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{{#Wiki_filter:.ACCELERATEDDIQGBUTIONDEMONSTPTIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSTEN(BIDS)P!ACCESSXQNNBR:9206180194DGC.DATE:92/08/12NOTARIZED:YESDOCKET(I:FACXL:50-31,5DonaldC.CookNuclearPoeerPlant'nitiiIndiana80500031550-316DonaldC.CookNuclearPowerPlantiUnit2.XndianaN05000316AUTH.NANEAUTHORAFFILIATXGNFITZPATRICK'.IndianaNichiganPoeerCo.(formerlyIndiana5NichiganEleRECIP.NAXERECXrXENTAFFILIATIONNURLEYiT.E.DocumentControlBranch(DocumentControlDesk3
{{#Wiki_filter:.ACCELERATED DIQGBUTION DEMONSTPTIONSYSTEMREGULATORY INFORMATION DISTRIBUTION STEN(BIDS)P!ACCESSXQN NBR:9206180194 DGC.DATE:92/08/12NOTARIZED:
YESDOCKET(I:FACXL:50-31,5DonaldC.CookNuclearPoeerPlant'nitiiIndiana80500031550-316DonaldC.CookNuclearPowerPlantiUnit2.XndianaN05000316AUTH.NANEAUTHORAFFILIATXGN FITZPATRICK'.
IndianaNichiganPoeerCo.(formerly Indiana5NichiganEleRECIP.NAXERECXrXENTAFFILIATION NURLEYiT.E.DocumentControlBranch(Document ControlDesk3


==SUBJECT:==
==SUBJECT:==
ApplicationforamendstoLicensesDPR-58ZcDPR-74>modifyingUnit1TS3.3.3.8.Table3.3-115Unit2TS3.3.3.6>Table3.3-10tochangeminchannelsrequiredtobeoperableforsafettIvalvepositionindicatoracousticmonitor.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRiENCLjSIZE:TITLE:ORSubmittal:GeneralDistributionDNOTES:RECIPIENTIDCODE/NAI"!EPD3-1LASTANGiJINTERMAL:NRR/DET/ESGBNRR/DST/SELB7ENRR/DST/SRXBBEGC/FXLE01COPIESLTTRENCL1122111110,RECIPIENTIDCODE/N*NEPD3-1PDNRR/DOEA/QTSB11NRR/DST/6ICBSH7NUDGCS-ABSTRACTOGC/HDS2RES/DSXR/EXBCOPIESLTTRENCL11111011DDEXTERNAL:NRCPDRDNOTETOALL"RIDS"RECIPIENTS:DPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMP1-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMEPWSYOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:LTTRibENCL14 C~,l IndianaMichiganPowerCompanyP.O.Box16631Columbus,OH43216AEP:NRC:1170DDonaldC.CookNuclearPlantUnits1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74UNITS1AND2PRESSURIZERSAFETYVALVEPOSITIONINDICATORACOUSTICMONITORTECHNICALSPECIFICATIONAMENDMENTREQUESTU.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,D.C.20555Attn:T.E.MurleyAugust12,1992
Application foramendstoLicensesDPR-58ZcDPR-74>modifying Unit1TS3.3.3.8.Table3.3-115Unit2TS3.3.3.6>Table3.3-10tochangeminchannelsrequiredtobeoperableforsafettIvalvepositionindicator acousticmonitor.DISTRIBUTION CODE:A001DCOPIESRECEIVED:
LTRiENCLjSIZE:TITLE:ORSubmittal:
GeneralDistribution DNOTES:RECIPIENTIDCODE/NAI"!E PD3-1LASTANGiJINTERMAL:NRR/DET/ESGB NRR/DST/SELB 7ENRR/DST/SRXB BEGC/FXLE01COPIESLTTRENCL1122111110,RECIPIENT IDCODE/N*NE PD3-1PDNRR/DOEA/QTSB11 NRR/DST/6 ICBSH7NUDGCS-ABSTRACT OGC/HDS2RES/DSXR/EXB COPIESLTTRENCL11111011DDEXTERNAL:
NRCPDRDNOTETOALL"RIDS"RECIPIENTS:
DPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMP1-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMEPWS YOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:
LTTRibENCL14 C~,l IndianaMichiganPowerCompanyP.O.Box16631Columbus, OH43216AEP:NRC:1170D DonaldC.CookNuclearPlantUnits1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74UNITS1AND2PRESSURIZER SAFETYVALVEPOSITIONINDICATOR ACOUSTICMONITORTECHNICAL SPECIFICATION AMENDMENT REQUESTU.S.NuclearRegulatory Commission DocumentControlDeskWashington, D.C.20555Attn:T.E.MurleyAugust12,1992DearDr.Murley;Thisletteranditsattachments constitute anapplication forTechnical Specifications (T/Ss)changesforDonaldC.CookNuclearPlantUnits1and2.Specifically, weareproposing tomodifyUnit1T/S3.3.3.8Table3.3-11andUnit2T/S3.3.3.6Table3.3-10tochangetheminimumchannelsoperableforthepressurizer safetyvalvepositionindicator acousticmonitor(Instrument 14)totwooutofthreetotalfromonepervalve.Wearealsoproposing toremovethe*****footnotes andreferences tothe*****footnotes thatwereaddedduringthepreviousoperating cycleforeachunitandarenolongerineffect.Attachment 1providesadetaileddescription oftheproposedchanges,thejustification forthechanges,andourproposeddetermination ofnosignificant hazardsconsideration performed pursuantto10CFR50.92(c).
Attachment 2containstheexistingT/Sspagesmarkedtoreflecttheproposedchanges.Attachment 3containstheproposedT/Sspages.TheproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andbytheNuclearSafetyandDesignReviewCommittee.
Incompliance withtherequirements of10CFR50.91(b)(1),
copiesofthisletteranditsattachments havebeentransmitted toMr.J.R.PadgettoftheMichiganPublicServiceCommission andtotheMichiganDepartment ofPublicHealth.;9208i80194 9208i2'i>"I~DR,ADOCK050003i5P''"'',PDR ll Dr.T.E.Hurley-2-AEP:NRC:1170D Thisletterissubmitted pursuantto10CFR50.54(f)and,assuch,anoathofaffirmation isenclosed.
Sincerely, E.E.FitzpatickVicePresident dagEnclosure Attachments cc:D.H.Williams, Jr.A.A.Blind-BridgmanJ.R.PadgettG.CharnoffNFEHSectionChiefA.B.Davis-RegionIIINRCResidentInspector
-Bridgman COUNTYOFFRANKLINE.E.Fitzpatrick, beingdulysworn,deposesandsaysthatheistheVicePresident oflicensee, IndianaMichiganPowerCompany,thathehasreadtheforgoingUnits1and2Pressurizer SafetyValvePositionIndicator AcousticMonitorTechnical Specification Amendment Request,andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledge andbelief.Subscribed sndsworntobeforemethislasrdayof19~(NOTARYUBLIC


==DearDr.Murley;ThisletteranditsattachmentsconstituteanapplicationforTechnicalSpecifications(T/Ss)changesforDonaldC.CookNuclearPlantUnits1and2.Specifically,==
Attachment 1toAEP:NRC:1170D 10CFR50.92 Determination forProposedChangestotheDonaldC.CookNuclearPlantUnits1and2Technical Specifications Attachment 1toAEP:NRC:1170D Page11.0SECTIONSTOBECHANGEDUnit1:Table3.3-11ofTechnical Specification (T/S)3.3.3.8.Unit2:Table3.3-10'ofTechnical Specification (T/S)3.3.3.6.2.0EXTENTOFCHANGESWeareproposing tochangetheminimumnumberofchannelsoperableforthepressurizer safetyvalvepositionindicator acousticmonitors(Instrument 14inUnit1T/STable3.3-11andUnit2T/STable3.3-10)fromonepervalvetotwooutofthreetotal.Wearealsoproposing todeletethe*****footnotes andreferences tothe*****footnotes inthesametablesbecausethereferenced operating cyclehasbeencompleted andtheyarenolongerapplicable.
weareproposingtomodifyUnit1T/S3.3.3.8Table3.3-11andUnit2T/S3.3.3.6Table3.3-10tochangetheminimumchannelsoperableforthepressurizersafetyvalvepositionindicatoracousticmonitor(Instrument14)totwooutofthreetotalfromonepervalve.Wearealsoproposingtoremovethe*****footnotesandreferencestothe*****footnotesthatwereaddedduringthepreviousoperatingcycleforeachunitandarenolongerineffect.Attachment1providesadetaileddescriptionoftheproposedchanges,thejustificationforthechanges,andourproposeddeterminationofnosignificanthazardsconsiderationperformedpursuantto10CFR50.92(c).Attachment2containstheexistingT/Sspagesmarkedtoreflecttheproposedchanges.Attachment3containstheproposedT/Sspages.TheproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandbytheNuclearSafetyandDesignReviewCommittee.Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtoMr.J.R.PadgettoftheMichiganPublicServiceCommissionandtotheMichiganDepartmentofPublicHealth.;9208i801949208i2'i>"I~DR,ADOCK050003i5P''"'',PDR ll Dr.T.E.Hurley-2-AEP:NRC:1170DThisletterissubmittedpursuantto10CFR50.54(f)and,assuch,anoathofaffirmationisenclosed.Sincerely,E.E.FitzpatickVicePresidentdagEnclosureAttachmentscc:D.H.Williams,Jr.A.A.Blind-BridgmanJ.R.PadgettG.CharnoffNFEHSectionChiefA.B.Davis-RegionIIINRCResidentInspector-Bridgman COUNTYOFFRANKLINE.E.Fitzpatrick,beingdulysworn,deposesandsaysthatheistheVicePresidentoflicensee,IndianaMichiganPowerCompany,thathehasreadtheforgoingUnits1and2PressurizerSafetyValvePositionIndicatorAcousticMonitorTechnicalSpecificationAmendmentRequest,andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledgeandbelief.Subscribedsndsworntobeforemethislasrdayof19~(NOTARYUBLIC


Attachment1toAEP:NRC:1170D10CFR50.92DeterminationforProposedChangestotheDonaldC.CookNuclearPlantUnits1and2TechnicalSpecifications Attachment1toAEP:NRC:1170DPage11.0SECTIONSTOBECHANGEDUnit1:Table3.3-11ofTechnicalSpecification(T/S)3.3.3.8.Unit2:Table3.3-10'ofTechnicalSpecification(T/S)3.3.3.6.2.0EXTENTOFCHANGESWeareproposingtochangetheminimumnumberofchannelsoperableforthepressurizersafetyvalvepositionindicatoracousticmonitors(Instrument14inUnit1T/STable3.3-11andUnit2T/STable3.3-10)fromonepervalvetotwooutofthreetotal.Wearealsoproposingtodeletethe*****footnotesandreferencestothe*****footnotesinthesametablesbecausethereferencedoperatingcyclehasbeencompletedandtheyarenolongerapplicable.3.0CHANGESREUESTEDIdenticalchangesarebeingsoughtforboththeUnit1andUnit2TechnicalSpecifications.3.1UNIT1WeareproposingtomakethefollowingchangestotheUnit1-"""TechnicalSpecifications.ReviseTable33-11"Post-AccidentMonitorinInstrumentation"Currently,Instrument14ofTable3.3-11hasanexceptiondenotedbya*****footnote.Weareproposingtodeletethisfootnote.Also,Instrument14ofTable3.3-11requiresthatasaminimum,onechannelpervalvebeoperable.Weareproposingtochangethistorequirethat,asaminimum,twooutofthreechannelstotalbeoperable.3.2UNIT2WeareproposingtomakethefollowingchangestotheUnit2TechnicalSpecifications.ReviseTable33-10"Post-AccidentMonitorinInstrumentation"Currently,Instrument14ofTable3.3-10hasanexceptiondenotedbya*****footnote.Weareproposingtodeletethisfootnote.
==3.0 CHANGESREUESTEDIdentical==
Attachment1toAEP:NRC:1170DPage2Also,Instrument14ofTable3.3-10requiresthat,asaminimum,onechannelpervalvebeoperable.Weareproposingtochangethistorequirethat,asaminimum,twooutofthreechannelstotalbeoperable.4.0DISCUSSIONSstemDescritionThereactorcoolantsystemisprotectedagainstoverpressurizationbycontrolandprotectivecircuits,suchasthepressurizerpressurehighreactortrip,andbythethreepower-operatedreliefandthreesafetyvalvesconnectedtothetopofthepressurizer.Uponopening,thesevalvesdischargesteamintothepressurizerrelieftank,whichcondensesandcollectsthevalveeffluent.Thissubmittaladdressesthemonitoringinstrumentationassociatedwiththepressurizersafetyvalvesandthepressurizerrelieftank.Thepurposeoftheacousticmonitorsistoprovidetheoperatorwithinformationregardingsafetyvalvepositionduringpost-accidentconditions.Twoindependentmonitoringsystemsexistthatalerttheoperatortothepassageofsteamthroughthesafetyvalvesduetovalvelift.Inoneoftheindependentmonitoringsystems,anacousticmonitor(QR-107A,B,andC)onthedischargeofeachsafetyvalvedetectsacousticvibrationsgeneratedfromthesteamflowingthroughthepressurizersafetyvalve,andactuatesanalarmandprovidesavisualdisplayofpercentageoffullflowinthecontrolroom.Duetothemagnitudeoftheacousticvibrationsandthesensitivityoftheinstrumentation,allthreemonitorswilldetecttheopeningofanyoneofthethreepressurizersafetyvalves.TheacousticmonitorswereaddedtomeettherequirementsofNUREG-0578,"TMI-2LessonsLearnedTaskForceStatusReportandShortTermRecommendations,"andNUREG-0737,"ClarificationofTMIActionPlanRequirements,"andareenvironmentallyqualified.Duringnormaloperationtheacousticmonitorsarenotusedtodetectpressurizersafetyvalveleakage.Intheotherindependentmonitoringsystem,atemperaturesensor(NTA-151,-152,-153)downstreamoftheacousticsensorgeneratesasignalthatactuatesacontrolroomalarmwhenatemperatureincreaseisexperiencedintheline,aswouldbethecaseifthepressurizersafetyvalvereleasedsteam.Theattachedsimplifieddiagramillustratesthisportionofthesystem.Indicationsofthetemperature,pressureandwaterlevelofthepressurizersafetyrelieftankarealsoprovidedinthecontrolroomandprovideadditionalindicationofpressurizersafetyvalveleakageduringnormaloperation.Thetemperatureofthewater Attachment1toAEP:NRC:1170DPage3inthepressurizerrelieftankismeasuredandindicatedbyinstrumentnumberNTA-351.Analarmresultingfromthissignalisactuatedbyhigh~atertemperature,andinformstheoperatorthatcoolingofthe"pressurizerrelieftankcontentsisrequired.Thepressurizerrelieftankpressuretransmitter(NPA-351)operatesahighandlowpressurealarm.Thepressurizerrelieftankleveltransmitter(NLA-351)providesasignalforalevelindicationandahighandlowtanklevelalarms.Consequently,adischargefromoneofthepressurizersafetyvalveswillcausetheseinstrumentstoprovideanalarmindicationinthecontrolroom.Alldownstreamtemperature,pressure,andtanklevelindicationsarenotenvironmentallyqualified.Inanemergencysituation,theoperatordoesnotuseasignalfromthepressurizersafetyvalvepositionindicatoracousticmonitorsas,anactioninitiator.Theoperatorrespondstootherindicationsoflossofreactorcoolantinventory.Astheoperatordoesnothavedirectcontrolofthepressurizersafetyvalve,"where"thelossofinventoryisoccurringisoflessimportancethancompensatingforthelossofinventory.Inaddition,theCookNuclearPlantemergencyoperatingproceduresdonotreferencethepressurizersafetyvalvepositionindicatoracousticmonitorsforthereasonstatedabove.ReasonforProosedTechnicalSecificationChaneReuestTherequesttoremovethefootnotesandreferencestothefootnotesismadeinordertoclarifytheTechnicalSpecificationsandtoremoveunnecessaryinformation.Withregardtochangingtheminimumnumberofoperablechannelsfromonepervalvetotwooutofthreetotal,inlettersAEP:NRC:1170datedDecember16,1991andAEP:NRC:1170BdatedJanuary22,1992,amendmentswererequestedtotheUnit2andUnit1TechnicalSpecifications,respectively,tointroducethe*****footnoteswhichareproposedtobedeletedbythisletter.Theserequestsweremadeonanexpeditedbasistoprecludeanunwarrantedshutdownofeachreactorunit.Webelievethereliefthatwasgrantedonatemporarybasiscanbesafelyimplementedonapermanentbasis.Sincemostofthepressurizersafetyvalvepositionindicatoracousticmonitorsystemisinaccessibleduringpoweroperation,thishastheadvantageofpotentiallyeliminatingtheneedforplantshutdownorforexpeditedoremergencyT/Sreliefshouldanacousticmonitorbecomeinoperableinthefuture.Webelievethathavinganacousticmonitorinoperabledoesnotwarrantreactorandplantshutdown.AstheT/Ssarecurrentlystated,shouldonepressurizersafetyvalvepositionindicator 4
changesarebeingsoughtforboththeUnit1andUnit2Technical Specifications.
Attachment1toAEP:NRC:1170DPage4acousticmonitorbecomeinoperable,itmustberestoredtooperablestatuswithinthirtydaysortheunitmustbeinhotshutdownwithinthesubsequenttwelvehours.Thermalcyclingfromunwarrantedplantshutdownsincreasesthelikelihoodofreactorvesselfatiguestresscyclesandunnecessarilychallengesthesafetysystems.Becauseasignalfromthepressurizersafetyvalvepositionindicatoracousticmonitorsisnotnecessarynorusedtoensurethesafeshutdownoftheunitevenifapressurizersafetyvalveisopenedorstuckopenduringanemergencysituation,webelievethataplantshutdownduetoaninoperableacousticmonitorwouldbeunwarranted.JustificationforProosedTechnicalSecificationChanesFortheremovalofthefootnotesandreferencestothefootnotes,theoperatingcyclesforwhichthefootnoteswerevalidhavebeenconcluded.Therefore,thefootnotesarenolongerapplicableandshouldberemoved.Forthereductionintheminimumnumberofchannelsoper'ablefromonepervalvetotwooutofthreetotal,first,thetemperaturesensorinstalleddownstreamofeachpressurizersafetyvalveprovidesindicationandalarmonboththecontrolroompanelandtheplantcomputer.Pastexperiencehasshownthesetemperaturesensorstobeeffectiveleakdetectiondevices.Inaddition,thepressurizersafetyvalvepositionindicatoracousticmonitoringsystemhasshowninthepastthatwhenoneofthepressurizersafetyvalvesopens,all-threesafetyvalvepositionindicatoracousticmonitorchannelsareactuated.Thisiscausedbythesensitivityoftheaccelerometersandthefactthatthethreesafetyvalvesandtheirassociatedacousticmonitorsensorsareincloseproximitytoeachotherandtiedtogetherthroughcommonpiping.Thus,ifthepressurizersafetyvalveassociatedwiththeinoperablepositionindicatoracousticmonitorchanneldischarges,theremainingtwopositionindicatoracousticmonitorchannelswouldalerttheoperator,Anadditionalbenefittothiseffectisthatitalsoenablestheoperatortodiscriminateavalidalarmindicationfromaninvalidalarmindication.Otherinstrumentationexiststhatprovidestheoperatorwithindicationofpressurizersafetyvalveactuation.Thepressurizersafetyvalvesdischargeintothepressurizerrelieftank.Thetemperature,pressure,andliquidlevelofthetankareindicatedandalarmedinthecontrolroom.Achangeintheseparameterswouldalarmandalerttheoperatorofasafetyvalvedischarge.condition.
3.1UNIT1Weareproposing tomakethefollowing changestotheUnit1-"""Technical Specifications.
Attachment1toAEP:NRC:1170DPage5Finally,inanemergencysituation,theoperatordoesnotuseasignalfromthepressurizersafetyvalvepositionindicatoracousticmonitorsasanactioninitiator.Theoperatorrespondstootherindicationsoflossofreactorcoolantinventory.As'theoperatordoesnothavedirectcontrolofthepressurizersafetyvalve,"where"thelossofinventoryisoccurringisoflessimportancethancompensatingforthelossofinventory.Inaddition,theCookNuclearPlantemergencyoperatingproceduresdonotreferencethepressurizersafetyvalvepositionindicatoracousticmonitors.5.0NOSIGNIFICANTHAZARDSDETERMINATIONWehaveevaluatedtheproposedT/Ssexemptionandhavedeterminedthatitshouldnotrequireasignificanthazardsconsiderationbasedonthecriteriaestablishedin10CFR50.92(c).OperationoftheCookNuclearPlantinaccordancewiththeproposedamendmentwillnot:(1)Involveasinificantincreaseintherobabilitorconseuencesofanaccidentreviouslevaluated.Althoughtheproposedexemptionresultsintheoperatorhavingonelesssourceofinformationonplantstatus,itdoesnotcreateasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.Theacousticmonitorsdonotperformafunctionvitaltosafeshutdownortotheisolationofthereactor,orthereactorcoolantsystempressureboundary,noristhereamechanisminvolvinganoperableorinoperablepressurizersafetyvalveacousticmonitorwhichwouldinitiateanaccident.ThesemonitorswereaddedtomeettherequirementsofNUREG-0578andNUREG-0737.Duringnormaloperations,otherinstrumentationexiststhatprovidestheoperatorwithindicationofsafetyvalveactuation.Theacousticmonitorsarenotnecessarytoandarenotusedintheemergencyoperatingprocedures.Inaddition,theacousticmonitorsbeinginoperablewillnotresultinanuncontrolledreleaseofradiationtotheenvironmentandwillnotinitiateanaccident.Finally,althoughtheoperatormayhaveonelesschanneloperable,theoperatorreceivesnolessinformationthanifallthreechannelsareoperablebecause"onevalveopeningcausesalloperablechannelstoactuateTherefore,weconcludethattheproposedT/Sschangesdonotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.(2)Createtheossibilitofanewordifferentkindofaccidentfromanreviouslanalzed.Aspreviouslystated,thepurposeoftheacousticmonitoris'toprovidetheoperatorwithinformationregardingsafetyvalveposition EtCII' Attachment1toAEP:NRC:1170DPage6thatmayassistinthemitigationoftheconsequencesofanaccident.Specifically,itprovidesinformationthatasafetyvalvehaslifted.However,theoperatorhasothermechanismsforobtainingequivalentinformation.Inaddition,thesignalsgeneratedbyanacousticmonitordonotinitiateanyotherequipmentactuation,norwilltheinoperabilityofanacousticmonitorinitiateanyaccident.Consequently,theproposedT/Sschangesdonotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyanalyzed.(3)InvolveasinificantreductioninamarinofsafetTheproposedT/Sschangesresultintheoperatorpotentiallyhavingonelesssourceofinformationonplantstatus.However,webelievethemarginofsafetyisnotreducedforseveralreasons.First,theoperatorisprovidedwithotherviableflowdetectiondevicestodeterminepressurizersafetyvalveposition,i.e.,thetemperaturesensoronthedischargelineassociatedwiththeinoperableacousticmonitor,andpressurizerrelieftanklevel(NLA-351),temperature(NTA-351)andpressure(NPA-351)indications.Also,theacousticmonitorsarenotusedbytheoperatorsinanemergencysituation,as.theoperatorreliesonotherindicationsoflossofreactorcoolantinventorypertheemergencyoperatingprocedures.Inaddition,previousexperiencewithth'epressurizersafetyvalvepositionindicatoracousticmonitoringsystemhasshownthat,whenanyoneofthepressurizersafetyvalvesopens,allthreesafetyvalvepositionindicatoracousticmonitorsareactuated.Becauseofthis,theoperatorreceivesnolessinformationregardlessifonlytwoorthreechannelsareoperable.Basedontheabove,webelievethathavinganacousticmonitorinoperabledoesnotwarrantreactorandplantshutdown.AstheT/Ssarecurrentlystated,shouldonepressurizersafetyvalvepositionindicatoracousticmonitorbecomeinoperable,itmustberestoredtooperablestatuswithinthirtydaysortheunitmustbeinhotshutdownwithinthesubsequenttwelvehours.Thermalcyclingfromunwarrantedplantshutdownsincreasesthelikelihoodofreactorvesselembrittlementandunnecessarilychallengesthesafetysystems.Becauseasignalfromthepressurizersafetyvalvepositionindicatoracousticmonitorsisnotnecessarynorusedtoensurethesafeshutdownoftheunitevenifapressurizersafetyvalveisopenedorstuckopenduringanemergencysituation,webelievethataplantshutdownduetoaninoperableacousticmonitorwouldbeunwarranted.WebelievethattheunitcanbeoperatedsafelyandthatwewouldstillmeettheintentofNUREG-0538andNUREG-0737withonlytwooutofthreepressurizersafetyvalvepositionindicatoracousticmonitorsoperable.
ReviseTable33-11"Post-Accident Monitorin Instrumentation" Currently, Instrument 14ofTable3.3-11hasanexception denotedbya*****footnote.
Attachment1toAEP:NRC:1170DPage76.0PENDINGTSsPROPOSALSIMPACTINGTHISSUBMITTALThereiscurrentlyoneotherT/Ssproposalunderreviewthatimpactsthissubmittal.InoursubmittalAEP:NRC:1137,datedFebruary15,1991,changesareproposedtoUnit1T/Spage3/43-55andUnit2T/Spage3/43-46.Thechangesproposedinthissubmittal(AEP:NRC:1170D)aretobemadeinadditiontothoseinAEP:NRC:1137.
Weareproposing todeletethisfootnote.
ROH-ORVS41SV-55ASV-45BSV-4SCPRESSUR12ER/UPTURNDLSCSPRESSURlZggRELIEFTANK}}
Also,Instrument 14ofTable3.3-11requiresthatasaminimum,onechannelpervalvebeoperable.
Weareproposing tochangethistorequirethat,asaminimum,twooutofthreechannelstotalbeoperable.
3.2UNIT2Weareproposing tomakethefollowing changestotheUnit2Technical Specifications.
ReviseTable33-10"Post-Accident Monitorin Instrumentation" Currently, Instrument 14ofTable3.3-10hasanexception denotedbya*****footnote.
Weareproposing todeletethisfootnote.
Attachment 1toAEP:NRC:1170D Page2Also,Instrument 14ofTable3.3-10requiresthat,asaminimum,onechannelpervalvebeoperable.
Weareproposing tochangethistorequirethat,asaminimum,twooutofthreechannelstotalbeoperable.
 
==4.0 DISCUSSION==
SstemDescritionThereactorcoolantsystemisprotected againstoverpressurization bycontrolandprotective
: circuits, suchasthepressurizer pressurehighreactortrip,andbythethreepower-operated reliefandthreesafetyvalvesconnected tothetopofthepressurizer.
Uponopening,thesevalvesdischarge steamintothepressurizer relieftank,whichcondenses andcollectsthevalveeffluent.
Thissubmittal addresses themonitoring instrumentation associated withthepressurizer safetyvalvesandthepressurizer relieftank.Thepurposeoftheacousticmonitorsistoprovidetheoperatorwithinformation regarding safetyvalvepositionduringpost-accident conditions.
Twoindependent monitoring systemsexistthatalerttheoperatortothepassageofsteamthroughthesafetyvalvesduetovalvelift.Inoneoftheindependent monitoring systems,anacousticmonitor(QR-107A, B,andC)onthedischarge ofeachsafetyvalvedetectsacousticvibrations generated fromthesteamflowingthroughthepressurizer safetyvalve,andactuatesanalarmandprovidesavisualdisplayofpercentage offullflowinthecontrolroom.Duetothemagnitude oftheacousticvibrations andthesensitivity oftheinstrumentation, allthreemonitorswilldetecttheopeningofanyoneofthethreepressurizer safetyvalves.Theacousticmonitorswereaddedtomeettherequirements ofNUREG-0578, "TMI-2LessonsLearnedTaskForceStatusReportandShortTermRecommendations,"
andNUREG-0737, "Clarification ofTMIActionPlanRequirements,"
andareenvironmentally qualified.
Duringnormaloperation theacousticmonitorsarenotusedtodetectpressurizer safetyvalveleakage.Intheotherindependent monitoring system,atemperature sensor(NTA-151,
-152,-153)downstream oftheacousticsensorgenerates asignalthatactuatesacontrolroomalarmwhenatemperature increaseisexperienced intheline,aswouldbethecaseifthepressurizer safetyvalvereleasedsteam.Theattachedsimplified diagramillustrates thisportionofthesystem.Indications ofthetemperature, pressureandwaterlevelofthepressurizer safetyrelieftankarealsoprovidedinthecontrolroomandprovideadditional indication ofpressurizer safetyvalveleakageduringnormaloperation.
Thetemperature ofthewater Attachment 1toAEP:NRC:1170D Page3inthepressurizer relieftankismeasuredandindicated byinstrument numberNTA-351.Analarmresulting fromthissignalisactuatedbyhigh~atertemperature, andinformstheoperatorthatcoolingofthe"pressurizer relieftankcontentsisrequired.
Thepressurizer relieftankpressuretransmitter (NPA-351) operatesahighandlowpressurealarm.Thepressurizer relieftankleveltransmitter (NLA-351) providesasignalforalevelindication andahighandlowtanklevelalarms.Consequently, adischarge fromoneofthepressurizer safetyvalveswillcausetheseinstruments toprovideanalarmindication inthecontrolroom.Alldownstream temperature,
: pressure, andtanklevelindications arenotenvironmentally qualified.
Inanemergency situation, theoperatordoesnotuseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsas,anactioninitiator.
Theoperatorrespondstootherindications oflossofreactorcoolantinventory.
Astheoperatordoesnothavedirectcontrolofthepressurizer safetyvalve,"where"thelossofinventory isoccurring isoflessimportance thancompensating forthelossofinventory.
Inaddition, theCookNuclearPlantemergency operating procedures donotreference thepressurizer safetyvalvepositionindicator acousticmonitorsforthereasonstatedabove.ReasonforProosedTechnical Secification ChaneReuestTherequesttoremovethefootnotes andreferences tothefootnotes ismadeinordertoclarifytheTechnical Specifications andtoremoveunnecessary information.
Withregardtochangingtheminimumnumberofoperablechannelsfromonepervalvetotwooutofthreetotal,inlettersAEP:NRC:1170 datedDecember16,1991andAEP:NRC:1170B datedJanuary22,1992,amendments wererequested totheUnit2andUnit1Technical Specifications, respectively, tointroduce the*****footnotes whichareproposedtobedeletedbythisletter.Theserequestsweremadeonanexpedited basistoprecludeanunwarranted shutdownofeachreactorunit.Webelievethereliefthatwasgrantedonatemporary basiscanbesafelyimplemented onapermanent basis.Sincemostofthepressurizer safetyvalvepositionindicator acousticmonitorsystemisinaccessible duringpoweroperation, thishastheadvantage ofpotentially eliminating theneedforplantshutdownorforexpedited oremergency T/Sreliefshouldanacousticmonitorbecomeinoperable inthefuture.Webelievethathavinganacousticmonitorinoperable doesnotwarrantreactorandplantshutdown.
AstheT/Ssarecurrently stated,shouldonepressurizer safetyvalvepositionindicator 4
Attachment 1toAEP:NRC:1170D Page4acousticmonitorbecomeinoperable, itmustberestoredtooperablestatuswithinthirtydaysortheunitmustbeinhotshutdownwithinthesubsequent twelvehours.Thermalcyclingfromunwarranted plantshutdowns increases thelikelihood ofreactorvesselfatiguestresscyclesandunnecessarily challenges thesafetysystems.Becauseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsisnotnecessary norusedtoensurethesafeshutdownoftheunitevenifapressurizer safetyvalveisopenedorstuckopenduringanemergency situation, webelievethataplantshutdownduetoaninoperable acousticmonitorwouldbeunwarranted.
Justification forProosedTechnical Secification ChanesFortheremovalofthefootnotes andreferences tothefootnotes, theoperating cyclesforwhichthefootnotes werevalidhavebeenconcluded.
Therefore, thefootnotes arenolongerapplicable andshouldberemoved.Forthereduction intheminimumnumberofchannelsoper'able fromonepervalvetotwooutofthreetotal,first,thetemperature sensorinstalled downstream ofeachpressurizer safetyvalveprovidesindication andalarmonboththecontrolroompanelandtheplantcomputer.
Pastexperience hasshownthesetemperature sensorstobeeffective leakdetection devices.Inaddition, thepressurizer safetyvalvepositionindicator acousticmonitoring systemhasshowninthepastthatwhenoneofthepressurizer safetyvalvesopens,all-threesafetyvalvepositionindicator acousticmonitorchannelsareactuated.
Thisiscausedbythesensitivity oftheaccelerometers andthefactthatthethreesafetyvalvesandtheirassociated acousticmonitorsensorsareincloseproximity toeachotherandtiedtogetherthroughcommonpiping.Thus,ifthepressurizer safetyvalveassociated withtheinoperable positionindicator acousticmonitorchanneldischarges, theremaining twopositionindicator acousticmonitorchannelswouldalerttheoperator, Anadditional benefittothiseffectisthatitalsoenablestheoperatortodiscriminate avalidalarmindication fromaninvalidalarmindication.
Otherinstrumentation existsthatprovidestheoperatorwithindication ofpressurizer safetyvalveactuation.
Thepressurizer safetyvalvesdischarge intothepressurizer relieftank.Thetemperature,
: pressure, andliquidlevelofthetankareindicated andalarmedinthecontrolroom.Achangeintheseparameters wouldalarmandalerttheoperatorofasafetyvalvedischarge
.condition.
Attachment 1toAEP:NRC:1170D Page5Finally,inanemergency situation, theoperatordoesnotuseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsasanactioninitiator.
Theoperatorrespondstootherindications oflossofreactorcoolantinventory.
As'theoperatordoesnothavedirectcontrolofthepressurizer safetyvalve,"where"thelossofinventory isoccurring isoflessimportance thancompensating forthelossofinventory.
Inaddition, theCookNuclearPlantemergency operating procedures donotreference thepressurizer safetyvalvepositionindicator acousticmonitors.
 
==5.0 NOSIGNIFICANT==
HAZARDSDETERMINATION Wehaveevaluated theproposedT/Ssexemption andhavedetermined thatitshouldnotrequireasignificant hazardsconsideration basedonthecriteriaestablished in10CFR50.92(c).
Operation oftheCookNuclearPlantinaccordance withtheproposedamendment willnot:(1)Involveasinificantincreaseintherobabilit orconseuencesofanaccidentreviouslevaluated.
Althoughtheproposedexemption resultsintheoperatorhavingonelesssourceofinformation onplantstatus,itdoesnotcreateasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.
Theacousticmonitorsdonotperformafunctionvitaltosafeshutdownortotheisolation ofthereactor,orthereactorcoolantsystempressureboundary, noristhereamechanism involving anoperableorinoperable pressurizer safetyvalveacousticmonitorwhichwouldinitiateanaccident.
Thesemonitorswereaddedtomeettherequirements ofNUREG-0578 andNUREG-0737.Duringnormaloperations, otherinstrumentation existsthatprovidestheoperatorwithindication ofsafetyvalveactuation.
Theacousticmonitorsarenotnecessary toandarenotusedintheemergency operating procedures.
Inaddition, theacousticmonitorsbeinginoperable willnotresultinanuncontrolled releaseofradiation totheenvironment andwillnotinitiateanaccident.
Finally,althoughtheoperatormayhaveonelesschanneloperable, theoperatorreceivesnolessinformation thanifallthreechannelsareoperablebecause"one valveopeningcausesalloperablechannelstoactuateTherefore, weconcludethattheproposedT/Sschangesdonotinvolveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.
(2)Createtheossibilit ofanewordifferent kindofaccidentfromanreviouslanalzed.Aspreviously stated,thepurposeoftheacousticmonitoris'toprovidetheoperatorwithinformation regarding safetyvalveposition EtCII' Attachment 1toAEP:NRC:1170D Page6thatmayassistinthemitigation oftheconsequences ofanaccident.
Specifically, itprovidesinformation thatasafetyvalvehaslifted.However,theoperatorhasothermechanisms forobtaining equivalent information.
Inaddition, thesignalsgenerated byanacousticmonitordonotinitiateanyotherequipment actuation, norwilltheinoperability ofanacousticmonitorinitiateanyaccident.
Consequently, theproposedT/Sschangesdonotcreatethepossibility ofanewordifferent kindofaccidentfromanypreviously analyzed.
(3)Involveasinificantreduction inamarinofsafetTheproposedT/Sschangesresultintheoperatorpotentially havingonelesssourceofinformation onplantstatus.However,webelievethemarginofsafetyisnotreducedforseveralreasons.First,theoperatorisprovidedwithotherviableflowdetection devicestodetermine pressurizer safetyvalveposition, i.e.,thetemperature sensoronthedischarge lineassociated withtheinoperable acousticmonitor,andpressurizer relieftanklevel(NLA-351),
temperature (NTA-351) andpressure(NPA-351) indications.
Also,theacousticmonitorsarenotusedbytheoperators inanemergency situation, as.theoperatorreliesonotherindications oflossofreactorcoolantinventory pertheemergency operating procedures.
Inaddition, previousexperience withth'epressurizer safetyvalvepositionindicator acousticmonitoring systemhasshownthat,whenanyoneofthepressurizer safetyvalvesopens,allthreesafetyvalvepositionindicator acousticmonitorsareactuated.
Becauseofthis,theoperatorreceivesnolessinformation regardless ifonlytwoorthreechannelsareoperable.
Basedontheabove,webelievethathavinganacousticmonitorinoperable doesnotwarrantreactorandplantshutdown.
AstheT/Ssarecurrently stated,shouldonepressurizer safetyvalvepositionindicator acousticmonitorbecomeinoperable, itmustberestoredtooperablestatuswithinthirtydaysortheunitmustbeinhotshutdownwithinthesubsequent twelvehours.Thermalcyclingfromunwarranted plantshutdowns increases thelikelihood ofreactorvesselembrittlement andunnecessarily challenges thesafetysystems.Becauseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsisnotnecessary norusedtoensurethesafeshutdownoftheunitevenifapressurizer safetyvalveisopenedorstuckopenduringanemergency situation, webelievethataplantshutdownduetoaninoperable acousticmonitorwouldbeunwarranted.
WebelievethattheunitcanbeoperatedsafelyandthatwewouldstillmeettheintentofNUREG-0538 andNUREG-0737 withonlytwooutofthreepressurizer safetyvalvepositionindicator acousticmonitorsoperable.
Attachment 1toAEP:NRC:1170D Page76.0PENDINGTSsPROPOSALS IMPACTING THISSUBMITTAL Thereiscurrently oneotherT/Ssproposalunderreviewthatimpactsthissubmittal.
Inoursubmittal AEP:NRC:1137, datedFebruary15,1991,changesareproposedtoUnit1T/Spage3/43-55andUnit2T/Spage3/43-46.Thechangesproposedinthissubmittal (AEP:NRC:1170D) aretobemadeinadditiontothoseinAEP:NRC:1137.
ROH-ORVS41SV-55ASV-45BSV-4SCPRESSUR12ER/UPTURNDLSCSPRESSURlZgg RELIEFTANK}}

Revision as of 07:35, 29 June 2018

Application for Amends to Licenses DPR-58 & DPR-74,modifying Unit 1 TS 3.3.3.8,Table 3.3-11 & Unit 2 TS 3.3.3.6,Table 3.3-10 to Change Min Channels Required to Be Operable for Safety Valve Position Indicator Acoustic Monitor
ML17329A583
Person / Time
Site: Cook  American Electric Power icon.png
Issue date: 08/12/1992
From: FITZPATRICK E
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To: MURLEY T E
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17329A584 List:
References
AEP:NRC:1170D, NUDOCS 9208180194
Download: ML17329A583 (19)
v • d • e


Text

.ACCELERATED DIQGBUTION DEMONSTPTIONSYSTEMREGULATORY INFORMATION DISTRIBUTION STEN(BIDS)P!ACCESSXQN NBR:9206180194 DGC.DATE:92/08/12NOTARIZED:

YESDOCKET(I:FACXL:50-31,5DonaldC.CookNuclearPoeerPlant'nitiiIndiana80500031550-316DonaldC.CookNuclearPowerPlantiUnit2.XndianaN05000316AUTH.NANEAUTHORAFFILIATXGN FITZPATRICK'.

IndianaNichiganPoeerCo.(formerly Indiana5NichiganEleRECIP.NAXERECXrXENTAFFILIATION NURLEYiT.E.DocumentControlBranch(Document ControlDesk3

SUBJECT:

Application foramendstoLicensesDPR-58ZcDPR-74>modifying Unit1TS3.3.3.8.Table3.3-115Unit2TS3.3.3.6>Table3.3-10tochangeminchannelsrequiredtobeoperableforsafettIvalvepositionindicator acousticmonitor.DISTRIBUTION CODE:A001DCOPIESRECEIVED:

LTRiENCLjSIZE:TITLE:ORSubmittal:

GeneralDistribution DNOTES:RECIPIENTIDCODE/NAI"!E PD3-1LASTANGiJINTERMAL:NRR/DET/ESGB NRR/DST/SELB 7ENRR/DST/SRXB BEGC/FXLE01COPIESLTTRENCL1122111110,RECIPIENT IDCODE/N*NE PD3-1PDNRR/DOEA/QTSB11 NRR/DST/6 ICBSH7NUDGCS-ABSTRACT OGC/HDS2RES/DSXR/EXB COPIESLTTRENCL11111011DDEXTERNAL:

NRCPDRDNOTETOALL"RIDS"RECIPIENTS:

DPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMP1-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMEPWS YOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:

LTTRibENCL14 C~,l IndianaMichiganPowerCompanyP.O.Box16631Columbus, OH43216AEP:NRC:1170D DonaldC.CookNuclearPlantUnits1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74UNITS1AND2PRESSURIZER SAFETYVALVEPOSITIONINDICATOR ACOUSTICMONITORTECHNICAL SPECIFICATION AMENDMENT REQUESTU.S.NuclearRegulatory Commission DocumentControlDeskWashington, D.C.20555Attn:T.E.MurleyAugust12,1992DearDr.Murley;Thisletteranditsattachments constitute anapplication forTechnical Specifications (T/Ss)changesforDonaldC.CookNuclearPlantUnits1and2.Specifically, weareproposing tomodifyUnit1T/S3.3.3.8Table3.3-11andUnit2T/S3.3.3.6Table3.3-10tochangetheminimumchannelsoperableforthepressurizer safetyvalvepositionindicator acousticmonitor(Instrument 14)totwooutofthreetotalfromonepervalve.Wearealsoproposing toremovethe*****footnotes andreferences tothe*****footnotes thatwereaddedduringthepreviousoperating cycleforeachunitandarenolongerineffect.Attachment 1providesadetaileddescription oftheproposedchanges,thejustification forthechanges,andourproposeddetermination ofnosignificant hazardsconsideration performed pursuantto10CFR50.92(c).

Attachment 2containstheexistingT/Sspagesmarkedtoreflecttheproposedchanges.Attachment 3containstheproposedT/Sspages.TheproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee andbytheNuclearSafetyandDesignReviewCommittee.

Incompliance withtherequirements of10CFR50.91(b)(1),

copiesofthisletteranditsattachments havebeentransmitted toMr.J.R.PadgettoftheMichiganPublicServiceCommission andtotheMichiganDepartment ofPublicHealth.;9208i80194 9208i2'i>"I~DR,ADOCK050003i5P",PDR ll Dr.T.E.Hurley-2-AEP:NRC:1170D Thisletterissubmitted pursuantto10CFR50.54(f)and,assuch,anoathofaffirmation isenclosed.

Sincerely, E.E.FitzpatickVicePresident dagEnclosure Attachments cc:D.H.Williams, Jr.A.A.Blind-BridgmanJ.R.PadgettG.CharnoffNFEHSectionChiefA.B.Davis-RegionIIINRCResidentInspector

-Bridgman COUNTYOFFRANKLINE.E.Fitzpatrick, beingdulysworn,deposesandsaysthatheistheVicePresident oflicensee, IndianaMichiganPowerCompany,thathehasreadtheforgoingUnits1and2Pressurizer SafetyValvePositionIndicator AcousticMonitorTechnical Specification Amendment Request,andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledge andbelief.Subscribed sndsworntobeforemethislasrdayof19~(NOTARYUBLIC

Attachment 1toAEP:NRC:1170D 10CFR50.92 Determination forProposedChangestotheDonaldC.CookNuclearPlantUnits1and2Technical Specifications Attachment 1toAEP:NRC:1170D Page11.0SECTIONSTOBECHANGEDUnit1:Table3.3-11ofTechnical Specification (T/S)3.3.3.8.Unit2:Table3.3-10'ofTechnical Specification (T/S)3.3.3.6.2.0EXTENTOFCHANGESWeareproposing tochangetheminimumnumberofchannelsoperableforthepressurizer safetyvalvepositionindicator acousticmonitors(Instrument 14inUnit1T/STable3.3-11andUnit2T/STable3.3-10)fromonepervalvetotwooutofthreetotal.Wearealsoproposing todeletethe*****footnotes andreferences tothe*****footnotes inthesametablesbecausethereferenced operating cyclehasbeencompleted andtheyarenolongerapplicable.

3.0 CHANGESREUESTEDIdentical

changesarebeingsoughtforboththeUnit1andUnit2Technical Specifications.

3.1UNIT1Weareproposing tomakethefollowing changestotheUnit1-"""Technical Specifications.

ReviseTable33-11"Post-Accident Monitorin Instrumentation" Currently, Instrument 14ofTable3.3-11hasanexception denotedbya*****footnote.

Weareproposing todeletethisfootnote.

Also,Instrument 14ofTable3.3-11requiresthatasaminimum,onechannelpervalvebeoperable.

Weareproposing tochangethistorequirethat,asaminimum,twooutofthreechannelstotalbeoperable.

3.2UNIT2Weareproposing tomakethefollowing changestotheUnit2Technical Specifications.

ReviseTable33-10"Post-Accident Monitorin Instrumentation" Currently, Instrument 14ofTable3.3-10hasanexception denotedbya*****footnote.

Weareproposing todeletethisfootnote.

Attachment 1toAEP:NRC:1170D Page2Also,Instrument 14ofTable3.3-10requiresthat,asaminimum,onechannelpervalvebeoperable.

Weareproposing tochangethistorequirethat,asaminimum,twooutofthreechannelstotalbeoperable.

4.0 DISCUSSION

SstemDescritionThereactorcoolantsystemisprotected againstoverpressurization bycontrolandprotective

circuits, suchasthepressurizer pressurehighreactortrip,andbythethreepower-operated reliefandthreesafetyvalvesconnected tothetopofthepressurizer.

Uponopening,thesevalvesdischarge steamintothepressurizer relieftank,whichcondenses andcollectsthevalveeffluent.

Thissubmittal addresses themonitoring instrumentation associated withthepressurizer safetyvalvesandthepressurizer relieftank.Thepurposeoftheacousticmonitorsistoprovidetheoperatorwithinformation regarding safetyvalvepositionduringpost-accident conditions.

Twoindependent monitoring systemsexistthatalerttheoperatortothepassageofsteamthroughthesafetyvalvesduetovalvelift.Inoneoftheindependent monitoring systems,anacousticmonitor(QR-107A, B,andC)onthedischarge ofeachsafetyvalvedetectsacousticvibrations generated fromthesteamflowingthroughthepressurizer safetyvalve,andactuatesanalarmandprovidesavisualdisplayofpercentage offullflowinthecontrolroom.Duetothemagnitude oftheacousticvibrations andthesensitivity oftheinstrumentation, allthreemonitorswilldetecttheopeningofanyoneofthethreepressurizer safetyvalves.Theacousticmonitorswereaddedtomeettherequirements ofNUREG-0578, "TMI-2LessonsLearnedTaskForceStatusReportandShortTermRecommendations,"

andNUREG-0737, "Clarification ofTMIActionPlanRequirements,"

andareenvironmentally qualified.

Duringnormaloperation theacousticmonitorsarenotusedtodetectpressurizer safetyvalveleakage.Intheotherindependent monitoring system,atemperature sensor(NTA-151,

-152,-153)downstream oftheacousticsensorgenerates asignalthatactuatesacontrolroomalarmwhenatemperature increaseisexperienced intheline,aswouldbethecaseifthepressurizer safetyvalvereleasedsteam.Theattachedsimplified diagramillustrates thisportionofthesystem.Indications ofthetemperature, pressureandwaterlevelofthepressurizer safetyrelieftankarealsoprovidedinthecontrolroomandprovideadditional indication ofpressurizer safetyvalveleakageduringnormaloperation.

Thetemperature ofthewater Attachment 1toAEP:NRC:1170D Page3inthepressurizer relieftankismeasuredandindicated byinstrument numberNTA-351.Analarmresulting fromthissignalisactuatedbyhigh~atertemperature, andinformstheoperatorthatcoolingofthe"pressurizer relieftankcontentsisrequired.

Thepressurizer relieftankpressuretransmitter (NPA-351) operatesahighandlowpressurealarm.Thepressurizer relieftankleveltransmitter (NLA-351) providesasignalforalevelindication andahighandlowtanklevelalarms.Consequently, adischarge fromoneofthepressurizer safetyvalveswillcausetheseinstruments toprovideanalarmindication inthecontrolroom.Alldownstream temperature,

pressure, andtanklevelindications arenotenvironmentally qualified.

Inanemergency situation, theoperatordoesnotuseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsas,anactioninitiator.

Theoperatorrespondstootherindications oflossofreactorcoolantinventory.

Astheoperatordoesnothavedirectcontrolofthepressurizer safetyvalve,"where"thelossofinventory isoccurring isoflessimportance thancompensating forthelossofinventory.

Inaddition, theCookNuclearPlantemergency operating procedures donotreference thepressurizer safetyvalvepositionindicator acousticmonitorsforthereasonstatedabove.ReasonforProosedTechnical Secification ChaneReuestTherequesttoremovethefootnotes andreferences tothefootnotes ismadeinordertoclarifytheTechnical Specifications andtoremoveunnecessary information.

Withregardtochangingtheminimumnumberofoperablechannelsfromonepervalvetotwooutofthreetotal,inlettersAEP:NRC:1170 datedDecember16,1991andAEP:NRC:1170B datedJanuary22,1992,amendments wererequested totheUnit2andUnit1Technical Specifications, respectively, tointroduce the*****footnotes whichareproposedtobedeletedbythisletter.Theserequestsweremadeonanexpedited basistoprecludeanunwarranted shutdownofeachreactorunit.Webelievethereliefthatwasgrantedonatemporary basiscanbesafelyimplemented onapermanent basis.Sincemostofthepressurizer safetyvalvepositionindicator acousticmonitorsystemisinaccessible duringpoweroperation, thishastheadvantage ofpotentially eliminating theneedforplantshutdownorforexpedited oremergency T/Sreliefshouldanacousticmonitorbecomeinoperable inthefuture.Webelievethathavinganacousticmonitorinoperable doesnotwarrantreactorandplantshutdown.

AstheT/Ssarecurrently stated,shouldonepressurizer safetyvalvepositionindicator 4

Attachment 1toAEP:NRC:1170D Page4acousticmonitorbecomeinoperable, itmustberestoredtooperablestatuswithinthirtydaysortheunitmustbeinhotshutdownwithinthesubsequent twelvehours.Thermalcyclingfromunwarranted plantshutdowns increases thelikelihood ofreactorvesselfatiguestresscyclesandunnecessarily challenges thesafetysystems.Becauseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsisnotnecessary norusedtoensurethesafeshutdownoftheunitevenifapressurizer safetyvalveisopenedorstuckopenduringanemergency situation, webelievethataplantshutdownduetoaninoperable acousticmonitorwouldbeunwarranted.

Justification forProosedTechnical Secification ChanesFortheremovalofthefootnotes andreferences tothefootnotes, theoperating cyclesforwhichthefootnotes werevalidhavebeenconcluded.

Therefore, thefootnotes arenolongerapplicable andshouldberemoved.Forthereduction intheminimumnumberofchannelsoper'able fromonepervalvetotwooutofthreetotal,first,thetemperature sensorinstalled downstream ofeachpressurizer safetyvalveprovidesindication andalarmonboththecontrolroompanelandtheplantcomputer.

Pastexperience hasshownthesetemperature sensorstobeeffective leakdetection devices.Inaddition, thepressurizer safetyvalvepositionindicator acousticmonitoring systemhasshowninthepastthatwhenoneofthepressurizer safetyvalvesopens,all-threesafetyvalvepositionindicator acousticmonitorchannelsareactuated.

Thisiscausedbythesensitivity oftheaccelerometers andthefactthatthethreesafetyvalvesandtheirassociated acousticmonitorsensorsareincloseproximity toeachotherandtiedtogetherthroughcommonpiping.Thus,ifthepressurizer safetyvalveassociated withtheinoperable positionindicator acousticmonitorchanneldischarges, theremaining twopositionindicator acousticmonitorchannelswouldalerttheoperator, Anadditional benefittothiseffectisthatitalsoenablestheoperatortodiscriminate avalidalarmindication fromaninvalidalarmindication.

Otherinstrumentation existsthatprovidestheoperatorwithindication ofpressurizer safetyvalveactuation.

Thepressurizer safetyvalvesdischarge intothepressurizer relieftank.Thetemperature,

pressure, andliquidlevelofthetankareindicated andalarmedinthecontrolroom.Achangeintheseparameters wouldalarmandalerttheoperatorofasafetyvalvedischarge

.condition.

Attachment 1toAEP:NRC:1170D Page5Finally,inanemergency situation, theoperatordoesnotuseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsasanactioninitiator.

Theoperatorrespondstootherindications oflossofreactorcoolantinventory.

As'theoperatordoesnothavedirectcontrolofthepressurizer safetyvalve,"where"thelossofinventory isoccurring isoflessimportance thancompensating forthelossofinventory.

Inaddition, theCookNuclearPlantemergency operating procedures donotreference thepressurizer safetyvalvepositionindicator acousticmonitors.

5.0 NOSIGNIFICANT

HAZARDSDETERMINATION Wehaveevaluated theproposedT/Ssexemption andhavedetermined thatitshouldnotrequireasignificant hazardsconsideration basedonthecriteriaestablished in10CFR50.92(c).

Operation oftheCookNuclearPlantinaccordance withtheproposedamendment willnot:(1)Involveasinificantincreaseintherobabilit orconseuencesofanaccidentreviouslevaluated.

Althoughtheproposedexemption resultsintheoperatorhavingonelesssourceofinformation onplantstatus,itdoesnotcreateasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.

Theacousticmonitorsdonotperformafunctionvitaltosafeshutdownortotheisolation ofthereactor,orthereactorcoolantsystempressureboundary, noristhereamechanism involving anoperableorinoperable pressurizer safetyvalveacousticmonitorwhichwouldinitiateanaccident.

Thesemonitorswereaddedtomeettherequirements ofNUREG-0578 andNUREG-0737.Duringnormaloperations, otherinstrumentation existsthatprovidestheoperatorwithindication ofsafetyvalveactuation.

Theacousticmonitorsarenotnecessary toandarenotusedintheemergency operating procedures.

Inaddition, theacousticmonitorsbeinginoperable willnotresultinanuncontrolled releaseofradiation totheenvironment andwillnotinitiateanaccident.

Finally,althoughtheoperatormayhaveonelesschanneloperable, theoperatorreceivesnolessinformation thanifallthreechannelsareoperablebecause"one valveopeningcausesalloperablechannelstoactuateTherefore, weconcludethattheproposedT/Sschangesdonotinvolveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.

(2)Createtheossibilit ofanewordifferent kindofaccidentfromanreviouslanalzed.Aspreviously stated,thepurposeoftheacousticmonitoris'toprovidetheoperatorwithinformation regarding safetyvalveposition EtCII' Attachment 1toAEP:NRC:1170D Page6thatmayassistinthemitigation oftheconsequences ofanaccident.

Specifically, itprovidesinformation thatasafetyvalvehaslifted.However,theoperatorhasothermechanisms forobtaining equivalent information.

Inaddition, thesignalsgenerated byanacousticmonitordonotinitiateanyotherequipment actuation, norwilltheinoperability ofanacousticmonitorinitiateanyaccident.

Consequently, theproposedT/Sschangesdonotcreatethepossibility ofanewordifferent kindofaccidentfromanypreviously analyzed.

(3)Involveasinificantreduction inamarinofsafetTheproposedT/Sschangesresultintheoperatorpotentially havingonelesssourceofinformation onplantstatus.However,webelievethemarginofsafetyisnotreducedforseveralreasons.First,theoperatorisprovidedwithotherviableflowdetection devicestodetermine pressurizer safetyvalveposition, i.e.,thetemperature sensoronthedischarge lineassociated withtheinoperable acousticmonitor,andpressurizer relieftanklevel(NLA-351),

temperature (NTA-351) andpressure(NPA-351) indications.

Also,theacousticmonitorsarenotusedbytheoperators inanemergency situation, as.theoperatorreliesonotherindications oflossofreactorcoolantinventory pertheemergency operating procedures.

Inaddition, previousexperience withth'epressurizer safetyvalvepositionindicator acousticmonitoring systemhasshownthat,whenanyoneofthepressurizer safetyvalvesopens,allthreesafetyvalvepositionindicator acousticmonitorsareactuated.

Becauseofthis,theoperatorreceivesnolessinformation regardless ifonlytwoorthreechannelsareoperable.

Basedontheabove,webelievethathavinganacousticmonitorinoperable doesnotwarrantreactorandplantshutdown.

AstheT/Ssarecurrently stated,shouldonepressurizer safetyvalvepositionindicator acousticmonitorbecomeinoperable, itmustberestoredtooperablestatuswithinthirtydaysortheunitmustbeinhotshutdownwithinthesubsequent twelvehours.Thermalcyclingfromunwarranted plantshutdowns increases thelikelihood ofreactorvesselembrittlement andunnecessarily challenges thesafetysystems.Becauseasignalfromthepressurizer safetyvalvepositionindicator acousticmonitorsisnotnecessary norusedtoensurethesafeshutdownoftheunitevenifapressurizer safetyvalveisopenedorstuckopenduringanemergency situation, webelievethataplantshutdownduetoaninoperable acousticmonitorwouldbeunwarranted.

WebelievethattheunitcanbeoperatedsafelyandthatwewouldstillmeettheintentofNUREG-0538 andNUREG-0737 withonlytwooutofthreepressurizer safetyvalvepositionindicator acousticmonitorsoperable.

Attachment 1toAEP:NRC:1170D Page76.0PENDINGTSsPROPOSALS IMPACTING THISSUBMITTAL Thereiscurrently oneotherT/Ssproposalunderreviewthatimpactsthissubmittal.

Inoursubmittal AEP:NRC:1137, datedFebruary15,1991,changesareproposedtoUnit1T/Spage3/43-55andUnit2T/Spage3/43-46.Thechangesproposedinthissubmittal (AEP:NRC:1170D) aretobemadeinadditiontothoseinAEP:NRC:1137.

ROH-ORVS41SV-55ASV-45BSV-4SCPRESSUR12ER/UPTURNDLSCSPRESSURlZgg RELIEFTANK

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