ng ki nrc public meeting on filtering strategies rulemaking · review from december 12, 2013 public...
TRANSCRIPT
Filt
iSt
ti
Rl
kiFi
lterin
g St
rate
gies
Rul
emak
ing
Tech
nica
l Eva
luat
ion
Ric
k W
acho
wia
k (E
PR
I): E
PR
I Pro
ject
Man
ager
Jeff
Gab
or (E
RIN
): In
vest
igat
orD
oug
True
(ER
IN):
Inve
stig
ator
Dav
id L
uxat
(ER
IN):
Inve
stig
ator
NR
C P
ublic
Mee
ting
on F
ilter
ing
Stra
tegi
es R
ulem
akin
gA
pril
30, 2
014
Gen
eral
App
roac
h to
Filt
erin
g St
rate
gies
Rul
emak
ing
Tech
nica
l Ana
lysi
sy
•Bui
ld o
ff of
SE
CY
-12-
0157
met
hodo
logy
usi
ng S
OA
RC
A
refe
renc
e pl
ant
p•A
lign
assu
mpt
ions
with
NR
C a
sses
smen
t as
muc
h as
po
ssib
le•E
xplic
it an
alys
is o
f all
scen
ario
s•C
onsi
der r
isk
and
Def
ense
in D
epth
•Cos
tBen
efit
Ana
lysi
s•C
ost-B
enef
it A
naly
sis
•Add
ress
spe
ctru
m o
f sen
sitiv
ities
–In
clud
eke
ypl
ant-t
o-pl
antv
aria
bilit
yIn
clud
e ke
y pl
antt
opl
ant v
aria
bilit
y
2©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Rev
iew
from
Dec
embe
r 12,
201
3 Pu
blic
M
eetin
gM
eetin
g•
Gen
eral
ass
umpt
ions
–E
LAP
ass
umin
g FL
EX
per
EA
-12-
049,
EA
-13-
109,
Rev
.3 E
PG
/SA
Gs
–In
itial
RP
V p
ress
ure
cont
rol
•10
min
con
trol 8
00-1
000
psig
•1
hour
beg
in 8
0°F/
hrco
oldo
wn.
Con
trol b
etw
een
200-
400
psig
–R
CIC
suc
tion
from
poo
l with
tem
pera
ture
lim
it of
240
°F
–FL
EX
flow
of50
0gp
mat
200
psig
shut
off
FLE
X fl
ow o
f 500
gpm
at 2
00 p
sig
shut
off
–M
SL
rupt
ure
from
ME
LCO
R a
ssum
ed a
t cor
e sl
ump
–S
RV
sei
zure
from
ME
LCO
R a
ssum
ed 1
hou
r afte
r cor
e da
mag
e–
Con
tain
men
t ven
ting
•A
ntic
ipat
ory
WW
vent
at15
psig
(prio
rto
core
dam
age)
•A
ntic
ipat
ory
WW
ven
t at 1
5 ps
ig (p
rior t
o co
re d
amag
e)•
Isol
atio
n of
initi
al v
ent u
pon
entry
into
SA
MG
•U
pon
entry
into
SA
G, v
entin
g at
PS
P (3
0 ps
ig)
•U
pon
vess
el b
reac
h, v
entin
g at
PC
PL
(60
psig
)F
tli
li
i20
idt
lbd
•Fo
r ven
t cyc
ling
anal
ysis
, ass
umin
g 20
psi
dco
ntro
l ban
d–
Con
tain
men
t fai
lure
•Li
ner m
elt-t
hrou
gh•
Hea
d fla
nge
leak
age
per S
OA
RC
A
3©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
•U
ltim
ate
failu
re p
er C
B&
I
Alte
rnat
ives
1.B
ase
Cas
e –
FLE
X in
ject
ion
to R
PV
, EA
-13-
109,
Rev
. 3 E
PG
/SA
Gs
2.R
elia
ble
mak
eup
toth
eR
PV
2.R
elia
ble
mak
eup
to th
e R
PV
2A.
Opt
ion
1 pl
us re
liabl
e m
akeu
p to
RP
V2B
.O
ptio
n 2A
plu
s W
W/D
W v
ent c
yclin
g2C
. O
ptio
n 2B
plu
s w
ater
man
agem
ent t
o pr
even
t the
nee
d fo
r DW
ven
ting
2D.
Opt
ion
2A p
lus
wat
er m
anag
emen
t to
prev
ent t
he n
eed
for D
W v
entin
g3.
Rel
iabl
e m
akeu
p to
DW
3A.
Opt
ion
1 pl
us re
liabl
e m
akeu
p to
DW
3BO
ptio
n3A
plus
WW
/DW
vent
cycl
ing
3B.
Opt
ion
3A p
lus
WW
/DW
ven
t cyc
ling
3C.
Opt
ion
3B p
lus
wat
er m
anag
emen
t to
prev
ent t
he n
eed
for D
W v
entin
g3D
.O
ptio
n 3A
plu
s w
ater
man
agem
ent t
o pr
even
t the
nee
d fo
r DW
ven
ting
4.S
mal
l Filt
er4A
.O
ptio
n 3A
plu
s sm
all f
ilter
4B.
Plan
to a
lso
addr
ess
Alte
rnat
ive
2A w
ith S
mal
l Filt
er5.
Larg
e Fi
lter
5AO
ptio
n3A
plus
larg
efil
ter
4©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
5A.
Opt
ion
3A p
lus
larg
e fil
ter
5B.
Plan
to a
lso
addr
ess
Alte
rnat
ive
2A w
ith L
arge
Filt
er
Cor
e D
amag
e Sc
enar
io D
evel
opm
ent
5©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Cor
e D
amag
e To
p Ev
ents
•E
LAP
–To
tal l
oss
of o
ffsite
and
ons
ite A
C/D
C p
ower
•E
AR
LY-R
CIC
–R
CIC
ava
ilabl
e to
ope
rate
initi
ally
•FL
EX
–FL
EX
impl
emen
tatio
n su
cces
sful
for i
njec
tion
pum
p an
d D
C p
ower
for p
ress
ure
cont
rol
•W
W-V
EN
T–
Wet
wel
lven
t suc
cess
ful f
or e
xten
ded
RC
IC o
pera
tion
•D
W-V
EN
T–
Dry
wel
l ven
t suc
cess
ful f
or e
xten
ded
RC
IC o
pera
tion
•R
PV-P
RES
SO
tf
llt
lRP
Vt
td
RC
ICti
–O
pera
tors
suc
cess
fully
con
trol R
PV
pre
ssur
e to
ext
end
RC
IC o
pera
tion
•E
AR
LY-F
LEX
–Fo
r sce
nario
s w
ith fa
ilure
of E
AR
LY-R
CIC
, FLE
X im
plem
enta
tion
to p
reve
nt c
ore
dam
age
•LA
TE-F
LEX
Fors
cena
rios
with
succ
ess
ofE
AR
LYR
CIC
and
FLE
XFL
EX
impl
emen
tatio
nla
teaf
terl
oss
ofR
CIC
able
–Fo
r sce
nario
s w
ith s
ucce
ss o
f EA
RLY
-RC
IC a
nd F
LEX,
FLE
X im
plem
enta
tion
late
afte
r los
s of
RC
IC a
ble
to p
reve
nt c
ore
dam
age
•C
ON
T-IS
OL
–If
vent
ing
was
per
form
ed p
rior t
o co
re d
amag
e, th
is n
ode
addr
esse
s th
e su
cces
sful
clo
sure
of t
hat v
ent
path
upo
n en
try in
to th
e S
AG
s
6©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Acc
iden
t Pro
gres
sion
Eve
nt T
ree
7©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
APE
T To
p Ev
ents
•R
PV-P
RES
S–
This
nod
e ad
dres
ses
the
pote
ntia
l for
eith
er a
n S
RV
sei
zing
ope
n or
cre
ep ru
ptur
e of
the
mai
n st
eam
line
du
ring
the
core
dam
age
phas
e of
the
acci
dent
. Th
e sp
lit fr
actio
ns w
ill b
e in
fluen
ced
by th
e en
try
cond
ition
forR
PV
pres
sure
asde
fined
byth
eco
reda
mag
est
ate
cond
ition
for R
PV
pre
ssur
e as
def
ined
by
the
core
dam
age
stat
e.•
IVR –
Sho
uld
inje
ctio
n be
pro
vide
d to
the
RP
V a
fter t
he o
nset
of c
ore
dam
age
but p
rior t
o ve
ssel
bre
ach,
ther
e is
som
e lik
elih
ood
that
ves
sel b
reac
h ca
n be
avo
ided
.•
WTR
-INJE
CT
–W
ater
inje
ctio
n in
to th
e R
PV
or i
nto
the
dryw
ell i
s co
nsid
ered
her
e. T
he in
ject
ion
is e
ither
ava
ilabl
e pr
ior
to v
esse
l bre
ach
or fo
llow
ing
vess
el b
reac
h. D
efin
ed b
y al
tern
ativ
e be
ing
cons
ider
ed.
•E
CF
–Th
is e
vent
eva
luat
es th
e po
tent
ial f
or e
arly
dry
wel
l fai
lure
as
a re
sult
of v
esse
l bre
ach
and
the
disc
harg
e of
cor
e m
ater
ial i
nto
cont
ainm
ent.
With
out w
ater
inje
ctio
n, th
e lik
elih
ood
of li
ner m
elt t
hrou
gh (L
MT)
is
jg
()
cons
ider
ed h
igh.
Thi
s no
de c
an a
lso
addr
ess
the
pote
ntia
l for
con
tain
men
t fai
lure
resu
lting
from
hig
h pr
essu
re m
elt e
ject
ion.
•
MC
CI
–Fo
r cas
es w
ith s
ucce
ssfu
l inj
ectio
n of
wat
er in
to c
onta
inm
ent,
this
eve
nt e
valu
ates
the
pote
ntia
l for
cor
e de
bris
que
nchi
ng, t
here
by s
topp
ing
the
mol
ten
core
con
cret
e in
tera
ctio
n.•
WW
-VE
NT
–W
etw
ellv
entin
g is
initi
ally
use
d fo
r con
tain
men
t pre
ssur
e co
ntro
l (La
ter D
W v
entin
g as
sum
ed a
fter W
W
vent
isol
atio
n pe
r SA
Gs)
•D
W-V
EN
TIf
the
wet
wel
lven
tfai
lsto
oper
ate
the
dryw
ellv
entw
illbe
used
forc
onta
inm
entp
ress
ure
cont
rol
8©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
–If
the
wet
wel
lven
t fai
ls to
ope
rate
, the
dry
wel
l ven
t will
be u
sed
for c
onta
inm
ent p
ress
ure
cont
rol.
MA
AP5
/Win
MA
CC
SEx
ecut
ion
•E
xecu
tion
of 5
070
indi
vidu
al
MA
AP
5.0
2 an
d W
inM
AC
CS
calc
latio
nsca
lcul
atio
ns–
13 C
ore
Dam
age
ends
tate
s–
39 A
PE
T en
dsta
tes
EP
RI’s
new
“Pho
ebe”
HP
C s
yste
m
–O
vera
ll 50
7 en
dsta
tes
for
each
filte
ring
stra
tegy
–10
stra
tegi
es•
Pyt
hon
used
to c
onst
ruct
in
divi
dual
MA
AP
5 in
puts
from
C
DE
T an
d A
PE
T st
ruct
ure
Aut
omat
edtra
nsfe
rfro
mM
AA
P5
•A
utom
ated
tran
sfer
from
MA
AP
5 to
Win
MA
CC
S•
Sen
sitiv
ity ru
ns b
eing
def
ined
an
dex
ecut
edno
w
9©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
and
exec
uted
now
Win
MA
CC
SA
naly
sis
•Cur
rent
resu
lts b
ased
on
a hi
gh-p
opul
atio
n si
te•R
ecei
ved
Pea
chB
otto
mM
AC
CS
inpu
tfro
mth
eN
RC
and
•Rec
eive
d P
each
Bot
tom
MA
CC
S in
put f
rom
the
NR
C a
nd
are
in th
e pr
oces
s of
re-ru
nnin
g al
l cal
cula
tions
–In
tere
sted
in u
nder
stan
ding
any
cha
nges
bei
ng
impl
emen
ted
by th
e N
RC
for r
ulem
akin
g an
alys
is
10©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Bas
e C
ase
-Cor
e D
amag
e Ev
ent T
ree
Impo
rtant
Con
tribu
tors
to C
ore
Dam
age
Seq
N
ame
Des
crip
tion
Cor
e D
amag
e Ti
min
gC
D
Freq
uenc
y%
of C
DD
omin
ant C
ontri
buto
r(s)
% o
f P
DS
% o
f CD
FA
PE
T Im
plic
atio
nsFL
EX
Faile
ddu
eto
hum
aner
rors
Not
due
CD
-002
RC
IC &
Ear
ly V
entin
g S
ucce
ed, F
LEX
fails
late
, Con
t. R
e-is
olat
ed24
+ hr
s2.
29E
-07
3%O
pera
tors
fail
to d
epol
y FL
EX
in a
tim
ely
man
ner
17%
0%FL
EX
Fai
led
due
to h
uman
err
ors.
Not
due
to
lim
ited
time
FLE
X H
ardw
are
failu
res
83%
2%FL
EX
har
dwar
e un
avai
labl
e
CD
-003
RC
IC &
Ear
ly V
entin
g S
ucce
ed, F
LEX
fails
late
, WW
Ven
t N
otR
e-Is
olat
ed24
+ hr
s5.
72E
-08
0.7%
Ope
rato
rs fa
il to
dep
oly
FLE
X in
a ti
mel
y m
anne
r &
don
't re
-isol
ate
Con
t.17
%0.
12%
Mul
tiple
hum
an fa
ilure
s
FLE
X H
ardw
are
failu
res
83%
0.62
%FL
EX
har
dwar
e un
avai
labl
e
CD
-005
RC
IC L
ost o
n E
D, F
LEX
Fai
ls, C
ont.
Re-
Isol
ated
~12
hrs
1.59
E-0
72%
Ope
rato
r fai
lure
to c
ontro
l pre
ssur
e an
d de
ploy
FL
EX
100%
2%M
any
hum
an fa
ilure
s
Ope
rato
rfai
lure
toco
ntro
lpre
ssur
ede
ploy
FLE
XM
any
hum
anfa
ilure
sAN
DW
Wve
ntis
CD
-006
RC
IC L
ost o
n E
D, F
LEX
Fai
ls, W
W V
ent N
otR
e-Is
olat
ed~1
2 hr
s7.
28E
-08
0.9%
Ope
rato
r fai
lure
to c
ontro
l pre
ssur
e, d
eplo
y FL
EX
an
d cl
ose
vent
100%
1%M
any
hum
an fa
ilure
s AN
DW
W v
ent i
s O
pen
CD
-008
RC
IC &
Ear
ly D
W V
entin
g S
ucce
ed, F
LEX
fails
late
, Con
t. R
e-is
olat
ed24
+ hr
s2.
54E
-09
0.03
%O
pera
tors
fail
to d
epol
y FL
EX
in a
tim
ely
man
ner
17%
0%FL
EX
Fai
led
due
to h
uman
err
ors.
Not
due
to
lim
ited
time
FLE
X H
ardw
are
failu
res
83%
0%FL
EX
har
dwar
e un
avai
labl
e
CD
-009
RC
IC &
Ear
ly D
W V
entin
g S
ucce
ed, F
LEX
fails
late
, DW
V
ent O
pen
24+
hrs
6.35
E-1
00.
01%
Ope
rato
rs fa
il to
dep
oly
FLE
X in
a ti
mel
y m
anne
r &
don
't re
-isol
ate
Con
t.17
%0.
00%
Mul
tiple
hum
an fa
ilure
s
FLE
X H
ardw
are
failu
res
83%
0.01
%FL
EX
har
dwar
e un
avai
labl
eO
pera
torf
ailu
reto
cont
rolp
ress
ure
and
depl
oyC
D-0
11R
CIC
Los
t on
ED, F
LEX
Fai
ls, D
W V
ent R
e-Is
olat
ed~1
2 hr
s1.
76E
-09
0.02
%O
pera
tor f
ailu
re to
con
trol p
ress
ure
and
depl
oy
FLE
X10
0%0%
Man
y hu
man
failu
res
CD
-012
RC
IC L
ost o
n E
D, F
LEX
Fai
ls, D
W V
ent N
otR
e-Is
olat
ed~1
2 hr
s8.
08E
-10
0.01
%O
pera
tor f
ailu
re to
con
trol p
ress
ure,
dep
loy
FLE
X
and
clos
e D
W v
ent
100%
0%M
any
hum
an fa
ilure
s A
ND
DW
ven
t is
Ope
nC
D-0
14R
CIC
Ear
ly, C
ont.
Not
Ven
ted,
RC
IC L
ost o
n S
P-T
24+
hrs
1.30
E-0
80.
2%O
pera
tor f
ailu
re to
con
trol S
P-T
100%
0%S
ingl
e hu
man
failu
re
CD
-016
RC
IC S
ucce
eds
Ear
ly (0
-6 h
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ucce
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Ven
ting,
ED
~12
hrs
1.97
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73%
Ope
rato
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il to
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t10
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rato
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il to
ear
ly v
ent.
CD
-017
RC
IC S
ucce
eds
Ear
ly (0
-6 h
rs),
FLE
X L
ate/
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vail
~8 h
rs1.
7E-0
6/yr
22%
Ope
rato
rs F
ail t
o D
eplo
y FL
EX
100%
22%
Hum
an e
rror
s w
ith F
LEX
(due
to P
SFs
ot
her t
han
time
avai
l)
CD
-019
RC
IC F
ails
Ear
ly, O
pera
tor E
D, F
LEX
Lat
e/U
nava
il~1
hr
2.5E
-06/
yr33
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CIC
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e FL
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can
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depl
oyed
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o pr
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an fa
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rato
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ithin
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ilabl
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me
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EX
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led
due
to h
uman
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ors,
but
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to
lim
ited
time
CD
-020
RC
IC F
ails
Ear
ly, N
o ED
, FLE
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2.75
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one.
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.O
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., lo
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11©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Pre
limin
ary
resu
lts
Scen
ario
Tim
ing
24+
hrs
4%~1
2 hr
s6%
~8 h
rs22
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%
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1 hr
68%
12©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Pre
limin
ary
resu
lts
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Cor
e D
amag
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ultin
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ss o
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frast
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quip
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res
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nt E
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13©
201
4 E
lect
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ower
Res
earc
h In
stitu
te, I
nc. A
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.
Pre
limin
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e C
ase
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Res
ults
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ults
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terp
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CD
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CD
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CD
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CD
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CD
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CD
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CD
-011
CD
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CD
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CD
-016
CD
-017
CD
-019
CD
-020
Tota
lsM
SL
4.01
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91.
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1.13
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85.
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4.44
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11.
11E
-11
1.25
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73E
-11
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02.
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1.21
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00E
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1.39
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1.55
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97.
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1.49
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62.
54E
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66.
79E
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97.
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8.35
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93.
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3.29
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18.
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9.26
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14.
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6.84
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7.16
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03.
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86E
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4.65
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4.88
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92.
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86E
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73E
-10
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00E
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00E
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80%
DR
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02E
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24E
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-09
4.63
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07.
46E
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71.
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2.45
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62.
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694
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Pat
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96.
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2.92
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82.
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8.18
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8.36
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91.
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04E
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84.
17E
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2.24
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95.
53E
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1.01
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1.70
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tain
men
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14©
201
4 E
lect
ric P
ower
Res
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h In
stitu
te, I
nc. A
ll rig
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rese
rved
.
Pre
limin
ary
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F
CD
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ucce
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3%O
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ent N
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ly D
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res
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-011
RC
IC L
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D, F
LEX
Fai
ls, D
W V
ent R
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pera
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-012
RC
IC L
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ent N
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CD
-014
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arly
, Con
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CIC
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CD
-016
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ly (0
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3%O
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CD
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ly (0
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-019
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IC F
ails
Ear
ly, O
pera
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D, F
LEX
Lat
e/U
nava
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yr33
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CIC
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dwar
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%
15©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
CD
-020
RC
IC F
ails
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16©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
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rese
rved
.
1.0
Con
ditio
nal C
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ailu
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roba
bilit
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LAP)
0.8
0.9
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17©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Cas
eM
UR
PV
w
/VC
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w
/VC
&
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w
/WM
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w/V
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&
WM
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Mw
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lter
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limin
ary
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isk
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ativ
e to
the
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e C
ase
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0.9
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k
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0.1
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e C
2A-R
PV
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MU
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DW
/V
C3C
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W
/VC
&3D
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W
/WM
4 -3
A /S
5 -3
A /L
18©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Cas
eM
UR
PV
w/V
CR
PV
w/V
C &
W
M
RPV
w
/WM
MU
w/V
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&
WM
w/W
Mw
/Sm
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lter
w/L
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Pre
limin
ary
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1R
isk
Rel
ativ
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the
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e C
ase
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0.9
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k
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k
0.6
0.7
04
0.5
06
02
0.3
0.4
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0.2
19©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
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rese
rved
.
0B
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e w
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Loc
atio
n
80%
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Vess
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In-V
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l
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Bas
e 2A
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V
2B -
2C -
2D -
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DW
3B
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C -
DW
3D
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4 -3
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-3A
20©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Cas
eM
UR
PV
w
/VC
RPV
w
/VC
&
WM
RPV
w
/WM
MU
w/V
Cw
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&
WM
w/W
Mw
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limin
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verp
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el L
iner
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t
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ris In
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40%
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Bas
e 2A
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V
2B -
2C -
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DW
3B
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C -
DW
3D
-D
W
4 -3
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-3A
21©
201
4 E
lect
ric P
ower
Res
earc
h In
stitu
te, I
nc. A
ll rig
hts
rese
rved
.
Cas
eM
UR
PV
w
/VC
RPV
w
/VC
&
WM
RPV
w
/WM
MU
w/V
Cw
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ativ
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ase
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Bas
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V
2B -
2C -
2D -
3A -
DW
3B
-D
W 3
C -
DW
3D
-D
W
4 -3
A 5
-3A
22©
201
4 E
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Cas
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w
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w
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plet
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plan
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23©
201
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stitu
te, I
nc. A
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hts
rese
rved
.
Filte
ring
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Phen
omen
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ical
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c M
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men
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pers
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uman
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ontro
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24©
201
4 E
lect
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ower
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stitu
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)
Toge
ther
…Sh
apin
g th
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ture
of E
lect
ricity