ML17264A255
| ML17264A255 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 11/20/1995 |
| From: | MECREDY R C ROCHESTER GAS & ELECTRIC CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17264A256 | List: |
| References | |
| TAC-M92579, NUDOCS 9511300072 | |
| Download: ML17264A255 (14) | |
Text
PR.IC)R.IEY'(ACCELERATEDRIDSPROCESSIiREGULATORYINFORMATIONDISTRIBUTION,SYSTEM(RIDS)ACCESSIONNBR:9511300072DOC.DATE:95/11/20NOTARIZED:YESDOCKETIFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterG05000244AUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGas&ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)
SUBJECT:
ApplicationforamendtolicenseDPR-18,submittingchangestoTSinstrumentationrequirements6conversiontoimprovedTS.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionP',R0NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244RINTERNARECIPIENTIDCODE/NAMEPD1-1LAJOHNSON,ARR/DRCH/HICBNRR/DSSA/SRXBOGC/HDS3COPIESLTTRENCL111111111110RECIPIENTIDCODE/NAMEPD1-1PDNRR/DE/EMCBNRR/DSSA/SPLBNUDOCS-ABSTRACTCOPIESLTTRENCL11111111YEXTERNAL:NOAC11NRCPDRDCUNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUN1ENTCONTROLDESK.ROOhfPf-37(EXT.504-2083)TOELIhffVATEYOURiAMEPRO%IDISTRIBUTIONLISTSI'ORDOCI'MEN'I'SYOUDON"I'EED!TOTALNUMBEROFCOPIESREQUIRED:LTTR12ENCL11 ANnROCHESIERGASANDEIECIICCORPORATION~89EASTAVENUE,ROCHESTER,N.Y14649-0001AREACODE716546-2700ROBERTC.MECREDYVicePresidentNvctearOperationsNovember20,1995U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:AllenR.JohnsonProjectDirectorateI-3Washington,D.C.20555
Subject:
ChangestoTechnicalSpecificationInstrumentationRequirementsConversiontoImprovedTechnicalSpecifications(TACNo.M93579)RochesterGas2ElectricCorporationR.E.GinnaNuclearPowerPlantDocketNo.50-244
Reference:
(a)LetterfromR.C.Mecredy,RGB,toA.R.Johnson,NRC,
Subject:
ChangestoTechnicalSpecificationInstrumentationRequirements,ConversiontoImprovedTechnicalSpecifications,datedAugust31,1995.
DearMr.Johnson,
ByReference(a),RG8cEproposedtoimplementWCAP-10271withrespecttotheReactorTripSystem(RTS)andEngineeredSafetyFeaturesActuationSystem(ESFAS).BasedonNRCreviewofthissubmittal,severalquestionsandcommentsweregenerated.Assuch,enclosedpleasefinda"redlined"versionofthosepagesfromReference(a)whichrequirechanges.Allotherpagesofthissubmittalarenotaffected.PleasecontactMarkFlahertyat(716)724-8512ifyouhaveanyfurtherquestions.Verulyyours,RobertC.MecrdySubscribedandsworntobeforemeonthis20thdayofNovember1995.NotaryPublicMARIECrVILLENEUVENotaryPubfic,StateofNewYorkMonroeCountyCommissionExpiresOctober31,,19~tst511300072j951120'DRADOCK'05000244PDR MDF(781Attachmentsxc:U.S.NuclearRegulatoryCommissionMr.AllenR.Johnson(MailStop14B2)PWRProjectDirectorateI-1Washington,D.C.20555U.S.NuclearRegulatoryCommissionMr.CarlSchultenTechnicalSpecificationsBranch(MailStop011E22)Washington,D.C.20555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector AttachmentIChanges 13.AllowaninoperableESFASchanneltobebypassedforupto4hourstoperformsurveillancetestingoftheremainingchannelswhennobypasscapabilitywaspreviouslyallowed:a.b.C.d.e.f.SafetyInjection-HighContainmentPressureSafetyInjection-SteamLinePressureLowSafetyInjection-PressurizerPressureLowContainmentSpray-HighHighContainmentPressureAuxiliaryFeedwater-SteamGeneratorLevel-LowLowAuxiliaryFeedwater-Lossof4kVVoltageh.l.J.k.SteamLineIsolation-HighHighSteamFlowwithSafetyInjection(SI)SteamLineIsolation-HighSteamFlowwithLowT,,andSISteamLineIsolation-ContainmentPressureFeedwaterLineIsolation-SteamGeneratorLevel-HighThischangeaffectsCTSTable3.5-2,ActionStatement9whichwillnowapplytoalloftheaboveESFASfunctionswiththeexceptionofSafetyInjection-HighContainmentPressureandContainmentSpray-HighHighContainmentPressurewhichuseActionStatement11.14.RevisetheApplicabilityfortheSafetyInjection-HighContainmentPressurefunctionfrom"above350'F"to"aboveColdShutdown."Assuch,ActionStatement11nowappliestothisfunctionwithaninoperablechannel.15.RevisetheCompletionTimefrom1hourto6hoursforplacinganinoperablechannelintripfortheLossofVoltage-480VSafeguardsBusandDegradedVoltage-480VSafeguardsBusfunctionslistedinCTSTable3.5-1.Also,allowtheinoperablechanneltobebypassedforsurveillancetestingoftheremainingchannelsforupto24hours.TheallowancetoenergizetheaffectedbuswithadieselgeneratoriftheexistingCompletionTimesarenotmetwasalsodeleted.16.RevisethetestingofthefollowingESFASfunctionsfrommonthlytoquarterly:a.b.C.d.e.f.h.1.SafetyInjection-HighContainmentPressureSafetyInjection-SteamLinePressureLowSafetyInjection-PressurizerPressureLowContainmentSpray-HighHighContainmentPressureAuxiliaryFeedwater-SteamGeneratorLevel-LowLowSteamLineIsolation-HighHighSteamFlowwithSafetyInjection(SQSteamLineIsolation-HighSteamFlowwithLowT~andSISteamLineIsolation-HighContainmentPressureFeedwaterLineIsolation-HighSteamGeneratorLevel ThisaffectsCTSTable4.1-1,FunctionalUnits¹7,11,17,25,26,32,and33.17.SurveillanceswereaddedforthefollowingESFASfunctionswheresurveillancespreviouslydidnotexistintheCTSconsistentwithWCAP-10271:a.b.c.d.e.f.h.SafetyInjection-ManualInitiationContainmentSpray-ManualInitiationAuxiliaryFeedwater-ManualInitiationContainmentIsolation-ManualInitiationContainmentVentilationIsolation-ManualInitiationSteamLineIsolation-ManualInitiationFeedwaterLineIsolation-ManualInitiationAuxiliaryFeedwater-Lossof4kVVoltageThisaffectsCTSVibje.:',4I;:.,3"",".,P'gj'itfgni1::UKitgS!jjd'!Table4.1-2,FunctionalUnit¹9.18.RevisetheCompletionTimeforrestoringaninoperableAuxiliaryFeedwater-TripofBothMFWPumpschannelfrom1hourto48hours.B.JUSTIFICATIONOFCHANGESThissectionprovidesthejustificationforallchangesdescribedinSectionAabove.ThesejustificationsaremainlybasedontheconditionswhichtheNRCrequiredlicenseesto'ddressinordertoimplementWCAP-10271.TheseconditionsaredocumentedintheNRCSafetyEvaluationReportsandsummarizedintheNRCapprovedversionsofWCAP-10271includingitssupplements.Changes¹1through¹10asdiscussedinSectionAareconsistentwiththetechnicalspecificationsprovidedinWCAP-10271,Supplement1.ThesetenchangesincludeboththosechangeswhicharejustifiedwithintheWCAP(andthereforeapprovedbytheNRC)andthosechangestotheCTSwhichprovideconsistencywiththestandardtechnicalspecificationsprovidedintheWCAP.ToimplementthechangesspecificallyjustifiedbytheWCAP(Changes¹1,2,3,and6),theNRCrequireslicenseestoaddressfiveissuesasdocumentedwithintheletterfromtheWestinghouseOwner'sGrouptotheNRCdatedSeptember3,1985(Reference5).Theseconditions,andtheirresolution,areprovidedbelow.Theremainingchangeswhichprovideconsistencywithstandardtechnicalspecifications(i.e.,Changes¹4,5,7,8,9,and10)arediscussedseparately.
Q~nl~iiin1-TheRTSfunctionswhicharebeingchangedfrommonthly(0t"6i'>>,'";,w$$klj)toquarterlytestfrequenciesmustbetestedonaSTAGGERED8WACO'iYFFe~'.rTESTbasis.Forexample,withafourchannelRTSfunction,onechannelmustbetestedeverythreeweekssuchthatallchannelsaretestedeachquarter.OnechannelofathreechannelRTSfunctionmustbetestedeverymonthwhileonechannelofatwochannelRTSfunctionmustbetestedevery6weeks.~e~~n~-ThisconditionwaswithdrawnbytheNRCbyReference6andisnolongerapplicable.-1'hli<<hpdi~phpicommonmodeevaluationoffailuresintheRTSchannelswhicharetobetestedonaquarterlybasis.Thatis,sincechannelsmaybetestedonastaggeredbasis,ifthechannelbeingtestedfailsduetoapotentialcommonmodefailure,theremainingchannelsshouldbetestedorotherwiseconfirmedwithrespecttotheircontinuedoperability.R~s~gnn-TheseprocedureswillbedevelopedpriortotheimplementationoftheimprovedtechnicalspecificationsforGinnaStationcurrentlyscheduledforFebruary1996.TheseprocedureswillfollowthegeneralguidanceprovidedinReference5astowhenthiscommoncausefailureevaluationisrequired(e.g.,instrumentdriftissuesdonotrequirethisassessment).Q~n)~iin3-RoutinetestingoftheRTSanalogchannelsinthebypassconditionbyuseoftemporaryjumpersorbyliNngleadsisunacceptableduetothepotentialforhumanerrors.Therefore,plantswithoutinstalledbypasscapabilitycannotusethisoption~e@~ne-GinnaStationcurrentlydoesnothaveinstalledbypasscapabilitysuchthatroutinelybypassingchannelsinordertoperformsurveillancetestingoftheremainingchannelsisnotallowed.Assuch,RGB'asselectedtheRequiredActionswhichonlyallowthe~no~ra~lechanneltobebypassedfortestingoftheremainingchannels.TheRequiredActionswhichallowbypassingachannelprovidedthattheinoperablechannelwasplacedinthetrippedconditionwasnotselected.Therefore,routineuseofbypassfortestingpurposesisnotallowedintheproposedtechnicalspecifications.
Change810ofSectionAdeletestheshiftchannelcheckoftheTurbineFirstStagePressurefunctionandincreasesthechanneltestsurveillanceintervalfrommonthlytorefueling.ThisfunctionisonlyrelatedtoP-7whichisusedtoblockcertainreactortripsduringstartupandlowpoweroperations.ThestandardtechnicalspecificationsincludedinWCAP-10271,Supplement1donothaveashiftchannelcheckrequirementforanypermissivessincethesearenotdirectlyrelatedtotheprotectingthereactorcore.Inaddition,thetimeframeinwhichP-7isactuallyusedtoblockcertainreactortripsisexpectedtobeverysmallsuchthatthechannelcheckisnotrequiredforsafetyreasons.TheWCAPproposedtodeleteP-7sinceitisderivedfromP-13andP-10interlocksandhasnoanalogchannelsatastandardWestinghouseplant.GinnaStationdoesnothaveaP-13suchthatthisjustificationisnotapplicable.However,theWCAPspecificallyevaluatedtheincreasedSTIforallpermissives(includingP-13whichtheTurbineFirstStagePressurefunctionactsas)andfoundthechangeinSTIfrommonthlytoquarter4yie6ijJi'n'jjtobeacceptable.SinceRGB'rovidedjustificationtomeettheconditionsforimplementingWCAP-10271,Supplement1initemPlabove,thislessrestrictivechangeisconsideredacceptable.Changes811through818asdiscussedinSectionAareconsistentwiththetechnicalspecificationsprovidedinWCAP-10271,Supplement2,Revision1.TheseeightchangesincludeboththosechangeswhicharejustifiedwithinthisWCAP(andthereforeapprovedbytheNRC)andthosechangestotheCTSwhichprovideconsistencywiththestandardtechnicalspecificationsprovidedintheWCAP.ToimplementthechangesjustifiedbytheWCAP(Changes812,13,15,and16),theNRCSafetyEvaluationReport(References6and7)requireslicenseestoaddresstwoissues.Theseconditions,andtheirresolution,areprovidedbelow.Theremainingchangeswhichprovideconsistencywiththestandardtechnicalspecifications(Changes811,14,17,and18)arediscussedseparately.a.~ndi~in1-Thelicenseemustconfirmtheapplicabilityofthegenericanalysistotheimplementingplant.~Rpgn<ie-ThedesignassumptionsandmodelingassumptionspresentedinSections2and3ofWCAP-10271,Supplement2,Revision1werereviewedwithrespecttotheGinnaStationESFASdesignandoperationalpractices.TheWCAPinformationisequivalentormoreboundingwithrespecttoGinnaStationexceptasfollows:
Change812ofSectionArevisestheCompletionTimeforplacinganinoperableSteamLineIsolation-HighContainmentPressurechannelintripfrom1hourto6hours.However,thestandardtechnicalspecificationsincludedinWCAP-10271,Supplement2,donotrequireplacingthechannelintrip.Instead,theinoperablechannelmaybeplacedinbypassprovidedthattheminimumnumberofrequiredchannelsisOPERABLE.Thestandardtechnicalspecificationsidentifya2/4logicforthisfunctionwhileGinnaStationutilizes2/3logic.TheWCAPdidconsiderboth2/4and2/3logicsuchthattheWCAPisconsideredboundingwithrespecttotheGinnaStationdesign.However,RGB'onsidersitprudenttoplacetheinoperablechannelintripandrelyon1/2logicversusbypassingtheaffectedchannelandrelyingon2/2logic.TheCompletionTimeof6hourstoplacethechannelintripisconsistentwithotherESFASfunctions.Therefore,RGB'cEconsidersthislessrestrictivechangeacceptable.12.gigpigfgiAiI~'si",'"ppiiginoperablechanneloftheAuxiliaryFeedwater-Lossof4kVVoltagefunctionintrip&ettrssit1ifri]1hourto'it4iutrgtii8:::tthe¹'iohiiio'eiio':;::h'eisitoorepti~tttittito'!48hours.ThisAuxiliaryFeedwateractuationfunctionissecondarytotheSteamGeneratorLowLowandSafetyInjectionactuationsignalsandisnotspecificallycreditedintheaccidentanalyses.Assuch,ifthisfunctionweretofail,theSteamGeneratorLowLowactuationfunctionwouldeventuallystarttheturbinedrivenpumpwithinthetimelimitsassumedintheaccidentanalysis.Also,thisactioa'!md~CompletionTimeisconsistentwiththeinitialtechnicalspecificationassumptionsusedinWCAP-10271.Therefore,thislessrestrictivechangeisconsideredacceptable.Inadditiontothejustificationsprovidedabove,RGBhasevaluatedthedifferencesbetweentheproposedtechnicalspecificationscontainedinAttachmentIIandthestandardtechnicalspecificationsincludedinWCAP-10271.ThisevaluationispresentedinAttachmentV.Asshowninthisattachment,theproposedtechnicalspecificationsareequivalenttothestandardtechnicalspecificationsexceptasfollows:Inthosecaseswheretechnicaldifferencesexist,thereasonforthedifferencesisduetolessrestrictiveCTSrequirementsandnotduetootherchangesbeingproposed.TheonlyexceptiontothisiswithrespecttotheContainmentSpray-HighHighContainmentPressureandSteamLineIsolation-HighContainmentPressurefunctionswhicharediscussedinitems810and811above,respectively.InthosecaseswhereboththeCTSandproposednewtechnicalspecificationsarelessrestrictive,theissueiseitheraddressedintheconversiontoimprovedstandardtechnicalspecifications(Ref.8),discussedabove,orduetoinconsequentialdesigndifferences(e.g.,GinnaStationdoesnotorganizecontainmentisolationintoPhaseAandPhaseBfunctions).16 C.SIGNIFICANTHAZARDSCONSIDERATIONEVALUATIONTheproposedchangestotheGinnaStationTechnicalSpecificationsasidentifiedinSectionAandjustifiedinSectionBhavebeenevaluatedwithrespectto10CFR50.92(c)andshowntonotinvolveasignificanthazardsconsiderationasdescribedbelow.Thisevaluationisorganizedinto3sectionsrelatedto:(1)changesspecificallyevaluatedbyWCAP-10271anditsassociatedsupplements,(2)otherlessrestrictivechangeswhicharebeingproposed,and(3)morerestrictivechangeswhicharebeingproposed.C.lv1infAP-10271iftehneThefollowinglessrestrictivechangesspecificallyevaluatedbyWCAP-10271anditsassociatedsupplementsarebeingproposed:a.IncreasethesurveillanceintervalforRTSanalogchanneloperationaltestsfrommonthly'(0Pqti)<<'%e'eke'"'/~toquarterly.b.IncreasetheCompletionTimetoplaceaninoperableRTSanalogchannelintripfrom1hourto6hours.c.AllowaninoperableRTSanalogchanneltobebypassedforupto4hourstoperformsurveillancetestingoftheremainingchannels.~d.IncreasethesurveillanceintervalforESFASanalogchanneloperationaltestsfrommonthlytoquarterly.e.IncreasetheCompletionTimetoplaceaninoperableESFASanalogchannelintripfrom1hourto6hours.f.AllowaninoperableESFASanalogchanneltobebypassedforupto4hourstoperformsurveillancetestingoftheremainingchannelsTheseproposedchangesdonotinvolveasignificanthazardsconsiderationasdiscussedbelow:17 c.creatingthepotentialformoreeffectivemonitoringandcontrolofplantoperationsbyoperatingcrewsduetolessfrequentinstrumentationtestingdistractions.Basedupontheabove,ithasbeendeterminedthattheproposedlessrestrictivechangestotheGinnaStationTechnicalSpecificationsdonotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,doesnotcreatethe,possibilityofanewordifferentkindofaccidentpreviouslyevaluated,anddoesnotinvolveasignificantreductioninamarginofsafety.Therefore,itisconcludedthattheproposedchangesmeettherequirementsof10CFR50.92(c)anddonotinvolveasignificanthazardsconsideration.C.2vlinfherLRriciehnThefollowinglessrestrictivechanges,whichareconsistentwithWCAP-10271anditsassociatedsupplementsbutnotspecificallypartoftheoriginalinstrumentationprogram,arebeingproposed:a.SeparatetheCTSrequirementof"AutomaticTripLogicIncludingReactorTripBreakers"intotwoseparaterequirementswithadditionaltimeallowedtorestoreinoperabletrainsbeforerequiringaplantshutdown.b.RevisethetestingfrequencyoftheRTSTurbineTripfunctionfrommonthlytooncepriortostartupifithasnotbeenperformedwithinthelast31days.Define"priortostartup"tobe"within31dayspriortostartup"versus"withinthepreviousweek"fortestingofthefollowingRTSfunctions:NuclearFluxPowerRange-LowSetting,NuclearFluxIntermediateRange,andNuclearFluxSourceRange.RevisethetestingrequirementsoftheTurbineFirstStagePressuretoremovetheshiftchannelcheckandincreasethetestingintervalfroinmonthlytorefueling.IncreasetheCompletionTimetoplaceaninoperableContainmentSpray-ContainmentPressureHighHighandSteamLineIsolation-HighContainmentPressurechannelintripfrom1hourto6hoursandallowtheinoperablechanneltobebypassedforupto4hoursforsurveillancetestingoftheremainingchannels.Kepj50'ie,,':icfiob""toplaceaninoperableAuxiliaryFeedwater-TripofBothMFWPumpschannelintrip&emjjjthin31hourtof'eNorjfh'ie",;:,"ihanne'.::mjthir748hours.Theseproposedchangesdonotinvolveasignificanthazardsconsiderationasdiscussed19 below:OperationofGinnaStationinaccordancewiththeproposedchangesdoesnotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.TheproposedchangesareallconsistentwiththeplantdesignandoperatingpracticesassumedintheevaluationsprovidedinWCAP-10271andstandardtechnicalspecifications.Thesechanges,incombinationwiththechangesdiscussedinSectionC.1above,resultinonlyaminorincreaseincoredamageprobabilityduetothereducedtestingrequirements.Theproposedchangesalsodonotincreasetheseverityorconsequencesofanaccidentpreviouslyevaluated.Whileimplementationoftheproposedchangesaffectstheprobabilityof.failureoftheRTSandESFAS,itdoesnotalterthemanneriswhichprotectionisprovidednorthemannerinwhichlimitingcriteriaareestablished.Therefore,thesechangesdonotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.OperationofGinnaStationinaccordancewiththeproposedchangesdoesnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.Theproposedchangesdonotinvolveaphysicalalterationoftheplant(i.e.,nonewordifferenttypeofequipmentwillbeinstalled)noralterthefunctionoftheRTSandESFAS.Thechangesonlyprovideforadditionaltimetorestoreinoperableequipmentandincreasethesurveillancetestingintervalforcertaininstrumentation.Thus,thesechangesdonotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyevaluated.OperationofGinnaStationinaccordancewiththeproposedchangesdoesnotinvolveasignificantreductioninamarginofsafety.Theproposedchangesdonotalterthemannerinwhichsafetylimits,limitingsafetysystemsetpoints,orlimitingconditionsforoperationaredetermined.Instead,thechangesareexpectedtoresultinanoverallimprovementtosafetybyreducinginadvertentreactortripsandallowtimetoperformappropriaterepairstoinoperableequipment.Therefore,thesechangesdonoinvolveasignificantreductioninamarginofsafety.Basedupontheabove,ithasbeendeterminedthattheproposedlessrestrictivechangestotheGinnaStationTechnicalSpecificationsdonotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,doesnotcreatethepossibilityofanewordifferentkindofaccidentpreviouslyevaluated,anddoesnotinvolveasignificantreductioninamarginofsafety.Therefore,itisconcludedthattheproposedchangesmeettherequirementsof10CFR50.92(c)anddonotinvolveasignificanthazardsconsideration.20 AttachmentIIChanges