ML17333A355

Application for Amend to License DPR-74,removing TSs Re Shutdown & Control Rod Position Indication While in Modes 3, 4 & 5

ML17333A355
Person / Time
Site:	Cook
Issue date:	03/12/1996
From:	FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17333A356	List: ML17333A355 ML17333A357
References
AEP:NRC:1248, NUDOCS 9603200113
Download: ML17333A355 (7)

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CATEGORYj.REGULAT+INFORMATIONDISTRIBUTIONOZSTEM(RIDE)DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributiontACCESS.:GN-NBR.:9603200113DOC.DATE:96/03/12NOTARIZED:YESDOCKETFACIL:50.-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONFITZPATRICK,E.IndianaMichiganPowerCo.(formerlyIndiana&Mi'chiganEleRECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)

SUBJECT:

ApplicationforamendtolicenseDPR-74,removingTSsreshutdown6controlrodpositionindicationwhileinmodes3,4S5.NOTES:RECIPIENTIDCODE/NAMEPD3-1LAHICKMAN,JCOPIESLTTRENCL1111RECIPIENTIDCODE/NAMEPD3-1PDCOPIESLTTRENCL11INTERN.gCENTERCBNRR/DSSA/SRXBOGC/HDS2EXTERNAL:NOAC1111111011NRR/DE/EMCBNRR/DSSA/SPLBNUDOCS-ABSTRACTNRCPDR11111111NOTETOALL"RIDSNRECIPIENTS)PLEASEHELPUSTOREDUCEWASTElCONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFN5D-5(EXT.415"20B3)TOELIMINATEYOURNAMEFROMDXSTRKBUTXONLXSTS"'FORDOCUMENTSYOUDON'TNEEDlTOTALNUMBEROFCOPIESREQUIRED:LTTR12ENCL.11 IndianaMichigan~PowerCompanyPOBox16631Columbus,OH43216INOlANANlCHIGANPOWERMarch12,1996AEP:NRC:1248DocketNos.:50-316U.S.NuclearRegulatoryCommissionATTN:DocumentControlDeskWashington,D.C.20555Gentlemen:DonaldC.CookNuclearPlantUnit2PROPOSEDAMENDMENTTOREMOVETECHNICALSPECIFICATIONS3.1.3.3AND3.10.5,"RODPOSITIONINDICATORCHANNELS-SHUTDOWN,"TOACHIEVECONSISTENCYWITHDONALDC.COOKNUCLEARPLANTUNIT1ANDNUREG-1431.Thisletteranditsattachmentsconstituteanapplicationforamendmenttothetechnicalspecifications(T/Ss)forDonaldC.CookNuclearPlantunit2.Specifically,weareproposingtoremovetheT/Ssrelatedtoshutdownandcontrolrodpositionindicationwhileinmodes3,4,and5.Thefollowingunit2T/Ssareaffected:3.1.3.3and3.10.5andassociatedsurveillancesandbases.TheexistingCookNuclearPlantunit2T/SsrequirethatrodpositionindicationbeOPERABLEforeachshutdownandcontrolrodnotfullyinsertedinmodes3,4,and5.IfOPERABILITYcannotbeassured,thenumberofcontrolorshutdownrodsthatcanbewithdrawnislimitedtoasinglebankwhileperformingroddroptests.Thisrequirementisoverlyrestrictivesince,duringshutdownmodes,theabilitytoensureadequateshutdownmargincanbecompensatedbyanincreaseintheboronconcentrationofthereactorcoolantsystem.Inadditiontothereductioninunnecessaryrequirements,theproposed,amendmentwouldalsoaligntheaffectedunit2T/Sswiththeunit1T/SsandtheimprovedstandardtechnicalspecificationsissuedbytheNRCasNUREG-1431,Revision1.Attachment1providesadetaileddescriptionoftheproposedchanges,thejustificationforthechanges,andourdeterminationofnosignificanthazardsconsiderationperformedpursuantto10CFR50.92.Attachment2containstheexistingT/Spagesmarked'76032001i39603i2PDRADQCK05000316PPDR00l~

U.S.NuclearRegulatoryCommissionPage2AEP:NRC:1248toreflecttheproposedchanges.Attachment3containstheproposedT/Spages.Webelievetheproposedchangeswillnotresultin(1)asignificantchangeinthetypesofanyeffluentthatmaybereleasedoffsite,or(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandwillbereviewedatthenextregularlyscheduledNuclearSafetyandDesignReviewCommitteemeeting.ItisrequestedthattheproposedamendmentbeapprovedbyApril12,1996insupportoftheupcomingunit2refueling.Incompliancewiththerequirementsof10CFR50.91(b)(1),copiesofthisletteranditsattachmentshavebeentransmittedtotheMichiganPublicServiceCommissionandtotheMichiganDepartmentofPublicHealth.ca~E.E.Fitzpatrick,VicePresidentSWORNTOANDSUBSCRIBEDBEFOREMEotaryPublicpitAttachmentcc:A.A.BlindG.CharnoffH.J.MillerNFEMSectionChiefNRCResidentInspector-BridgmanJ.R.Padgett ATTACHMENT1TOAEP:NRC:1248DESCRIPTIONANDJUSTIFICATIONOFCHANGES10CFR50.92ANALYSISFORCHANGESTOTHEDONALDCDCOOKNUCLEARPLANTUNIT2TECHNICALSPECIFICATIONS ATTACHMENTTOAEP:NRC:1248DESCRIPTIONOFCHANGESPage1Thefollowingunit2technicalspecifications(T/S)3.1.3.3and3.10.5andassociatedsurveillancesandbasesareaffectedbytheproposedchange.TS34133DeletetheReactivityControlSystems,PositionIndicatorChannels-Shutdown,LimitingConditionforOperation(3.1.3.3)andtheassociatedsurveillance(4.1.3.3)(page3/41-22).TS3410.5DeletetheSpecialTestException,PositionIndicatorChannelsShutdown,LimitingConditionforOperation(3.10.5)andtheassociatedsurveillances(4.10.5.1and4.10.5.2)(page3/410-5).Also,deletethebasesreferencetoT/S3/4.10.5,PositionIndicatorChannel-Shutdown(pageB3/410-1)IndexDeletereferenceto"PositionIndicatorChannels-Shutdown,"fromthetechnicalspecificationIndex(pageIV).II.JUSTIFICATIONFORCHANGESTheaxialpositionofshutdownrodsandcontrolrodsisdeterminedbytwoseparateandindependentsystems:thebankdemandpositionindicationsystemandtheanalogrodpositionindication(ARPI)system.Thecurrentunit2T/SsrequiretheARPIsystemtobeOPERABLEforeachshutdownandcontrolrodnotfullyinsertedinmodes3,4,and5.Tosatisfythisrequirement,twosetsofARPIcalibrationsmustbeperformed.OnecalibrationisperformedonanindividualrodbankbasistosatisfytheARPIrequirementsduringroddroptestinginaccordancewithT/S3/4.10.5.Thesecondcalibrationisperformedatthecompletionofthe"bank"calibrationsequencetoensurethattherodsarecalibratedcorrectlytoaddressbankoverlap.Thesecalibrationsareredundantandtimeintensive.Additionally,inmodes3,4,and5,theboronconcentrationinthereactorcoolantsystem(RCS)isincreasedtoensurethatadequateshutdownmargin(SDM)isachievedandmaintainedinaccordancewithexistingCookNuclearPlantT/Ss.Thecalculationusedtoobtain ATTACHMENTTOAEP:NRC:1248Page2therequiredboronconcentrationtakesintoaccounttherelativepositionofthecontrolandshutdownrods.StrictproceduralcontrolsareinplaceatCookNuclearPlanttoensurethatanallrodsoutshutdownmarginismaintainedduringrodpositionindicatorcalibration.Theadjustmentofboronconcentrationtoassureadequateshutdownmargininmodes3,4,and5isalsosupportedbytheImprovedStandardTechnicalSpecifications(ISTS)forWestinghousePlants(NUREG-1431).TheISTSdoesnotcontainaT/Sforrodpositionindicationinmodes3,4,and5;however,thebasespositionforthemodes1and2T/Ssaddresstheshutdownmodesinthefollowingmanner."InshutdownMODES,theOPERABILITYoftheshutdownandcontrolbankshasthepotentialtoaffecttherequiredSDM(shutdownmargin),butthiseffectcanbecompensatedforbyanincreaseintheboronconcentrationoftheReactorCoolantSystem."Therefore,theassurancethatadequateshutdownmarginexistsforanallrodsoutconditioninmodes3,4,and5negatestheneedforrodpositionindicationinthesemodes.Technicalspecification3.10,5isa"specialtestexception"directlytiedtoT/S3.1.3.3.Specifically,itprovidesanexemptionfromthe"positionindicatorchannel-shutdown"requirementsduringroddroptesting.Deletionofthisspecificationisnecessarysincetheprimaryspecification3.1.3.3isbeingdeleted.ItisconcludedthatthedeletionofT/S3.1.3.3,PositionIndicationChannels-Shutdown,doesnotresultinareductioninsafetyastheimpactonshutdownmarginisadequatelycompensatedforbyanincreaseinboronconcentrationthatisconsistentwiththeguidanceofNUREG-1431.III.10CFR5092CRITERIAPer10CFR50.92,thisproposedchangedoesnotinvolveasignificanthazardsconsiderationbecausethechangedoesnot:involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated,or3.involveasignificantreductioninamarginofsafety.

Attachment1toAEP:NRC:1248Page3Criterion1TheboronconcentrationinthereactorcoolantsystemwillbehighenoughtoassureadequateSDMinmodes3,4,and5.Thecalculationtoobtaintherequiredboronconcentrationtakesintoaccountthepositionoftherods.Shutdownmarginisassumedasaninitialconditioninthesafetyanalysis.ThesafetyanalysisestablishesaSDMthatensuresspecifiedacceptablefueldesignlimitsarenotexceeded.AslongastheSDMissatisfied,nochangeintheprobabilityorconsequencesofanaccidentpreviouslyevaluatedwillresultfromtheproposeddeletionofthe"positionindicatorshutdown"specification.ItisnotedthatthischangeisconsistentwiththenewISTSapprovedbytheNRCasNUREG-1431,Rev.l.Criterion2TheabilitytoinsertthecontrolandshutdownrodsprovidedbytherodcontrolsystemisnotaffectedbytheOPERABILITYstatusoftheARPIsystem.Asmentionedpreviously,thereactorcoolantsystemboronconcentrationwillbehighenoughtoassureadequateSDMismaintained.Therefore,itisconcludedthattheproposedchangesdonotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.Criterion3Themarginofsafetyrequirements,arenotaffectedbytheremovalofthisT/S.TherequiredSDMwhichisaninitialconditioninthesafetyanalysis,isunaffectedsincethereactorcoolantsystemboronconcentrationisincreasedtoaddressthe.potential"allrodsout"configuration.Basedontheseconsiderations,itisconcludedthattheproposedchangesdonot'involveasignificantreductioninamarginofsafety.