Risk-Informed Regulation Seminar PRA Standards, Methods, & Regulatory Guidance … · 2012. 8....
31
SESSION 1 SESSION 1-7 PRA STANDARDS, METHODS, PRA STANDARDS, METHODS, & REGULATORY GUIDANCE & REGULATORY GUIDANCE & REGULATORY GUIDANCE & REGULATORY GUIDANCE Donnie Harrison U S Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission [email protected] 301.415.2470 RISK RISK-INFORMED REGULATION SEMINAR INFORMED REGULATION SEMINAR Mexico City, Mexico Mexico City, Mexico August 27 August 27-31, 2012 31, 2012
Transcript of Risk-Informed Regulation Seminar PRA Standards, Methods, & Regulatory Guidance … · 2012. 8....
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SESS
ION
1SE
SSIO
N 1
--77
PR
A S
TAN
DA
RD
S, M
ETH
OD
S,
PR
A S
TAN
DA
RD
S, M
ETH
OD
S,
&R
EGU
LATO
RY
GU
IDA
NC
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REG
ULA
TOR
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UID
AN
CE
& R
EGU
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IDA
NC
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REG
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AN
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Don
nie
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US
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lato
ryCo
mm
issi
onU
.S. N
ucle
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egul
ator
y Co
mm
issi
onD
onni
e.H
arris
on@
nrc.
gov
301.
415.
2470
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INAR
INFO
RM
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EGU
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INAR
Mex
ico
City
, Mex
ico
Mex
ico
City
, Mex
ico
Augu
st 2
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12
31, 20
12
-
Topi
csTo
pics
Topi
csTo
pics
PR
A St
anda
rds,
Met
hods
, an
d Reg
ulat
ory
Gui
danc
eg
y
Reg
ulat
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Gui
de 1
.200
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isio
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Impl
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31, 2
012
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-
PR
AQ
ual
ity
PR
AQ
ual
ity
Wh
atis
it?
Wh
atis
it?
PR
A Q
ual
ity
PR
A Q
ual
ity
––W
hat
is it
?W
hat
is it
?
In
Reg
ulat
ory
Gui
des
1.17
4 an
d 1.
200,
PRA
qual
ity is
de
scrib
ed in
ter
ms
of it
s:–
Scop
e (r
ange
of
risk
cont
ribut
ors
addr
esse
d)p
(g
)–
Tech
nica
l ade
quac
y–
Leve
l of
deta
il
Th
e PR
A m
ust
be o
f su
ffic
ient
qua
lity
to s
uppo
rt t
he
appl
icat
ion
W
hen
the
qual
ity is
con
side
red
adeq
uate
, the
lice
nsee
an
d re
gula
tor
can
have
con
fiden
ce in
the
res
ults
of
the
PRA
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3PR
A Q
ualit
y is
als
o re
ferr
ed t
o as
PRA
Tec
hnic
al A
ccep
tabi
lity
-
PR
ASt
anda
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vers
us
PR
AG
uid
ance
PR
ASt
anda
rds
vers
us
PR
AG
uid
ance
PR
A S
tan
dard
s ve
rsu
s P
RA
Gu
idan
ceP
RA
Sta
nda
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vers
us
PR
A G
uid
ance
PR
A St
anda
rd a
ddre
sses
the
tec
hnic
al a
dequ
acy
of t
he e
lem
ents
of
a P
RA
PR
A G
uida
nce
desc
ribes
how
to
deve
lop
or p
erfo
rm t
he e
lem
ents
of
aPR
Aof
a P
RA
–D
ata
Han
dboo
k–
HRA
Goo
d Pr
actic
esFi
PRA
Mth
d–
Fire
PRA
Met
hods
–U
ncer
tain
ty G
uida
nce
Reg
ulat
ory
Gui
danc
e pr
ovid
es N
RC
staf
f po
sitio
n on
acc
epta
ble
appr
oach
esfo
rap
plic
atio
nsap
proa
ches
for
app
licat
ions
–Reg
ulat
ory
Gui
de (
RG
) 1.
200
endo
rses
, with
exc
eptio
ns a
nd
clar
ifica
tions
, the
ASM
E/AN
S PR
A St
anda
rd a
nd a
ssoc
iate
d in
dust
rype
erre
view
guid
ance
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st 2
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indu
stry
pee
r re
view
gui
danc
e
-
PR
AQ
ual
ity
Expe
ctat
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sB
ackg
rou
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PR
AQ
ual
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Expe
ctat
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sB
ackg
rou
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PR
A Q
ual
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Expe
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s B
ackg
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PR
A Q
ual
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Expe
ctat
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s B
ackg
rou
nd
Dec
embe
r 2
00
3
Com
mis
sion
issu
ed S
RM
CO
MN
JD-0
3-00
02, PR
A Q
ualit
yEx
pect
atio
nsan
dRe
quire
men
tsQ
ualit
y Ex
pect
atio
ns a
nd R
equi
rem
ents
–Ap
prov
ed im
plem
enta
tion
of a
pha
sed
appr
oach
to
achi
evin
g an
ap
prop
riate
qua
lity
(i.e.
, tec
hnic
al a
dequ
acy)
for
PRAs
for
NRC
risk-
info
rmed
reg
ulat
ory
deci
sion
mak
ing
July
20
04
St
aff
issu
ed S
ECY-
04-0
118,
Pla
n fo
r th
e ,
Impl
emen
tatio
n of
the
Com
mis
sion
's P
hase
d Ap
proa
ch
to P
roba
bilis
tic R
isk
Asse
ssm
ent Q
ualit
y–
Bene
fits
from
dev
elop
men
t of
PRA
Stan
dard
s
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–Al
low
s co
ntin
ual p
ract
ical
use
of
risk
insi
ghts
whi
le p
rogr
essi
ng
tow
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mor
e co
mpl
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and
tech
nica
lly a
ccep
tabl
e PR
As
-
PR
ASt
anda
rdP
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Stan
dard
PR
A S
tan
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PR
A S
tan
dard
With
out
a PR
A St
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eter
min
atio
n of
Ac
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able
Qua
lity
for
an A
pplic
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n Ca
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-
PR
ASt
anda
rdP
RA
Stan
dard
PR
A S
tan
dard
PR
A S
tan
dard
With
a P
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Stan
dard
Det
erm
inat
ion
of
Acce
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le Q
ualit
y fo
r an
App
licat
ion
is
Clar
ified
and
Stab
lized
Clar
ified
and
Sta
bliz
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-
PR
A S
tan
dard
s/G
uid
ance
P
RA
Sta
nda
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Gu
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Infr
astr
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astr
uct
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10 C
FR 5
0.90
Lice
nse
Amen
dmen
t10
CFR
50.
69Sp
ecia
l Tre
atm
ent
10 C
FR 5
0.48
(c)
NFP
A 80
510
CFR
Par
t 52
New
Rea
ctor
s
RG
117
4RG
117
4RG
1.1
74RG
1.20
1RG
1.20
5RG
1.20
6RG
1.1
74RG
1.1
74RG
1.2
01RG
1.2
05RG
1.2
06
Nat
iona
lPRA
Cons
ensu
sSt
anda
rds
RG
1.2
00
NU
REG
/CR
1792
Fire
PRA
FAQ
s
Nat
iona
l PRA
Con
sens
us S
tand
ards
and
Indu
stry
Rel
ated
Gui
danc
eN
UREG
/CR-
6850
Fire
PRA
Met
hods
NU
REG
/CR-
6823
NU
REG
-185
5
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NU
REG
/CR-
1792
HRA
Met
hods
QU
G/C
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met
er E
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5Ad
dres
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intie
s
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PR
ASt
anda
rdP
RA
Stan
dard
Wh
y?W
hy?
PR
A S
tan
dard
P
RA
Sta
nda
rd ––
Wh
y?W
hy?
At
bilit
Toen
sure
the
PR
Ain
sigh
tsan
dre
sults
Acce
ptab
ility
To e
nsur
e th
e P
RA
insi
ghts
and
resu
lts
are
suffi
cien
tly a
dequ
ate
to b
e us
ed in
de
cisi
onm
akin
g
Cons
iste
ncy
To p
rovi
de c
onsi
sten
t und
erst
andi
ng
rega
rdin
g th
e de
velo
pmen
t of a
PR
A m
odel
Tran
spar
ency
To e
nabl
e in
depe
nden
t und
erst
andi
ng
of th
e P
RA
mod
el a
nd it
s re
sults
Cost
-Eff
ectiv
enes
sTo
enc
oura
ge ri
sk-in
form
ed
deci
sion
mak
ing
toen
hanc
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gula
tory
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deci
sion
mak
ing
to e
nhan
ce re
gula
tory
an
d lic
ense
e pr
oces
ses
and
prac
tices
-
PR
ASt
anda
rds
PR
ASt
anda
rds
Obj
ecti
veO
bjec
tive
PR
A S
tan
dard
s P
RA
Sta
nda
rds
--O
bjec
tive
Obj
ecti
ve
Es
tabl
ishe
s th
e te
chni
cal r
equi
rem
ents
for
a b
ase
PRA
for
a sp
ecifi
c ap
plic
atio
n
Esta
blis
hes
apr
oces
sfo
rde
term
inin
gth
ene
eded
Es
tabl
ishe
s a
proc
ess
for
dete
rmin
ing
the
need
ed
scop
e, le
vel o
f de
tail,
pla
nt s
peci
ficity
, and
rea
lism
of
base
PRA
for
a sp
ecifi
c ap
plic
atio
n
Esta
blis
hes
the
requ
irem
ents
for
a P
RA
conf
igur
atio
n co
ntro
l pro
cess
to
ensu
re t
hat
the
base
PRA
repr
esen
ts
the
as-b
uilt
and
as-o
pera
ted
plan
tth
e as
built
and
as
oper
ated
pla
nt
Esta
blis
hes
the
requ
irem
ents
for
a p
eer
revi
ew
addr
essi
ng t
he r
evie
w p
roce
ss, t
eam
qua
lific
atio
ns, an
d
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docu
men
tatio
n
-
PR
A S
tan
dard
Con
ten
tsP
RA
Sta
nda
rd C
onte
nts
Intro
duct
ion
Def
initi
ons
Part
1
Part
s 2-1
0H
azar
d Sp
ecifi
c R
equi
rem
ents
The
requ
irem
ents
are
spec
ific
to
the
haza
rdun
derc
onsi
dera
tion
App
licat
ion
Proc
ess
Gen
eric
Part
1G
ener
al
Req
uire
men
tsC
omm
on
the
haza
rd u
nder
con
side
ratio
n
Spec
ific
tech
nica
l
Con
figur
atio
nC
ontro
l
Gen
eric
Te
chni
cal R
eqs
acro
ss a
ll th
e ha
zard
sSp
ecifi
c te
chni
cal
requ
irem
ents
to
the
haza
rd
Spec
ific
peer
revi
ew
Gen
eric
Peer
Rev
iew
pp
requ
irem
ents
to th
e ha
zard
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PR
AP
RA
Stan
dard
Tech
nic
alSt
anda
rdTe
chn
ical
Req
uir
emen
tsR
equ
irem
ents
PR
A
PR
A S
tan
dard
Tec
hn
ical
St
anda
rd T
ech
nic
al R
equ
irem
ents
Req
uir
emen
ts
Hd
G
Haz
ard
Gro
ups
–Sp
ecifi
es t
he d
iffer
ent
plan
t ch
alle
nges
for
whi
ch r
isk
is
estim
ated
Te
chni
calE
lem
ents
Te
chni
cal E
lem
ents
–D
eter
min
es t
he m
inim
um t
echn
ical
ana
lyse
s th
at n
eed
to b
e pe
rfor
med
in e
valu
atin
g ea
ch h
azar
d
Obj
ecti
ves
–D
escr
ibes
the
goa
ls o
f ea
ch t
echn
ical
ele
men
t
Hig
h Le
vel R
equi
rem
ents
–Se
ts f
orth
the
min
imum
req
uire
men
ts t
o ac
hiev
e th
e ob
ject
ive
ofea
chte
chni
cale
lem
ent
of e
ach
tech
nica
l ele
men
t
Supp
orti
ng R
equi
rem
ents
–Sp
ecifi
es t
he m
inim
um t
echn
ical
req
uire
men
ts t
hat
are
need
ed
to m
eet
the
asso
ciat
ed h
igh
leve
l req
uire
men
t
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gq
-
Exam
ple
ofTe
chn
ical
Elem
ents
Exam
ple
ofTe
chn
ical
Elem
ents
Exam
ple
of T
ech
nic
al E
lem
ents
Exam
ple
of T
ech
nic
al E
lem
ents
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-
Exam
ple
ofO
bjec
tive
sEx
ampl
eof
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ecti
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Exam
ple
of O
bjec
tive
sEx
ampl
e of
Obj
ecti
ves
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-
Exam
ple
ofH
igh
Exam
ple
ofH
igh
Leve
lReq
uir
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equ
irem
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Exam
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of H
igh
Exam
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of H
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--Lev
el R
equ
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ents
Leve
l Req
uir
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ts
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-
Exam
ple
ofSu
ppor
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gR
equ
irem
ents
Exam
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equ
irem
ents
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-
PR
A S
tan
dard
s Te
chn
ical
P
RA
Sta
nda
rds
Tech
nic
al
Sti
Sti
Ri
tR
it
Supp
orti
ng
Supp
orti
ng
Req
uir
emen
tsR
equ
irem
ents
Capa
bilit
y Ca
tego
ry I
Lev
elof
deta
ilof
py
gy
min
imum
add
ress
ed b
y th
e te
chni
cal r
equi
rem
ent
Supp
ortin
g Re
quire
men
t
Lev
el o
f det
ail o
f pl
ant m
odel
Capa
bilit
y Ca
tego
ry I
Im
inim
um t
o ac
hiev
e “c
urre
nt g
ood
prac
tice”
for
the
tech
nica
lreq
uire
men
t
Requ
irem
ent
Spec
ifies
the
min
imum
w
ith r
egar
d to
leve
l of
deta
il, p
lant
des
ign
and
oper
atio
nal s
peci
ficity
,
Plan
t des
ign
and
oper
atio
nal
spec
ifici
tyth
e te
chni
cal r
equi
rem
ent
Capa
bilit
yCa
tego
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ant
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ifici
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lant
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pabi
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gory
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min
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to
achi
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the
stat
e-of
-the
-art
for
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tech
nica
l req
uire
men
t
resp
onse
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
17
-
PR
AC
onfi
gura
tion
Con
trol
PR
AC
onfi
gura
tion
Con
trol
PR
A C
onfi
gura
tion
Con
trol
PR
A C
onfi
gura
tion
Con
trol
Si
fS
dd
Sect
ion
1-5
of
PR
A S
tan
dard
Req
uire
s a
PRA
Conf
igur
atio
n Co
ntro
l Pro
gram
tha
t co
ntai
nsth
efo
llow
ing
key
elem
ents
:co
ntai
ns t
he fol
low
ing
key
elem
ents
:–
a pr
oces
s fo
r m
onito
ring
PRA
inpu
ts a
nd c
olle
ctin
g ne
w
info
rmat
ion
apr
oces
sth
atm
aint
ains
and
upgr
ades
the
PRA
tobe
cons
iste
nt–
a pr
oces
s th
at m
aint
ains
and
upg
rade
s th
e PR
A to
be
cons
iste
nt
with
the
as-
built
, as-
oper
ated
pla
nt
PRA
mai
nten
ance
and
PRA
upgr
ades
are
spe
cific
ally
def
ined
PR
Aup
grad
esre
quire
sfo
cuse
dpe
erre
view
sof
the
upgr
aded
elem
ents
PR
A up
grad
es r
equi
res
focu
sed
peer
rev
iew
s of
the
upg
rade
d el
emen
ts
–a
proc
ess
that
ens
ures
tha
t th
e cu
mul
ativ
e im
pact
of
pend
ing
chan
ges
is c
onsi
dere
d w
hen
appl
ying
the
PRA
–a
proc
ess
that
mai
ntai
nsco
nfig
urat
ion
cont
rolo
fco
mpu
ter
code
s
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
18
–a
proc
ess
that
mai
ntai
ns c
onfig
urat
ion
cont
rol o
f co
mpu
ter
code
s us
ed t
o su
ppor
t PR
A
-
PR
A S
tan
dard
PR
A S
tan
dard
Pee
rR
evie
wR
equ
irem
ents
Pee
rR
evie
wR
equ
irem
ents
Pee
r R
evie
w R
equ
irem
ents
Pee
r R
evie
w R
equ
irem
ents
Revi
ew P
roce
ss
Requ
irem
ents
A w
ritte
n pr
oces
s th
at d
efin
es t
he o
bjec
tive
and
purp
ose
and
prov
ides
the
rev
iew
app
roac
hq
Revi
ew F
requ
ency
Re
quire
men
tsO
nly
a si
ngle
com
plet
e pe
er r
evie
w is
nec
essa
ry
prio
rto
usin
ga
PRA
unle
ssth
ePR
Ais
upgr
aded
Requ
irem
ents
Team
Com
posi
tion
and
Qua
lific
atio
n
prio
r to
usi
ng a
PRA
unle
ss t
he P
RA
is u
pgra
ded
Pers
onne
l with
the
exp
ertis
e to
ass
ess
all P
RA
Elem
ents
and
have
the
colle
ctiv
ekn
owle
dge
of
Revi
ew E
lem
ent
Requ
irem
ents
QRe
quire
men
ts
The
revi
ewer
to
dete
rmin
e th
e sp
ecifi
c sc
ope
and
dth
fth
if
hPR
Al
t
Elem
ents
and
hav
e th
e co
llect
ive
know
ledg
e of
th
e pl
ant
desi
gn a
nd o
pera
tion
Requ
irem
ents
Doc
umen
tatio
n Re
quire
men
tsSu
ffic
ient
doc
umen
tatio
n to
dem
onst
rate
tha
t th
e re
view
pro
cess
app
ropr
iate
ly im
plem
ente
d th
e i
it
dd
tti
fth
dept
h of
the
rev
iew
of
each
PRA
elem
ent
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
19
revi
ew r
equi
rem
ents
, and
doc
umen
tatio
n of
the
pe
er r
evie
w r
esul
ts
-
Pee
r R
evie
w I
nte
rfac
e w
ith
P
eer
Rev
iew
In
terf
ace
wit
h
PR
A S
tan
dard
s an
d St
aff
Rev
iew
sP
RA
Sta
nda
rds
and
Staf
f R
evie
ws
Dl
tf
Pee
r re
view
s f
Lice
nsee
ad
dres
ses
Dev
elop
men
t of
PR
A S
tand
ard
and
supp
ortin
g te
chni
cal
Ed
dpe
rform
ed
on b
ase
PR
A
peer
revi
ew
findi
ngs
guid
ance
Dev
elop
men
t of
PR
Ape
erre
view
End
orse
din
RG
1.2
00P
RA
peer
revi
ew
guid
ance
Obv
iate
s ne
ed
for
in-d
epth
st
affr
evie
wof
Lice
nsee
sub
mits
ris
k-in
form
ed
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
20
staf
f rev
iew
of
base
PR
Aap
plic
atio
n
-
Pee
rR
evie
wP
eer
Rev
iew
Ben
efit
sB
enef
its
Pee
r R
evie
w
Pee
r R
evie
w --
Ben
efit
sB
enef
its
O
vera
ll en
hanc
emen
t of
all
licen
see
PRAs
O
vera
ll co
nsis
tenc
y in
indu
stry
app
roac
hes
Eh
ti
dt
ti
Enha
ncem
ents
in d
ocum
enta
tion
Co
nfid
ence
in t
he P
RA
can
incr
ease
its
use
in d
esig
n an
dop
erat
iona
ldec
isio
nsan
d op
erat
iona
l dec
isio
ns
Obv
iate
s th
e ne
ed f
or a
n in
-dep
th r
evie
w o
f th
e ba
se
PRA
by t
he N
RC
revi
ewer
s–
NRC
focu
ses
on t
he li
cens
ee’s
res
olut
ion
of p
eer
revi
ew
findi
ngs
as t
hey
impa
ct t
he s
peci
fic a
pplic
atio
n an
d on
the
ris
k im
pact
s of
the
spe
cific
app
licat
ion
(mor
e ef
ficie
nt u
se o
f )
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
21
reso
urce
s)
-
Pee
rR
evie
wC
onsi
dera
tion
By
NR
CP
eer
Rev
iew
Con
side
rati
onB
yN
RC
Pee
r R
evie
w C
onsi
dera
tion
By
NR
CP
eer
Rev
iew
Con
side
rati
on B
y N
RC
W
hen
the
base
PRA
com
plie
s w
ith t
he s
tand
ard
as
endo
rsed
in R
G 1
.200
, a
deta
iled
revi
ewof
the
bas
e PR
Ais
typi
cally
not
cons
ider
edne
cess
ary
PRA
is t
ypic
ally
not
con
side
red
nece
ssar
y
The
staf
f al
way
s re
serv
es t
he r
ight
to
audi
tth
e ba
se
PRA
Th
e st
aff
will
alw
ays
exam
ine
the
mod
ifica
tions
to t
he
PRA
that
are
mad
e to
sup
port
an
appl
icat
ion
Th
est
aff
will
also
conf
irmth
atap
prop
riate
chan
ges
are
Th
e st
aff
will
als
o co
nfirm
tha
t ap
prop
riate
cha
nges
are
m
ade
to a
ddre
ss a
n em
erge
nt is
sue
not
incl
uded
in t
he
orig
inal
PRA
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
22
-
Pee
rR
evie
wO
bser
vati
ons
Pee
rR
evie
wO
bser
vati
ons
Pee
r R
evie
w O
bser
vati
ons
Pee
r R
evie
w O
bser
vati
ons
PR
A qu
ality
det
erm
inat
ion
clos
ely
tied
to in
dust
ry p
eer
revi
ew
PRA
usab
ility
impa
cted
bylo
ngst
andi
ngun
reso
lved
PR
A us
abili
ty im
pact
ed b
y lo
ng-s
tand
ing
unre
solv
ed
peer
rev
iew
fin
ding
s
PRA
docu
men
tatio
n is
sues
are
impo
rtan
t an
d ne
ed t
o p
be fix
ed
Peer
rev
iew
s of
new
PRA
Stan
dard
haz
ard
grou
ps (
fire,
se
ism
iclo
wpo
wer
/shu
tdow
n)ne
edN
RC
obse
rvat
ion
seis
mic
, low
pow
er/s
hutd
own)
nee
d N
RC
obse
rvat
ion
to g
ain
appr
ecia
tion
and
conf
iden
ce in
pee
r re
view
im
plem
enta
tion
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
23
-
Cu
rren
tSc
ope
ofC
urr
ent
Scop
eof
PR
AP
RA
Stan
dard
Stan
dard
Cu
rren
t Sc
ope
of
Cu
rren
t Sc
ope
of P
RA
P
RA
Sta
nda
rdSt
anda
rd
R
eact
or T
ype
–Es
timat
es t
he r
isk
for
Ligh
t W
ater
Rea
ctor
s (L
WRs)
Pl
ant
Stag
eg–
Estim
ates
the
ris
k fo
r O
pera
ting
Plan
ts
Plan
t R
isk
–Ev
alua
tes
the
risk
from
the
reac
tor
core
–Ev
alua
tes
the
risk
from
the
rea
ctor
cor
e–
Estim
ates
CD
F an
d LE
RF
Pl
ant
Chal
leng
esE
lt
thi
kf
it
ld
tlh
d–
Eval
uate
s th
e ris
k fr
om in
tern
al a
nd e
xter
nal h
azar
ds
Plan
t O
pera
ting
Mod
es–
Eval
uate
s th
e ris
k fr
om a
t-po
wer
con
ditio
ns
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
24
p
-
PR
ASt
anda
rds
Dev
elop
men
tP
RA
Stan
dard
sD
evel
opm
ent
PR
A S
tan
dard
s D
evel
opm
ent
PR
A S
tan
dard
s D
evel
opm
ent
lC
/(
S/
SS
2009
)f
l
Leve
l 1 C
DF/
LER
F(A
SME/
ANS
RA-
Sa-2
009)
for
low
po
wer
/sh
utd
own
Le
vel 1
CD
F/LE
RF
(ASM
E/AN
S RA-
Sa-2
009)
for
new
re
acto
rs
Le
vel 2
(AN
S/AS
ME
58.x
x) f
or o
pera
tin
g an
d n
ew
reac
tors
Le
vel 3
(AN
S/AS
ME
58.x
x) f
or o
pera
tin
g an
d n
ew
reac
tors
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
25
-
PR
AQ
ual
ity
Expe
ctat
ion
sB
ackg
rou
nd
PR
AQ
ual
ity
Expe
ctat
ion
sB
ackg
rou
nd
PR
A Q
ual
ity
Expe
ctat
ion
s B
ackg
rou
nd
PR
A Q
ual
ity
Expe
ctat
ion
s B
ackg
rou
nd
Dec
embe
r 2
00
3
Com
mis
sion
issu
ed S
RM
CO
MN
JD-0
3-00
02,
PRA
Qua
lity
Expe
ctat
ions
and
Re
quire
men
tsJu
ly2
00
4Ju
ly 2
00
4
Staf
f is
sued
SEC
Y-04
-011
8, P
lan
for
the
Impl
emen
tatio
n of
the
Com
mis
sion
's P
hase
d Ap
proa
ch to
Pro
babi
listic
Ris
k As
sess
men
t Qua
lity
–Sp
ecifi
cally
add
ress
ed if
a li
cens
ee s
ubm
itted
an
appl
icat
ion
even
p
ypp
thou
gh t
heir
PRA
did
not
addr
ess
the
avai
labl
e an
d N
RC-
endo
rsed
PR
A st
anda
rds
and
regu
lato
ry g
uida
nce
need
ed f
or t
hat
spec
ific
appl
icat
ion
afte
r th
e st
anda
rds
have
bee
n de
velo
ped
cove
ring
the
antic
ipat
edap
plic
atio
nsan
ticip
ated
app
licat
ions
–Th
e st
aff
prop
osed
tha
t su
ch li
cens
e ap
plic
atio
ns s
houl
d be
rej
ecte
dO
ctob
er 2
00
4
Com
mis
sion
app
rove
d th
e st
aff
plan
and
the
rec
omm
ende
d st
aff
posi
tions
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
26
ppp
p
-
Reg
ula
tory
Gu
ide
1.2
00
R
egu
lato
ry G
uid
e 1
.20
0
gy
gy
Impl
emen
tati
on B
ackg
rou
nd
Impl
emen
tati
on B
ackg
rou
nd
h2
00
Mar
ch 2
00
7
NRC
issu
ed R
egul
ator
y Is
sue
Sum
mar
y (R
IS)
2007
-06,
Re
gula
tory
Gui
de 1
.200
Im
plem
enta
tion
–In
form
ed li
cens
ees
of h
ow t
he N
RC
will
impl
emen
t its
tec
hnic
al
adeq
uacy
rev
iew
of
plan
t-sp
ecifi
c PR
As u
sed
to s
uppo
rt r
isk-
info
rmed
lice
nsin
g ac
tions
Li
mite
d-sc
ope
appl
icat
ions
wer
eal
low
eda
one-
year
Lim
ited
scop
e ap
plic
atio
ns w
ere
allo
wed
a o
neye
ar
impl
emen
tatio
n pe
riod
Im
plem
enta
tion
perio
d al
low
s ad
ditio
nal t
ime
for
licen
sees
to:
–
Dev
elop
or
revi
se t
heir
PRA
–Pe
rfor
mse
lf-as
sess
men
tsan
dan
yne
cess
ary
peer
revi
ews
–Pe
rfor
m s
elf-
asse
ssm
ents
and
any
nec
essa
ry p
eer
revi
ews
–Ad
dres
s an
y fin
ding
s of
the
se r
evie
ws
and
prev
ious
rev
iew
s
Broa
d-sc
ope
risk-
info
rmed
app
licat
ions
are
exp
ecte
d to
mee
t th
e en
dors
ed s
tand
ard
at t
he t
ime
of t
heir
appl
icat
ion
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
27
-
Reg
ula
tory
Gu
ide
1.2
00
, Rev
isio
n 2
R
egu
lato
ry G
uid
e 1
.20
0, R
evis
ion
2
gy
,g
y,
Impl
emen
tati
onIm
plem
enta
tion
Mh
20
09
Mar
ch 2
00
9
Staf
f is
sued
Rev
isio
n 2
of R
G 1
.200
, An
Appr
oach
for
Det
erm
inin
g th
e Te
chni
cal A
dequ
acy
of P
roba
bilis
tic R
isk
Asse
ssm
ent R
esul
ts
for
Risk
-Inf
orm
ed A
ctiv
ities
os
oed
ctte
s–
Prov
ides
NRC
endo
rsem
ent,
with
qua
lific
atio
ns a
nd m
odifi
catio
ns, o
f AS
ME/
ANS
RA-
Sb-2
009,
Sta
ndar
d fo
r Le
vel 1
/Lar
ge E
arly
Rel
ease
Fr
eque
ncy
Prob
abili
stic
Ris
k As
sess
men
t for
Nuc
lear
Pow
er P
lant
Ap
plic
atio
ns.
pp–
Lice
nsee
s ca
n us
e RG
to
dem
onst
rate
the
tec
hnic
al a
dequ
acy
of a
PR
A us
ed in
a r
isk-
info
rmed
lice
nsin
g ac
tion
–St
anda
rd s
ubst
antia
lly e
xpan
ds t
he s
cope
of
the
initi
atin
g ev
ents
ad
dres
sed,
incl
udin
g in
tern
al f
ire, se
ism
ic, w
ind,
ext
erna
l flo
od a
nd
,g
,,
,ot
her
exte
rnal
eve
nts
Reg
ulat
ory
Gui
de 1
.200
, Rev
isio
n 2
–Is
sued
Mar
ch 2
009
–Ef
fect
ive
impl
emen
tatio
nda
teAp
ril20
10
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
28
Effe
ctiv
e im
plem
enta
tion
date
Apr
il 20
10
-
Reg
ula
tory
Gu
ide
1.2
00
, Rev
isio
n 2
R
egu
lato
ry G
uid
e 1
.20
0, R
evis
ion
2
gy
,g
y,
Expe
ctat
ion
sEx
pect
atio
ns
Thff
ii
ki
fd
lii
iRG
120
0
The
staf
f re
view
s ris
k-in
form
ed a
pplic
atio
ns u
sing
RG
1.2
00,
Rev
isio
n 2,
con
sist
ent
with
the
Com
mis
sion
’s g
uida
nce
on P
RA
qual
ity (
COM
NJD
-03-
0002
and
SEC
Y-04
-011
8) a
nd R
IS 2
007-
06
Star
ting
in A
pril
2010
, all
risk-
info
rmed
app
licat
ions
are
exp
ecte
d to
St
at
gp
00,
as
oed
app
cato
sa
ee
pect
edto
conf
orm
with
ASM
E/AN
S RA-
Sb-2
009,
as
endo
rsed
by
RG
1.2
00,
Rev
isio
n 2,
as
appr
opria
te f
or t
he a
pplic
atio
n–
All s
igni
fican
t co
ntrib
utor
s to
the
dec
isio
n (e
ither
impo
rtan
t to
the
delta
or
tota
l ris
k ca
lcul
atio
n) a
re e
xpec
ted
to b
e ev
alua
ted
usin
g ap
prop
riate
PRA
met
hods
f
hh
Cd
dd
dco
nfor
min
g w
ith t
he N
RC-
endo
rsed
PRA
stan
dard
s–
Valid
bou
ndin
g ap
proa
ches
can
be
used
to
addr
ess
the
risk
cont
ribut
ors
not
mod
eled
in t
he li
cens
ee’s
PRA
anal
yses
–Li
cens
ees
may
be
able
to
redu
ce o
r lim
it th
e sc
ope
of t
heir
requ
este
d lic
ensi
ng
actio
nto
redu
ceth
esi
gnifi
canc
eof
spec
ific
cont
ribut
ors
soth
atth
elic
ense
e’s
actio
n to
red
uce
the
sign
ifica
nce
of s
peci
fic c
ontr
ibut
ors
so t
hat
the
licen
see
s PR
A is
ade
quat
e fo
r th
e ap
plic
atio
n–
Lice
nsee
-pro
pose
d co
mpe
nsat
ory
mea
sure
s an
d ac
tions
can
be
used
to
addr
ess
unce
rtai
ntie
s an
d lim
itatio
ns in
the
PRA
mod
elin
g, b
ut c
anno
t be
use
d as
a
subs
titut
e fo
r m
odel
ing
in t
he P
RA
the
cont
ribut
ors
that
are
sig
nific
ant
to t
he
risk
info
rmed
deci
sion
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
29
risk-
info
rmed
dec
isio
n–
The
staf
f w
ill r
ejec
t ris
k-in
form
ed a
pplic
atio
ns n
ot c
onsi
sten
t w
ith t
he a
bove
ex
pect
atio
ns
-
Ris
kR
isk--
Info
rmed
In
form
ed A
pplic
atio
n
App
licat
ion
C
onsi
dera
tion
sof
PR
AA
dequ
acy
Con
side
rati
ons
ofP
RA
Ade
quac
yC
onsi
dera
tion
s of
PR
A A
dequ
acy
Con
side
rati
ons
of P
RA
Ade
quac
yD
eter
min
e th
e PR
A sc
ope,
leve
l of
deta
il, p
lant
spe
cific
ity a
nd r
ealis
m
need
ed t
o su
ppor
t th
e ap
plic
atio
nee
ded
tosu
ppo
tt
eap
pca
to
Det
erm
ine
whe
ther
the
sco
pe o
f th
e ex
istin
g PR
A m
odel
is
adeq
uate
tosu
ppor
tth
ede
cisi
onad
equa
te t
o su
ppor
t th
e de
cisi
on
Det
erm
ine
if th
e PR
A St
anda
rd is
ade
quat
e to
su
ppor
t th
e de
cisi
on
Det
erm
ine
if th
e ex
istin
g PR
A m
odel
satis
fies
the
appl
icat
ion
mod
el s
atis
fies
the
appl
icat
ion
port
ions
of
the
Stan
dard
Upd
ate
PRA
and
lt
Std
d
Augu
st 2
7Au
gust
27--
31, 2
012
31, 2
012
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
30
supp
lem
ent
Stan
dard
, as
nee
ded
-
The
End
The
End
The
End
The
End
Que
stio
ns &
Ans
wer
s…..
Que
stio
ns &
Ans
wer
s…..
RIS
KRIS
K--IN
FORM
ED R
EGU
LATI
ON
SEM
INAR
INFO
RM
ED R
EGU
LATI
ON
SEM
INAR
Mex
ico
City
, Mex
ico
Mex
ico
City
, Mex
ico
Augu
st 2
7Au
gust
27--
31, 20
12
31, 20
12
3131
