ML17265A511

Requests Relief Per 10CFR50.55a(a)(3)(ii) from Certain Requirements of Section Xi of ASME Bp&V Code for ISI Program.Relief Requests 37,38 & 39 Encl

ML17265A511
Person / Time
Site:	Ginna
Issue date:	01/11/1999
From:	MECREDY R C ROCHESTER GAS & ELECTRIC CORP.
To:	VISSING G S NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9901200396
Download: ML17265A511 (14)

Text

~4%'i,CATEGORY1REGULAjYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)~CCESSIONNBR:9901200396DOC.DATE:99/01/11NOTARIZED:NOFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGasSElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONVISSING,G.S.DOCKET05000244

SUBJECT:

Requestsreliefper10CFR50.55a(a)(3)(ii)fromcertainrequirementsofSectionXXofASMEBPEVCodeforISIProgram.Reliefrequests37,38&39encl.DISTRXBUTIONCODE:A047DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:Inservice/Testing/RelieffromASMECode-GL-89-04NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244ERECIPIENTIDCODE/NAMEPD1-1LAVISSING,G.INTERNAL:AEOD/SPD/RABNRR/DE/ECGBNUDOCS-ABSTRACTRES/DET/EIBEXTERNAL:LITCOANDERSONNRCPDRCOPIESLTTRENCL1111111111111111RECIPIENTXDCODE/NAMEPD1-1PDILECENTER0NRRDEMEBOGC/HDS3RES/DET/EMMEBNOACCOPIESLTTRENCL11111110111100,NOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTETHTOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRIBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083TOTALNUMBEROFCOPIESREQUIRED:LTTR14ENCL13 ANDROCHESTERGASANDElECTRICCORPORATION~89EASTAVENUE,ROCHESTER,NYIdbf90001AREACOOE71654'6-2700ROBERTC.MECREDYVicePresidentNucteorOperotioosZanuary11,1999U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:GuyS.VissingProjectDirectorateI-1Washington,D.C.20555

Subject:

InserviceInspectionProgramASMESectionXIRequiredExaminationsforFirst10-YearIntervalforContainment(IWEandIWL)RequestsforReliefNo.37,38,39R.E.GinnaNuclearPowerPlantDocketNo.50/244

References:

EPRI"ContainmentInspectionProgramGuide"GC-110698,September1998,andselectedReliefRequests:(1)Davis-BesseReliefRequestE-1(2)Davis-BesseReliefRequestE-6(3)Davis-BesseReliefRequestE-7

DearMr.Vissing:

IntheFederalRegister,datedAugust8,1996(61FR41303),theNRCamendeditsregulationstoincorporatebyreferencethe1992EditionandAddendaofSubsectionsIWEandIWLofSectionXIoftheASMECode.SubsectionsIWEandIWLgivetherequirementsforinserviceinspection(ISI)ofClassMC(metalliccontainment)andClassCC(concretecontainment).TheserequirementsarenowapplicableforR.E.GinnaNuclearPowerPlant.Thepurposeofthisletteristorequestreliefpursuantto10CFR50.55a(a)(3)(ii)fromcertainrequirementsofSectionXIoftheAmericanSocietyofMechanicalEngineers(ASME)BoilerandPressureVesselCode.RochesterGasandElectricisaparticipantintheElectricPowerResearchInstitute(EPRI)projectforthepreparationofaGenericIWE/IWLProgramandIndustryGuide.ThisprogramwasdescribedtotheNRCinameetingonOctober23,1997,betweentheNRC,EPRI,andNEI,andseveralutilities.AsaresultfromthesemeetingsaswellasthepublicationoftheEPRI"ContainmentInspectionProgramGuide"GC-110698,datedSeptember1998,RochesterGasandElectricissubmittingthree(3)reliefrequests.Relief.,".3.'3b9'ttoi2003969'staiiiPOaADOCKOSa002O48PDR

~~e~RequestsNumber37through39arebasedonthegenericreliefrequestscontainedintheEPRI"ContainmentInspectionProgramGuide".NRCapprovalofthesereliefrequestsisdocumentedinthereferencedsubmittal.MoredetailedcommentsareprovidedinAttachments1,2and3tothisletter.ReliefRequestNumber37requestsrelieffromSectionXIoftheASMECode,1992Edition,1992Addenda,CodeItemsE5.10andE5.20,whichrequireavisualexaminationofmetalcontainmentsealsandgaskets.Examinationofmostsealsandgasketsrequirethejointstobedisassembled.Containmentsealandgasketjointswillbeprovenadequatethroughtheperformanceof10CFRAppendixJtesting.2.ReliefRequestNumber38requestsrelieffromSectionXIoftheASMECode,1992Edition,1992Addenda,SubarticlesIWE-2420(b)andIWE-2420(c),whichrequirerepairedareasbeexaminedduringthenextinspectionperiod.Repairsrestorethecomponenttoanacceptableconditionforcontinuedservice.Successiveexaminationsshouldnotberequiredforrepairedareas.3~ReliefRequestNumber39requestsrelieffromSectionXIoftheASMECode,1992Edition,1992Addenda,CodeItemE8.20,whichrequiresabolttorqueortensiontestforboltedconnectionsthathavenotbeendisassembledandreassembledduringtheinspectioninterval.Theleaktightnessofboltedconnectionswillbeverifiedthroughtheperformanceof10CFR50AppendixJtesting.ReliefRequests,justification,andtheproposedalternativesareincludedintheattachmentstothisletter.ThesereliefrequestswillbeincludedintheInserviceInspectionProgramforR.E.GinnaNuclearPowerPlantfortheThirdIntervalProgram(whichendsDecember31,1999)andtheFourthIntervalProgram(whichbeginsJanuary1,2000).NRCapprovalofthesereliefrequestsisdesiredbeforetheendofJune,1999,toensuretheseprogramsareincompliancewithNRCrequirementsbeforetheendoftheThirdInterval.Vertrulyyours,RobertC.MeedAttachments-3

~~'c:Mr.GuyS.Vissing(MailStop14B2)ProjectDirectorateI-1DivisionofReactorProjects-I/IIOfficeofNuclearReactorRegulationU.S.NuclearRegulatoryCommissionWashington,D.C.20555RegionalAdministrator,RegionIU.S.NuclearRegulatoryCommission475AllendaleRoadKingofPrussia,PA19406U.S.NRCGinnaSeniorResidentInspector ATTACHMENT1RochesterGasandElectricCorporationGinnaStationDocketNo.50/244First10-YearIntervalforContainmentInspectionProgramRequestforReliefNo.37ContainmentInspectionSealsandGasketsSystem/Component(s)forWhichReliefisRequested:SealsandgasketsofClassMCpressureretainingcomponentsandmetalliclinersofClassCCcomponents,ExaminationCategoryE-D,ItemNumbersE5.10andE5.20ofIWE-2500,TableIWE-2500-1,ASMESectionXI,1992Edition,1992Addenda.Severalhundredsealsandgasketsareaffectedbythisreliefrequest.II.CodeRequirement:IWE-2500,TableIWE-2500-1requiressealsandgasketsonairlocks,hatches,andotherdevicestobevisuallyexamined,VT-3,onceeachintervaltoassurecontainmentleak-tightintegrity.III.CodeRequirementfromWhichReliefisRequested:ReliefisrequestedfromperformingtheCode-requiredvisualexamination,VT-3,ontheaboveidentifiedmetalcontainmentsealsandgaskets.IV.BasisforRelief:10CFR50.55awasamendedintheFederalRegister(61FR41303)torequiretheuse.ofthe1992Edition,1992Addenda,ofSectionXIwhenperformingcontainmentexaminations.Thepenetrationsdiscussedbelowcontainsealsandgaskets.ElectricalPenetrationsElectricalpenetrationsuseaheaderplateattachedtoacontainmentpenetrationnozzleflangewithredundant0-ringsbetweentheheaderplateandflangeface.RequestforReliefNo.37AttachmentsPage1of10 Modulesthroughwhichelectricalconductorspassareinstalledintheheaderplate.Onetype,manufacturedbyAmphenol,usessealsandgasketstoassureleaktightintegrity.Asecondtype,manufacturedbyConax,usesasetofcompressionfittings.ReplacementmodulesfortheAmphenolpenetrationsuseacombinationof0-ringsandcompressionfittings.Eachpenetrationispressurizedwithdrynitrogentomaintainandmonitorintegrityandtopreventtheintrusionofmoistureintothepenetration.Thesesealsandgasketscannotbeinspectedwithoutdisassemblyofthepenetrationtogainaccesstothesealsandgaskets.B.ContainmentPersonnelandEquipmentHatchesThePersonnelandEquipmentHatchesutilizeaninnerandouterdoorwithgasketsurfacestoensurealeaktightintegrity.Thesehatchesalsocontainothergasketsandsealssuchasthehandwheelshaftseals,electricalpenetrations,blankflanges,andequalizingpressureconnectionswhichrequiredisassemblytogainaccesstothegasketsandseals.Sealandgasketjointsreceivea10CFR50AppendixJtest.Asnotedin10CFR50AppendixJ,thepurposeofTypeBtestsistomeasureleakageofcontainmentorpenetrationswhosedesignincorporatesresilientseals,gaskets,sealantcompounds,andelectricalpenetrationsfittedwithflexiblemetalsealassemblies.Examinationofsealsandgasketsrequirethejoints,whichareprovenadequatethroughAppendixJtesting,bedisassembled.Forelectricalpenetrations,thiswouldinvolveapre-maintenanceAppendixJtest,de-terminationofcablesatelectricalpenetrationsifenoughcableslackisnotavailable,disassemblyofthejoint,removalandexaminationofthesealsandgaskets,reassemblyofthejoint,re-terminationofthecablesifnecessary,postmaintenancetestingofthecables,andapostmaintenanceAppendixJtestofthepenetration.TheworkrequiredfortheContainmentHatcheswouldbesimilarexceptforthede-termination,re-termination,andtestingofcables.Thisimposestheriskthatequipmentcouldbedamaged.The1992Edition,1993Addenda,ofSectionXIrecognizesthatdisassemblyofjointstoperformtheseexaminationsisnotwarranted.Note1inExaminationCategoryE-Dwasmodifiedinthe1995,EditionofSectionXItostatethatsealorgasketconnectionsneednotbedisassembledsolelyforperformanceofexaminations.However,withoutdisassembly,mostofthesurfaceofthesealsandgasketswouldbeinaccessible.RequestforReliefNo.37AttachmentsPage2of10 Forthosepenetrationsthatareroutinelydisassembled,aTypeBtestisrequireduponfinalassemblyandpriortostart-up.SincetheTypeBtestwillassuretheleaktightintegrityofprimarycontainment,theperformanceofthevisualexaminationwouldnotprovideanincreaseinthelevelofsafetyorquality.SealsandgasketsarenotpartofthecontainmentpressureboundaryundercurrentCoderules(NE-1220(b)).Theairlocksandhatchescontainingthesematerialsaretestedinaccordancewith10CFR50,AppendixJ.IfincreasedleakageisidentifiedduringtheseAppendixJtests,thecauseofleakagewouldbeinvestigated.Ifincreasedleakagewereduetodegradationofthesealorgasketmaterial,correctivemeasureswouldbeappliedandthecomponentretested.RepairorreplacementofsealsandgasketsisnotsubjecttoCode(1992Edition,1992Addenda)rulesinaccordancewithParagraphIWA-4111(b)(5)ofASMESectionXI.ThevisualexaminationofsealsandgasketsinaccordancewithIWE-2500,TableIWE-2500-1isaburdenwithoutanycompensatingincreaseinthelevelofsafetyorquality.Reliefisrequestedinaccordancewith10CFR50.55a(a)(3)(ii).Compliancewiththeoriginalrequirementsofthissectionwouldresultinhardshiporunusualdifficultywithoutacompensatingincreaseinthelevelofqualityandsafety.,Testingthesealandgasketjointsinaccordancewith10CFR50,AppendixJwillprovideadequateassuranceoftheleak-'tightintegrityofthesealsandgaskets.V.AlternateExaminations:Theleaktestingofsealandgasketjointswillbeinaccordancewith10CFR50,AppendixJ.Noadditionalalternativeexaminationstothevisualexamination,VT-3,ofthesealsandgasketswillbeperformed.VI.JustificationfortheGrantingofRelief:ThisReliefRequestissimilartoReliefRequestE-1submittedbyDavis-BesseasoneoftheEPRI"ContainmentInspectionProgramGuide"PilotPlantReliefRequests.ThisReliefRequestwillminimizeGinnaoperatingandmaintenancecostwithoutdecreasingthelevelofqualityandsafety.RequestforReliefNo.37AttachmentsPage3of10 VII.ImplementationSchedule:ReliefisrequestedforthefirstinspectionintervalfortheIWEContainmentInspectionProgram(1996-2008).NotethatthisintervaloverlapstheThirdandFourth10-YearIntervalinspectionsoftheGinnaInserviceInspectionProgram.RequestforReliefNo.37AttachmentsPage4of10 ATTACHMENT2RochesterGasandElectricCorporationGinnaStationDocketNo.50/244First10-YearIntervalforContainmentInspectionProgramRequestforReliefNo.38ContainmentInspectionSuccessiveExaminationsafterRepairSystem/Component(s)forWhichReliefisRequested:AllClassMC,ParagraphsIWE-2420(b)andIWE-2420(c)successiveexaminationrequirementsforcomponentsfoundacceptableforcontinuedservice.II.CodeRequirement:ParagraphsIWE-2420(b)andIWE-2420(c)ofthe1992Edition,1992AddendaofASMESectionXIrequiresthatwhencomponentexaminationresultsrequireevaluationofflaws,evaluationofareasofdegradation,orrepairsinaccordancewithArticleIWE-3000,andthecomponentisfoundtobeacceptableforcontinuedservice,theareascontainingsuchflaws,degradation,orrepairsshallbereexaminedduringthenextinspectionperiodlistedinthescheduleoftheinspectionprogramofParagraphIWE-2411orParagraphIWE-2412,inaccordancewithTableIWE-2500-1,ExaminationCategoryE-C.III.CodeRequirementfromWhichReliefisRequested:ReliefisrequestedfromtherequirementsofParagraphsIWE-2420(b)andIWE-2420(c)toperformsuccessiveexaminationofrepairs.IV.BasisforRelief:10CFR50.55awasamendedintheFederalRegister(61FR41303)torequiretheuseofthe1992Edition,1992Addenda,ofSectionXIwhenperformingcontainmentexaminations.ThepurposeofarepairistorestorethecomponenttoanacceptableconditionforcontinuedserviceinaccordancewiththeacceptancestandardsofArticleIWE-3000.ParagraphIWA-4150requirestheownertoconductanevaluationofthesuitabilityoftherepairincludingconsiderationofthecauseoffailure.RequestforReliefNo.38AttachmentsPage5of10 Iftherepairhasrestoredthecomponenttoanacceptablecondition,itisoverlyconservativetorequiresuccessiveexaminations.OtherparagraphsoftheASMECoderecognizethisrequirementas'overlyconservative.Iftherepairwasnotsuitable,thentherepairdoesnotmeetcoderequirementsandthecomponentisnotacceptableforcontinuedservice.NeitherParagraphIWB-2420(b),ParagraphIWC-2420(b),norParagraphIWD-2420(b)requiresarepairtobesubjecttosuccessiveexaminationrequirements.Furthermore,iftherepairareaissubjecttoaccelerateddegradation,itwouldstillrequireaugmentedexaminationinaccordancewithTableIWE-2500-1,ExaminationCategoryE-C.ThesuccessiveexaminationofrepairsinaccordancewithParagraphsIWE-2420(b)andIWE-2420(c)constitutesaburdenwithoutacompensatingincreaseinqualityorsafety.Intheirresolutiontopubliccommentg3.3,theNRCstated:"ThepurposeofIWE-2420(b)istomanagecomponentsfoundtobeacceptableforcontinuedservice(meaningnorepairorreplacementatthistime)asanExaminationCategoryE-Ccomponent...Ifthecomponenthadbeenrepairedorreplaced,thenthemorefrequentexaminationwouldnotbe'needed."Reliefisrequestedinaccordancewith10CFR50.55a(a)(3)(ii).Compliancewiththeoriginalrequirementsofthissectionwouldresultinhardshiporunusualdifficultywithoutacompensatingincreaseinthelevelofqualityandsafety.Therequirementtoperformsuccessiveexaminationsfollowingrepairshasbeenremovedinthe1997AddendaofASMESectionXI.ThisaddendahasbeenapprovedbytheASMEMainCommitteeandhasbeenpublished.V.AlternateExaminations:SuccessiveexaminationsinaccordancewithParagraphsIWE-2420(b)andIWE-2420(c)arenotrequiredfor'epairsmadeinaccordancewithArticleIWA-4000.VI.JustificationfortheGrantingofRelief:ThisReliefRequestissimilartoReliefRequestE-6submittedbyDavis-BesseasoneoftheEPRI"ContainmentInspectionProgramGuide"PilotPlantReliefRequests.ThisReliefRequestwillminimizeGinnaoperatingandmaintenancecostwithoutdecreasingthelevelofqualityandsafety.RequestforReliefNo.38AttachmentsPage6of10 VII.ImplementationSchedule:ReliefisrequestedforthefirstinspectionintervalfortheIWEContainmentInspectionProgram(1996-2008).NotethatthisintervaloverlapstheThirdandFourth10-YearIntervalinspectionsoftheGinnaInserviceInspectionProgram.RequestforReliefNo.38AttachmentsPage7of10 ATTACHMENT3RochesterGasandElectricCorporationGinnaStationDocketNo.50/244First.10-YearIntervalforContainmentInspectionProgramRequestforReliefNo.39ContainmentInspectionBoltTorqueorTensionTestingI.System/Component(s)forWhichReliefisRequested:ClassMCpressureretainingbolting.II.CodeRequirement:ASMESectionXI,1992Editionwiththe1992Addenda,TableIWE-2500-1,ExaminationCategoryE-G,PressureRetainingBolting,ItemE8.20.Bolttorqueortensiontestingisrequiredonboltedconnectionsthathavenotbeendisassembledandreassembledduringtheinspectioninterval.III.CodeRequirementfromWhichReliefisRequested:ReliefisrequestedfromASMESectionXI1992Editionwiththe1992AddendaTableIWE-2500-1ExaminationCategoryE-G,PressureRetainingBolting,ItemE8.20.Bolttorqueortensiontestingisrequiredonboltedconnectionsthathavenotbeendisassembledandreassembledduringtheinspectioninterval.IV.BasisforRelief:10CFR50.55awasamendedintheFederalRegister(61FR41303)torequiretheuseofthe1992Edition,1992Addenda,ofSectionXIwhenperformingcontainmentexaminations.Bolttorqueortensiontestingisrequiredonboltedconnectionsthathavenotbeendisassembledandreassembledduringtheinspectioninterval.Determinationofthetorqueortensionvaluewouldrequirethattheboltingbeun-torquedandthenre-torquedorre-tensioned.TheperformanceoftheTypeBtestitselfprovesthatthebolttorqueortensionremainsadequatetoprovidealeakratethatiswithinacceptablelimits.Thetorqueortensionvalueofboltingonlybecomesanissueiftheleakrateisexcessive.Onceaboltistorquedor.tensioned,itisnotsubjecttodynamicloadingthatcouldcauseittoexperiencesignificantchange.RequestforReliefNo.39AttachmentsPage8of10 VerificationoftorqueortensionvaluesonboltedjointsthatareprovenadequatethroughAppendixJtestingandvisualinspectionisadequatetodemonstratethatdesignfunctionismet.TorqueortensiontestingisnotrequiredonanyotherASMESectionXI,Class1,2,or3boltedconnectionsortheirsupportsaspartoftheinserviceinspectionprogram.Also,allpenetrationsatR.E.GinnaNuclearPowerPlantareseatedwithpressure(notunseated).Reliefisrequestedinaccordancewith10CFR50.55a(a)(3)(ii).Compliancewiththeoriginalrequirementsofthissectionwouldresultinhardshiporunusualdifficultywithoutacompensatingincreaseinthelevelofqualityandsafety.V.AlternateExaminations:ThefollowingexaminationsandtestsrequiredbySubsectionIWEensurethestructuralintegrityandtheleak-tightnessofClassMCpressureretainingbolting,and,therefore,noadditionalalternativeexaminationsareproposed:(1)ExposedsurfacesofboltedconnectionsshallbevisuallyexaminedinaccordancewithrequirementsofTableIWE-2500-1,ExaminationCategoryE-G,PressureRetainingBolting,ItemNo.E8.10,and(2)BoltedconnectionsshallmeetthepressuretestrequirementsofTableIWE-2500-1,ExaminationCategoryE-P,AllPressureRetainingComponents,ItemE9.40,and(3)Ageneralvisualexaminationoftheentirecontainmentonceeachinspectionperiodshallbeconductedinaccordancewith10CFR50.55a(b)(2)(x)(E).VI.JustificationfortheGrantingofRelief:ThisReliefRequestissimilartoReliefRequestE-7submittedbyDavis-BesseasoneoftheEPRI"ContainmentInspectionProgramGuide"PilotPlantReliefRequests.ThisReliefRequestwillminimizeGinnaoperatingandmaintenancecostwithoutdecreasingthelevelofqualityandsafety.RequestforReliefNo.39AttachmentsPage9of10 VII.ImplementationSchedule:ReliefisrequestedforthefirstinspectionintervalfortheIWEContainmentInspectionProgram(1996-2008).NotethatthisintervaloverlapstheThirdandFourth10-YearIntervalinspectionsoftheGinnaInserviceInspectionProgram.RequestforReliefNo.39AttachmentsPage10of10