ML17321B033

Application for Amends to Licenses DPR-58 & DPR-74, Authorizing Extension of 72 H Time Limit for Loop Inoperability When Essential Svc Water Pump Out of Svc for Replacement or Repair.Fee Paid

ML17321B033
Person / Time
Site:	Cook
Issue date:	01/17/1986
From:	ALEXICH M P INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	DENTON H R Office of Nuclear Reactor Regulation
Shared Package
ML17321B034	List: ML17321B033 ML17321B035
References
AEP:NRC:0972, AEP:NRC:972, NUDOCS 8601220482
Download: ML17321B033 (10)

Text

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.il4l-li.&a4l-'"':I.'llFACIL:50-315 DonaldC.CookNuclearPoeerPlant>UnitiiIndiana50500031550-316DonaldC.CookNuclearPowerPlantiUnit2iIndiana505000316AUTH.NAMEAUTHORAFFILIATION ALEXICH,M.P.Indiana5MichiganElectricCo.RECIP.NAMERECIPIENlAFFILIATION DENTON>H.R;OfficeofNuclearReactorRegulationi Director(post851125SUHJECT:Application foramendstoLicensesDPR-588cDPR-74iauthorizing extension of72htimelimitforloopinoperability whenessential svceaterpumpoutofsvcforreplacement orrepair.Fee.paid.DISTRIBUTION CODE:A001DCOPIESRECEIVED:

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A."gg'E'tl~I,I~1-VL1(t')= INDIANA8MICHIGANELECTRICCOMPANYP,O,BOX16631COLUMBUS, OHIO43216January17,1986AEP:NRC:0972 DonaldC.CookNuclearPlantUnitNos.1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74TECHNICAL SPECIFICATION CHANGEREQUEST:ESSENTIAL SERVICEWATERPUMPINOPERABILITY TIMELIMITMr.HaroldR.DentonOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, DC20555

DearMr.Denton:

Thisletteranditsattachments constitute anapplication foramendment totheTechnical Specifications fortheDonaldC.CookNuclearPlantUnitNos.1and2.Werequestthatthisapplication beexpedited toavoidthepossibility ofanunwarranted unitshutdown.

Specifically, wearerequesting thatthe72-hourlimitforloopinoperability beextendedwhenanEssential ServiceWater(ESW)pumpisoutofserviceforrepairorreplacement.

Asacompensatory measure,weareproposing anadditional changetorequiretheotherthreeESWpumpstobeoperable(onepumpfromtheaffectedunitandtheothertwofromtheoppositeunitwiththeESWsystemalignedinthecross-tie mode).Thischangeisbeingrequested forbothunits.Forreasonsdescribed below,wemayrequirethischangeinordertoallowUnit1tocontinueoperation atpower.Wearerequesting anidentical changeforUnit2forconsistency betweenunits.In-service testingdatafortheUnit1WestESWpumphasindicated gradualdegradation inthepump'sperformance.

DatatakenonDecember23,1985indicated degradation tothepointwherepumpreplacement mayberequiredinthenearfutureandpriortoanyscheduled coldshutdownoutage.Wewouldprefertobeginthisreplacement bytheendofFebruary1986,toensurethatthepumpdoesnotfallbelowminimumperformance standards.

Inthelastfiveyears,fourUnit1ESWpumpreplacements havebeenperformed, ofwhichonewasinamodeinwhichtheESWpumpswererequiredtobeoperable.

Onthatoccasionthenecessary workwasaccomplished in60hours,whichiswithinthe72hoursallowedbytheActionStatement ofTechnical Specification 3.7.4.1.However,repairtimestwiceaslonghaveggagg20482

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I~l,rC,r'IC Mr.HaroldR.DentAEP:NRC:0972 beenexperienced whencomplications havearisen.Inallcaseswherepumprepairorreplacement isrequired, wewillproceedwithdiligence toreturnthepumptooperablestatusasrapidlyaspossibleandwithinthepresently allowed72hours.Basedonexperience, however,wefeelthatitisnecessary torequestthischangeinordertoavoidthepossibility ofaunitshutdown.

Ouranalysisconcerning significant hazardsconsiderations iscontained inAttachment 1tothisletter.TheproposedTechnical Specification pagesarecontained inAttachment 2.Webelievethattheproposedchangeswillnotresultin(1)asignificant changeinthetypesofeffluents orasignificant increaseintheamountsofanyeffluentthatmaybereleasedoffsite,or(2)asignificant increaseinindividual orcumulative occupational radiation exposure.

TheseproposedchangeshavebeenreviewedbythePlantNuclearSafetyReviewCommittee (PNSRC)andwillbereviewedbytheNuclearSafetyandDesignReviewCommittee (NSDRC)attheirnextregularly scheduled meeting.Incompliance withtherequirements of10CFR50.91(b)(1),

copiesofthisletteranditsattachments havebeentransmitted toMr.'.C.CallenoftheMichiganPublicServiceCommission andMr.G.Bruchmann oftheMichiganDepartment ofPublicHealth.Pursuantto10CFR170.12(c),

wehaveenclosedanapplication feeof$150.00fortheproposedamendments.

Thisdocumenthasbeenpreparedfollowing Corporate procedures whichincorporate areasonable setofcontrolstoinsureitsaccuracyandcompleteness priortosignature bytheundersigned.

Verytrulyyours,,M.P.AlexiVicePresident

[)I~~~Attachments cc:JohnE.DolanW.G.Smith,Jr.-BridgmanR.C.CallenG.Bruchmann G.CharnoffNRCResidentInspector

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ATTACHMENT 1TOAEP:NRC:0972 REASONSAND10CFR50.92ANALYSESFORCHANGESTOTHEDONALDC.COOKNUCLEARPLANTUNITNOS.1AND2TECHNICAL SPECIFiCATIONS

Attachment 1Technical Specification 3.7.4.1requiresthatatleasttwoindependent essential servicewater(ESW)loopsbeoperableinModes1through4.Theactionassociated withonlyoneindependent loopoperableallows72hourstorestoretheotherlooptooperablestatus.Inordertoperformroutinemaintenance necessary becauseofnormalpumpdegradation, itisnecessary tovoluntarily removeoneESWpumpfromservice.Toensurethatmaintenance isthoroughly performed, itmaybenecessary totakemoretimethanthe72hoursallowed.Thus,wearerequesting toaddafootnotetopages3/47-17(Unit1)and3/47-13(Unit2).Thefootnotewillallowcontinued poweroperation providedthatthreeESWpumpsareoperableandremainavailable toeitheroftheCookunits.TheBasessection(pageB3/47-4forbothunits)hasbeenrevisedtoreflectthischange.Asdescribed inSection9.8oftheUpdatedFSAR,theESWsystemcontainsfourpumpsthataresharedbetweentheunitsviacross-tie valves.TheESWsystemsuppliescoolingwaterfromLakeMichiganforthecomponent coolingheatexchangers, containment sprayheatexchangers, emergency dieselgenerators, andthecontrolroomairconditioning units.Additionally, theESWsystemprovidesabackupwatersourcefortheauxiliary feedwater pumps,shouldthecondensate storagetankbeunavailable orempty.AsseeninTable9.8-5oftheUpdatedFSAR,onlytwoofthefourESWpumpsarenecessary fordesign-basis conditions withbothunitsatpower.WehavealsostatedintheUpdatedFSARthatwehavethecapability toprovidesufficient ESWwatertoserviceaLOCAinoneunitwhiletheotherunitisundergoing cooldown.

Thelattercaserequiresthreepumpstoremovetheheatload,andisoutsidetheplantdesignbasis.(ThisisbecausethedesignbasisofCookestablishes hotshutdownasthesafecondition.)

Nevertheless, wewillrequirethreepumpstobeoperabletoensurewemaintainthecapability forunitcooldownbeyondthe'hotshutdowncondition.

Eventhoughthesechangesmayresultinanincreaseintheprobability ofoccurrence orconsequences ofapreviously analyzedaccident, theresultsar'eclearlywithinacceptable limitsasestablished intheD.C.CookFSAR.Wethusbelievethesechangesdonotinvolveasignificant hazardsconsideration asdefinedin10CFR50.92.Inaddition, aneditorial changehasbeenmadeononeoftheaffectedpages.InUnit2,pageB3/47-4,theword"emergency" hasbeenchangedtolowercasetoreflectthefactthatitisnotadefinedterm.