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{{#Wiki_filter:REGULATORYINOR@ATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR8403200210DUC~DATE84/03/15NOTARIZEDNOFACIL:50316DonaldC.CookNuclearPowerPlantiUnit2~IndianaAUTHINANEAUTHORAFFILIATIONALEXICH~M.P.IndianaIlMichiganElectricCo~RECIP,NAMERECIPIENTAFFILIATIONDENTONtH~REOfficeofNuclearReactorRegulationrDirector
{{#Wiki_filter:REGULATORY INOR@ATIONDISTRIBUTION SYSTEM(RIDS)ACCESSION NBR8403200210DUC~DATE84/03/15NOTARIZEDNOFACIL:50316DonaldC.CookNuclearPowerPlantiUnit2~IndianaAUTHINANEAUTHORAFFILIATION ALEXICH~M.P.
IndianaIlMichiganElectricCo~RECIP,NAME RECIPIENT AFFILIATION DENTONtH~REOfficeofNuclearReactorRegulationr Director


==SUBJECT:==
==SUBJECT:==
ApplicationtoamenaLicenseDPH-74<revisingTechSpecsreflowratefortlowbalancetestofsafetyinjectionpumps'ISTRIBUTIUNCODE:IE2cSCOPIESRECEIVED:LTRENCLSIZE:TITLE!Start-UpReport/RefuelingReport(50Dkt).NOTES:DOCKET&#xb9;05000316RECIPIENTIDCODE/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
Application toamenaLicenseDPH-74<revising TechSpecsreflowratefortlowbalancetestofsafetyinjection pumps'ISTRIBUTIUN CODE:IE2cSCOPIESRECEIVED:LTR ENCLSIZE:TITLE!Start-UpReport/RefuelingReport(50Dkt).NOTES:DOCKET&#xb9;05000316RECIPIENT IDCODE/NAME NRRORB1BC04INTERNAL:
IEFILE01'RR/DHFS'DIR 08NRR/OSI/CPBCOPIESLTTRENCL3111'11RECIPIENT IDCODE/NAME
.NRR/DHFSDEPY07NRR/DHFS/PSRB11 Rf/DDAMI/MIB 09COPIESLTTRENCL1]1EXTERNAL; ACRSNRCPDRNTIS.130251111LPDRNSIC0305lgTOTALNUHBEHOFCOPIESREQUIRED:
LTTR~ENCLb INDIANA&MICHIGANELECTRICCOMPANYP.O.BOX16631COLUMBUS, OHIO43216March.15,1984AEP:NRC:0860A DonaldC.CookNuclearPlantUnitNo.2DocketNo.50-316LicenseNo.DPR-7'4AMENDMENT TOTHEAPPLICATION FORUNIT2TECHNZCAL SPECIFICATION CHANGESFORCYCLE5RELOADMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulation U.,S.Nuclear.Regulatory Commission Washington, D.C.20555


==DearMr.Denton:==
==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  
Bythisletteranditsattachments, werequestanamendment totheapplication forTechnical Specification (T/S)changes,whichwasaddressed inourletterAEP:NRC:0860 datedMarch1,1984.Thisletterincludesadditional information relatedtotheseventhproposedchangeaddressed inAEP:NRC:0860; andrequestsoneadditional T/Schange.Thewordingoftheseventhchangehasbeenslightlymodifiedinthissubmittal tomakethechangeeasiertounderstand.
'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.
Attachment 1tothisletteraddresses theSignificant HazardsConsideration, asrequiredtobesubmitted by10CFR50.91(a)(1),forthemodifiedversionoftheseventhproposedchangeofletterAEP:NRC:0860.
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.
Theseventhproposedchangeconcerned theflowratefortheflowbalancetestfortheSafetyIn'jection (SZ)pumps'heSIpumpflowratewouldbeaffectedbyplannedmodifications toincreasetheminiflowoftheSZpumps.Theincreased miniflowwouldprovideaddedassurance ofadequatepumpcoolingwhilethepumpisoperating butnotinjecting tothecore.Znordertomakethephysicalmodifications forthischangeonareasonable timetable,wearerequesting anearlyindication byMarch23,1984oftheacceptability ofthisT/Schangerequest.Attachment 2tothisletteraddresses theadditional T/Schangethatisbeingrequested aspartoftheUnit2Cycle5reloadapplication andourSignificant HazardsConsideration analysispursuantto10CFR50.92forthischange.Attachment 3tothislettercontainstherevisedpagesfortheadditional T/Schanges(including themodifiedversionoftheseventhchangeproposedinAEP:NRC:0860).
Mr.HaroldR.DentonAEP:NRC:0860AATTACHMENT3TOAEP:NRC:0860AREVISEDTECHNICALSPECIFICATIONPAGESFORTHESEVENTHANDEIGHTHPROPOSEDCHANGES}}
Thechangestotherevisedpagesare84032002l0 8403l5PDR*DOCK0500031hPPDRgrad>~.g~filee/I Mr.HaroldR.Dent~~AEP:NRC:0860A indicated byverticallinesontheright,handmaxginofthepage.TheT/Schangecontained inthisAttachment hasbeenreviewedandapprovedbythePlantNuclearSafetyReviewCommittee andwillbereviewedbytheAEPSCNuclearSafetyandDesignReviewCommittee (NSDRC)attheirnextscheduled meeting.Attachment 4tothisletteristhesummaryofthesafetyevaluation performed byWestinghouse tosupportanincreasefrom30gpmto60gpminthesafetyinjection pumpminiflow.Asrequiredby10CFR50.91(b)(1),
acopyof.thisamendedapplication isbeingtransmitted totheappropiiate officialoftheStateofMichigan.
Ourletter'EP:NRC:0860 transmitted theClassIVfeeleviedforthereviewoftheCycle5reloadofUnit2.WeconsidertheTechnical Specification changerequestscontained inthislettertobepartofthatx'eview.Therefox'e, webelievethatnofee,asdefinedin10CFR170.22,.isrequiredfortherequestsaddressed inthisletter.Thisdocumenthasbeenpreparedfollowing Corporate procedures whichincorporate a.reasonable setofcontrolstoinsureitsaccuracyandcompleteness priortosignature bytheundersigned.
Verytrulyyours,q5~M.P.exich4;~'VicePresident MPA/pbAttachments cc:JohnE.DolanW.G;'Smith, Ji.-BridgmanR.C.CallenG.CharnoffE.R.Swanson,NRCResidentInspector
-Bridgman Mr.HaroldR.DentonAEPNRC0860AATTACHMENT 1TOAEP:NRC:0860ASIGNIFICANT HAZARDSCONSIDERATICN FORCERNGEINFLCNRATEFORTHESAFEZYINJECTICN PUMPSFECNBALAN~TEST  
'Mr.HaroldR.DentoAEP:NRC:0860A Theseventhproposedchangeaddressed inletterAEP:NRC:0860 requested thefootnote(**)onpage3/45-6forT/S4.5.2.hbechangedtoread:**TotalSIS(singlepump)flow,including miniflow/shallnotexceed700gpmwithnomorethan640gpmbeingdelivered tothecore.Werequestthatthisproposedchangebemodifiedforclarity,toread:**Combined Loop1,2,3,and4ColdLegFlow(singlepump)(640gpm.TotalSIS(singlepump)flow,including
: miniflow, shallnotexceed700gpm.Theabovechangewillallowforincreased (miniflow) coolingoftheSafetyInjection pumpswhichprovidesincreased assurance ofadequate*pumpcoolingwhileusingminiflowcooling.Theincreaseinminiflowmayresultinasmalldecreasei:nflowfrom'thepumpstothecore.Westinghouse hasperformed asafetyevaluation oftheincreased SIpumpminiflowanddecreased injection flowtothecore.Thesummaryoftheirevaluation isenclosedasAttachment 4.Theresultsoftheirevaluation concluded thattheimpact'snegligible forlargebreakLOCAandan0increaseof86.1Finpeakcladtemperature (PCT)forthemostlimitingsmallbreakLOCA,basedonasensitivity analysisperformed onUnit1.TheadditionofthisincreaseinsmallbreakLOCAPCTtothecurrentD.C.CookUnit2smallbreakLOCAPCTof1668Fresultsina0valuewellbelowthe10CFR50.46limitof2200F.Basedondiscussions 0withyourstaff,weunderstand furtherinformation regarding theWestinghouse evaluation isneeded.Therefore, wewillsubmitadditional clarification oftheevaluation inthenearfuture.Wehavealsoperformed areviewoftheproposedflowrateontheintegrity oftheSIpumps.Ourreviewincludedacalculation todetermine theNetPositiveSuctionHead(NPSH)available totheSafetyInjection (SI)pumps.Inthecalculation weassumedthatSIwasintheinjection phaseandalignedwiththeRefueling WaterStorageTank(RWST);theRWSTwasatit'slowlowlevelsthewatertemperature was0100F;allsafetypumpswererunning(i.e.,ResidualHeatRemoval,Containment Spray,Centrifugal
: Charging, andSIpumps);andallpumpswereproducing maximumflow.Webelievetheassumedconditions constitute theworstcaseconditions fortheSIpumps.Theresultsofthecalculation indicated thatwiththeaboveconditions, therewouldbeaNPSHmarginofoversixteen(16)feetforbothoftheSIpumps.Therefore, theincreased flowrateiswithinthesafetyboundsofthepumprunoutandhasnosignificant adverseeffectontheintegrity ofthepumps.Basedontheabove,theproposedT/Schangemayresultinsomeincreasetotheconsequences ofapreviously analyzedaccidentormayreduceinsomewayasafetymargin,butitisourbeliefthattheresultsofthechangeareclearlywi.thinallacceptable criteriawithrespecttothesystemandcomponent's astheymayaffecttheSafetyAnalysisoftheplant.Thustheproposedchangedoesnotinvolveasignificant hazardsconsideration asdefinedin10CFR50.92.
Mr.HaroldR.Dento-5-AEP:NRC:0860A ATTACHMENT 2TOAEP:NRC:0860A ADDITIONAL TECHNICAL SPECIFICATION CHANGEREQUESTFORDONALDC.COOKNUCLEARPLANTUNITNO.2CYCLE5 Mr.HaroldR.Den-6-AEP:NRC:0860A TheeighthproposedchangeconcernsT/S3/4.10.5whichaddresses theRodPositionIndication (RPI)Channelsduringshutdown(MODES3,4,and5).Specifically, wearerequesting thatT/S3/4.10.5bechangedtoaddressthedemandpositionindicators insteadoftheindividual RPXs.Thereasonsandjustification forthischangeareasfollows:T/S4.1.3.4requiresroddroptimemeasurements offulllengthrodsbedemonstrated
...following eachremovalofthereactorvesselhead,etc.T/S4.10.5statesrodpositionindication channelsshallbedetermined tobeOPERABLEbyverifying thedemandpositionindication systemandtherodpositionindication channelagreewithin12stepswithin24hourspriortothestartofroddroptimemeasurement...
Znordertoverifythe12stepagreement betweentheindividual RPZsandthedemandpositionindication system,theindividual RPIshavetobecalibrated.
TheRPZforeachindividual rodiscalibrated atthe~beginning ofafuelcyclewhenthereactorcoolantsystemisatoperating temperature.
Calibration isperformed atoperating temperature becausetheRPIsareextremely temperature sensitive andtherefore becomeincreasingly inaccurate overthelargetemperature changebetweenMODES5through3.Coiloperating temperature isnotestablished untiltheReactorCoolantSystem(RCS)reachesequilibrium afterascending throughMODES5,4,and3..Thecoiltakesapproximately six(6)hourstoreachequilibrium temperature, thusdelayingstartupofthereactor.Utilityexperience indicates thatthe(group)demandpositionindication systemshaveproventobeextremely reliableinWestinghouse reactors.
Demandpositionindication systemsarethemostaccuratemeansofdetermining rodpositionandareinfactusedtocalibrate theRPXs.Furthermore, theT/Ssrequirethatthereactorbemaintained inasubcritical, condition (k(0.99)topreventinadvertent criticality inMODES3,4,and5.Subcriticality canbeadequately maintained withsufficient boronconcentration andallbutoneshutdownorcontrolbankbeingfullyinserted.
Criticality isnormallynotreacheduntiltheshutdownbanksandthreeofthefourcontrolbanksarefullywithdrawn.
T/S3.10.5willcontinuetorequireonlyoneshutdownorcontrolbankbewithdrawn fromthefullyinsertedpositionatatime,duringroddroptimemeasurements.
Therefore, webelievethereisadequatejustification.
fortheproposedchange,whichwouldeliminate thedelayinstartup.Thischangemayresultinsomeincreasetotheprobability orconsequences ofaprev'ously analyzedaccidentormayreduceinsomewayasafetymargin,butitisourbeliefthattheresultsofthechangeareclearlywithinallacceptable criteriawithrespecttothesystemorcomponents astheymayaffecttheSafetyAnalysisoftheplant.Thus,theproposedchangedoesnotinvolveasignificant hazardsconsideration asdefinedin10CPR50.92.
Mr.HaroldR.DentonAEP:NRC:0860AATTACHMENT 3TOAEP:NRC:0860A REVISEDTECHNICAL SPECIFICATION PAGESFORTHESEVENTHANDEIGHTHPROPOSEDCHANGES}}

Revision as of 07:40, 29 June 2018

Application to Amend License DPR-74,revising Tech Specs Re Flowrate for Flow Balance Test of Safety Injection Pumps
ML17334A518
Person / Time
Site: Cook American Electric Power icon.png
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:
References
AEP:NRC:0860A, AEP:NRC:860A, NUDOCS 8403200210
Download: ML17334A518 (8)


Text

REGULATORY INOR@ATIONDISTRIBUTION SYSTEM(RIDS)ACCESSION NBR8403200210DUC~DATE84/03/15NOTARIZEDNOFACIL:50316DonaldC.CookNuclearPowerPlantiUnit2~IndianaAUTHINANEAUTHORAFFILIATION ALEXICH~M.P.

IndianaIlMichiganElectricCo~RECIP,NAME RECIPIENT AFFILIATION DENTONtH~REOfficeofNuclearReactorRegulationr Director

SUBJECT:

Application toamenaLicenseDPH-74<revising TechSpecsreflowratefortlowbalancetestofsafetyinjection pumps'ISTRIBUTIUN CODE:IE2cSCOPIESRECEIVED:LTR ENCLSIZE:TITLE!Start-UpReport/RefuelingReport(50Dkt).NOTES:DOCKET¹05000316RECIPIENT IDCODE/NAME NRRORB1BC04INTERNAL:

IEFILE01'RR/DHFS'DIR 08NRR/OSI/CPBCOPIESLTTRENCL3111'11RECIPIENT IDCODE/NAME

.NRR/DHFSDEPY07NRR/DHFS/PSRB11 Rf/DDAMI/MIB 09COPIESLTTRENCL1]1EXTERNAL; ACRSNRCPDRNTIS.130251111LPDRNSIC0305lgTOTALNUHBEHOFCOPIESREQUIRED:

LTTR~ENCLb INDIANA&MICHIGANELECTRICCOMPANYP.O.BOX16631COLUMBUS, OHIO43216March.15,1984AEP:NRC:0860A DonaldC.CookNuclearPlantUnitNo.2DocketNo.50-316LicenseNo.DPR-7'4AMENDMENT TOTHEAPPLICATION FORUNIT2TECHNZCAL SPECIFICATION CHANGESFORCYCLE5RELOADMr.HaroldR.Denton,DirectorOfficeofNuclearReactorRegulation U.,S.Nuclear.Regulatory Commission Washington, D.C.20555

DearMr.Denton:

Bythisletteranditsattachments, werequestanamendment totheapplication forTechnical Specification (T/S)changes,whichwasaddressed inourletterAEP:NRC:0860 datedMarch1,1984.Thisletterincludesadditional information relatedtotheseventhproposedchangeaddressed inAEP:NRC:0860; andrequestsoneadditional T/Schange.Thewordingoftheseventhchangehasbeenslightlymodifiedinthissubmittal tomakethechangeeasiertounderstand.

Attachment 1tothisletteraddresses theSignificant HazardsConsideration, asrequiredtobesubmitted by10CFR50.91(a)(1),forthemodifiedversionoftheseventhproposedchangeofletterAEP:NRC:0860.

Theseventhproposedchangeconcerned theflowratefortheflowbalancetestfortheSafetyIn'jection (SZ)pumps'heSIpumpflowratewouldbeaffectedbyplannedmodifications toincreasetheminiflowoftheSZpumps.Theincreased miniflowwouldprovideaddedassurance ofadequatepumpcoolingwhilethepumpisoperating butnotinjecting tothecore.Znordertomakethephysicalmodifications forthischangeonareasonable timetable,wearerequesting anearlyindication byMarch23,1984oftheacceptability ofthisT/Schangerequest.Attachment 2tothisletteraddresses theadditional T/Schangethatisbeingrequested aspartoftheUnit2Cycle5reloadapplication andourSignificant HazardsConsideration analysispursuantto10CFR50.92forthischange.Attachment 3tothislettercontainstherevisedpagesfortheadditional T/Schanges(including themodifiedversionoftheseventhchangeproposedinAEP:NRC:0860).

Thechangestotherevisedpagesare84032002l0 8403l5PDR*DOCK0500031hPPDRgrad>~.g~filee/I Mr.HaroldR.Dent~~AEP:NRC:0860A indicated byverticallinesontheright,handmaxginofthepage.TheT/Schangecontained inthisAttachment hasbeenreviewedandapprovedbythePlantNuclearSafetyReviewCommittee andwillbereviewedbytheAEPSCNuclearSafetyandDesignReviewCommittee (NSDRC)attheirnextscheduled meeting.Attachment 4tothisletteristhesummaryofthesafetyevaluation performed byWestinghouse tosupportanincreasefrom30gpmto60gpminthesafetyinjection pumpminiflow.Asrequiredby10CFR50.91(b)(1),

acopyof.thisamendedapplication isbeingtransmitted totheappropiiate officialoftheStateofMichigan.

Ourletter'EP:NRC:0860 transmitted theClassIVfeeleviedforthereviewoftheCycle5reloadofUnit2.WeconsidertheTechnical Specification changerequestscontained inthislettertobepartofthatx'eview.Therefox'e, webelievethatnofee,asdefinedin10CFR170.22,.isrequiredfortherequestsaddressed inthisletter.Thisdocumenthasbeenpreparedfollowing Corporate procedures whichincorporate a.reasonable setofcontrolstoinsureitsaccuracyandcompleteness priortosignature bytheundersigned.

Verytrulyyours,q5~M.P.exich4;~'VicePresident MPA/pbAttachments cc:JohnE.DolanW.G;'Smith, Ji.-BridgmanR.C.CallenG.CharnoffE.R.Swanson,NRCResidentInspector

-Bridgman Mr.HaroldR.DentonAEPNRC0860AATTACHMENT 1TOAEP:NRC:0860ASIGNIFICANT HAZARDSCONSIDERATICN FORCERNGEINFLCNRATEFORTHESAFEZYINJECTICN PUMPSFECNBALAN~TEST

'Mr.HaroldR.DentoAEP:NRC:0860A Theseventhproposedchangeaddressed inletterAEP:NRC:0860 requested thefootnote(**)onpage3/45-6forT/S4.5.2.hbechangedtoread:**TotalSIS(singlepump)flow,including miniflow/shallnotexceed700gpmwithnomorethan640gpmbeingdelivered tothecore.Werequestthatthisproposedchangebemodifiedforclarity,toread:**Combined Loop1,2,3,and4ColdLegFlow(singlepump)(640gpm.TotalSIS(singlepump)flow,including

miniflow, shallnotexceed700gpm.Theabovechangewillallowforincreased (miniflow) coolingoftheSafetyInjection pumpswhichprovidesincreased assurance ofadequate*pumpcoolingwhileusingminiflowcooling.Theincreaseinminiflowmayresultinasmalldecreasei:nflowfrom'thepumpstothecore.Westinghouse hasperformed asafetyevaluation oftheincreased SIpumpminiflowanddecreased injection flowtothecore.Thesummaryoftheirevaluation isenclosedasAttachment 4.Theresultsoftheirevaluation concluded thattheimpact'snegligible forlargebreakLOCAandan0increaseof86.1Finpeakcladtemperature (PCT)forthemostlimitingsmallbreakLOCA,basedonasensitivity analysisperformed onUnit1.TheadditionofthisincreaseinsmallbreakLOCAPCTtothecurrentD.C.CookUnit2smallbreakLOCAPCTof1668Fresultsina0valuewellbelowthe10CFR50.46limitof2200F.Basedondiscussions 0withyourstaff,weunderstand furtherinformation regarding theWestinghouse evaluation isneeded.Therefore, wewillsubmitadditional clarification oftheevaluation inthenearfuture.Wehavealsoperformed areviewoftheproposedflowrateontheintegrity oftheSIpumps.Ourreviewincludedacalculation todetermine theNetPositiveSuctionHead(NPSH)available totheSafetyInjection (SI)pumps.Inthecalculation weassumedthatSIwasintheinjection phaseandalignedwiththeRefueling WaterStorageTank(RWST);theRWSTwasatit'slowlowlevelsthewatertemperature was0100F;allsafetypumpswererunning(i.e.,ResidualHeatRemoval,Containment Spray,Centrifugal
Charging, andSIpumps);andallpumpswereproducing maximumflow.Webelievetheassumedconditions constitute theworstcaseconditions fortheSIpumps.Theresultsofthecalculation indicated thatwiththeaboveconditions, therewouldbeaNPSHmarginofoversixteen(16)feetforbothoftheSIpumps.Therefore, theincreased flowrateiswithinthesafetyboundsofthepumprunoutandhasnosignificant adverseeffectontheintegrity ofthepumps.Basedontheabove,theproposedT/Schangemayresultinsomeincreasetotheconsequences ofapreviously analyzedaccidentormayreduceinsomewayasafetymargin,butitisourbeliefthattheresultsofthechangeareclearlywi.thinallacceptable criteriawithrespecttothesystemandcomponent's astheymayaffecttheSafetyAnalysisoftheplant.Thustheproposedchangedoesnotinvolveasignificant hazardsconsideration asdefinedin10CFR50.92.

Mr.HaroldR.Dento-5-AEP:NRC:0860A ATTACHMENT 2TOAEP:NRC:0860A ADDITIONAL TECHNICAL SPECIFICATION CHANGEREQUESTFORDONALDC.COOKNUCLEARPLANTUNITNO.2CYCLE5 Mr.HaroldR.Den-6-AEP:NRC:0860A TheeighthproposedchangeconcernsT/S3/4.10.5whichaddresses theRodPositionIndication (RPI)Channelsduringshutdown(MODES3,4,and5).Specifically, wearerequesting thatT/S3/4.10.5bechangedtoaddressthedemandpositionindicators insteadoftheindividual RPXs.Thereasonsandjustification forthischangeareasfollows:T/S4.1.3.4requiresroddroptimemeasurements offulllengthrodsbedemonstrated

...following eachremovalofthereactorvesselhead,etc.T/S4.10.5statesrodpositionindication channelsshallbedetermined tobeOPERABLEbyverifying thedemandpositionindication systemandtherodpositionindication channelagreewithin12stepswithin24hourspriortothestartofroddroptimemeasurement...

Znordertoverifythe12stepagreement betweentheindividual RPZsandthedemandpositionindication system,theindividual RPIshavetobecalibrated.

TheRPZforeachindividual rodiscalibrated atthe~beginning ofafuelcyclewhenthereactorcoolantsystemisatoperating temperature.

Calibration isperformed atoperating temperature becausetheRPIsareextremely temperature sensitive andtherefore becomeincreasingly inaccurate overthelargetemperature changebetweenMODES5through3.Coiloperating temperature isnotestablished untiltheReactorCoolantSystem(RCS)reachesequilibrium afterascending throughMODES5,4,and3..Thecoiltakesapproximately six(6)hourstoreachequilibrium temperature, thusdelayingstartupofthereactor.Utilityexperience indicates thatthe(group)demandpositionindication systemshaveproventobeextremely reliableinWestinghouse reactors.

Demandpositionindication systemsarethemostaccuratemeansofdetermining rodpositionandareinfactusedtocalibrate theRPXs.Furthermore, theT/Ssrequirethatthereactorbemaintained inasubcritical, condition (k(0.99)topreventinadvertent criticality inMODES3,4,and5.Subcriticality canbeadequately maintained withsufficient boronconcentration andallbutoneshutdownorcontrolbankbeingfullyinserted.

Criticality isnormallynotreacheduntiltheshutdownbanksandthreeofthefourcontrolbanksarefullywithdrawn.

T/S3.10.5willcontinuetorequireonlyoneshutdownorcontrolbankbewithdrawn fromthefullyinsertedpositionatatime,duringroddroptimemeasurements.

Therefore, webelievethereisadequatejustification.

fortheproposedchange,whichwouldeliminate thedelayinstartup.Thischangemayresultinsomeincreasetotheprobability orconsequences ofaprev'ously analyzedaccidentormayreduceinsomewayasafetymargin,butitisourbeliefthattheresultsofthechangeareclearlywithinallacceptable criteriawithrespecttothesystemorcomponents astheymayaffecttheSafetyAnalysisoftheplant.Thus,theproposedchangedoesnotinvolveasignificant hazardsconsideration asdefinedin10CPR50.92.

Mr.HaroldR.DentonAEP:NRC:0860AATTACHMENT 3TOAEP:NRC:0860A REVISEDTECHNICAL SPECIFICATION PAGESFORTHESEVENTHANDEIGHTHPROPOSEDCHANGES