ML111590130

NRC Slides - TMI Public Meeting, June 7, 2011

ML111590130
Person / Time
Site:	Three Mile Island
Issue date:	06/08/2011
From:	Bellamy R NRC/RGN-I/DRP/PB6
To:
bellamy, rr
References
Download: ML111590130 (23)

Text

Th re e Mile Is la n d As s e s s m e n t Me e tin g Th re e Mile Is la n d , Un it 1 S a fe ty P e rfo rm a n c e in 2010 U.S . Nu c le a r P la n t S a fe ty in lig h t o f J a p a n Eve n ts 2010 Re a c to r Ove rs ig h t P ro c e s s Nu c le a r Re g u la to ry Co m m is s io n - Re g io n I 1

Ag e n d a

• In tro d u c tio n

• Dis c u s s io n o f Th re e Mile Is la n d s a fe ty p e rfo rm a n c e

• Dis c u s s io n o f U.S . n u c le a r p la n t s a fe ty in lig h t o f J a p a n e ve n ts

• NRC to a d d re s s p u b lic q u e s tio n s

• Clo s in g re m a rks 2

NRC As s e s s m e n t S u m m a ry

• Exe lo n o p e ra te d Th re e Mile Is la n d s a fe ly a n d in a m a n n e r th a t p re s e rve d th e p u b lic h e a lth a n d s a fe ty a n d p ro te c te d th e e n viro n m e n t.

• Lic e n s e e Re s p o n s e c o lu m n o f th e Ac tio n Ma trix

• Ba s e lin e in s p e c tio n s p la n n e d fo r 2011 3

Th re e Mile Is la n d In s p e c tio n Ac tivitie s in 2010

• ~3800 h o u rs o f in s p e c tio n a n d re la te d a c tivitie s

• 2 re s id e n t in s p e c to rs o n s ite - re s id e n ts p e rfo rm in s p e c tio n s d a ily a n d c a n re s p o n d to p la n t e ve n ts a t a n y tim e

• 13 re g io n a l in s p e c tio n s

• 3 m a jo r te a m in s p e c tio n s

• Permanent Plant Modifications

• Managing Gas Accumulation

• Problem Identification and Resolution 4

Th re e Mile Is la n d P e rfo rm a n c e In d ic a to r a n d In s p e c tio n Re s u lts J a n u a ry 1 th ro u g h De c e m b e r 31, 2010

• All Gre e n P e rfo rm a n c e In d ic a to rs

• 9 Gre e n /S e ve rity Le ve l IV in s p e c tio n fin d in g s

• No g re a te r th a n Gre e n in s p e c tio n fin d in g s 5

Th re e Mile Is la n d NRC Ac tio n Ma trix Licensee Regulatory Degraded Multiple Repetitive Unacceptable Response Response Cornerstone Degraded Performance Cornerstone All Inputs are 1 or 2 White 2 White or 1 Multiple Yellow Overall Green; Inputs; Yellow Input; Inputs or 1 Red Unacceptable Cornerstone Cornerstone Cornerstone Input; Cornerstone Performance; Objectives Objectives Objectives Met w/ Objectives Met w/ Plants not Fully Met Fully Met Moderate Significant permitted to Degradation in Degradation in Operate w/in this Safety Safety Performance Column; Performance Unacceptable Margin to Safety

• In c re a s in g s a fe ty s ig n ific a n c e

• In c re a s in g NRC in s p e c tio n e ffo rts

• In c re a s in g NRC/Lic e n s e e m a n a g e m e n t in vo lve m e n t

• In c re a s in g re g u la to ry a c tio n s

2010 Th re e Mile Is la n d As s e s s m e n t S u m m a ry

• Th re e Mile Is la n d , Un it 1 o p e ra te d s a fe ly

• Lic e n s e e Re s p o n s e c o lu m n o f th e Ac tio n Ma trix

• Ba s e lin e in s p e c tio n s p la n n e d fo r 2011 7

Th re e Mile Is la n d As s e s s m e n t Me e tin g U.S . Nu c le a r P la n t S a fe ty in Lig h t o f J a p a n Eve n ts 8

Fu ku s h im a : Fa c ts We Kn o w To d a y

• 9.0 Ea rth q u a ke

- 4th la rg e s t in th e wo rld s in c e 1900

• Re a c to rs S a fe ly S h u td o wn

• S ite th e n h it b y a ~40 fo o t Ts u n a m i

• Ts u n a m i c a u s e d a lo s s o f a ll e le c tric a l p o we r

Fu ku s h im a : Fa c ts We Kn o w To d a y

• Lo s s o f a ll e le c tric a l p o we r to s a fe ty s ys te m s e ve n tu a lly le d to fu e l damage

• S e c o n d a ry c o n ta in m e n t h yd ro g e n e xp lo s io n s vis ib le a t Un its 1 & 3 s e ve ra l d a ys la te r

• Ra d io lo g ic a l re le a s e s 10

U.S . Co n s id e ra tio n s

• No a n tic ip a te d U.S . He a lth Effe c ts fro m Fu ku s h im a

• U.S . n u c le a r p la n ts re m a in s a fe

- NRC re q u ire s p la n ts to b e d e s ig n e d to with s ta n d e xte rn a l e ve n ts

- NRC re q u ire s a d e fe n s e -in -d e p th a p p ro a c h

- NRC p e rfo rm s in d e p e n d e n t s a fe ty in s p e c tio n s

- NRC a s s e s s e s n e w s a fe ty in fo rm a tio n a n d re q u ire s im p ro ve m e n ts .

• Me th o d ic a l a n d s ys te m a tic re vie w o f Fu ku s h im a e ve n t 11

De s ig n e d fo r S ite S p e c ific Na tu ra l Eve n ts

• Ea rth q u a ke s

• Ts u n a m is

• Hu rric a n e s

• Flo o d s

• To rn a d o e s 12

Th e NRC Re q u ire s De fe n s e -In -De p th

• Re d u n d a n t a n d d ive rs e s a fe ty s ys te m s

• Mu ltip le p h ys ic a l b a rrie rs to c o n ta in ra d io a c tive m a te ria l

• Te s tin g a n d in s p e c tio n o f s ys te m s im p o rta n t to s a fe ty

• Em e rg e n c y p la n n in g 13

NRC In d e p e n d e n t S a fe ty In s p e c tio n s Re a c to r Ove rs ig h t P ro g ra m

• NRC in s p e c to rs h a ve u n fe tte re d a c c e s s to a ll p la n t a c tivitie s re la te d to n u c le a r s a fe ty a n d s e c u rity

• At le a s t two fu ll-tim e NRC re s id e n t in s p e c to rs a t e a c h n u c le a r p la n t

• NRC s p e c ia lis ts c o n d u c t a d d itio n a l in s p e c tio n s a t e a c h n u c le a r p la n t 14

NRC Re q u ire s S a fe ty Im p ro ve m e n ts NRC a s s e s s e s n e w s a fe ty in fo rm a tio n , d e ve lo p s le s s o n s le a rn e d , a n d re q u ire s s a fe ty e n h a n c e m e n ts :

• NRC o p e ra tin g e xp e rie n c e p ro g ra m

• Ru le m a kin g (S ta tio n Bla c ko u t)

• P o s t TMI Ac tio n s

• P o s t 9/11 Ord e rs

• Generic Safety Issues 15

NRC Re s p o n s e to Eve n ts in J a p a n

• NRC re s p o n s e & a s s is ta n c e to J a p a n e s e g o ve rn m e n t

• NRC c o n d u c tin g a m e th o d ic a l a n d s ys te m a tic re vie w

• Ne a r-te rm a c tio n s (~90 d a ys )

- c o n d u c te d a d d itio n a l in s p e c tio n s

- id e n tifyin g n e a r te rm o p e ra tio n a l is s u e s

• Lo n g e r-te rm a c tio n s 16

NRC Ne a r-Te rm Re vie w

• Eva lu a te Fu ku s h im a Da iic h i Eve n ts

• Do m e s tic Op e ra tin g Re a c to rs a n d S p e n t Fu e l P o o ls

• S ta ff b rie fe d th e Co m m is s io n in a p u b lic m e e tin g o n Ma y 12; s e c o n d b rie fin g o n J u n e 16

• Fin a l re c o m m e n d a tio n s in p u b lic m e e tin g J u ly 19 17

NRC Lo n g -Te rm Re vie w

• S e q u e n c e o f e ve n ts a n d th e s ta tu s o f e q u ip m e n t d u rin g th e e ve n t

• Eva lu a te a ll te c h n ic a l a n d p o lic y is s u e s

• Eva lu a te p o te n tia l in te ra g e n c y is s u e s

• Ap p lic a b ility o f le s s o n s le a rn e d to n o n -

o p e ra tin g re a c to r a n d n o n -re a c to r fa c ilitie s

• Re p o rt to th e Co m m is s io n with in 6 m o n th s fro m th e s ta rt o f th e e va lu a tio n 18

NRC Ac tio n s to Da te

• In fo rm a tio n No tic e 2011-05, To h o ku -

Ta ih e iyo u -Oki Ea rth q u a ke Effe c ts o n J a p a n e s e Nu c le a r P o we r P la n ts

• Em e rg e n t NRC In s p e c tio n s in Re s p o n s e to Fu ku s h im a Eve n ts

• NRC Bu lle tin 2011-01 Mitig a tin g S tra te g ie s 19

S u m m a ry

• S a fe ty o f c u rre n t fa c ilitie s re m a in s to p p rio rity

• Th e NRC will c o n tin u e to p e rfo rm a s ys te m a tic a n d m e th o d ic a l re vie w o f th e Fu ku s h im a e ve n t

• Th e NRC will ta ke a c tio n b a s e d o n re s u lts o f th e re vie w to e n s u re th e c o n tin u e d s a fe ty o f US c o m m e rc ia l n u c le a r p o we r p la n ts 20

Me e tin g Gro u n d Ru le s

1. P le a s e b e re s p e c tfu l to th e s p e a ke r - o n ly o n e s p e a ke r a t a tim e

2. S e e NRC s ta ff if yo u h a ve p ro c e d u ra l q u e s tio n s /c o n c e rn s o r s till wa n t to s ig n u p .

3. NRC s ta ff m e m b e rs will b e a va ila b le a fte r th e m e e tin g to ta lk to th o s e in te re s te d 21

Qu e s tio n s 22

Co n ta c tin g th e NRC

• Re p o rt a s a fe ty c o n c e rn

• 1-800-695-7403

• a lle g a tio n @n rc .g o v

• Ge n e ra l q u e s tio n s

• www.n rc .g o v

• Re g io n I P u b lic Affa irs

• Dia n e S c re n c i, 610-337-5330 o r d ia n e .s c re n c i@n rc .g o v

• Ne il S h e e h a n , 610-337-5331 o r n e il.s h e e h a n @n rc .g o v 23