xia
l In
dic
ati
on
sN
ozz
le O
D
No
zzle
OD
N
ozz
le O
D
No
zzle
OD
Weld
W
eld
A
rea
Are
aW
eld
W
eld
A
rea
Are
a
18
BM
I N
ozz
le #
3
Bu
bb
les
vis
ually o
bse
rved
at
42
deg
rees
12
3
4
Deep
est
:0
.37
8”
eep
est
03
8Lo
ng
est
: 1
.88
”O
vera
llw
idth
: 7
2º
(1.8
7”)
19
Co
ncl
usi
on
s/S
um
mary
•BM
I nozz
le #
3O
nly
visu
alle
akin
gnozz
le–
Only
vis
ual
lea
king n
ozz
le–
Hel
ium
val
idat
ed lea
k lo
cation
–N
oin
side
dia
met
erin
dic
atio
ns
det
ecte
dN
o insi
de
dia
met
er indic
atio
ns
det
ecte
d–
Multip
le a
xial
ultra
sonic
indic
atio
ns
•APS
Princi
pal
Lev
el I
II•
Two W
esD
yne
Leve
l II
Is•
Wes
Dyn
eChie
f Engin
eer
•EPR
Iin
dep
enden
tre
view
erEPRI
indep
enden
t re
view
er
•All
oth
er n
ozz
les
(60)
–N
o u
nac
cepta
ble
indic
atio
ns
p
20
Cau
salEvalu
ati
on
Cau
salEvalu
ati
on
Cau
sal Evalu
ati
on
Cau
sal Evalu
ati
on
Ed F
ernan
dez
Si
Mll
iE
ii
PSen
ior
Met
allu
rgis
t, E
ngin
eering P
rogra
ms
PWRO
G M
SC C
hai
rman
Cau
sal
Evalu
ati
on
Tea
mCom
posi
tion
Tea
m C
om
posi
tion
•Sta
tion
core
team
Sta
tion c
ore
tea
m–
Consi
stin
g o
f st
atio
n p
erso
nnel
and indust
ry
pee
rs incl
udin
g S
truct
ura
l In
tegrity
, W
estinghouse
and A
REVA
•In
dust
ry g
roups
PWRO
GM
ti
lS
bitt
(MSC)
–PW
RO
G M
ater
ials
Subco
mm
itte
e (M
SC)
–EPR
I M
ater
ial Rel
iabili
ty P
rogra
m (
MRP)
INPO
–IN
PO
22
Cau
sal
Evalu
ati
on
Proce
ssPr
oce
ss
•Fa
ilure
modes
and
effe
cts
anal
ysis
(FM
EA)
Failu
re m
odes
and e
ffec
ts a
nal
ysis
(FM
EA)
–Pa
lo V
erde
Corr
ective
Act
ion P
rogra
m (
CAP)
Cau
se A
nal
ysis
Man
ual
–Rev
iew
ed a
nd info
rmed
by
EPR
I M
RP-
206
“Insp
ection a
nd E
valu
atio
n G
uid
elin
es f
or
Rea
ctor
Ves
selBott
om
-Mounte
dN
ozz
les”
along
Rea
ctor
Ves
sel Bott
om
Mounte
d N
ozz
les
alo
ng
with O
per
atin
g E
xper
ience
les
sons
lear
ned
–D
evel
oped
a s
um
mar
y of
pote
ntial
cau
sal
fact
ors
bas
ed o
n input
from
EPR
I,
Wes
tinghouse
, AREVA,
STP
and S
truct
ura
l In
tegrity
Ass
oci
ates
Inte
grity
Ass
oci
ates
23
Cau
sal
Evalu
ati
on
─FM
EA
Noz
zle
Leak
Axi
al-R
adia
l W
eld
or B
utte
r Fl
aw
Circ
-Axi
al W
eld
or B
utte
r Fla
w
RPV
Surf
ace
Brea
king
Lac
k of
Fus
ion
ID/O
D A
xial
Fl
ow in
Tub
eID
/OD
Cir
cFl
aw in
Tub
e
Off
Wat
er
Chem
istr
y C
diti
iP
t
Nat
ural
Cir
cula
tion
Insi
de th
e N
ozzl
e T
b
Prim
ary
Wat
er
Envi
ronm
ent
Envi
ronm
enta
l Fa
tigue
Prim
ary
Wat
er
Envi
ronm
ent
Volu
met
ric
Def
ects
in N
ozzl
e Tu
befr
omM
at’l
Surf
ace
Def
ects
in
Noz
zle
Tube
from
Pr
oces
sing
Allo
y 60
0 H
eat
Trea
tmen
t
Tube
Mat
eria
l Re
pair
sW
eld
Repa
irs
Star
tup
Wat
er
Chem
istr
y T-
hot
Func
tiona
l
Ope
ratin
g Co
nditi
ons
Cond
ition
s in
Pas
tTu
be
Wel
d ho
t Cra
ckin
g an
d O
ther
Wel
d Fa
bric
atio
n f
/
Surf
ace
Cont
amin
ants
Lack
of W
eld
Fusi
on A
reas
from
b
Tube
from
Mat
lPr
oces
sing
Proc
essi
ng
Fabr
icat
ion
Trea
tmen
t
Gri
ndin
g of
N
ozzl
e Tu
be o
r ld
Noz
zle
Roll
Stra
ight
enin
g D
urin
gM
at’l
Noz
zle
Stra
ight
enin
g A
fter
Cold
Wor
king
p
Ri
It
iO
pera
tiona
l Im
pact
s
Prev
ious
Che
mis
try
Excu
rsio
ns/
Cont
amin
atio
n
Mec
hani
cal
Vibr
atio
n
Mat
eria
lSt
ress
Envi
ronm
ent
Def
ects
/ Co
ntam
inan
ts
Cont
amin
ants
Fabr
icat
ion
Wel
dD
urin
g M
atl
Proc
essi
ngA
fter
In
stal
latio
nRe
sin
Intr
usio
nsp
pof
Rx
Wor
k
24
Pro
bab
le C
au
se
•Pr
obab
le c
ause
–Cra
ck initia
tion w
aslik
ely
due
to a
wel
d d
efec
t ex
pose
d
toprim
ary
wat
eren
viro
nm
ent
resu
ltin
gin
prim
ary
to p
rim
ary
wat
er e
nvi
ronm
ent,
res
ultin
g in p
rim
ary
wat
er s
tres
s co
rrosi
on c
rack
ing (
PWSCC)
•Pr
obab
leca
usa
lfa
ctors
Probab
le c
ausa
l fa
ctors
–M
ater
ial
•Allo
y 600
•N
ear
surf
ace
wel
d d
efec
t–
Str
ess
•W
eld r
esid
ual
str
ess
•W
eld r
epai
rs a
nd g
rindin
g–
Envi
ronm
ent
–Envi
ronm
ent
•Pr
imar
y w
ater
•Te
mper
ature
•O
per
atin
g e
nvi
ronm
ent
25
Cau
sal
Evalu
ati
on
Additio
nal
Anal
yses
Additio
nal
Anal
yses
•Colle
ctio
nof
boat
sam
ple
Colle
ctio
n o
f boat
sam
ple
•Sam
ple
conte
nt
–RCS
leak
entr
ance
poin
tRCS lea
k en
tran
ce p
oin
t–
Wel
d d
efec
t–
Axi
al c
rack
–
Are
a of
hig
h r
efle
ctiv
ity
–U
naf
fect
ed A
lloy
600 a
nd 1
82
ti
lm
ater
ial
26
BM
I N
ozz
le #
3
Bu
bb
les
vis
ually o
bse
rved
at
42
deg
rees
12
3
4
Deep
est
:0
.37
8”
eep
est
03
8Lo
ng
est
: 1
.88
”O
vera
llw
idth
: 7
2º
(1.8
7”)
27
Bo
at
Sam
ple
Dim
en
sio
ns
28
Cau
sal
Evalu
ati
on
Boat
Sam
ple
Boat
Sam
ple
•M
etal
lurg
ical
anal
ysis
and
test
pla
nM
etal
lurg
ical
anal
ysis
and t
est
pla
n–
Vis
ual
insp
ections
–Li
quid
pen
etra
nt
(PT)
–X-r
ay r
adio
gra
phy
–H
igh-r
esolu
tion r
eplic
atio
n–
Sca
nnin
g E
lect
ron M
icro
scopy
(SEM
)–
Ener
gy
Dis
per
sive
Spec
trosc
opy
(ED
S)
Mt
llh
–M
etal
logra
phy
29
Co
ncl
usi
on
s/S
um
mary
•The
UT r
esults
are
char
acte
rist
ic o
f
PWSCC
PWSCC
•The
initia
tion lik
ely
occ
urr
ed a
t a
wel
d
def
ect
whic
hw
asex
pose
dto
the
prim
ary
def
ect
whic
h w
as e
xpose
d t
o t
he
prim
ary
wat
er e
nvi
ronm
ent
resu
ltin
g in P
WSCC
•Boat
sam
ple
rem
oval
and
met
allu
rgic
alBoat
sam
ple
rem
oval
and m
etal
lurg
ical
an
alys
is a
nd t
esting a
re p
lanned
30
Rep
air
Pla
nR
ep
air
Pla
nR
ep
air
Pla
nR
ep
air
Pla
n
Ken
House
Direc
tor
Des
ign
Engin
eering
Direc
tor, D
esig
n E
ngin
eering
Rep
air
Op
tio
ns
Co
nsi
dere
d
•H
alf-
nozz
le r
epai
r se
lect
edCode
com
plia
nt
repai
r–
Code
com
plia
nt
repai
r–
Prov
en t
echnolo
gy
—ex
tensi
ve indust
ry
exper
ience
p–
ALA
RA
–Pe
rman
ent
repai
r
•O
ther
options
consi
der
ed:
Et
lh
il
l–
Ext
ernal
mec
han
ical
plu
g–
Inner
dia
met
er t
emper
bea
d (
IDTB)
repai
r
32
Half
-No
zzle
Rep
air
Allo
y600
Allo
y 600
182 F
iller Te
mper
Bea
d P
ad52M
Fill
er
Allo
y 690
p
Tem
per
Bea
d P
ad
33
Exte
nsi
ve M
ock
-Up
Pre
para
tio
n
34
Bo
re M
ach
inin
g M
ock
-Up
35
Tem
per
Bead
Pad
Mo
ck-U
p
36
Weld
Pad
37
Rep
air
Tim
eli
ne
•Com
men
ced w
ork
: 10/2
7/2
013
TB
dP
dC
lt
11/0
2/2
013
•Te
mper
-Bea
d P
ad C
om
ple
te:
11/0
2/2
013
•H
alf-
Nozz
le C
om
ple
te:
11/0
7/2
013
38
Rep
air
An
aly
ses
Corr
osi
on
Ass
essm
ent
ASM
EASM
E
Anal
yses
39
AS
ME S
ect
ion
III
Cla
ss 1
An
aly
sis
•Str
ess
and f
atig
ue
anal
ysis
consi
sten
t w
ith
origin
alre
acto
rve
ssel
des
ign
spec
ific
atio
norigin
al r
eact
or
vess
el d
esig
n s
pec
ific
atio
n
requirem
ents
–Str
ess
load
s(n
orm
al/u
pse
t/em
ergen
cy/f
aulted
Str
ess
load
s (n
orm
al/u
pse
t/em
ergen
cy/f
aulted
co
nditio
ns)
–Fa
tigue
load
s (t
her
mal
tra
nsi
ent)
40
Co
rro
sio
n A
ssess
men
t
•Sm
all gap
bet
wee
n o
rigin
al A
lloy
600 n
ozz
le
and
new
Allo
y690
nozz
lew
illex
ist
follo
win
gan
d n
ew A
lloy
690 n
ozz
le w
ill e
xist
follo
win
g
repai
r•
Low
-allo
y st
eel co
rrosi
on r
ate
due
to inte
ract
ion
with p
rim
ary
coola
nt
in o
per
atin
g r
eact
ors
has
pro
ven t
o b
e ex
trem
ely
smal
l •
WCAP
15973
docu
men
tsm
ethod
for
eval
uat
ing
•W
CAP-
15973 d
ocu
men
ts m
ethod for
eval
uat
ing
corr
osi
on o
f lo
w a
lloy
stee
l fo
llow
ing h
alf-
nozz
le
repai
rs•
Palo
Ver
de
pla
nt-
spec
ific
anal
yses
are
in
pro
gre
ss,
whic
h f
ollo
w t
he
WCAP
met
hodolo
gy
41
Rem
nan
t A
naly
sis
Rem
nan
t Anal
ysis
42
Rem
nan
t A
naly
sis
for
Reli
ef
Req
uest
•Fi
nite
Ele
men
t Anal
ysis
pre
viousl
y done
for
a re
pre
senta
tive
Palo
Ver
de
BM
Inozz
lere
pre
senta
tive
Pal
o V
erde
BM
I nozz
le
configura
tion
–Pr
essu
re,
ther
mal
and r
esid
ual
str
esse
s
•AREVA p
erfo
rmed
a f
ract
ure
mec
han
ics
anal
ysis
on a
post
ula
ted m
axim
um
rem
nan
t fl
il
di
tifl
ti
fflaw
incl
udin
g c
onse
rvat
ive
flaw
ext
ensi
on for
crac
k gro
wth
during o
ne
oper
atin
g c
ycle
•Anal
ysis
dem
onst
rate
sth
ew
eld
flaw
•Anal
ysis
dem
onst
rate
s th
e w
eld fla
w
mai
nta
ins
stru
ctura
l in
tegrity
and is
acce
pta
ble
43
Su
mm
ary
/C
on
clu
sio
ns
•Pa
lo V
erde
imple
men
ting h
alf-
nozz
le r
epai
r on
Unit
3nozz
le#
3on U
nit 3
, nozz
le #
3─
Code
com
plia
nt
repai
r─
Perm
anen
tre
pai
rbac
ked
by
exte
nsi
vePe
rman
ent
repai
r bac
ked b
y ex
tensi
ve
indust
ry e
xper
ience
─Rep
air
bounds
pro
bab
le c
ause
(s)
•The
rem
nan
t an
alys
es s
upport
the
relie
f re
ques
t
44
Reli
ef
Req
uest
Reli
ef
Req
uest
Reli
ef
Req
uest
Reli
ef
Req
uest
Tom
Web
erD
epar
tmen
tLe
ader
Nucl
ear
Reg
ula
tory
Affai
rsD
epar
tmen
t Le
ader
, N
ucl
ear
Reg
ula
tory
Affai
rs
Palo
Verd
e A
pp
lica
ble
AS
ME C
od
es
•D
esig
n C
ode
for
reac
tor
vess
el
ASM
EII
I1971
Editio
nW
inte
r1973
Adden
da
–ASM
E I
II 1
971 E
ditio
n,
Win
ter
1973 A
dden
da
•Const
ruct
ion C
ode
ASM
EII
I1974
Editio
nW
inte
r1975
Adden
da
–ASM
E I
II 1
974 E
ditio
n,
Win
ter
1975 A
dden
da
•Rep
airs
/Rep
lace
men
ts–
ASM
EXI
2001
Editio
n2003
Adden
da
–ASM
E X
I 2001 E
ditio
n,
2003 A
dden
da
•Pa
lo V
erde
3rd
ISI
Inte
rval
–U
nit
1th
ru7-1
7-2
018
Unit 1
thru
717
2018
–U
nit 2
thru
3-1
7-2
017
–U
nit 3
thru
1-1
0-2
018
46
Reli
ef
fro
m A
SM
E C
od
e
•Tw
o s
epar
ate
relie
f re
ques
tsRes
tart
anal
ysis
–Res
tart
anal
ysis
•D
ura
tion o
f one
oper
atin
g c
ycle
–Lo
ng-t
erm
eva
luat
ion
og
tee
auat
o•
Det
aile
d a
nal
ysis
incl
udin
g f
atig
ue
crac
k gro
wth
•O
per
atio
n b
eyond n
ext
oper
atin
g c
ycle
47
Reli
ef
fro
m A
SM
E C
od
e
•Rem
oval
of
def
ects
IWA
4421
“Def
ects
shal
lbe
rem
oved
or
–IW
A 4
421,
“Def
ects
shal
l be
rem
oved
or
mitig
ated
in a
ccord
ance
…”
–IW
A 4
422.1
a, “
A d
efec
t is
consi
der
ed r
emov
ed
,w
hen
it
as b
een r
educe
d t
o a
n a
ccep
table
si
ze…
”IW
A4422
1b
“Alt
tl
thd
ft
l–
IWA 4
422.1
b,
“Alter
nat
ely,
the
def
ect
rem
oval
ar
ea a
nd a
ny
rem
ainin
g p
ort
ion o
f th
e def
ect
may
be
eval
uat
ed a
nd t
he
com
ponen
t ac
cepte
d
in a
ccord
ance
with t
he
appro
priat
e flaw
ev
aluat
ion p
rovi
sions
of
Sec
tion X
I…”
48
Reli
ef
fro
m A
SM
E C
od
e
•Char
acte
riza
tion o
f flaw
s in
J-g
roov
e w
eld
IWA
3100(a
)“E
valu
atio
nsh
allbe
mad
eofflaw
s–
IWA 3
100(a
),
Eva
luat
ion s
hal
l be
mad
e of flaw
s det
ecte
d d
uring a
n inse
rvic
eex
amin
atio
n a
s re
quired
by
IWB-3
000 f
or
Cla
ss 1
pre
ssure
re
tain
ing
com
ponen
ts”
reta
inin
g c
om
ponen
ts…
–IW
A 3
300(b
), “
Flaw
s sh
all be
char
acte
rize
d in
acco
rdan
ce w
ith I
WA-3
310 t
hro
ugh I
WA-3
390..
.”
–IW
A 3
420,
“Eac
h d
etec
ted fla
w o
r gro
up o
f flaw
s sh
all be
char
acte
rize
d b
y th
e ru
les
of
IWA-3
300 t
o
est a
blis
h t
he
dim
ensi
ons
of
the
flaw
s. T
hes
e ab
do
oa
dim
ensi
ons
shal
l be
use
d in c
onju
nct
ion w
ith t
he
acce
pta
nce
sta
ndar
ds
of
IWB-3
500.”
49
Reli
ef
fro
m A
SM
E C
od
e
•Succ
essi
ve e
xam
inat
ions
IWB
2420(b
)“I
fa
com
ponen
tis
acce
pte
dfo
r–
IWB 2
420(b
), “
If a
com
ponen
t is
acc
epte
d f
or
continued
ser
vice
in a
ccord
ance
with I
WB-
3132.3
or
IWB-3
142.4
, th
e ar
eas
conta
inin
g
flaw
s or
rele
vant
conditio
ns
shal
l be
reex
amin
ed d
uring t
he
nex
t th
ree
insp
ection
per
iods
liste
din
the
sched
ule
of
the
insp
ection
per
iods
liste
d in t
he
sched
ule
of
the
insp
ection
pro
gra
m o
f IW
B-2
400…
”
50
Pro
po
sed
Alt
ern
ati
ve p
er
10
CFR
50
55
a(a
)(3
)(i)
10
CFR
50
.55
a(a
)(3
)(i)
•Im
ple
men
t des
ign r
epai
r on o
uts
ide
surf
ace
of U
nit 3
rea
ctor
vess
el•
Rel
oca
te p
ress
ure
-ret
ainin
g w
eld
•Anal
yze
a post
ula
ted m
axim
um
fla
w in
rem
nan
t J-
gro
ove
wel
d•
Dura
tion o
f re
lief
to b
e one
oper
atin
g c
ycle
51
Basi
s fo
r R
elief
Req
uest
•ASM
E C
ode
com
plia
nt
hal
f-nozz
le r
epai
r N
th
lil
bl
f•
No t
echnolo
gy
avai
lable
for
char
acte
riza
tion o
f flaw
s in
J-g
roov
e w
eld
•Anal
ysis
of
post
ula
ted
max
imum
flaw
•Anal
ysis
of
post
ula
ted m
axim
um
fla
w
dem
onst
rate
s re
mnan
t flaw
rem
ains
acce
pta
ble
for
one
oper
atin
gcy
cle
acce
pta
ble
for
one
oper
atin
g c
ycle
52
Reli
ef
Req
uest
Su
mm
ary
•Pr
opose
d a
lter
nat
ive
pro
vides
an
acce
pta
ble
leve
lof
qual
ity
and
safe
tyfo
rac
cepta
ble
lev
el o
f qual
ity
and s
afet
y fo
r th
e nex
t oper
atin
g c
ycle
•Sep
arat
eASM
ERel
iefReq
ues
tto
addre
ssSep
arat
e ASM
E R
elie
f Req
ues
t to
addre
ss
succ
essi
ve A
SM
E C
ode
exam
inat
ions
and
oper
atio
n b
eyond t
he
nex
t oper
atin
g c
ycle
py
pg
y
53
Clo
sin
gC
om
men
tsC
losi
ng
Co
mm
en
tsC
losi
ng
Co
mm
en
tsC
losi
ng
Co
mm
en
ts
Jack
Cad
ogan
Vic
ePr
esid
ent
Nucl
ear
Engin
eering
Vic
e Pr
esid
ent,
Nucl
ear
Engin
eering
