ML17334A518

Application to Amend License DPR-74,revising Tech Specs Re Flowrate for Flow Balance Test of Safety Injection Pumps

ML17334A518
Person / Time
Site:	Cook
Issue date:	03/15/1984
From:	ALEXICH M P INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	DENTON H R Office of Nuclear Reactor Regulation
Shared Package
ML17326B107	List: ML17326B106 ML17334A518
References
AEP:NRC:0860A, AEP:NRC:860A, NUDOCS 8403200210
Download: ML17334A518 (8)

Text

REGULATORYINOR@ATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR8403200210DUC~DATE84/03/15NOTARIZEDNOFACIL:50316DonaldC.CookNuclearPowerPlantiUnit2~IndianaAUTHINANEAUTHORAFFILIATIONALEXICH~M.P.IndianaIlMichiganElectricCo~RECIP,NAMERECIPIENTAFFILIATIONDENTONtH~REOfficeofNuclearReactorRegulationrDirector

SUBJECT:

ApplicationtoamenaLicenseDPH-74<revisingTechSpecsreflowratefortlowbalancetestofsafetyinjectionpumps'ISTRIBUTIUNCODE:IE2cSCOPIESRECEIVED:LTRENCLSIZE:TITLE!Start-UpReport/RefuelingReport(50Dkt).NOTES:DOCKET¹05000316RECIPIENTIDCODE/NAMENRRORB1BC04INTERNAL:IEFILE01'RR/DHFS'DIR08NRR/OSI/CPBCOPIESLTTRENCL3111'11RECIPIENTIDCODE/NAME.NRR/DHFSDEPY07NRR/DHFS/PSRB11Rf/DDAMI/MIB09COPIESLTTRENCL1]1EXTERNAL;ACRSNRCPDRNTIS.130251111LPDRNSIC0305lgTOTALNUHBEHOFCOPIESREQUIRED:LTTR~ENCLb INDIANA&MICHIGANELECTRICCOMPANYP.O.BOX16631COLUMBUS,OHIO43216March.15,1984AEP:NRC:0860ADonaldC.CookNuclearPlantUnitNo.2DocketNo.50-316LicenseNo.DPR-7'4AMENDMENTTOTHEAPPLICATIONFORUNIT2TECHNZCALSPECIFICATIONCHANGESFORCYCLE5RELOADMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulationU.,S.Nuclear.RegulatoryCommissionWashington,D.C.20555

DearMr.Denton:

Bythisletteranditsattachments,werequestanamendmenttotheapplicationforTechnicalSpecification(T/S)changes,whichwasaddressedinourletterAEP:NRC:0860datedMarch1,1984.ThisletterincludesadditionalinformationrelatedtotheseventhproposedchangeaddressedinAEP:NRC:0860;andrequestsoneadditionalT/Schange.Thewordingoftheseventhchangehasbeenslightlymodifiedinthissubmittaltomakethechangeeasiertounderstand.Attachment1tothisletteraddressestheSignificantHazardsConsideration,asrequiredtobesubmittedby10CFR50.91(a)(1),forthemodifiedversionoftheseventhproposedchangeofletterAEP:NRC:0860.TheseventhproposedchangeconcernedtheflowratefortheflowbalancetestfortheSafetyIn'jection(SZ)pumps'heSIpumpflowratewouldbeaffectedbyplannedmodificationstoincreasetheminiflowoftheSZpumps.Theincreasedminiflowwouldprovideaddedassuranceofadequatepumpcoolingwhilethepumpisoperatingbutnotinjectingtothecore.Znordertomakethephysicalmodificationsforthischangeonareasonabletimetable,wearerequestinganearlyindicationbyMarch23,1984oftheacceptabilityofthisT/Schangerequest.Attachment2tothisletteraddressestheadditionalT/SchangethatisbeingrequestedaspartoftheUnit2Cycle5reloadapplicationandourSignificantHazardsConsiderationanalysispursuantto10CFR50.92forthischange.Attachment3tothislettercontainstherevisedpagesfortheadditionalT/Schanges(includingthemodifiedversionoftheseventhchangeproposedinAEP:NRC:0860).Thechangestotherevisedpagesare84032002l08403l5PDR*DOCK0500031hPPDRgrad>~.g~filee/I Mr.HaroldR.Dent~~AEP:NRC:0860Aindicatedbyverticallinesontheright,handmaxginofthepage.TheT/SchangecontainedinthisAttachmenthasbeenreviewedandapprovedbythePlantNuclearSafetyReviewCommitteeandwillbereviewedbytheAEPSCNuclearSafetyandDesignReviewCommittee(NSDRC)attheirnextscheduledmeeting.Attachment4tothisletteristhesummaryofthesafetyevaluationperformedbyWestinghousetosupportanincreasefrom30gpmto60gpminthesafetyinjectionpumpminiflow.Asrequiredby10CFR50.91(b)(1),acopyof.thisamendedapplicationisbeingtransmittedtotheappropiiateofficialoftheStateofMichigan.Ourletter'EP:NRC:0860transmittedtheClassIVfeeleviedforthereviewoftheCycle5reloadofUnit2.WeconsidertheTechnicalSpecificationchangerequestscontainedinthislettertobepartofthatx'eview.Therefox'e,webelievethatnofee,asdefinedin10CFR170.22,.isrequiredfortherequestsaddressedinthisletter.ThisdocumenthasbeenpreparedfollowingCorporateprocedureswhichincorporatea.reasonablesetofcontrolstoinsureitsaccuracyandcompletenesspriortosignaturebytheundersigned.Verytrulyyours,q5~M.P.exich4;~'VicePresidentMPA/pbAttachmentscc:JohnE.DolanW.G;'Smith,Ji.-BridgmanR.C.CallenG.CharnoffE.R.Swanson,NRCResidentInspector-Bridgman Mr.HaroldR.DentonAEPNRC0860AATTACHMENT1TOAEP:NRC:0860ASIGNIFICANTHAZARDSCONSIDERATICNFORCERNGEINFLCNRATEFORTHESAFEZYINJECTICNPUMPSFECNBALAN~TEST

'Mr.HaroldR.DentoAEP:NRC:0860ATheseventhproposedchangeaddressedinletterAEP:NRC:0860requestedthefootnote(**)onpage3/45-6forT/S4.5.2.hbechangedtoread:**TotalSIS(singlepump)flow,includingminiflow/shallnotexceed700gpmwithnomorethan640gpmbeingdeliveredtothecore.Werequestthatthisproposedchangebemodifiedforclarity,toread:**CombinedLoop1,2,3,and4ColdLegFlow(singlepump)(640gpm.TotalSIS(singlepump)flow,includingminiflow,shallnotexceed700gpm.Theabovechangewillallowforincreased(miniflow)coolingoftheSafetyInjectionpumpswhichprovidesincreasedassuranceofadequate*pumpcoolingwhileusingminiflowcooling.Theincreaseinminiflowmayresultinasmalldecreasei:nflowfrom'thepumpstothecore.WestinghousehasperformedasafetyevaluationoftheincreasedSIpumpminiflowanddecreasedinjectionflowtothecore.ThesummaryoftheirevaluationisenclosedasAttachment4.Theresultsoftheirevaluationconcludedthattheimpact'snegligibleforlargebreakLOCAandan0increaseof86.1Finpeakcladtemperature(PCT)forthemostlimitingsmallbreakLOCA,basedonasensitivityanalysisperformedonUnit1.TheadditionofthisincreaseinsmallbreakLOCAPCTtothecurrentD.C.CookUnit2smallbreakLOCAPCTof1668Fresultsina0valuewellbelowthe10CFR50.46limitof2200F.Basedondiscussions0withyourstaff,weunderstandfurtherinformationregardingtheWestinghouseevaluationisneeded.Therefore,wewillsubmitadditionalclarificationoftheevaluationinthenearfuture.WehavealsoperformedareviewoftheproposedflowrateontheintegrityoftheSIpumps.OurreviewincludedacalculationtodeterminetheNetPositiveSuctionHead(NPSH)availabletotheSafetyInjection(SI)pumps.InthecalculationweassumedthatSIwasintheinjectionphaseandalignedwiththeRefuelingWaterStorageTank(RWST);theRWSTwasatit'slowlowlevelsthewatertemperaturewas0100F;allsafetypumpswererunning(i.e.,ResidualHeatRemoval,ContainmentSpray,CentrifugalCharging,andSIpumps);andallpumpswereproducingmaximumflow.WebelievetheassumedconditionsconstitutetheworstcaseconditionsfortheSIpumps.Theresultsofthecalculationindicatedthatwiththeaboveconditions,therewouldbeaNPSHmarginofoversixteen(16)feetforbothoftheSIpumps.Therefore,theincreasedflowrateiswithinthesafetyboundsofthepumprunoutandhasnosignificantadverseeffectontheintegrityofthepumps.Basedontheabove,theproposedT/Schangemayresultinsomeincreasetotheconsequencesofapreviouslyanalyzedaccidentormayreduceinsomewayasafetymargin,butitisourbeliefthattheresultsofthechangeareclearlywi.thinallacceptablecriteriawithrespecttothesystemandcomponent'sastheymayaffecttheSafetyAnalysisoftheplant.Thustheproposedchangedoesnotinvolveasignificanthazardsconsiderationasdefinedin10CFR50.92.

Mr.HaroldR.Dento-5-AEP:NRC:0860AATTACHMENT2TOAEP:NRC:0860AADDITIONALTECHNICALSPECIFICATIONCHANGEREQUESTFORDONALDC.COOKNUCLEARPLANTUNITNO.2CYCLE5 Mr.HaroldR.Den-6-AEP:NRC:0860ATheeighthproposedchangeconcernsT/S3/4.10.5whichaddressestheRodPositionIndication(RPI)Channelsduringshutdown(MODES3,4,and5).Specifically,wearerequestingthatT/S3/4.10.5bechangedtoaddressthedemandpositionindicatorsinsteadoftheindividualRPXs.Thereasonsandjustificationforthischangeareasfollows:T/S4.1.3.4requiresroddroptimemeasurementsoffulllengthrodsbedemonstrated...followingeachremovalofthereactorvesselhead,etc.T/S4.10.5statesrodpositionindicationchannelsshallbedeterminedtobeOPERABLEbyverifyingthedemandpositionindicationsystemandtherodpositionindicationchannelagreewithin12stepswithin24hourspriortothestartofroddroptimemeasurement...Znordertoverifythe12stepagreementbetweentheindividualRPZsandthedemandpositionindicationsystem,theindividualRPIshavetobecalibrated.TheRPZforeachindividualrodiscalibratedatthe~beginningofafuelcyclewhenthereactorcoolantsystemisatoperatingtemperature.CalibrationisperformedatoperatingtemperaturebecausetheRPIsareextremelytemperaturesensitiveandthereforebecomeincreasinglyinaccurateoverthelargetemperaturechangebetweenMODES5through3.CoiloperatingtemperatureisnotestablisheduntiltheReactorCoolantSystem(RCS)reachesequilibriumafterascendingthroughMODES5,4,and3..Thecoiltakesapproximatelysix(6)hourstoreachequilibriumtemperature,thusdelayingstartupofthereactor.Utilityexperienceindicatesthatthe(group)demandpositionindicationsystemshaveproventobeextremelyreliableinWestinghousereactors.DemandpositionindicationsystemsarethemostaccuratemeansofdeterminingrodpositionandareinfactusedtocalibratetheRPXs.Furthermore,theT/Ssrequirethatthereactorbemaintainedinasubcritical,condition(k(0.99)topreventinadvertentcriticalityinMODES3,4,and5.Subcriticalitycanbeadequatelymaintainedwithsufficientboronconcentrationandallbutoneshutdownorcontrolbankbeingfullyinserted.Criticalityisnormallynotreacheduntiltheshutdownbanksandthreeofthefourcontrolbanksarefullywithdrawn.T/S3.10.5willcontinuetorequireonlyoneshutdownorcontrolbankbewithdrawnfromthefullyinsertedpositionatatime,duringroddroptimemeasurements.Therefore,webelievethereisadequatejustification.fortheproposedchange,whichwouldeliminatethedelayinstartup.Thischangemayresultinsomeincreasetotheprobabilityorconsequencesofaprev'ouslyanalyzedaccidentormayreduceinsomewayasafetymargin,butitisourbeliefthattheresultsofthechangeareclearlywithinallacceptablecriteriawithrespecttothesystemorcomponentsastheymayaffecttheSafetyAnalysisoftheplant.Thus,theproposedchangedoesnotinvolveasignificanthazardsconsiderationasdefinedin10CPR50.92.

Mr.HaroldR.DentonAEP:NRC:0860AATTACHMENT3TOAEP:NRC:0860AREVISEDTECHNICALSPECIFICATIONPAGESFORTHESEVENTHANDEIGHTHPROPOSEDCHANGES