ML17331B193

Application for Amends to Licenses DPR-58 & DPR-74,changing TS 3/4.1.3 to Increase Limit for Control Rod Misalignment at or Below 85% Rated Thermal Power. Control Rod Misalignment Analysis Encl

ML17331B193
Person / Time
Site:	Cook
Issue date:	01/17/1994
From:	FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	MURLEY T E NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17331B194	List: ML17331B193 ML17331B195 ML17331B196
References
AEP:NRC:1182, NUDOCS 9401270035
Download: ML17331B193 (12)

Text

'CCELERATEDDISTRIBUTIONDEMONSITIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)DOCKET0500031505000316DISTRIBUTIONCODEA001DCOPIESRECEIVEDLTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionACCESSIONNBR:9401270035DOC.DATE:94/01/17NOTAR1ZED:YESFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM50-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaMAUTH.NAMEAUTHORAFFILIATIONFITZPATRICK,E.IndianaMichiganPowerCo.(formerlyIn'a@a6iciganEleRECIP.NAMERECIPIENTAFFILIATIONf'MURLEY,T.E.DocumentControlBranch(DocumentControlDesk)~~~I

SUBJECT:

ApplicationforamendstolicensesDPR-586DPR-74,changingTS3/4.1.3toincreaselimitforcontrolrodmisalignmentatorbelow85~ratedthermalpower."ControlRodMisalignmentAnalysis"encl.SNOTES:RECIPIENTIDCODE/NAMEPD3-1LAHICKMAN,JCOPIESLTTRENCL1122RECIPIENTIDCODE/NAMEPD3-1PDCOPIESLTTRENCL11ADDINTERNAL:NRR/DE/EELBNRR/DRCH/HICBNRR/DSSA/SPLBNUDOCS-ABSTRACTOGC/HDS2EXTERNAL:NRCPDR111111111011NRR/DORS/OTSBNRR/DRPWNRR/DSSA/SRXBOCCBE8-...M.LK~01NSIC111111101111DANOTETOALL"RIDS"RECIPIENTS:1'LEASEHELPUSTOREDUCEWAS'ONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISISFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR16ENCL14D IndianaMichiganPowerCompanyP.O.Box16631Columbus,OH43216RAEP:NRC:1182DonaldC.CookNuclearPlantUnits1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74TECHNICALSPECIFICATIONCHANGEREQUESTRODMISALIGNMENTREQUIREMENTFORMOVABLECONTROLASSEMBLIESU.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,DAC.20555Attn:Dr.T.E.MurleyJanuary17,1994

DearDr.Murley:

ThisletteranditsattachmentsconstituteanapplicationforamendmenttotheTechnicalSpecifications(T/S)fortheDonaldC.CookNuclearPlantUnits1and2.Specifically,weareproposingtochangeT/S3/4.1.3forbothunits.ThesechangesincreasetheT/Slimitforcontrolrodmisalignmentatorbelow85%RatedThermalPower.ThechangesalsoincreasetheT/Slimitforcontrolrodmisalignmentabove85$RatedThermalPowerifthereissufficientmarginintheHeatFlux(Fo(Z))andtheNuclearEnthalpy(F>H)HotChannelFactors.IAdescriptionoftheproposedchangesandouranalysisconcerningsignificanthazardsconsiderationpursuantto10CFR50.92arecontainedinAttachmentl.Attachment2containstheexistingT/Spagesmarkedtoreflectproposedchanges.Attachment3containstheproposed,revisedT/Spages.Attachment4containstheanalysestosupporttheT/Schanges.WebelievethattheproposedT/Schangeswillnotresultin(1)asignificantchangeintheamountofanyeffluentsthatmaybereleasedoffsite,or(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheseproposedT/SchangeshavebeenreviewedandapprovedbythePlantNuclearSafetyReviewCommitteeandbytheNuclearSafetyandDesignReviewCommittee.

Dr.T.E.Murley2AEP:NRC'1182Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtoMr.J.R.PadgettoftheMichiganPublicServiceCommissionandtheMichiganDepartmentofPublicHealth.Thisletterissubmittedpursuantto10CFR50.30(b)and,assuch,anoathstatementisattached.Sincerely,E.E.FitzpatrickVicePresidentdrAttachmentscc:A.A.BlindG.CharnoffJ.B.Martin-RegionIIINRCResidentInspectorNFEMSectionChiefJ.R.Padgett Dr.T.E.Murley3AEP'NRC:1182bc:S.J.Brewer-w/oattachmentD.H.Malin/G.JohnP.A.Barrett-w/oattachmentM.L.Horvath-w/oattachmentW.G~Smith,Jr.J.B.Shinnock-w/oattachmentJ.B.Hickman,NRC-Washington,DCDC-N-6015.1-w/oattachmentAEP'NRC:1182 STATEOFOHIO)COUNTYOFFRANKLIN)E.E.Fitzpatrick,beingdulysworn,deposesandsaysthatheistheVicePresidentoflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingTECHNICALSPECIFICATIONCHANGEREQUEST'ODMISALIGNMENTREQUIREMENTFORMOVABLECONTROLASSEMBLIESandknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledgeandbelief.Subscribedsndsworntobeforemethis~/dayof19~.NOTARYPUBLICBITINGD.HILLTTOTAPsYPUDLIC.STATEOFOHIO ATTACHMENT1TOAEP'NRC'1182DESCRIPTIONOFPROPOSEDTECHNICALSPECIFICATIONCHANGESAND10CFR50.92SIGNIFICANTHAZARDSCONSIDERATIONANALYSIS t

Attachment1toAEP:NRC:1182Page1DescritionofChanes(bothunits)TheLimitingConditionforOperationinT/S3.1.3.1ischangedtointroduceaterm"allowedrodmisalignment"toreplacetheconstant"+12steps"misalignmentgivenintheexistingT/S.Also,theLimitingConditionforOperationischangedtoallow+18stepsmisalignmentatorbelow85%ofRatedThermalPower(RTP)andfrom+12stepsto+18stepsmisalignmentabove85%RTP.Thevalueofallowedrodmisalignmentforpowerlevelsgreaterthan85%RTPistobeobtainedfromthenewT/SFigure3.1-4,providedthattheratio(definedasR)ofF>>limitat100%RTPtomaximummeasuredF>Hisgreaterthan1.04.Actionitemsa,bandcarechangedtouse"allowedrodmisalignment"insteadof"+12steps."Surveillancerequirement4.1.3.1.3isaddedtoprovideforthedeterminationoftheallowedrodmisalignmentabove858RTP.Specifically,thisrequirementstatesthattheallowedrodmisalignmentforpowerlevelsgreaterthan858RTPshallbedeterminedinconjunctionwiththemeasurementoftheAllowablePowerLevelasspecifiedinT/S4.2.6.2.2.TheLimitingConditionforOperationinT/S3.1.3.2ischangedtouse"allowedrodmisalignment"insteadof"+12steps"tobeconsistentwithT/S3.1.3.1.Actionitemb.landsurveillancerequirement4.1.3.2arealsochangedtouse"allowedrodmisalignment."3.Figure3.1-4,AllowedRodMisalignmentAbove85%RTP,isaddedtotheT/S.4~Basesforsection3/4.2.2and3/4.2.3ischangedtospecifyanallowedrodmisalignmentof+18stepsatorbelow858RTPandanallowedrodmisalignmentof+12stepsto+18stepsabove85$RTP,ReasonfortheChanesExperiencewiththeAnalogRodPositionIndication(ARPI)Systemhasshownthattheindicatedmisalignmentcouldbegreaterthan12steps.AsperT/Sactionitem3.1.3.2.a,anincorefluxmaphastobetakenevery8hours(incorefluxmapsaretakenevery6hourstobeconservative)toverifytheactuallocationoftherod.Inallcasesthesefluxmapshaveshownthattherewasnoactualrodmisalignment.ChangingtheT/Sto

',H Attachment1toAEP:NRC:1182Page2allow+18stepsmisalignmentwillreducetheusageofthefluxmappingsystem.HeavyuseofthefluxmappingsystemmayrequiremoremaintenanceworkandmaybeanALARAconcern.Furthermore,powertransients(shutdowns)havebeeninitiatedasrequiredbytheT/Sswhichwereunnecessary.PowermaneuversandfullpoweroperationhavealsobeenlimitedduetoARPIindication.Itshouldbenotedthatifmisalignedrodsaredetected(viachangesinPower,QuadrantTiltorFluxMap)theyarerealignedusingestablishedprocedures.JustificationfortheChanePowerdistributioncalculationswithrodmisalignmentsof18steps(18stepsindicated+12stepuncertainty)showthattheincreaseinpeakingfactorswillbeaccommodatedatorbelow85%RTP.Thecalculationsalsoshowedthatabove85%RTP,amisalignmentof18steps(18stepsindicated+12stepsuncertainty)maybeaccommodatediftheAllowablePowerLevel(APL)asdefinedinT/S3.2.6isatleast106$andthemargininF><isatleast4%.LowerlevelsofmisalignmentareallowedforlowerAPLvalues.Theminimummisalignmentof12stepsisallowedwithoutadditionalmargininAPLandF><.ThisanalysisisprovidedinAttachment4.10CFR5092SinificantHazardsConsiderationAnalsisPer10CFR50.92,aproposedamendmenttoanoperatinglicensewillnotinvolveasignificanthazardsconsiderationiftheproposedamendmentsatisfiesthefollowingthreecriteria:Doesnotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyanalyzed,2.Doesnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyanalyzedorevaluated,or3.Doesnotinvolveasignificantreductioninamarginofsafety.Criteria1and3AsseeninAttachment4,sufficientmarginexistsinpowerdistributionat85%RTPtoallowforincreasedmisalignment.At100%RTP,increasedmisalignmentisallowedonlyifthereisadequatemargininthepeakingfactors.Therefore,initialconditionsremainunchangedfromthatassumedinthesafetyanalyses.Asfarast'edroppedrodandrodejectionaccidentsareconcerned,theanalyseswereperformedwithconservativeassumptionstoenvelopetheincreasedmisalignment.ItshouldbenotedthatthepowerdependentinsertionlimitforUnit1willbechangedinaconservativemanneratthebeginningofcycle14.Basedonthese Attachment1toAEP:NRC:1182Page3analyses,itisconcludedthattheproposedT/Schangesdonotsignificantlyincreasetheprobabilityorconsequencesofapreviouslyanalyzedaccidentorconstituteasignificantreductioninthemarginofsafety.Criterion2TheproposedT/Schangeswillnotresultinphysicalchangestotheplant.Therefore,webelievethattheproposedT/Schangeswillnotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyevaluated.Also,operationofthereactorwithpossibledeeperrodinsertionwillnotcreatethepossibilityofanewordifferentkindofaccident.Lastly,wenotethattheCommissionhasprovidedguidanceconcerningthedeterminationofsignificanthazardsbyprovidingcertainexamples(48FR14870)ofamendmentsconsiderednotlikelytoinvolvesignificanthazardsconsideration.Thesixthoftheseexamplesreferstochangeswhichmayresultinsomeincreaseintheprobabilityofoccurrenceorintheconsequencesofapreviouslyanalyzedaccident,buttheresultsofwhicharewithinlimitsestablishedasacceptable.Therefore,webelievetheexamplecitedisapplicableandthattheproposedT/Schangesdonotinvolveasignificanthazardsconsiderationasdefinedin10CFR50.92.