ML17332A343

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Application for Amends to Licenses DPR-58 & DPR-74,revising TS Re RCS Pressure Isolation Valves
ML17332A343
Person / Time
Site: Cook  American Electric Power icon.png
Issue date: 10/07/1994
From: FITZPATRICK E
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17332A344 List:
References
AEP:NRC:1180A, NUDOCS 9410170196
Download: ML17332A343 (17)


Text

ACCELERATEDRIDSPROCESSING)REGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9410170196DOC.DATE:94/10/07NOTARIZED:NODOCKETIFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM0500031550-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONPFITZPATRICK,E.IndianaMichiganPowerCo.(formerlyIndiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)R

SUBJECT:

ApplicationforamendstolicensesDPR-586DPR-74,requestchangerereactorcoolantsystempressureisolationvalves.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTRIENCLgSIZE:ITITLE:ORSubmittal:GeneralDistributionNOTESRECIPIENTIDCODE/NAMEPD3-1LAHICKMAN,JINTERN:%LE,CENTZRNRR/DRCH/HICBNRR/DSSA/SPLBNUDOCS-ABSTRACTEXTERNAL:NOACCOPIESLTTRENCL111111111111RECIPIENTIDCODE/NAMEPD3-1PDNRR/DE/EELBNRR/DRPWNRR/DSSA/SRXBOGC/HDS2NRCPDRCOPIESLTTRENCL111111111011DUNNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEiVASTE!CONTACTTHEDOCUifENTCONTROLDESK,ROO!vIPl-37(EXT.504-2083)TOELINIINATEYOURMAML'ROD!DISTRIBUTIONLISTSI'ORDOCUMENTSYOUDON"I'L'ED!TOTALNUMBEROFCOPIESREQUIRED:LTTR13ENCL12 JE)III indianaMichiganPowerCompanyP.O.8ox16631Cofumbus,OH43216AEP:NRC:1180ADonaldC.CookNuclearPlantUnits1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74ADDITIONALINFORMATIONFORTECHNICALSPECIFICATIONCHANGEREQUESTREACTORCOOLANTSYSTEMPRESSUREISOLATIONVALVESU.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,DC20555Attn:W.T.RussellOctober7,1994

DearMr.Russell:

Reference:

AEP:NRC:1180,TechnicalSpecificationChangeRequest,November15,1993Inaccordwithrequestsfromyourstaff,thisletteranditsattachmentssupplyadditionalinformationtosupportandamendourpreviousapplication,containedinthereferencedletter,foratechnicalspecificationl,'T/S)changeforDonaldC.CookNuclearPlantUnits1and2.Specifically,inthereferencedletterweproposedandsupportedthedeletionoftheoverlyrestrictiveleakagelimitationrequirementsforReactor'oolantSystemPressureIsolationValveslistedinT/STable3.4-0,whilemaintainingthemore,reasonabletestingrequirementsforthesubjectvalvesinaccordancewithASMESectionXI.InconversationsheldonSeptember26,1994,yourstaffindicatedthattherewerenotechnicalconcernswiththesubjectrequest;however,theysuggestedaslightlydifferentapproachtoachievingthesamechange.InsteadofdeletingthesubjecttestingrequirementsfromtheT/Ss,thestaffsuggestedandweagreedtoreplacethecurrentT/StestingrequirementswiththoserequiredbyASMESectionXI.9'410170196941007PDRRDQDK050003i5I.....=..PDR,o(

Mr.W.T.Russell-2-AEP:NRC:1180AAttachment1tothislettercontainstheadditionalinformationrequestedbyyourstafftosupportthesemodificationstoourT/Ss.Foryourconvenience,allofthepreviouslysuppliedinformationinthereferencedletterhasbeenincludedinthisattachment,withchangesindicatedintherighthandmargintoaddresstheNRC'srequestedapproachasoutlinedabove.TheaffectedT/Spages,markedtoshowproposedrevisions,areincludedinAttachment2.Attachment3containstheaffectedT/Spages,withproposedchangestypedinplace.Webelievethattheproposedchangeswillnotresultin(1)asignificantchangeinthetypesofeffluentsorasignificantincreaseintheamountsofanyeffluentthatmaybereleasedoffsite,or(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheT/SchangesoriginallyproposedinthereferencedletterwerereviewedbythePlantNuclearSafetyReviewCommitteeandtheNuclearSafetyandDesignReviewCommittee.ThechangestothatsubmittalincludedhereinhavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandwillbereviewedbytheNuclearSafetyandDesignReviewCommitteeatitsnextscheduledmeeting.Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtothe~MichiganPublicServiceCommissionandtotheMichiganDepartmentofPublicHealth.Thisletterissubmittedpursuantto10CFR50.30(b)and,assuchanoathstatementisattached.Sincerely,VicePresidentcadAttachments Mr.W.T.RussellAEP:NRC'1180Acc:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINFEMSectionChiefNRCResidentInspector-BridgmanJ.R.Padgett COUNTYOFFRANKLINE.E.Fitzpatrick,beingdulysworn,deposesandsaysthatheistheVicePresidentoflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingTechnicalSpecificationChangeRequestReactorCoolantSystemPressureIsolationValvesandknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledgeandbelief.Subscribedandsworntobeforemethis~4dayof19~%NTARYPUBLCR)TAD.HILLNOTARYPUBLIC.STATEOFOHIO 4il ATTACHMENT1TOAEP'NRC:1180ADESCRIPTIONOFPROPOSEDCHANGESAND10CFR50.92SIGNIFICANTHAZARDSCONSIDERATIONANALYSIS~~

ATTACHMENT1TOAEP:NRC:1180APage1BACKGROUNDTheReactorSafetyStudyWASH-1400/NUREG75/014(Reference,l)analyzeda.so-calledEventVSequenceresultinginanintersystemloss-of-coolantaccident(ISLOCA).ItwasconcludedthattheISLOCAwasasignificantcontributortocoredamagefrequencysincethecontainmentisbypassedandreactorcoolantisreleaseddirectlytotheauxiliarybuilding.Asaresultoftheabovefinding,theUSNRCissuedaletter,"LWRPrimaryCoolantSystemPressureIsolationValves,"datedFebruary25,1980,(Reference2),requestingLWRlicenseestoprovidethefollowinginformation:'DescribethevalveconfigurationatyourplantandindicateifanEventVisolationvalveconfigurationexistswithintheClassIboundaryofthehighpressurepipingconnectionPCSpipingtolowpressuresystempiping;e.g.,(1)twocheckvalvesinseries,or(2)twocheckvalvesinserieswithaMOVI2...,Ifeithero'ftheaboveEventVconfigurationsexistsmt.'yourfaci3.ity,'indicatewhether.;:.continuous'surveillance'r'eqiodictests.are'e'ingaccomplishedonsuchvalvestoensureintegrity.Alsoindicatewhethervalveshavebeenknown,orfound,tolackintegrity;and3.IfeitheroftheaboveEventVconfigurationsexistatyourfacility,indicatewhetherplantproceduresshouldberevisedorifplantmodificationsshouldbemadetoincreas'ereliability.AEPSCrespondedtotheaboveUSNRCletterwithletterAEP:NRC:0371,"ReactorCoolantSystemPressureIsolationValves,"datedMarch24,1980,(Reference3).Inthisletter,theUSNRCwasinformedthatthefollowingvalveconfigurationsareusedatCookNuclearPlant:1)Aminimumofthreecheckvalvesinseries,2)Twocheckvalveswithaminimumofaclosedmotoroperatedvalveinseries, ATTACHMENT1TOAEP:NRC:1180APage23)Twocheckvalveswithaclosedhandoperatedvalveinseries,and/or4)Acheckvalvewithtwoclosedairoperatedvalves.inseries.AEP:NRC:0371concludedthat:"ThereforenoEventVconfigurationexistsattheCookNuclearPlant.Consequently,therequestsinItems2and3ofMr.Eisenhut'sletterarenotapplicabletotheCookNuclearPlant."OnApril20,1981,theUSNRCissuedan"OrderforModificationofLicensesConcerningPrimaryCoolantSystemPressureIsolationValves"forCookNuclearPlant(Reference4).Thisorderstatedthat"WehaveconcludedthataWASH-1400EventVvalveconfigurationexistsatyourfacilityandthatthecorrectiveactionasdefinedintheattachedorderisnecessary."AttachedtotheorderweretheTechnicalEvaluationReport(TER)supportingtheorderandthenewtechnicalspecifications(T/Ss)which,accordingtotheorder,"...willensurepublichealthandsafetyovertheoperatinglifeofyourfacility."ThesenewT/SswereincorporatedatthattimeintotheoperatinglicensesforCookNuclear.Plant.,'h1987,'the'USNRC'.issuedgeneric.,let<br.(GL)'.87-06;"."PeriodicVerific'ationofLeak'TightIntegrityofPressureIsolation'Valves"'(Reference5).InourresponsetothatGL,AEP:NRC:1041(Reference6),westatedthat12-SI-170L2,12-SI-170L3,12-RH-133,and12-RH-134areleaktestedasperthesurveillancerequirementsintheT/Ss.Theproposedchangesinthissubmittal,therefore,modifyourresponsetoGL87-06.Finally,in1992,theUSNRCissuedinformationnotice92-36,"IntersystemLOCAOutsideContainment"(Reference7).Thisinformationnoticelistedeleven"ObservedPlantVulnerabilitiestoISLOCAPrecursors."AreviewofthisinformationnoticeconcludedthattheconcernsraisedareadequatelyaddressedbycontrolscurrentlyinplaceorplannedattheCookNuclearPlant..TheproposedchangestotheT/SswillnotalterthisconclusionbecauseourresponsetotheinformationnoticewasnotbasedonexistingT/Ss.

ATTACHMENT1TOAEP'NRC'1180APage3COOKNUCLEARPLANTIPEOnMay1,1992,AEPSCrespondedtogenericletter88-20(Reference8),inAEP:NRC:1082E,IndividualPlantExamination(IPE)submittal(Reference9),andprovidedfurtherinformationontheanalysisoftheISLOCAinReference10.(SeetheEnclosure,tothis

Attachment:

DonaldC.CookNuclearPlant,PathsConsideredasPossibleEventV-SequenceLOCA,takenfromReference10).InthedeterminationoftheISLOCAinitiatingeventfrequency,leaktestingof12-SI-170L2,12-SI-170L3,12-RH-133,and12-RH-134,asrequiredbythesurveillancerequirementsintheT/Ss,wasaddressed.TheIPEforCookNuclearPlantconcludedthattheISLOCAwastheaccidentthatcontributedtheleasttotheoverallcoredamagefrequency.ThecalculatedISLOCAinitiatingeventfrequencywasapproximately6.70E-07,andthecalculatedprobabilityofISLOCAcoredamagewasapproximately5.4E-08.ThecontributiontooverallcoredamagefrequencyfromanISLOCAislessthan0.1%ofthe6.26E-05IPEcalculatedcoredamagefrequencyperreactoryear.Itisseen,therefore,thatthecontributionfromanISLOCAeventatCookNuclearPlantisnegligible.ACOMPARISON.OFWASH1400VSCOOKCLEARPLANTWITH.RESPECT'~TOXSOOATheISLOCA.accidentisde'scribedinSection5.3.2.5ofWASH.-1400,andthequantificationofitscoredamagefrequency,isSoundinAppendixV,Section4.4ofWASH-1400.ThecoredamagefrequencycalculatedinWASH-1400is4.00E-06/reactoryear.WASH-1400evaluatedthreepathwaysoftwocheckvalvesinseries,andassumedthatthe600psiLowPressureInjectionSystem(LPIS),onceexposedtoRCSpressure,wouldfailandcreateapproximatelya6"effectivediameterLOCA.Nootheraccidentinitiationfeaturesormitigatingactionsweremodeled.IntheCookNuclearPlantIPE,ninedifferentpathwaysforanISLOCAeventwereanalyzed.Thesepathways(seeEnclosuretothisAttachment),consistedofeitherthreecheckvalvesinseries,twocheckvalvesandaclosedmotoroperatedvalve(MOV)inseries,ortwonormallyclosedMOVsinseries.AlthoughWASH-1400lookedatcheckvalveleaktestingasasensitivityanalysis,theCookNuclearPlantIPEaccountedforthein-placeleaktestingwhen'alculatingtheprobabilityofanISLOCAoccurring.Inaddition,theCookNuclearPlantIPEmodeledmitigatingactionsfortheISLOCAeventintheeventtree.The ATTACHMENT1TOAEP:NRC:1180APage4.lowpressureinjectionsystempipingwasreviewed,andfoundtobecapableofwithstandingthefullpressureofthereactorcoolantsystem.Onlyhoopstresseswerefoundtobesignificant,sinceafterinitiationofanISLOCAtheheatuprateofthepipingwouldberelativelyslow,minimizingthermalstresses.Thus,isolationoftheLOCApathwayandpotentiallysuccessfulmitigatingactivitiesarepossible.TheIPEISLOCAinitiatingeventfrequencywasapproximatelyanorderofmagnitudelowerthantheWASH-1400coredamagefrequency(4.00E-06),andtheIPEISLOCAcoredamagefrequencyvaluewasapproximatelytwoordersofmagnitudelowerthantheWASH-1400values.Finally,toaddresstheimpactofremovingtheT/Srequirementsandonlytesting12-SI-170L2,12-SI-170L3,12-RH-133,and12-RH-134atarefuelingoutagefrequency,asensitivityrunwasmadeinsupportofthissubmittal.Sincetheinserviceinspectionprogramwilldiscoverarupturedvalve,theadditionalT/Srequirementwasonlycreditedwiththeabilitytoidentifyastuckopenvalve.Thiscreditwasremovedforthissensitivityrun.ItwasfoundthattheISLOCAinitiatingeventfrequency,andISLOCAprobabilityofcoredamagewouldalsoincreaseby5.4%tothemid5.00E-08range,andtheoverallcoredamagefrequencywouldremainunchanged.Thus,theproposedT/Swillessentially'rovideprotectionequivalenttotheexistingT/SfromanISLOCA.ISTPROGRAMThesubjectcheckvalvesofthissubmittalarecurrentlybeingtestedinMode5,ColdShutdown,asrequiredbytheT/SssurveillancerequirementspriortogoingtoMode4,HotShutdown.Theallowableleakratecannotexceed1gpm.IftheT/Ssaremodifiedasrequested,thesevalveswouldcontinuetobetestedundertheISTProgram(ASMEBoilerandPressureVesselCode,SectionXI),onarefuelingoutagefrequency,liketheirsistervalvesint'eotherloops'intheResidualHeatRemovalSystem.TheacceptancecriteriafortheleaktestingofthesevalvesundertheISTProgramhasbeendefinedhereas0.5gpmpernominalinchofvalvesize,consistentwithNUREG-1431(Reference12).

ATTACHMENT1TOAEP:NRC:1180APage5DESCRIPTIONOFPROPOSEDTECHNICALSPECIFICATIONCHANGESTheproposedchangesarelistedbelow.Theyareidenticalforbothunits.1~PT/S3.4.6.2f.Replaceinitsentirety.2.T/S3.4.6.2APPLICABILITY:Delete"**"andreplacewitha"*"3.T/S3.4.6.2ACTIONc.Delete"exceptwhen...by50$ormore."T/S3.4.6.2ACTIONc,footnote*.Deletethefootnote.5.T/S3.4'.2APPLICABILITY,footnote**.ChangetheIt'lltoII*II6.T/S4.4.6.2.2.Replaceitwiththefollowingtext:"Eachreactor'oolantsystempressure.isolationvalvespecifiedinTable3..4-.0'shallbe.,'demonstrate@'OPERABLE'pursuant.to..'Sp'ecification4:05."7.T/S3/4.6.2,Table3.4-0.ReplacetheTableinitsentirety.10CFR502SIGNIFICANTHAZARDSCONSIDERATIONANALYSISPer10CFR50.92,aproposedamendmenttoanoperatinglicensewillnotinvolveasignificanthazardsconsiderationiftheproposedamendmentsatisfiesthefollowingthreecriteria:1)Doesnotinvolveasignificantincreaseintheprobabilityorconsequencesofan.accidentpreviouslyanalyzed,2)doesnotcreatethepossibilityofanewordifferentkindofaccidentfromanaccidentpreviouslyanalyzedorevaluated,or3)doesnotinvolveasignificantreductioninamarginofsafety.

ATTACHMENT1TOAEP:NRC:1180APage6Criterion1TheISLOCAisnotoneoftheaccidentspreviouslyanalyzedinChapter14,SafetyAnalysis,oftheCookNuclearPlantUpdatedFinalSafetyAnalysisReport.Chapter14analyzesthelargebreakLOCAinSection14.3.1,and"lossofreactorcoolantfromsmallrupturedpipesorfromcracksinlargepipeswhichactuatestheECCS,"orsmallbreakLOCAinSection14.3.2.Therefore,theproposedT/SsmodificationstotheReactorCoolantSystempressureisolationvalvesinTable3.4-0,willnotincreasetheprobabilityortheconsequencesofthelargebreakorthesmallbreakLOCAspreviouslyanalyzedfortheCookNuclearPlant.Criterion2TheReactorCoolantSystempressureisolationvalvesinTable3.4-0oftheT/SswereaddedbecauseWASH-1400identifiedtheISLOCAasasignificantcontributortocoredamagefrequency.TheproposedmodificationsofthesubjectvalvesTechnicalSpecificationsurveillancerequirementstorelyonthetestingrequirementsmandatedbytheIn-ServiceTestingProgramofASMEXIdoesnotcreatethepossibilityofanewordifferentkindofaccidentfromthelargebreakorthesmallbreakLOCAspreviouely.analyzed'or.theCookNuclearPlant.,I~riterfon3TheproposedmodificationstotheReactorCoolantSystempressureisolationvalvestestingrequirementsinTable3.4-0oftheT/Ss,willresultinthesevalvesonlybeingtestedonarefuelingoutagefrequencyaspartoftheASMEB6PVCodeSectionXIISTProgram.ThissomewhatreducedtestingfrequencywillresultinaslightincreaseintheISLOCAinitiatingeventfrequency,andISLOCAcontributiontocoredamagefrequencyby5.4%,fromlower5.00E-08/reactoryeartomid5.00E-08/reactoryear.Thisinsignificantincreasewillnotaffecttheoverallcoredamagefrequencyof6.26E-05/reactoryear.Therefore,itisconcludedthattheproposedchangestotheT/SrequirementsfortheReactorCoolantSystempressureisolationvalvesinTable3.4-0,willnotresultinasignificantreductioninthemarginofsafetythatexistsatCookNuclearPlanttopreventanISLOCAortomitigatetheconsequencesofanISLOCA.

ATTACHMENT1TOAEP:NRC:1180APage7REFERENCESWASH-1400/NUREG75/014,ReactorSafetyStudy:AnAssessmentofAccidentRisksinU.S.CommercialNuclearPlants,USNRC,October1975.2.USNRCLettertoallLWRLicensees:LWRPrimaryCoolantSystemPressureIsolationValves,February25,1980.3.AEP:NRC:0371,ReactorCoolantSystemPressureIsolationValves,March24,1980.4.Letter,S.A.Varga,USNRCtoJ.Dolan,IndianaandMichiganElectricCompany,OrderforModificationofLicensesConcerningPrimaryCoolantSystemPressureIsolationValves,April20,1981.5.USNRCGenericLetter(GL)87-06,"PeriodicVerificationofLeakTightIntegrityofPressureIsolationValves,"March13,1987.6.7..AEP:NRC:1041,GenericLetter87-06,PeriodicVerification'of'LeakTight'Integrityof"PressureIsolationValves>..November12,3.987,'X~USNRCInformationNotice92-36,."IntersystemLOCAOutsideContainment,"May,7,1992.8.InitiationoftheIndividualPlantExaminationforSevereAccidentVulnerabilities-10CFR50.54(f),GenericLetterNo.'8-20,November23,1988.9.AEP:NRC:1082E,IndividualPlantExaminationSubmittal,ResponsetoGenericLetter88-20,May1,1992.10.AEP:NRC:1082F,IndividualPlantExaminationResponsetoNRCQuestions,.February24,1993.AEP:NRC:1180,TechnicalSpecificationChangeRequest,ReactorCoolantSystemPressureIsolationValves,November15,1993.12.NUREG-1431,StandardTechnicalSpecificationsforWestinghousePlants,September1992.

ATTACHMENT2TOAEP:NRC:1180AMARKED-UPTECHNICALSPECIFICATIONPAGES