ML17328A178

Application for Amends to Licenses DPR-58 & DPR-74,adding Tech Spec 4.0.4 Exemptions to 18-month Measurement of Hot Leg/Cold Leg Delta T

ML17328A178
Person / Time
Site:	Cook
Issue date:	09/22/1989
From:	ALEXICH M P INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	MURLEY T E NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17328A179	List: ML17328A178 ML17328A180
References
AEP:NRC:1102, NUDOCS 8910040208
Download: ML17328A178 (9)

Text

ACCEMRATEDD1~i~BUTIONDEMONSTRA.TIONSYSTEMREGULATOAOZNFORMATZONDISTRIBUTIONSTEM(RIDE)ACCESSIONNBR:8910040208DOC.DATE:89/09/22NOTARIZED:NODOCKETFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,Indiana60500031550-316DonaldC.CookNuclearPowerPlant,Unit2,Indiana605000316AUTH.NAMEAUTHORAFFILIATION.ALEXICH,M.P.IndianaMichiganPowerCo.(formerlyIndiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONMURLEY,T.E.DocumentControlBranch(DocumentControlDesk)

SUBJECT:

ApplicationforamendstoLicensesDPR-586DPR-74,addingTechSpec4.0.4exemptionsto18-monthmeasurements.DISTRIBUTIONCODE:AOOZDCOPIESRECEIVED:LTR4ENCL3SIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:INTERNAL:EXTERNAL:RECIPIENTIDCODE/NAMEPD3-1LAGIITTERFJ.NRR/DEST/ADS7ENRR/DEST/ICSBNRR/DEST/RSB8ENUDOCS-ABSTRACTOGC/HDS1.RES/DSIR/EIBLPDRNSICCOPIESLTTRENCL1,1551111111110111111RECIPIENTIDCODE/NAMEPD3-1PDNRR/DEST/ESB8DNRR/DEST/MTB9HNRR/DOEA/TSB11OCLGFILENRCPDRCOPIESLTTRENCL~11111,111101111NOZE'I0ALL'KIDS"RECIPIEÃIS:PLEASEHELPUSTOREDUCE,HASTEjCXÃIACT'THEDOQ3MENICGNZROLDESKSKXMP1-37(EXT.20079)KOEZZK2KEEKN3RMMEHKHDISTRIBUTIONLISTSFORDOC(2KNISYOUDOHFTNEED)TOTALNUMBEROFCOPIESREQUIRED:LTTR21ENCL19

t~~II~]indianaMichiganPowerCompanyP.O.Box16631Columbus,OH43216AEP:NRC:1102DonaldC.CookNuclearPlantUnits1and2LicenseNos.DPR-58andDPR-74DocketNos.50-135and50-316DELTATREACTORTRIPSTECHNICALSPECIFICATION4.0.4CHANGEU.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Attn:T.E.MurleySeptember22,1989

DearDr,

Murley:ThisletteranditsattachmentsconstituteanapplicationforamendmenttotheTechnicalSpecifications(T/Ss)fortheDonaldC.CookNuclearPlantUnits1and2.Specifically,weproposetoaddT/S4.0.4exemptionstothe18-monthmeasurementofhotleg-coldlegdeltaT.WeintendtoperformthemeasurementaspartofthecalibrationoftheovertemperatureandoverpowerdeltaTreactortripsrequiredbyT/STable4.3-1(ReactorTripSystemInstrumentationSurveillanceRequirements).ThereasonsfortheproposedchangesandouranalysesconcerningsignificanthazardsconsiderationsarecontainedinAttachment1tothisletter.TheproposedrevisedT/SpagesarecontainedinAttachment2.Webelievethattheproposedchangeswillnotresultin(1)asignificantchangeinthetypesofeffluentsorasignificantincreaseintheamountsofanyeffluentthatmaybereleasedoffsite,or(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.ThesechangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandtheNuclearSafetyandDesignReviewCommitteeattheirnextregularlyscheduledmeeting.Incompliancewiththerequirementsof10CFR50.92(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtoMr.R.C.CallenoftheMichiganPublicServiceCommissionandtheMichiganDepartmentofPublicHealth.89'1004020889'0922PDRADOCK05000315PPNU Dr.T.E.Murley-2-AEP:NRC:1102ThisdocumenthasbeenpreparedfollowingCorporateproceduresthatincorporateareasonablesetofcontrolstoensureitsaccuracyandcompletenesspriortosignaturebytheundersigned.Sincerely,M.P.AleichVicePresidentldpAttachmentscc:D.H.Williams,Jr.W.G.Smith,Jr.-BridgmanR.C.CallenG.CharnoffA.B.DavisNRCResidentInspector-BridgmanNFEMSectionChief

~~ATTACHMENT1TOAEP:NRC:1102REASONSAND10CFR50.92ANALYSESFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICALSPECIFICATIONS Attachment1toAEP:NRC:1102Page1Inthisletter,weareproposingtomodifytheT/S4.0.4exemptionsforthe18-monthcalibrationoftheovertemperatureandoverpowerdeltaTreactortripsrequiredbyT/STable4.3-1,FunctionalUnits7and8.ThesefunctionalunitscurrentlyhaveT/S4.0.4exemptionsfortheFdeltaIpenaltiesassociatedwiththeovertemperatureandoverpowerreactortripsviaNote9toTable4.3-1.WeareproposingtoaddaT/S4.0.4exemptionforthemeasurementofdeltaTtoNote9.SubmittalofthisproposedT/SchangefulfillsacommitmentmadeinUnit2licenseeeventreport(LER)89-10(Attachment3).DuringthelastUnit2refuelingoutage,allfoursteamgeneratorswerereplaced.DeltaTmeasurementsweretakenduringunitstartupandeventuallywereincorporatedintotheovertemperatureandoverpowerdeltaTchannelcalibrations.Previously,thefullpowerdeltaTvaluehadbeenassumedtobeafixednominalvalue.Thenewsteamgenerators,however,resultedinenoughofachangeinthedeltaTtoplacetheovertemperatureandoverpowerdeltaTchannelcalibrations,whichhadbeenperformedasrequiredpriortoentryintoMode2,outsidetheallowablerangeofT/STable2.2-1.BecausethedeltaTvaluecouldchangeovertimedue,forexample,tosteamgeneratortubepluggingorreactorcoolantpumpflowchanges,wecommittedtomeasuringdeltaTvaluesatthebeginningofeachcycleandadjustingtheovertemperatureandoverpowerdeltaTreactortripcalibrationsasnecessary.However,ourT/SspresentlyrequirethetripstobeoperableinModes1and2.T/S4.0.4prohibitsentryintoanoperationalmodeorotherspecifiedapplicabi11tyconditionunlessthesurveillancerequirementsassociatedwiththelimitingconditionforoperationhavebeenperformed.ThedeltaTmeasurementsmustbeperformedatfullpowersincetheovertemperatureandoverpowerdeltaTfunctionsaredefined(inTable2.2-1)asafunctionofthedeltaTatrated.thermalpower.WithoutanexemptiontotherequirementsofT/S4.0.4,theplantmaybeinliteralnoncompliancewiththeT/Ssbetweenthetimetheinitialcalibrationisperformed(priortoentryintoMode2)andthetimethedeltaTmeasurementsaretakenandtheinitialcalibrationrevised,asnecessary.Per10CFR50.92,aproposedamendmentwillnotinvolveasignificanthazardsconsiderationiftheproposedamendmentdoesnot:(1)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,(2)createthepossibilityofanewordifferentkindofaccidentfrom'anyaccidentpreviouslyanalyzedorevaluated,or,(3)involveasignificantreductioninamarginofsafety.

Attachment1toAEP:NRC:1102Page2Criterion1ThechangeisnecessarytoallowforpropercalibrationoftheovertemperatureandoverpowerdeltaTfunctionswithoutviolationofT/Srequirements.ThechangethereforecorrectsaninconsistencyinourpresentT/S,andmakestheT/Smoreaccuratelyreflect,thesystemdesign.SincethechangewillallowustomeasuredeltaTeachcycle,ratherthanassuminganominalvalue,thechangeshouldprovideanenhancementtoourcalibrationprocedure.Wethereforedonotexpectthechangetoinvolveasignificantincreaseintheprobabilityorconsequencesofapreviouslyevaluatedaccidentorsignificantlyreducethemarginofsafety.Criterion2Thechangeinvolvesnophysicalmodificationstotheplantnoranysignificantchangesinplantoperations.Therefore,thechangeshouldnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyanalyzedorevaluated.Criterion3SeeCriterion1above.WenotethattheCommissionhasprovidedguidanceconcerningthedeterminationofsignificanthazardsbyprovidingexamples(48FR14870)ofamendmentsconsiderednotlikelytoinvolvesignificanthazardsconsiderations.Thefirstexamplereferstochangesthatareadministrativeinnature:forexample,correctionoferrors.ThechangeissimilartothisexampleinthatthepresentT/SdoesnotreflectthefactthatdeltaTmeasurementsmustbetakenatfullpower.Thesixthexamplereferstochangeswhichmayresultinsomeincreasetotheprobabilityorconsequencesofapreviouslyanalyzedaccidentormayreduceinsomewayasafetymargin,butwheretheresultsofthechangearewithinacceptablelimits.Technically,thechangeprovidesrelieffromcurrentT/SrequirementsregardingoperabilityoftheovertemperatureandoverpowerdeltaTreactortrips.However,thechangewillallowmeasurementofthedeltaTvalueeachcycle,ratherthanassuminganominalvaluefordeltaT.Thisprovidesanenhancementtothecalibrationprocedure,andthereforeshouldincreaseratherthandecreasesafety.Basedontheabovediscussion,webelievetheexamplescitedarerelevantandthatthechangeshouldnotinvolvesignificanthazardsconsiderations.WearealsoproposingaminoreditorialchangetoNote9ofT/STable4.3-1.ThepresentNote9includesareferencetoNote1ofTable2.2-1.ThisreferstothefdeltaIpenaltyoftheovertemperaturedeltaT.TheinclusionofthedeltaTintheT/S4.0.4exemptionprovidedbyNote9wouldrequireexpansion'ofthe Attachment1toAEP:NRC:1102-Page3referencetoNotes3and4ofTable4.3-1,also.Ratherthanaddtheadditionalnotenumbers,weareproposingtomodifythereferencesothatitrefersgenerallytoTable2.2-1,ratherthantothespecificnotesofTable2,2-1.ThiswillavoidclutteringNote9withtheadditionalreferences.Thechangeispurelyadministrativeinnature,andthereforewillnotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,willnotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyanalyzedorevaluated,andwillnotinvolveasignificantreductioninamarginofsafety.

ATTACHMENT2TOAEP:NRC:1102PROPOSEDREVISEDTECHNICALSPECIFICATIONPAGES