Text

NRR E-mail Capture - Final RAI for Summer LAR - TS 3.6.4
	ML20342A182
Person / Time
Site:	Summer
Issue date:	12/07/2020
From:	Vaughn Thomas; NRC/NRR/DORL/LPL2-1
To:	Gao Y; South Carolina Electric & Gas Co
References
	Download: ML20342A182 (5)
	v • d • e

From:

Thomas, Vaughn Sent:

Monday, December 7, 2020 10:00 AM To:

Yan.Gao@dominionenergy.com Cc:

Croon, Gregory

Subject:

Final RAI for Summer LAR - TS 3.6.4 Attachments:

ML20259A347 (2).pdf

Yan, By letter dated April 30, 2020 (Agencywide Documents Access and Management System Accession No. ML20121A185), Dominion Energy South Carolina, Inc., (Dominion) submitted a license amendment request to modify Technical Specifications related to the containment isolation valves for Virgil C. Summer Nuclear Station (VCSNS), Unit No. 1. Specifically, the licensee proposed to revise the action statements associated with Technical Specification (TS)

Limiting Condition for Operation (LCO) 3.6.4, "Containment Isolation Valves," to replace the term valve with the term barrier to encompass all components providing the containment isolation function and specify that actions to address an inoperable containment isolation valve apply to the affected penetration flow path only rather than all flow paths associated with the penetration.

The NRC staff has reviewed the application and, based upon this review, determined that additional information is needed to complete our review. Please provide a response on the docket within 30 days of this correspondence.

Request for Additional Information (RAI-01)

Should TS 3.6.4 action statement ensure at least one OPERABLE isolation barrier would be present in each penetration flow path affected by an inoperable CIV.

Thanks Vaughn Thomas, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Vaughn.Thomas@nrc.gov 301-415-5897

Hearing Identifier:

NRR_DRMA Email Number:

918 Mail Envelope Properties (BLAPR09MB69001AD9CAB8B4CBD07FB47EF4CE0)

Subject:

Final RAI for Summer LAR - TS 3.6.4 Sent Date:

12/7/2020 9:59:35 AM Received Date:

12/7/2020 9:59:35 AM From:

Thomas, Vaughn Created By:

Vaughn.Thomas@nrc.gov Recipients:

"Croon, Gregory" <Gregory.Croon@nrc.gov>

Tracking Status: None "Yan.Gao@dominionenergy.com" <Yan.Gao@dominionenergy.com>

Tracking Status: None Post Office:

BLAPR09MB6900.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 1490 12/7/2020 9:59:35 AM ML20259A347 (2).pdf 91708 Options Priority:

Normal Return Notification:

No Reply Requested:

No Sensitivity:

Normal Expiration Date:

2)),&(2)18&/($55($&7255(*8/$7,21

&217$,10(17$1'3/$176<67(06%5$1&+

5(48(67)25$,7,21$/,1)250$7,21

/,&(16($0(1'0(175(48(6702',)<,1*7+(7(&+1,&$/63(&,),&$7,216)25

&217$,10(17,62/$7,219$/9(6

9,5*,/&6800(518&/($567$7,2181,71R

'20,1,21(1(5*<6287+&$52/,1$,1&

'2&.(712

%DFNJURXQG

%\\OHWWHUGDWHG$SULO$JHQF\\ZLGH'RFXPHQWV$FFHVVDQG0DQDJHPHQW6\\VWHP

$FFHVVLRQ1R0/$'RPLQLRQ(QHUJ\\6RXWK&DUROLQD,QF'RPLQLRQVXEPLWWHGD

OLFHQVHDPHQGPHQWUHTXHVWWRPRGLI\\7HFKQLFDO6SHFLILFDWLRQVUHODWHGWRWKHFRQWDLQPHQW

LVRODWLRQYDOYHVIRU9LUJLO&6XPPHU1XFOHDU6WDWLRQ9&6168QLW1R6SHFLILFDOO\\WKH

OLFHQVHHSURSRVHGWRUHYLVHWKHDFWLRQVWDWHPHQWVDVVRFLDWHGZLWK7HFKQLFDO6SHFLILFDWLRQ76

/LPLWLQJ&RQGLWLRQIRU2SHUDWLRQ/&2&RQWDLQPHQW,VRODWLRQ9DOYHVWRUHSODFHWKH

WHUP³YDOYH'ZLWKWKHWHUP³EDUULHU'WRHQFRPSDVVDOOFRPSRQHQWVSURYLGLQJWKHFRQWDLQPHQW

LVRODWLRQIXQFWLRQDQGVSHFLI\\WKDWDFWLRQVWRDGGUHVVDQLQRSHUDEOHFRQWDLQPHQWLVRODWLRQYDOYH

DSSO\\WRWKHDIIHFWHGSHQHWUDWLRQIORZSDWKRQO\\UDWKHUWKDQDOOIORZSDWKVDVVRFLDWHGZLWKWKH

SHQHWUDWLRQ

7LWOH³(QHUJ\\'RIWKHCode of Federal Regulations&)56HFWLRQEVWDWHVLQ

SDUW³7KHWHFKQLFDOVSHFLILFDWLRQVZLOOEHGHULYHGIURPWKHDQDO\\VHVDQGHYDOXDWLRQLQFOXGHGLQ

WKHVDIHW\\DQDO\\VLVUHSRUWDQGDPHQGPHQWVWKHUHWRVXEPLWWHGSXUVXDQWWR&)5'$V

VWDWHGLQ&)5³&RQWHQWVRI$SSOLFDWLRQV7HFKQLFDO,QIRUPDWLRQ'WKH*HQHUDO'HVLJQ

&ULWHULD*'&RI$SSHQGL[$WR&)53DUWHVWDEOLVKHVPLQLPXPUHTXLUHPHQWVIRUWKH

SULQFLSDOGHVLJQFULWHULDIRUZDWHUFRROHGQXFOHDUSRZHUSODQWVVLPLODULQGHVLJQWRSODQWVIRU

ZKLFKFRQVWUXFWLRQSHUPLWVKDYHSUHYLRXVO\\EHHQLVVXHGE\\WKH&RPPLVVLRQ3XUVXDQWWR

&)5WKHIDFLOLW\\VDIHW\\DQDO\\VLVUHSRUWLQFOXGHVDGHVFULSWLRQRIWKHUHODWLRQRIWKHGHVLJQ

EDVHVWRWKHSULQFLSDOGHVLJQFULWHULD

6HFWLRQRIWKH9&6168)6$5DGGUHVVHVFRQIRUPDQFHZLWKWKH*HQHUDO'HVLJQ&ULWHULD

*'&RI$SSHQGL[$WR&)53DUWUHODWHGWRFRQWDLQPHQWLVRODWLRQDVIROORZV

7KHGHVLJQRILVRODWLRQEDUULHUVIRUOLQHVSHQHWUDWLQJWKH5HDFWRU%XLOGLQJIROORZV

WKHUHTXLUHPHQWVRI*HQHUDO'HVLJQ&ULWHULDWKURXJKRI&)5

$SSHQGL[$

XLGDQFHIRUVWDIIUHYLHZRI76VLVFRQWDLQHGLQ185(*³6WDQGDUG5HYLHZ3ODQIRUWKH

5HYLHZRI6DIHW\\$QDO\\VLV5HSRUWVIRU1XFOHDU3RZHU3ODQWV/:5(GLWLRQ'6HFWLRQ

³7HFKQLFDO6SHFLILFDWLRQV'7KH1XFOHDU5HJXODWRU\\&RPPLVVLRQ15&VWDIIKDVSUHSDUHG

VWDQGDUGWHFKQLFDOVSHFLILFDWLRQV676IRUHDFKRIWKHOLJKW+/-ZDWHUUHDFWRUQXFOHDUVWHDPVXSSO\\

V\\VWHPVDQGDVVRFLDWHGEDODQFHRISODQWHTXLSPHQWV\\VWHPV7KHJXLGDQFHVSHFLILHVWKDWWKH

VWDIIUHYLHZZKHWKHUFRQWHQWDQGIRUPDWRISURSRVHG76DUHFRQVLVWHQWZLWKWKHDSSOLFDEOH676

KHUH76SURYLVLRQVGHSDUWIURPWKHUHIHUHQFH76VWKHVWDIIGHWHUPLQHVZKHWKHUSURSRVHG

GLIIHUHQFHVDUHMXVWLILHGE\\XQLTXHQHVVLQSODQWGHVLJQRURWKHUFRQVLGHUDWLRQV7KHDSSOLFDEOH

FXUUHQW676IRU9&616DUHFRQWDLQHGLQ185(*³6WDQGDUG7HFKQLFDO6SHFLILFDWLRQV

HVWLQJKRXVH3ODQWV'5HYLVLRQ

5$,0DLQWHQDQFHRI2QH2SHUDEOH,VRODWLRQ%DUULHU

5HJXODWRU\\%DVLV

,QDFFRUGDQFHZLWK&)53DUW$SSHQGL[$*'&²3LSLQJV\\VWHPV

SHQHWUDWLQJFRQWDLQPHQW3LSLQJV\\VWHPVSHQHWUDWLQJSULPDU\\UHDFWRU

FRQWDLQPHQWVKDOOEHSURYLGHGZLWKOHDNGHWHFWLRQLVRODWLRQDQGFRQWDLQPHQW

FDSDELOLWLHVKDYLQJUHGXQGDQF\\UHOLDELOLW\\DQGSHUIRUPDQFHFDSDELOLWLHVZKLFK

UHIOHFWWKHLPSRUWDQFHWRVDIHW\\RILVRODWLQJWKHVHSLSLQJV\\VWHPV

,QDFFRUGDQFHZLWK&)5FOLPLWLQJFRQGLWLRQVIRURSHUDWLRQDUHWKH

ORZHVWIXQFWLRQDOFDSDELOLW\\RUSHUIRUPDQFHOHYHOVRIHTXLSPHQWUHTXLUHGIRUVDIH

RSHUDWLRQRIWKHIDFLOLW\\DQGWKHOLFHQVHHVKDOOVKXWGRZQWKHUHDFWRURUIROORZDQ\\

UHPHGLDODFWLRQSHUPLWWHGE\\WKHWHFKQLFDOVSHFLILFDWLRQVXQWLOWKHFRQGLWLRQFDQ

EHPHW

'LVFXVVLRQ

&RQGLWLRQ$RI676LQ185(*DSSOLHVZKHQRQHRUPRUHSHQHWUDWLRQIORZSDWKVZLWK

RQHFRQWDLQPHQWLVRODWLRQYDOYH&,9LQRSHUDEOHDQGWKH&,9SUHVVXUHERXQGDU\\LQWDFW7KH

DVVRFLDWHGUHTXLUHGDFWLRQVSHFLILHVLVRODWLRQRIWKHDIIHFWHGSHQHWUDWLRQIORZSDWK

,Q6HFWLRQ³7HFKQLFDO(YDOXDWLRQ'RIWKH(QFORVXUHWRWKHOLFHQVHDPHQGPHQWUHTXHVW

'RPLQLRQVWDWHG

$FKDQJHLVEHLQJUHTXHVWHGWR76WRLQFRUSRUDWHWKHWHUPSHQHWUDWLRQIORZ

SDWKLQSODFHRISHQHWUDWLRQ7KHFXUUHQW76GRHVQRWGLIIHUHQWLDWHEHWZHHQ

SHQHWUDWLRQDQGSHQHWUDWLRQIORZSDWK,QWKHHYHQWD&,9LVLQRSHUDEOHDQG

WKHUHDUHPXOWLSOH&,9VLQWKHDIIHFWHGSHQHWUDWLRQWKHFXUUHQW76FDQEH

LQWHUSUHWHGWRUHTXLUHLVRODWLRQRIDOOYDOYHVLQWKHDIIHFWHGSHQHWUDWLRQUHJDUGOHVV

RIRSHUDELOLW\\7KHSURSRVHGFKDQJHFODULILHVWKHVWDWLRQ VGHVLUHWRRQO\\LVRODWH

WKHLQRSHUDEOHYDOYHLQWKHDIIHFWHGIORZSDWKWKDWLVQHHGHGWRPDLQWDLQ

FRQWDLQPHQWLQWHJULW\\

7KHSURSRVHG76DFWLRQZLWKRQHRUPRUHFRQWDLQPHQWLVRODWLRQYDOYHVLQRSHUDEOH

LQFOXGHVWKHSURYLVLRQWR³PDLQWDLQDWOHDVWRQHLVRODWLRQEDUULHU23(5$%/(LQWKHDIIHFWHG

SHQHWUDWLRQV<<'7KHVWDIILQWHUSUHWVWKHLQWHQWRIWKLVSURYLVLRQDVHQVXULQJWKDWQRPRUHWKDQ

RQH&,9LVLQRSHUDEOHLQDQDIIHFWHGSHQHWUDWLRQIORZSDWK+RZHYHUWKHSURSRVDOGRHVQRW

QHFHVVDULO\\OLPLWWKH23(5$%/(LVRODWLRQEDUULHUWRWKHDIIHFWHGIORZSDWKEHFDXVHWKHSKUDVH

³DIIHFWHGSHQHWUDWLRQIORZSDWK'ZDVQRWXVHGLQWKHILUVWSDUWRIWKHDFWLRQVWDWHPHQWDQGDQ

DIIHFWHGSHQHWUDWLRQPD\\FRQQHFWWRPXOWLSOHEUDQFKOLQHVHDFKZLWKDVHSDUDWHLVRODWLRQEDUULHU

7KXVWKHSURSRVHGSURYLVLRQGRHVQRWFOHDUO\\SURKLELWDWHPSRUDU\\ORVVRILVRODWLRQIXQFWLRQ

FRQGLWLRQIRUDSHQHWUDWLRQFRQQHFWHGWRPXOWLSOHEUDQFKOLQHVZKLFKLVLQFRQVLVWHQWZLWKWKH

FRUUHVSRQGLQJ676&RQGLWLRQ$

5HTXHVW

3URSRVHD76DFWLRQVWDWHPHQWWKDWHQVXUHVDWOHDVWRQH23(5$%/(LVRODWLRQEDUULHU

ZRXOGEHSUHVHQWLQHDFKSHQHWUDWLRQIORZSDWKDIIHFWHGE\\DQLQRSHUDEOH&,9

ML20342A182

Text

Subject:

Subject:

Navigation menu

Search