ML24102A068

IST (z)(2) Hardship RR V-1 RCS Cold Leg, Lh Safety Injection Check Valves

ML24102A068
Person / Time
Site:	Surry
Issue date:	04/10/2024
From:	John Klos Plant Licensing Branch II
To:	Geoffrey Miller Dominion Energy Virginia, Virginia Electric & Power Co (VEPCO)
Klos, J
References
Download: ML24102A068 (2)

Text

John Klos

From: John Klos Sent: Wednesday, April 10, 2024 9:40 AM To: gary.d.miller@dominionenergy.com Cc: John Klos

Subject:

Surry IST (z)(2) hardship RR V-1 RCS Cold Leg, LH Safety Injection Check Valves, RAI issuance due to NRC May 10 2024

Gary,

The RAIs below are now issued officially, and the response due date is May 10, 2024.

=

Background===

Byle erdatedOctober12,2023(AgencywideDocumentsAccessandManagementSystemAccessionNo.

ML23285A092),VirginiaElectricandPowerCompany(DominionEnergyVirginia)submi edAlterna veRequestV1for authoriza onbytheU.S.NuclearRegulatoryCommission(NRC),pursuanttoTitle10oftheCode of Federal Regula ons (10CFR)50.55a(z)(2),tospeci"crequirementsoftheAmericanSocietyofMechanicalEngineers(ASME)Opera on and Maintenance of Nuclear Power Plants,Division1,OMCode:Sec onIST(OMCode)associatedwithinservicetes ng(IST) forcertaincheckvalvesatSurryPowerSta on(SPS),Units1and2.

RegulatoryRequirements TheNRCregula onsin10CFR50.55a(f)(4),Inservice tes ng standards requirement for opera ng plants, state,inpart, that throughouttheservicelifeofaboilingorpressurizedwatercoolednuclearpowerfacility,pumpsandvalvesthat arewithinthescopeoftheAmericanSocietyofMechanicalEngineers(ASME)Opera on and Maintenance of Nuclear Power Plants,Division1,OMCode:Sec onIST(OMCode)mustmeettheinservicetestrequirements(exceptdesign andaccessprovisions)setforthintheASMEOMCodeandaddendathatbecomeeec vesubsequenttoedi onsand addendaspeci"edinparagraphs10CFR50.55a(f)(2)and(3)andthatareincorporatedbyreferenceinparagraph10CFR 50.55a(a)(1)(iv),totheextentprac calwithinthelimita onsofdesign,geometry,andmaterialsofconstruc onofthe components.

TheNRCregula onsin10CFR50.55a(z),Alterna ves to codes and standards requirements,states:

Alterna vestotherequirementsofparagraphs(b)through(h)ofthissec onorpor onsthereofmaybeusedwhen authorizedbytheDirector,OceofNuclearReactorRegula on.Aproposedalterna vemustbesubmi edand authorizedpriortoimplementa on.Theapplicantorlicenseemustdemonstratethat:

(1)Acceptable level of quality and safety. Theproposedalterna vewouldprovideanacceptablelevelofquality andsafety;or

(2)Hardship without a compensa ng increase in quality and safety. Compliancewiththespeci"edrequirements ofthissec onwouldresultinhardshiporunusualdicultywithoutacompensa ngincreaseinthelevelof qualityandsafety.

RequestsforAddi onalInforma on(RAIs)

EMIBRAI1:

Sec on6.AofAlterna veRequestV1referstovendorguidancetorebuild6Velanswingcheckvalves.A achment2, EngineeringAssessmentofMechanicalAgita onProcessforSixInchVelanPressureIsola onValves,tothelicensees submi alisscopedfor6VelanPressureIsola onValves.However,Sec on1ofAlterna veRequestV1doesnot

1 specifythetypeofcheckvalvewithinthescopeofthisrequest.Thelicenseeisrequestedtocon"rmthatthescopeof thecomponentsinthisrequestareonly6Velanswingcheckvalves,orprovideaddi onaldetailsregardingthe componentswithinthescopeofthisrequest.

EMIBRAI2:

Thecitedprecedent(SequoyahUnit1and2,ML22263A375)forAlterna veRequestV1includesaddi onalcontrolsfor mechanicalagita onofcheckvalvesthatdonotappearpresentinthisrequest.Forexample,thecontrolsinthe precedentrequirethattheimpactsurfaceofthetoolshouldberela velylarge(greaterthan1/2diameterispreferred) andapproximately"atorslightlyrounded.Ifavailable,arubbercoatedtoolmaybeused.Thosecontrolsalsospecify thatthetoolwillnotimpactthebodywithanedgeorsharppoint.Further,thecontrolsspecifythatagita onshouldbe appliedincrementallystar ngwithminimalforceandmaybeappliedtodierentloca onsonthebody.Inorderto preventdamagetothevalveorinjurytopersonnel,thelicenseeisrequestedtoprovideaddi onalguidancetothis extentwithinAlterna veRequestV1andallguidanceshouldbelistedinsequenceforbe erimplementa on.

EMIBRAI3:

Sec on6.AofAlterna veRequestV1isen tledReviewofMaintenanceHistoryforValvesinSec on1,butthe discussionfocusesonleakagetes ngresultsforthesubjectcheckvalves.Thelicenseeisrequestedtoprovide informa onregardingthemaintenancehistoryofthecheckvalvesinaddi ontotheleakagetes ngresults,tosupport theasser onthatthesecheckvalveshaveahistoryofgoodperformance.Forexample,thecitedprecedentdiscussed visualinspec onresultsandfreedomofmovementchecksoftheapplicablecheckvalves.Inaddi on,thelicensee shoulddiscussanysigni"cantmaintenanceac vi esforthecheckvalveswithinthescopeofAlterna veRequestV1, suchaslessonslearneddescribedinNRCInspec onReport05000281/2020040datedDecember30,2020 (ML20365A007).

Thanks in advance,

John Klos DORL Mcguire, Surry Licensing Project Manager U.S. NRC, Office of Nuclear Reactor Regulation (NRR),

Division of Operating Reactor Licensing (DORL),

NRC/NRR/DORL/LPL2-1, MS O8B01, O8B03 Washington, DC 20555-0001 301.415.5136, John.Klos@NRC.gov

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