ML17332A720

Application for Amends to Licenses DPR-58 & DPR-74.Amends Would Modify TS 3/4.6.1.7 to Allow Limited Purge Operation in Modes 1,2,3 & 4 for Pressure Control,Alara & Respirable Air Quality Considerations

ML17332A720
Person / Time
Site:	Cook
Issue date:	03/31/1995
From:	FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17332A721	List: ML17332A720 ML17332A722
References
AEP:NRC:1185, NUDOCS 9504060198
Download: ML17332A720 (14)

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PR.ICDR.IMYCELERATEDRIDSPROCESSING)REGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9504060198DOC.DATE:95/03/31NOTARIZED:YESDOCKETFACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM0500031550-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATIONFITZPATRICK,E.IndianaMichiganPowerCo.(formerlyIndiana&MichiganEleRECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)SUBZECT:ApplicationforamendstolicensesDPR-58&DPR-74.Amends.wouldmodifyTS3/4.6.1.7toallowlimitedpurgeoperationinmodes1,2,3&4forpressurecontrol,ALARA&respirableairqualityconsiderations.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:RECIPIENTIDCODE/NAMEPD3-1LAHICKMAN,ZINTERNAL~FILECENTER~01'RR/DRCH/HICBNRR/DSSA/SRXBOGC/HDS2EXTERNAL:NOACCOPIESLTTRENCL111111111110RECIPIENTIDCODE/NAMEPD3-1PDNMSS/DWM/LLDPNRR/DSSA/SPLBNUDOCS-ABSTRACTNRCPDRCOPIESLTTRENCL1122111111NOTETOALL"RIDS'ECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPI-37(EXT.504-2083)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEEDlTOTALNUMBEROFCOPIESREQUIRED:LTTR13ENCL12 fll indianaMichiganPowerCompanyP.O.Box16631Columbus,OH43216i4arch31,1995AEP:NRC:1185DocketNos.:50-31550-316U.S.NuclearRegulatoryCommissionATTN:DocumentControlDeskWashington,D.C.20555Gentlemen:DonaldC.CookNuclearPlantUnits1and2PROPOSEDAMENDMENTTOTECHNICALSPECIFICATIONSECTION3/4.6.1.7FORCONTAINMENTPURGEREQUIREMENTSandThisletteranditsattachmentsconstituteanapplicationforamendmenttotheTechnicalSpecifications(T/Ss)forDonaldC.CookNuclearPlantUnits1and2.Specifically,weareproposingtomodifyT/Ss3/4.6.1.7,ContainmentVentilationSystem,anditsassociatedBases,toallowlimited(240hoursannually)purgeoperationinMODES1,2,3,and4forpressurecontrol,ALARAandrespirableairqualityconsiderations.Theproposedchangeswillenhanceourabilitytousethecontainmentpurgesystemtoreduceunnecessaiyhardshipsonplantpersonnelperformingactivitiesincontainment.Additionally,anincreaseinallowablepurgetimeisbeingrequestedtoaddressimprovementsinplantoperationsandcapacityfactors.Attachment1providesadetaileddescriptionoftheproposedchanges,thejustificationforthechanges,andou'rdeterminationofnosignificanthazardsconsiderationperformedpursuantto10CFR50.92.Attachment2containstheexistingT/Spagesmarkedtoreflecttheproposedchanges.Attachment3containstherevisedT/Spages.Webelievetheproposedchangeswillnotresultin(1)asignificantincreasein.theamounts,andnosignificantchangeinthetypesofanyeffluentthatmaybereleasedoffsite,or(2)asignificantincreaseinindividualorcumulativeoccupationalradiationexposure.TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommitteeandtheNuclearSafetyandDesignReviewCommittee.',9504060198950331PDRADDCK05000315PPDR'l)

~,s)f9f U.S.NuclearRegulatoryCommissionPage2AEP:NRC:1185Incompliancewiththerequirementsof10CFR50.91(b)(l),copiesofthisletteranditsattachmentshavebeentransmittedtotheMichiganPublicServiceCommissionandtotheMichiganDepartmentofPublicHealth.Sincerely,E.E.FitptrickVicePresidentSWORNTOANDSUBSCRIBEDBEFOREMETHIS~4~~DAYOFQQ~~I~1995/0NotaPublicMyCommissionExpires:~P-$'$'hAttachmentsCC:A.A.BlindG.CharnoffJ.B.MartinNFEMSectionChiefNRCResidentInspector-BridgmanJ.R.Padgett ATTACHMENT1TOAEP:NRC:1185DESCRIPTIONANDJUSTIFICATIONOFCHANGES10CFR50.92ANALYSISFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITS1AND2TECHNICALSPECIFICATIONS C~wI~w~g~

Attachment1toAEP:NRC:1185Page1I.ESCRIPTIONOFCHANGESTheproposedamendmenttoTechnicalSpecifications(T/Ss)3/4.6.1.7makesthefollowingspecificchangestotheCookNuclearPlantUnits1and2T/Ss:T/S3/4.6.1.7A.RevisestheLimitingConditionforOperationforspecification3/4.6.1.7(onpage3/46-9a)toredefinetheconditionsinwhichitispermissibletooperatethecontainmentpurgesystemwheninMODES1,2,3,and4.TheproposedLimitingConditionforOperationwouldbemodifiedtoread:"Thecontainmentpurgesupplyandexhaustisolationvalvesshallbeclosedexceptwhenoperationofthecontainmentpurgesystemisrequiredfor;pressurecontrol,ALARA,andrespirableairqualityconsiderationsforpersonnelentryandforsurveillancetestingandmaintenanceactivities."B.RevisetheBasesforspecification3/4.6.1.7(pageB3/46-2a)toreflecttheactivitieswhichallowpurginginMODES1,2,3,and4,asdefinedabove.Additionalchangestothebaseswillinclude,1)increasingtheallowablepurgetimefrom200to240hours,2)addingareferencetotheabilityofthepurgeisolationvalvestocloseagainstLOCAforces,therebyassuring10CFR100guidelinesaremaintained,and3)deleting"**"notescorrectedduringpreviousamendments.IX.JUSTIFICATIONFORCHANGEST/S3/4.6.1.7WeproposetochangethewordinginboththeLimitingConditionForOperationandtheBasesofT/S3/4.6.1.7toallowlimitedcontainmentpurgingwhileinMODES1,2,3,and4forreasonsotherthan"safetyrelatedreasons."Ascurrentlywritten,.useofthecontainmentpurgesystemduringMODES1,2,3,and4islimitedto"safetyrelatedreasons."Thesearedefinedas"theneedtoimprovecontainmentworkingconditions,e.g.,reduceairborneactivity,toperformsurveillanceand/ormaintenanceonasafety-relatedsystemorpieceofequipment."Additionally,purgeoperationislimitedto200hours,perthetechnicalspecificationbases.Therestrictivenessofthiswordingresultsinunnecessaryhardshiptooperators,maintenancetechnicians,instrumenttechnicians,andotherplantworkersperformingroutinetasksincontainment.Forexample,maintenanceactivitiesrelatedtotheuppercontainment

-aIne Attachment1toAEP:NRC:1185Page2ventilationsystemsandtheglycolfloorcoolingsystemrepresentrequiredactivitiesonequipmentwhichisnotcharacterizedas"safetyrelated."Achangetothespecificationwouldallowthelimiteduseofcontainmentpurgetoaddressadverseenvironmentalconditions(i.e.,temperature,humidity,and/orpressure),ALARAconcerns,andtoassurethatrespirableairqualityismaintained.Itshouldbenotedthattheuseofthepurgesystemtosupporttheaboveactivitieswouldberestrictedtooccasionswhentheexistingairfiltrationandtemperaturecontrolsystemswerenotsufficienttoprovideacontainmentatmospheresupportiveofworkingconditions.AnadditionalchangetoT/S3/4.6.1.7istoincreasethecurrentpurgelimitof200hoursperyearto240hours.Theoriginaltimelimitwascalculatedbasedonaunitcapacityfactorof77X.Asaresultoflongeroperatingcyclesandimprovedplantperformance,theCookNuclearPlantcapacityfactorisnowforecastedtobe93X.Utilizingthesamecalculationwhichestablishedthe200hourlimit,andincreasingthecapacityfactorto93Xyieldsavalueof240hours.ThisincreasedtimeallotmentreflectstheadditionaltimetheunitwillremaininMODES1,2,3,and4witha93Kcapacityfactor.Asstatedinthetechnicalspecificationbases,thecontainmentpurgesystematCookNuclearPlanthasbeendesignedinaccordancewithNRCBranchTechnicalPositionCBS6-4,Rev.1,anddemonstratedtobecapableofclosureagainstthedynamicforcesassociatedwithalossofcoolantaccident.Thepurgevalveswillreceiveacontainmentventilationisolationsignalonbothasafetyinjectionandhighradiationsignalsandclosewithin5seconds.InaccordancewiththeaboveBranchTechnicalPosition,thepotentialsiteboundarydoseswerecalculatedbasedontheoriginalanalysisusedtodeterminetheradiologicalconsequencesofalossofcoolantaccident.Theresultsofthisanalysisindicatedatotalthyroiddoseof165remforthe0-2hoursiteboundarydoseandawholebodydoseof9.32rem.Sincephysicalchangeswillnotresultfromtheproposedamendment,thesiteboundarydoesguidelinesof10CFR100(300remthyroidand25remwholebody)willnotbeexceededintheeventofanaccidentduringcontainmentpurgingoperations.Theadditionof40hoursofallowableannualpurgetimewillnotresultinasignificantincreaseintheamountofeffluentreleased.TheOffsiteDoseCalculationManual(ODCM)ensuresthatthedoserateatanytimeattheSITEBOUNDARYfromgaseouseffluentfromallunitsonthesitewillbewithintheannualdoselimitsofAppendixB,Table2,Column1of10CFR20forUNRESTRICTEDAREAS.Thesespecificationswillbestrictlyadheredtoduringanyreleaseviathepurgepathway.

Attachment1toAEP:NRC:1185Page3Inconclusion,webelievethattheproposedtechnicalspecificationswillnotaffectsystemcapabilityorintroduceanewordifferentmodeofpurgesystemoperationnotpreviouslyaddressedintheaboveanalysis.III.10CFR5092CRITERIAPer10CFR50.92,aproposedchangedoesnotinvolveasignificanthazardsconsiderationifthechangedoesnot:involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated,or3.involveasignificantreductioninamarginofsafety.CriteronThepurposeofthisamendmentistoallowflexibilityintheuseofthecontainmentpurgesystemduringMODES1,2,3,and4.Theuseofthissystemduringthesemodesofoperationhaspreviouslybeenapproved(AmendmentNo.66).Therefore,thisamendmentrequestdoesnotinvolvea,significantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluatedbecausetheproposedchange'otheT/Ssdoesnotaffecttheassumptions,parameters,orresultsofanyUFSARaccidentanalysis.Basedontheexistingsystemdesignanddemonstratedclosurecapabilityitisconcludedthattheproposedchangesdonotmodifytheresponseofthecontainmentduringadesignbasisaccident.Theproposedamendmentdoesnotaddormodifyanyexistingequipment.Basedontheseconsiderations,itisconcludedthatthechangesdonotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.Criterion2Theproposedchangedoesnotinvolvephysicalchangestotheplantorchangesintheplantoperatingconfiguration.Thus,itisconcludedthattheproposedchangedoesnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.

Attachment1toAEP:NRC:1185Page4Criterion3Themarginforsafetypresentlyprovidedisnotreducedbytheproposedchange.Asdiscussedpreviously,thecontainmentpurgevalveshavebeendesignedanddemonstratedcapableofclosureagainstthedynamicforcesresultingfromalossofcoolantaccident.Theproposedamendmentdoesnotimpacttheabilityofthepurgevalvestoperformtheirintended.function(i.e.achieveclosure)intheeventofanaccident.Basedontheseconsiderations,itisconcludedthatthechangesdonotinvolveasignificantreductioninamarginofsafety.IV.CONCLUSIONInconclusion,webelievethattheproposedchangedoesnotinvolvesignificanthazardsconsiderationsbecause,asdemonstratedinthepreviousdiscussions,operationoftheCookNuclearPlantinaccordancewiththechangeswouldnot:involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated,or3.involveasignificantreductioninamarginofsafety.

ATTACHMENT2TOAEP:NRC:1185EXISTINGTECHNICALSPECIFICATIONPAGESMARKEDTOREFLECTPROPOSEDCHANGES 4\~