IR 05000220/1985001

Responds to NRC 850402 Ltr Re Violations Noted in Insp Rept 50-220/85-01.Corrective Actions:Diesel engine-driven Fire Pump Circuits for Remote Manual Starting & Indication Modified

ML18038A018
Person / Time
Site:	Nine Mile Point
Issue date:	05/01/1985
From:	LEMPGES T E NIAGARA MOHAWK POWER CORP.
To:	EBNETER S D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8505290156
Download: ML18038A018 (16)

Text

VIMIIASAIRAUMNHAMKNIAGARAMOHAWKPOWERCORPORATION/300ERIEBOULEVARDWEST,SYRACUSE,N.Y.13202/TELEPHONE(315)474.1511May1,1985Mr.StuartD.Ebneter,DirectorDivisionofReactorSafetyU.S.NuclearRegulatoryCommissionRegionI631ParkAvenueKingofPrussia,Pennsylvania19406Re:NineMilePointUnit1DocketNo.50-220DPR-63

DearMr.Ebneter:

YourApril2,1985letteranditsattachmentprovidedtheresultsoftheJanuary21-25,1985inspectionconductedatNineMilePointUnit1.TheinspectionincludedthesafeshutdowncapabilityofNineMilePointUnit1intheeventofafire.Ourresponsestotheinspection'sDeviationandUnresolvedItemsaredetailedintheattachedreport.

Sincerely,NIAGARAMOHAWKPOWERCORPORATIONDAC/caAttachmentT.E.LempgesVicePre'sident,NuclearGenerationSiOi2VOi,iiSSOSOijPDRADOCK050002208PDR

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ATTACHMENTResonsetoInsection50-220/85-01SafeShutdownCaabilitsnteventoa>re1.0UnresolvedItem50-220/85-01,DeviationfromaLicensingCommitment1.1NRCDescription:AsaresultofaninspectionconductedonJanuary21-25,1985,andinaccordancewithNRCEnforcementPolicy(10CFR2,AppendixC)publishedintheFederalReistraronMarch8,1984(49FR8583)thefollowingdeviationfromalicensingcommitmentwasidentified:TheFinalSafetyAnalysisReport(FSAR),SectionX.K,paragraph4.0,statesthatallfireprotectioncomponentsaredesignedandinstalledinaccordancewiththeapplicablestandardsoftheNationalFireProtectionAssociation(NFPA).NFPAStandards20and803requirethatthedieselfirepumpbeseparatedfromtheelectricfirepumpbya3hourfirebarrier.Contrarytotheabove,thedieselfirepumpisnotseparatedfromtheelectricfirepumpinthattheircontrolcablesareinstalledinacommontraylocatedatelevation261feetoftheScreenandPumpHousewithoutanyfirebarrierseparationinbetween.NiagaraMohawkPowerCorporationisherebyrequestedtosubmittothisofficewithinthirtydaysofthedateoftheletterwhichtransmittedthisNotice,awrittenstatementorexplanationinreply,including:1)thecorrectivestepswhichhavebeentakenandtheresultsachieved;2)correctivestepswhichwillbetakentoavoidfurtherdeviations;and3)thedatewhenfullcompliancewillbeachieved.

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1.2Response:1.2.1Correctivestepswhichhavebeentakenandtheresultsachieved:Thedieselenginedrivenfirepumpcircuitsforremotemanualstartingandindicationwillbemodifiedbyinstallinginterposingrelaysandseparatelyfusingthecircuit.ThelossoftrayllTN2willrendertheelectricfirepumpinoperableandwillcauselossofonlyoneofthetwosourcesofcontrolpowerforthefirepumpcontroller.Theredundantunaffectedcontrolpowersupplyinconduitprimarilyruninthe261feetelevationfloorslabwouldprovidecontrolpowerforautomaticoperation(lowwaterpressure,lowairstart)orlocalmanualstartofthedieselenginedrivenfirepump.Additionally,approximatelyfourfeetofthatconduitnotruninthe261feetelevationfloorslabwillbeenclosedinathree-hourfirebarrier.Theredesigndescribedabovehasbeencompleted,exceptforthethree-hourenclosureforthepartiallyexposedconduit.InstallationiscurrentlyplannedtobecompletedbySeptember30,1985.

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1.2.2Correctivestepswhichwillbetakentoavoidfurtherdeviations:TheredesignofcontrolcircuitryforNineMilePointUnit1firepumpsisnotexpectedtooccuronacontinuingbasis.Ingeneral,however,modificationstothosesystemsdescribedinourFSAR,inaccordancewith10CFR50.59,requireaSafetyEvaluation.Thisevaluationincludesafireprotectionchecklist,andasnecessary,thischecklistisreviewedbyourFireProtectionSupervisor.1.2.3DatewhenfullcompliancewillbeachievedBythemodificationdescribedin1.2.1above,thedieselfirepumpandelectricalfirepumpcontrolcablesinstalledinacommontraylocatedintheScreenandPumpHousewi11beincompliancewiththeNFPA20and803separationcriteriabySeptember30,1985.2.0Unresolveditem50-220/85-01-02,AdequacyofFireProtectionforRedundantSafeShutdownTrainsinReactorBuilding2.1NRCDescription:Thelicenseeestablishedseveralfirebreakzones(FBZs)intheReactorBuildingtoprovide20feetofseparationbe'tweentheredundanttrainsofsafeshutdownsystemsinaccordancewithAppendixR,SectionIII.G.2.b.TheFBZsareprovidedwithautomatic

<<<<lI'"<<'l<<~~III,II't4~<<lPI<<,I'I'll4ii,,jlrftf.4-'<<*'~I~'4ll4)IIIf~~~IIII44,)!r)<<IcfI4,,",-"I,fj)jjljj.<<i4W4<<)il<<V)Il*4I'I'l<<<<IIl<<<<fIIf'lIftI<<<<t<<)fji<<~,>>'<<ll<<1f<<<<'l','<<)<<I<<<<4'lfI4<<Irhl'I'4')<<4,<<4<<g'I4'I4~Ili~""II,I<<4)t suppressionanddetection.TheFBZsaregenerallybutnotcompletelyfreeofinterveningcombustible,inthattheycontainsomelimitedamountofcombustiblessuchasflamasticcoatedcables.SmokedetectionisprovidedthroughouttheReactorBuilding.However,automaticsuppressionhasnotbeenprovidedthroughtheReactorBuilding,asclarifiedbyGenericLetter83-33.ByletterdatedDecember26,1983,thelicenseerequestedanexemptionforthelackofareawideautomaticsuppression.Subsequently,inanAppendixRLessonsLearnedRegionalWorkshopheldonApril18,1984,NRCprovidedadditionalclarificationthatlessthanfullareawidesuppressionanddetectionmayalsobeacceptableprovidedthatthelicenseeperformsanevaluationtojustifyitsadequacyandretainstheevaluationforsubsequentNRCaudits.Accordingly,thelicenseemadetherequiredevaluationandbyletterdatedMay11,1984,withdrewtheaboveexemptionrequest.Thelicensee'sevaluationincludedtechnicaljustificationfornotprovidingareawideautomaticsuppressionthroughouttheReactorBuildingandforthepresenceofinterveningcombustiblesintheFBZs.Theteamreviewedtheevaluationandfoundadditionalinformationwouldberequiredtoresolvethisitem.ThelicenseeverballycommittedtoprovidetheadditionalinformationtoNRR.ThisitemremainsunresolvedpendingreceiptandreviewoftheinformationandresolutionoftheissuebyNRR(50-220/85-01-02).

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-5-2.2Response:NiagaraMohawk'sFebruaryll,1985letteranditsattachmentsweresubmittedtoNRRprovidingtheadditionalinformationrequestedbytheinspectionteam.3.0UnresolvedItem50-220/85-01-03,SecurityModificationstoFireDoors3.1NRCDescription:Thelicenseehasprovided3-hourfireratedbarrierstoseparateredundantsafeshutdowntrainsinaccordancewithAppendixR,SectionIII.G.2.a.However,certain3-hourfirerateddoors(23doorswithSerialNumbers:D18,150,227,116,165,9,24,52-2,86,105,106,109,110-1,110,111-4,117,74,112,113,114,115,52,and56)installedinthebarriershavebeenmodifiedbytheinstallationsofsecurityhardware.Thesemodificationsmayhavedegradedthefireratingofthedoors.Thelicenseecouldnotprovidetheteamwithanevaluationoftheirfirerating.However,thelicenseecommittedtohavingUnderwritersLaboratories(UL)inspectthedoorsandmakeanevaluationandtoupgradetheratings,ifandwherenecessary.ThisisanunresolveditempendingcompletionoftheabovelicenseeactionanditsreviewbyNRC(50-220/85-01-03).

"cI)f.'w)'li'I'.)<<l.f'I'))fliver)afiQuillo.I))I);t;)i,'I)dl)e~,'W)W'w('.W)l'>')W<<rWW)WI')~WIrWII',)I'Ilj')II*IW)e)WWv,'i'I,"IJWW,Wf+J)',fIWjW~~Il'Wwl(w)),,)WlhWjr))')'l))W>>",'IWI"I.~'Wt-"...If,rC")l)WWI;)"'W1,W).>'I-':(iCI*"<<":iC~IWWIIf,WLW,IIICIfr)e)IIf>>'fIP'IW<<f)~w'I;>>)(1'll'"IWII"'~wJ,IWllhI"IrWWW('I'Wa,WI""II,)ilW'WW,.')'f~tl))*,IW)',.'W'I)>f",,Cf)()ll""f')ICWINDC"'?'I)wW 3.2Response:UnderwritersLaboratories(UL)inspectedtheNineMilePointUnit1ratedfiredoorsonMarch6and7,1985.ULinspectedapproximately215doors.Theycomparedtheirdesign,installationandconfigurationtoestablisheddesignandtestingcriteria.SeveralofthesedoorshavebeenidentifiedashavingpotentiallyinvalidULlabels.Therefore,thisreportalsoservestosatisfytherequirementsofourTechnicalSpecification,Sections3.6.10.1(d)and6.9.2(b).The23doorsidentifiedinyourfinding(85-01-03)wereincludedinthisinspection,exceptforthedoorwithserialnumber116.Thatdoorisnotrequiredtobeathree-hourfirerateddoor.NiagaraMohawkiscurrentlyevaluatingtheULreport.Thereportwillserveasabasisfordeterminingmodificationsofexistingdoors,furtherevaluationstojustifyexistingconfigurations,orteststojustifyexistingconfigurations.

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4.0UnresolvedItem50-220/85-01-04,EnhancementofIlluminationLevelt~~ProvidedbyEmergencyLighting4.1NRCDescription:0Thelicenseehasprovidedtherequiredemergencylightingtoallareasinspectedbytheteamamongtheseareasneededforoperationofthesafeshutdownequipmentandinaccessandegressroutesthereto.However,theteamfeltthatilluminationlevelprovidedbytheinstalledemergencylightingmaybemarginalinsomeoftheseareasandadditionalemergencylightingmaybedesirableforsafeshutdownoftheplantintheeventofafire.Thelicenseeagreedtostudytheneedforadditionallightingbyusingoperatorstowalkdownthesafeshutdownproceduresandcommittedtoprovideadditionallightingwherevernecessary.ThisisanunresolveditempendingcompletionoftheabovelicensingactionanditsreviewbyNRC(50-220/85-01-04).4.2Response:Preliminarywalkdownsanddesignsforadditionalemergencylightinghavebeencompletedbyourengineeringstaff.Keyareasofthesafeshutdownprocedureswillbewalkeddowntoassesstheneedforadditionalemergencylighting.Thesewalkdownswi11beperformedbyEngineeringwiththeassistanceofOperations,FireDepartmentandElectricalMaintenancepersonnel.Anyadditionalemergencylightingnecessarywi11beinstalledbyFebruary28,1986.nS

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