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{{#Wiki_filter:ACCELERATEDDOCUMENTDISTRIBUTIONSYSTEMREGULAT+INFORMATIONDISTRIBUTIO!YSTEM(RIDE)ACCESSIONNBR:9308200131DOC.DATE:93/08/13NOTARIZED:NODOCKET¹FACIL:50-315DonaldC.CookNuclearPowerPlant,Unit1,IndianaM05000315AUTH.NAMEAUTHORAFFILIATIONBREWER,S.J.IndianaMichiganPowerCo.BLINDFA.A.IndianaMichiganPowerCo.RECIP.NAMERECIPIENTAFFILIATION
{{#Wiki_filter:ACCELERATED DOCUMENTDISTRIBUTION SYSTEMREGULAT+INFORMATION DISTRIBUTIO!YSTEM (RIDE)ACCESSION NBR:9308200131 DOC.DATE:
93/08/13NOTARIZED:
NODOCKET¹FACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,IndianaM05000315AUTH.NAMEAUTHORAFFILIATION BREWER,S.J.
IndianaMichiganPowerCo.BLINDFA.A.
IndianaMichiganPowerCo.RECIP.NAME RECIPIENT AFFILIATION


==SUBJECT:==
==SUBJECT:==
LER93-010-01:on900824,routingofcableforUnits162notincompliancew/10CFR50,AppR.Initiatplantmodificationsforcablecompliance.Revcorrectserrorinidentifiedcontrolroominstrumentationduringfire.W/930813ltr.DISTRIBUTIONCODE:IE22TCOPIESRECEIVED:LTRENCLSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),IncidentRpt,etc.NOTES:RECIPIENTIDCODE/NAMEPD3-1LADEAN,WINTERNAL:ACNWAEOD/DSP/TPABNRR/DE/EELBNRR/DORS/OEABNRR/DRCH/HICBNRR/DRIL/RPEBR~QSSPLBGFIL02RGN3FILE01COPIESLTTRENCL1111221111111111111111RECIPIENTIDCODE/NAMEPD3-1PDAEOD/DOAAEOD/ROAB/DSPNRR/DE/EMEBNRR/DRCH/HHFBNRR/DRCH/HOLBNRR/DRSS/PRPBNRR/DSSA/SRXBRES/DSIR/EIBCOPIESLTTRENCL111122111111221111EXTERNALEGGGBRYCEFJ~HNRCPDRNSICPOOREFW~221111LSTLOBBYWARDNSICMURPHY,G.ANUDOCSFULLTXT111111NOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACI'HEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!FULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIESREQUIRED:LTTR30ENCL30 I'X IndianaMichiganPowerCompanyCookNuclearPlant~OneCookPlaceBridgman,Ml491066164655901lNDIAMANlCHletANPOWERAugust13,1993UnitedStatesNuclearRegulatoryCommissionDocumentControlDeskRockville,Maryland20852OperatingLicensesDPR-58DocketNo.50-315DocumentControlManager:Inaccordancewiththecriteriaestablishedby10CFR50.73entitledLicenseeEventReortSstemthefollowingreportisbeingsubmitted:90-010-01Sincerely,A.A.BlindPlantManager/sbAttachmentc:J.B.Martin,RegionIIIE.E.FitzpatrickP.A.BarrettR.F.KroegerW.E.Walters-Ft.WayneNRCResidentInspectorB.A.Wetzel-NRCM.R.PadgettG.Charnoff,Esp.D.HahnINPOS.J.BrewerB.A.Svensson;-OAi3~f'.9308200i3i9308i3PDRADOCK050003i58PDR NRCFORM366(569)VS.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORTILER)APPROVEDOMBNO.3)504)104EXPIRES:4I30I92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREGUESTt50.0HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(Pc)30).U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON,DC20555.ANDTOTHEPAPERWORKREDUCTIONPROJECT131500104),OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON,DC20503.FACILITYNAMElllD.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)PAE3)o5ooo31510(-05'''"10CFR50AppendixRDeficienciesResultinginPotentialLossofLocalShutdownIndicationPanelFunctionEVENTDATE(SILERNUMBERIS)REPORTDATE(7)OTHERFACILITIESINVOLVED(SlMONTHDAYYEARYEARSEQUENTIALr..epiNUMBERN'c>NUMSERMONTHOAYYEARFACILITYNAMESD.C.Cook-Unit2DOCKETNUMBERISI0500031608249090010008139305000OPERATINGMODEIS)jth'sxcNCi...Cv':POWERLEVEL'1ppy'v'0.402()t)20A05(el(1(0)20AOSleHI)(Q)20,405(sl(1)liiil20.405(4)(I)(lr)20.405(el(1)(r)20.405(c)BOM(e)II!50M(e)(2)50.73(el(2)ll)50.73(sl(2)Iiil50.73ls)(2)liiilLICENSEECONTACTFORTHISLER(12I50.73(ell2)lie)50,'73(s)(2)(r)50.73(s)(2)lr)I)50.73(~)(2)(xiii)IA)50.73(eI(2)ls)ill(5)50.73(~Il2)Ix)THISREPORTISSUBMITTEDPURSUANT70THERLDUIREMENTBof10cFR(i:IcsrcconrotmtNroitnrfottowinplIll73.71(o)73.71(clOTHERISpectiyinApttrectOrlowendinText,Hi)CForm36SAJNAMES.J.Brewer-NuclearSafety,LicensingandAssessment,ManagerTELEPHONENUMBERAREACODE614223-202COMPLETEONELINEFOREACHCOMPONENTFAILUREDESCRIBEDINTHISREPORTl13)CAUSESYSTFMCOMPONENTMANUFAC.TVREREPORTABLETONPRDSCAUSESYSTEMCOMPONENTMANUFAC.TVREREPORTABLTONPRDS5~8%SKI&SVPPLEMENTALREPORTEXPECTED(14)YESIifyet,compirteEXPECTEDSVS4IISSIOHDATfiNOABSTRACTILlmitto14IX)tprcrt,i.r.,rppmximetriyfifteensinplrg>>crtyprwn'ttrnimrslIIS)EXPECTEDSUBMISSIONDATEIISIMONTHDAYYEARThepurposeoftherevisionistocorrectanerrorintheidentifiedcontrolroominstrumentationavailableduringafireinUnit2firearea29.TherevisionalsoisinresponsetoacommitmentinLER50-316f93-005dated-5/20/93.ThecommitmentinLER50-316893-005wastorevisethisLERuponre-evaluationoftheAppendixRcompliancestrategyforthesub)ectfireareas.OnAugust24,1990,withUnit1operatingat100percentpowerandUnit2inModeSix,itwasdiscoveredthattheroutingofcableassociatedwiththeUnit1LocalShutdownIndication(LSI)panelswasnotincompliancewith10CFR50AppendixR.OnSeptember6,1990,i.twassubsequentlydi.scoveredthatasimi.larconditionexistedfortheUnit2LSIpanels.Theimmediatecorrectiveactiontakenwasinitiationofplantmodi.ficationstobringthesubjectplantcablingintocompliancewith10CFR50AppendixR.AllidentifiedareasareprovidedwithadequatefiredetectionandsuppressiontosubstantiallymitigatetheimpactofafireonnormalandLSIinstrumentation.Therefore,thiseventdidnotadverslyimpactthehealthandsafetyofthepublic.NRCFottn365(569)
LER93-010-01:on 900824,routing ofcableforUnits162notincompliance w/10CFR50,App R.Initiat plantmodifications forcablecompliance.Rev correctserrorinidentified controlroominstrumentation duringfire.W/930813 ltr.DISTRIBUTION CODE:IE22TCOPIESRECEIVED:LTR ENCLSIZE:TITLE:50.73/50.9 LicenseeEventReport(LER),IncidentRpt,etc.NOTES:RECIPIENT IDCODE/NAME PD3-1LADEAN,WINTERNAL:
NRCFORM344A(4$9)U.S.NUCLEARAEGULATOAYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONAPPAOVEDOMBNO.S(500(05EXPIRES:el30N2ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREOUESTI500HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCHIP430).U.S.NUCLEARREGULATORYCOMMISSION.WASHINGTON,DC20555,ANDTOTHEPAPERWORKREDUCTIONPROJECT(3(5041041.OFFICEOFMANAGEMENTANDBUDGET,WASHINGTON,OC20503.FACILITYNAME(1)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)YEARLERNUMBER(4155GVCNTIALr(2NVMIIEVISIONNVM5OPAGE(3)TEXTlllmoreepecelrrer)o(red.IreeeddldormlllRC%%drm35EABI(12)o5ooo315900100102OF05CoditionsPriortoOccurrenceUnit1inMode1at100percentRatedThermalPowerUnit2inMode6.DescritionofEventOnAugust24,1990,itwasdiscoveredthattheroutingofcablesassociatedwiththeUnit1LocalShutdownIndication(LSI)panelswasnotincompliancewith10CFR50AppendixRrequirements.ApostulatedfireinanyofthreeUnit1fireareascouldhaveresultedinaninabilitytomaintainpowertotheLSIpanels.The.followingdescribestheanalysisperformed.Unit1FireAreas40(Zone41),48(Zone55),and49(Zone56).TheareaanalysesperformedidentifiedthatafireinanyoneofthesefireareascouldhaveeliminatedboththeUnit1andUnit2powertotheLocalShutdownIndication(LSI)panels.Thediscrepantcableinquestionwascable1-29685G(EIIS/ED-CBL3)whichrunsbetweenpanels1-LSI-6and1-LSI-6X.AfaultofthiscableduetoafirewouldhaveeliminatedtheUnit2Alternatefeed-totheUnit1LSIpanels.TheUnit1normalpowerfeedtotheLSIpanelswasalreadyassumedlostforafireinanyoftheseareasbecausevariouscablesassociatedwiththeavailabilityofMCC1-ABC-Bwouldhavebeenlost.OnSeptember6,1990,itwassubsequentlydiscoveredthatasimilarconditionexistedfortheUnit2LSIpanels.ApostulatedfireinoneoftheUnit2fireareascouldhaveresultedinaninabilitytomaintainpowertotheLSIpanels.Thefollowingdescribestheanalysisperformed.Unit2FireArea29(Zones24,25)Theareaanalysesperformedidentified-thatafireinFireZone24wouldhavefaultedboththeUnit1andUnit2powertotheLSIpanels.ThediscrepantpowersourcetotheUnit2LSIpanelsrunsinFireZone24whichalsocontainstheUnit2normalsourcecable2-12467(EIIS/ED-CBL3).Although2-12467alsorunsinZone25,1-1936Rdoesnot.FireZones24and25areseparatedbyathree-hourfire-ratedwall.NRCForm344A(509)
ACNWAEOD/DSP/TPAB NRR/DE/EELB NRR/DORS/OEAB NRR/DRCH/HICB NRR/DRIL/RPEB R~QSSPLBGFIL02RGN3FILE01COPIESLTTRENCL1111221111111111111111RECIPIENT IDCODE/NAME PD3-1PDAEOD/DOAAEOD/ROAB/DSP NRR/DE/EMEB NRR/DRCH/HHFB NRR/DRCH/HOLB NRR/DRSS/PRPB NRR/DSSA/SRXB RES/DSIR/EIB COPIESLTTRENCL111122111111221111EXTERNALEGGGBRYCEFJ~HNRCPDRNSICPOOREFW~221111LSTLOBBYWARDNSICMURPHY,G.A NUDOCSFULLTXT111111NOTETOALL"RIDS"RECIPIENTS:
NRCFORM35SA)509)ILS.NUCLEARREQULATORYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONAPPROVED0MBNO.31504)0>>EXPIRES:>>/30/92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREQUEST.'00HRS.FORWARDCOMMENTSREGARDINGBURDENESTIMATETOTHERECORDSANDREPORTSMANAQEMENTBRANCH(P430),U.S.NUCLEARREQULATORYCOMMISSION,WASHINQTON,DC20555,ANDTOTHEPAPERWORKREDUCTIONPROJECT(3150410i).OFFICEOFMANAQEMENTANDBUDGET,WASHINQTON,DC20503.FACILITYNAME11)D.C.CookNuclearPlant-Unit1DOCKETNUMBER12)o5ooo315LERNUMBER15)YEAR<~SEQUENTIAL)~AEVI>>ION>0?3NUM>>II.sW:NUMB>>A90-010-01~AOEC))03oF05TEXT///mor>><<ec>>4r>>r/unrLu>>>>>>~Ar/ICformSr/SAS/(illCauseofEventTheconditionwastheresultofinsufficientscopingfor10CFR50AppendixRdesignchanges.Insufficientcontrolswereinplacetoensurethatnewcablesaddedtotheplantcompliedwith10CFR50AppendixRrequirements.nalsisofEventThiseventisbeingreportedinaccordancewith10CFR50.73(a)(2)(ii)(B)and10CFR50.73(a)(2)(ii)(C)inthattheconditionwasoutsidethedesignbasisandnotcoveredbytheplant's.operatingandemergencyproceduresrespectively.Unit1FireAreas40,48and49AnalysisFireArea402OurSafeShutdownSystemAnalysis(SSSA)showsthatforafireinArea40controlroomindicationsequivalenttothosefoundontheLSIcabinetwouldbelost.Duetocablemisrouting,theLSIpanelindicationswouldalsohavebeenlost.FurtherinvestigationrevealedthereasonthatthecontrolroomindicationwouldhavebeenlostisbecauseoneofthealternatesourcestotheCRIDpanels,theisolimeters,islocatedinthisarea.WhattheSSSAdoesnotshowisthatthepreferredsourcetotheGRIDpanelswouldhavebeenavailable.TheinvertersarelocatedinFireArea41(FireZone42C).Therefore,normalcontrolroomindicationofprocessmonitoringwouldhavebeenavailableforfireinArea40.b.FireAreas48and492Underconservativeassumptionsoflossoffunctionforanareafire,theSSSAshowsthatforafireinAreas48and49boththecontrolroomandtheLSIpanelindicationswouldhavebeenlost.However,FireAreas48and49areprovidedwithadequatesuppressionanddetectiontosubstantiallymitigatetheimpactonnormalandLSIinstrumentation.NRCForm356A15$9)
PLEASEHELPUSTOREDUCEWASTE!CONTACI'HE DOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)
NRCFORM388A(889)U.S.NUCLEARREGULATORYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONAPPROVEDOMBNO.3)504)08EXPIRES:O)30NQESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREQUEST:50J)HRS.FORWARDCOMMENTSREQARDINQBURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENTBRANCH(P430).U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON,OC20555,ANDTOTHEPAPERWORKREDUCTIONPROJECT(31504104),OFFICEOFMANAGEMENTANOBUDGET,WASHINGTON,DC20503.FACILITYNAME(1)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)LERNUMBER(8)YEARI))OISSQUSNTIALg~ASVISIQNPAIIUMSII'ANUMSII~AQEI3)TEXTlitmonJOoco*roOIdmd.usooddldooolHRCFomI388AQJ(17)ooooo31590010-01040"05AnalsisofEventUnit2FireArea29(Zones24and25)Analysis:AlthoughpowertotheLSIpanelswouldbelostforafireinzone24,necessarycontrolroomindicationwouldstillhavebeenavailablewiththeexceptionofRCStemperature(RCScoldlegtemperaturecouldhavebeenderivedindirectlyfromtheavailablesteamgeneratorpressureinstrumentation.AccordingtoourSafeShutdownSystemsAnalysis,afireinFireArea29(Zones24and25)wouldnothaveeliminatedprocessmonitoringindicationinthecontrolroomforsteamgenerators1and4.ThefollowingindicationwouldhavebeenavailableintheUnit2controlroom:2-BLP-1122-BLP-1422-MPP-2102-MPP-2402-M312-NLP-151or2-NLP-1532-NPS-121SG1WaterLevel(normalrange)SG4WaterLevel(normalrange)SG1PressureSG4PressureSourceRangeMonitoringChannel1PressurizerWaterLevelRCSPressure(widerange)**Subsequentinvestigationindicatesthat2-NPS-121wouldnothavebeenavailablesincethecablefor2-NPS-121wasunprotectedandisalsoroutedthroughzone24.Lossof2-NPS-121duringapotentialfireinzone24couldhavebeencompensatedforthroughtheuseofacontingencyprocedurewithintheemergencyoperatingprocedures.ThisprocedureprovidedfortheuseoftestinstrumentsconnectedtotheRVLIScabinetinthecontrolroomtoreadRCSpressure.Controlroomoperatorsweretrainedontheuseofthisprocedure.TheseindicationscouldprovideanindirectmeansofdeterminingRCStemperature.ThisareaisprovidedwithadequatedetectionandsuppressiontosubstantiallymitigatetheimpactonnormalandLSIinstrumentation.NR0FomI388A(589)
TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!FULLTEXTCONVERSION REQUIREDTOTALNUMBEROFCOPIESREQUIRED:
NRCFORM355A(549)U.S.NUCLEARAEGULATOAYCOMMISSIONLICENSEEEVENTREPORT(LER)TEXTCONTINUATIONAPPAOVEO0MBNO.31504'105EXPIRES(tl30/92ESTIMATEDBURDENPERRESPONSETOCOMPLYWTHTHISINFORMATIONCOLLECTIONREQUEST:508)HRS.FORWARDCOMMENTSREGARDINGBUADENESTIMATETOTHERECOAOSANDREPORTSMANAGEMENTBRANCH(P4301,U.S.NUCLEARREGULATORYCOMMISSION,WASHINGTON,OC20555,ANDTOTHEPAPERWORKAEDUCTIONPROJECT(31504)04),OFFICEOFMANAGEMENTANOBUDGET.WASHINGTON,DC20503.FACILITYNAME(I)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)YEARLERNUMBER(5)ttQVtNTIALNVMtRRtVI510NNVMtRPAGEIS)TEXTllfmcttSottolttNFdctd,ototddidootlNRCFoml&#xc3;)4'tl(17)05000315900100105oFo5ConclusionInconclusion,theconditiondidnotadverselyimpactthehealthandsafetyofthepublicduetothefactthatAreas40,48and49ofUnit1andArea29ofUnit2andprovidedwithsuppressionanddetectiontosubstantiallymitigatetheimpactonnormalandLSZinstrumentation.Also,alargeportionofthestation'snormalinstrumentationwouldremainfunctionalsincefirespropagateatafiniteratherthancausinganinstantaneouslossoffunctionforanentirearea.CorrectiveActionsUnitOneAplantTemporaryModificationwasinitiatedwhichinstalleda1amperefusein1-LSI-6ontheloadsideofthe1>>29685Gcable.ThiswayafireinthefireareasofconcernwouldnoteliminatetheabilityofprovidingUnit2powertotheLSIpanels.~UktTeeAplantMinorModificationwasinitiatedtoprovideaone-hourfireenclosure(wrapped)aroundConduit2-12467thatexistsinFireZone24.Conduit2-12467wasin10CFR50AppendixRcomplianceon9/20/90.Subsequentinvestigationhasrevealedthatwhenmodifications2900-B.04(October5,1990)and12-3053(December19,1990)werecompleted/installedthesub)ectcablenolongerneededtobewrappedbecausezone24couldnowbecategorizedasmeetingAppendixRZIZ.G.1criteriaduetotheinstallationofadditionalinstrumentation.Znaddition,thereissuppressionanddetectioninthearea.~GeeralOurprogramforensuringcontinued10CFRSOAppendixRcompliancewillberevised.ItisanticipatedthatthisrevisionwillbeinplacebyMarch1,1991.FailedComonentIdentificationNonePreviousSimilarEvents050"315/90-008310CFR50AppendixRdeficienciesresultinginpotentiallossofauto-startofservicewaterpumpsduetoincorrectimplementationofdesignchange.NRCFonll35SA(589)}}
LTTR30ENCL30 I'X IndianaMichiganPowerCompanyCookNuclearPlant~OneCookPlaceBridgman, Ml491066164655901lNDIAMANlCHletAN POWERAugust13,1993UnitedStatesNuclearRegulatory Commission DocumentControlDeskRockville, Maryland20852Operating LicensesDPR-58DocketNo.50-315DocumentControlManager:Inaccordance withthecriteriaestablished by10CFR50.73entitledLicenseeEventReortSstemthefollowing reportisbeingsubmitted:
90-010-01 Sincerely, A.A.BlindPlantManager/sbAttachment c:J.B.Martin,RegionIIIE.E.Fitzpatrick P.A.BarrettR.F.KroegerW.E.Walters-Ft.WayneNRCResidentInspector B.A.Wetzel-NRCM.R.PadgettG.Charnoff, Esp.D.HahnINPOS.J.BrewerB.A.Svensson;-OAi3~f'.9308200i3i 9308i3PDRADOCK050003i58PDR NRCFORM366(569)VS.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)APPROVEDOMBNO.3)504)104 EXPIRES:4I30I92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REGUESTt50.0HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(Pc)30).U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555.ANDTOTHEPAPERWORK REDUCTION PROJECT131500104),
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAMElllD.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)PAE3)o5ooo31510(-05'''"10CFR50AppendixRDeficiencies Resulting inPotential LossofLocalShutdownIndication PanelFunctionEVENTDATE(SILERNUMBERIS)REPORTDATE(7)OTHERFACILITIES INVOLVED(SlMONTHDAYYEARYEARSEQUENTIAL r..epiNUMBERN'c>NUMSERMONTHOAYYEARFACILITYNAMESD.C.Cook-Unit2DOCKETNUMBERISI 0500031608249090010008139305000OPERATING MODEIS)jth'sxcNCi...Cv':
POWERLEVEL'1ppy'v'0.402()t) 20A05(el(1 (0)20AOSleHI)(Q)20,405(sl(1) liiil20.405(4)(I)(lr)20.405(el(1)(r)20.405(c)
BOM(e)II!50M(e)(2)50.73(el(2) ll)50.73(sl(2)
Iiil50.73ls)(2)liiilLICENSEECONTACTFORTHISLER(12I50.73(ell2)lie)50,'73(s)
(2)(r)50.73(s)(2)lr)I)50.73(~)(2)(xiii)
IA)50.73(eI(2)ls)ill(5)50.73(~Il2)Ix)THISREPORTISSUBMITTED PURSUANT70THERLDUIREMENTB of10cFR(i:IcsrcconrotmtNroitnrfottowinpl Ill73.71(o)73.71(clOTHERISpectiyinApttrectOrlowendinText,Hi)CForm36SAJNAMES.J.Brewer-NuclearSafety,Licensing andAssessment, ManagerTELEPHONE NUMBERAREACODE614223-202COMPLETEONELINEFOREACHCOMPONENT FAILUREDESCRIBED INTHISREPORTl13)CAUSESYSTFMCOMPONENT MANUFAC.TVREREPORTABLE TONPRDSCAUSESYSTEMCOMPONENT MANUFAC.TVREREPORTABLTONPRDS5~8%SKI&SVPPLEMENTAL REPORTEXPECTED(14)YESIifyet,compirteEXPECTEDSVS4IISSIOH DATfiNOABSTRACTILlmitto14IX)tprcrt,i.r.,rppmximetriy fifteensinplrg>>crtyprwn'ttrn imrslIIS)EXPECTEDSUBMISSION DATEIISIMONTHDAYYEARThepurposeoftherevisionistocorrectanerrorintheidentified controlroominstrumentation available duringafireinUnit2firearea29.Therevisionalsoisinresponsetoacommitment inLER50-316f93-005dated-5/20/93.Thecommitment inLER50-316893-005wastorevisethisLERuponre-evaluation oftheAppendixRcompliance strategyforthesub)ectfireareas.OnAugust24,1990,withUnit1operating at100percentpowerandUnit2inModeSix,itwasdiscovered thattheroutingofcableassociated withtheUnit1LocalShutdownIndication (LSI)panelswasnotincompliance with10CFR50AppendixR.OnSeptember 6,1990,i.twassubsequently di.scovered thatasimi.larcondition existedfortheUnit2LSIpanels.Theimmediate corrective actiontakenwasinitiation ofplantmodi.fications tobringthesubjectplantcablingintocompliance with10CFR50AppendixR.Allidentified areasareprovidedwithadequatefiredetection andsuppression tosubstantially mitigatetheimpactofafireonnormalandLSIinstrumentation.
Therefore, thiseventdidnotadverslyimpactthehealthandsafetyofthepublic.NRCFottn365(569)
NRCFORM344A(4$9)U.S.NUCLEARAEGULATOAY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPAOVEDOMBNO.S(500(05 EXPIRES:el30N2ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUESTI500HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCHIP430).U.S.NUCLEARREGULATORY COMMISSION.
WASHINGTON, DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(3(5041041.
OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, OC20503.FACILITYNAME(1)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)YEARLERNUMBER(4155GVCNTIAL r(2NVMIIEVISION NVM5OPAGE(3)TEXTlllmoreepecelrrer)o(red.
Ireeeddldorml llRC%%drm35EABI(12)o5ooo315900100102OF05CoditionsPriortoOccurrence Unit1inMode1at100percentRatedThermalPowerUnit2inMode6.DescritionofEventOnAugust24,1990,itwasdiscovered thattheroutingofcablesassociated withtheUnit1LocalShutdownIndication (LSI)panelswasnotincompliance with10CFR50AppendixRrequirements.
Apostulated fireinanyofthreeUnit1fireareascouldhaveresultedinaninability tomaintainpowertotheLSIpanels.The.following describes theanalysisperformed.
Unit1FireAreas40(Zone41),48(Zone55),and49(Zone56).Theareaanalysesperformed identified thatafireinanyoneofthesefireareascouldhaveeliminated boththeUnit1andUnit2powertotheLocalShutdownIndication (LSI)panels.Thediscrepant cableinquestionwascable1-29685G(EIIS/ED-CBL3) whichrunsbetweenpanels1-LSI-6and1-LSI-6X.
Afaultofthiscableduetoafirewouldhaveeliminated theUnit2Alternate feed-totheUnit1LSIpanels.TheUnit1normalpowerfeedtotheLSIpanelswasalreadyassumedlostforafireinanyoftheseareasbecausevariouscablesassociated withtheavailability ofMCC1-ABC-Bwouldhavebeenlost.OnSeptember 6,1990,itwassubsequently discovered thatasimilarcondition existedfortheUnit2LSIpanels.Apostulated fireinoneoftheUnit2fireareascouldhaveresultedinaninability tomaintainpowertotheLSIpanels.Thefollowing describes theanalysisperformed.
Unit2FireArea29(Zones24,25)Theareaanalysesperformed identified-thatafireinFireZone24wouldhavefaultedboththeUnit1andUnit2powertotheLSIpanels.Thediscrepant powersourcetotheUnit2LSIpanelsrunsinFireZone24whichalsocontainstheUnit2normalsourcecable2-12467(EIIS/ED-CBL3).
Although2-12467alsorunsinZone25,1-1936Rdoesnot.FireZones24and25areseparated byathree-hour fire-rated wall.NRCForm344A(509)
NRCFORM35SA)509)ILS.NUCLEARREQULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPROVED0MBNO.31504)0>>
EXPIRES:>>/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST.'00 HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAQEMENT BRANCH(P430),U.S.NUCLEARREQULATORY COMMISSION, WASHINQTON, DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(3150410i).
OFFICEOFMANAQEMENTANDBUDGET,WASHINQTON,DC20503.FACILITYNAME11)D.C.CookNuclearPlant-Unit1DOCKETNUMBER12)o5ooo315LERNUMBER15)YEAR<~SEQUENTIAL
)~AEVI>>ION>0?3NUM>>II.sW:NUMB>>A90-010-01~AOEC))03oF05TEXT///mor>><<ec>>4r>>r/unrLu>>>>>>~Ar/ICformSr/SAS/(illCauseofEventThecondition wastheresultofinsufficient scopingfor10CFR50AppendixRdesignchanges.Insufficient controlswereinplacetoensurethatnewcablesaddedtotheplantcompliedwith10CFR50AppendixRrequirements.
nalsisofEventThiseventisbeingreportedinaccordance with10CFR50.73 (a)(2)(ii)(B) and10CFR50.73 (a)(2)(ii)(C) inthatthecondition wasoutsidethedesignbasisandnotcoveredbytheplant's.operating andemergency procedures respectively.
Unit1FireAreas40,48and49AnalysisFireArea402OurSafeShutdownSystemAnalysis(SSSA)showsthatforafireinArea40controlroomindications equivalent tothosefoundontheLSIcabinetwouldbelost.Duetocablemisrouting, theLSIpanelindications wouldalsohavebeenlost.Furtherinvestigation revealedthereasonthatthecontrolroomindication wouldhavebeenlostisbecauseoneofthealternate sourcestotheCRIDpanels,theisolimeters, islocatedinthisarea.WhattheSSSAdoesnotshowisthatthepreferred sourcetotheGRIDpanelswouldhavebeenavailable.
Theinverters arelocatedinFireArea41(FireZone42C).Therefore, normalcontrolroomindication ofprocessmonitoring wouldhavebeenavailable forfireinArea40.b.FireAreas48and492Underconservative assumptions oflossoffunctionforanareafire,theSSSAshowsthatforafireinAreas48and49boththecontrolroomandtheLSIpanelindications wouldhavebeenlost.However,FireAreas48and49areprovidedwithadequatesuppression anddetection tosubstantially mitigatetheimpactonnormalandLSIinstrumentation.
NRCForm356A15$9)
NRCFORM388A(889)U.S.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPROVEDOMBNO.3)504)08EXPIRES:O)30NQESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:50J)HRS.FORWARDCOMMENTSREQARDINQ BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P430).U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, OC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(31504104),
OFFICEOFMANAGEMENT ANOBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)LERNUMBER(8)YEARI))OISSQUSNTIALg~ASVISIQN PAIIUMSII'ANUMSII~AQEI3)TEXTlitmonJOoco*roOIdmd.
usooddldoool HRCFomI388AQJ(17)ooooo31590010-01040"05AnalsisofEventUnit2FireArea29(Zones24and25)Analysis:
AlthoughpowertotheLSIpanelswouldbelostforafireinzone24,necessary controlroomindication wouldstillhavebeenavailable withtheexception ofRCStemperature (RCScoldlegtemperature couldhavebeenderivedindirectly fromtheavailable steamgenerator pressureinstrumentation.
According toourSafeShutdownSystemsAnalysis, afireinFireArea29(Zones24and25)wouldnothaveeliminated processmonitoring indication inthecontrolroomforsteamgenerators 1and4.Thefollowing indication wouldhavebeenavailable intheUnit2controlroom:2-BLP-112 2-BLP-142 2-MPP-210 2-MPP-240 2-M312-NLP-151 or2-NLP-153 2-NPS-121 SG1WaterLevel(normalrange)SG4WaterLevel(normalrange)SG1PressureSG4PressureSourceRangeMonitoring Channel1Pressurizer WaterLevelRCSPressure(widerange)**Subsequent investigation indicates that2-NPS-121 wouldnothavebeenavailable sincethecablefor2-NPS-121 wasunprotected andisalsoroutedthroughzone24.Lossof2-NPS-121 duringapotential fireinzone24couldhavebeencompensated forthroughtheuseofacontingency procedure withintheemergency operating procedures.
Thisprocedure providedfortheuseoftestinstruments connected totheRVLIScabinetinthecontrolroomtoreadRCSpressure.
Controlroomoperators weretrainedontheuseofthisprocedure.
Theseindications couldprovideanindirectmeansofdetermining RCStemperature.
Thisareaisprovidedwithadequatedetection andsuppression tosubstantially mitigatetheimpactonnormalandLSIinstrumentation.
NR0FomI388A(589)
NRCFORM355A(549)U.S.NUCLEARAEGULATOAY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPAOVEO0MBNO.31504'105 EXPIRES(tl30/92 ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:508)HRS.FORWARDCOMMENTSREGARDING BUADENESTIMATETOTHERECOAOSANDREPORTSMANAGEMENT BRANCH(P4301,U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, OC20555,ANDTOTHEPAPERWORK AEDUCTION PROJECT(31504)04),
OFFICEOFMANAGEMENT ANOBUDGET.WASHINGTON, DC20503.FACILITYNAME(I)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)YEARLERNUMBER(5)ttQVtNTIAL NVMtRRtVI510NNVMtRPAGEIS)TEXTllfmcttSottolttNFdctd,ototddidootl NRCFoml&#xc3;)4'tl(17)05000315900100105oFo5Conclusion Inconclusion, thecondition didnotadversely impactthehealthandsafetyofthepublicduetothefactthatAreas40,48and49ofUnit1andArea29ofUnit2andprovidedwithsuppression anddetection tosubstantially mitigatetheimpactonnormalandLSZinstrumentation.
Also,alargeportionofthestation's normalinstrumentation wouldremainfunctional sincefirespropagate atafiniteratherthancausinganinstantaneous lossoffunctionforanentirearea.Corrective ActionsUnitOneAplantTemporary Modification wasinitiated whichinstalled a1amperefusein1-LSI-6ontheloadsideofthe1>>29685Gcable.Thiswayafireinthefireareasofconcernwouldnoteliminate theabilityofproviding Unit2powertotheLSIpanels.~UktTeeAplantMinorModification wasinitiated toprovideaone-hourfireenclosure (wrapped) aroundConduit2-12467thatexistsinFireZone24.Conduit2-12467wasin10CFR50AppendixRcompliance on9/20/90.Subsequent investigation hasrevealedthatwhenmodifications 2900-B.04 (October5,1990)and12-3053(December 19,1990)werecompleted/installed thesub)ectcablenolongerneededtobewrappedbecausezone24couldnowbecategorized asmeetingAppendixRZIZ.G.1criteriaduetotheinstallation ofadditional instrumentation.
Znaddition, thereissuppression anddetection inthearea.~GeeralOurprogramforensuringcontinued 10CFRSOAppendixRcompliance willberevised.Itisanticipated thatthisrevisionwillbeinplacebyMarch1,1991.FailedComonentIdentification NonePreviousSimilarEvents050"315/90-0083 10CFR50AppendixRdeficiencies resulting inpotential lossofauto-start ofservicewaterpumpsduetoincorrect implementation ofdesignchange.NRCFonll35SA(589)}}

Revision as of 08:18, 29 June 2018

LER 90-010-01:on 900824,discovered That Routing Cable Associated W/Unit 1 Low Shutdown Indication Panels Not in Compliance w/10CFR50,App R.Minor Plant Mod Initiated to Provide Encl (Wrapped) Around Subj conduit.W/930813 Ltr
ML17331A943
Person / Time
Site: Cook American Electric Power icon.png
Issue date: 08/13/1993
From: BLIND A A, BREWER S J
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-90-010, LER-90-10, NUDOCS 9308200131
Download: ML17331A943 (8)
v • d • e


Text

ACCELERATED DOCUMENTDISTRIBUTION SYSTEMREGULAT+INFORMATION DISTRIBUTIO!YSTEM (RIDE)ACCESSION NBR:9308200131 DOC.DATE:

93/08/13NOTARIZED:

NODOCKET¹FACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,IndianaM05000315AUTH.NAMEAUTHORAFFILIATION BREWER,S.J.

IndianaMichiganPowerCo.BLINDFA.A.

IndianaMichiganPowerCo.RECIP.NAME RECIPIENT AFFILIATION

SUBJECT:

LER93-010-01:on 900824,routing ofcableforUnits162notincompliance w/10CFR50,App R.Initiat plantmodifications forcablecompliance.Rev correctserrorinidentified controlroominstrumentation duringfire.W/930813 ltr.DISTRIBUTION CODE:IE22TCOPIESRECEIVED:LTR ENCLSIZE:TITLE:50.73/50.9 LicenseeEventReport(LER),IncidentRpt,etc.NOTES:RECIPIENT IDCODE/NAME PD3-1LADEAN,WINTERNAL:

ACNWAEOD/DSP/TPAB NRR/DE/EELB NRR/DORS/OEAB NRR/DRCH/HICB NRR/DRIL/RPEB R~QSSPLBGFIL02RGN3FILE01COPIESLTTRENCL1111221111111111111111RECIPIENT IDCODE/NAME PD3-1PDAEOD/DOAAEOD/ROAB/DSP NRR/DE/EMEB NRR/DRCH/HHFB NRR/DRCH/HOLB NRR/DRSS/PRPB NRR/DSSA/SRXB RES/DSIR/EIB COPIESLTTRENCL111122111111221111EXTERNALEGGGBRYCEFJ~HNRCPDRNSICPOOREFW~221111LSTLOBBYWARDNSICMURPHY,G.A NUDOCSFULLTXT111111NOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE!CONTACI'HE DOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)

TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!FULLTEXTCONVERSION REQUIREDTOTALNUMBEROFCOPIESREQUIRED:

LTTR30ENCL30 I'X IndianaMichiganPowerCompanyCookNuclearPlant~OneCookPlaceBridgman, Ml491066164655901lNDIAMANlCHletAN POWERAugust13,1993UnitedStatesNuclearRegulatory Commission DocumentControlDeskRockville, Maryland20852Operating LicensesDPR-58DocketNo.50-315DocumentControlManager:Inaccordance withthecriteriaestablished by10CFR50.73entitledLicenseeEventReortSstemthefollowing reportisbeingsubmitted:

90-010-01 Sincerely, A.A.BlindPlantManager/sbAttachment c:J.B.Martin,RegionIIIE.E.Fitzpatrick P.A.BarrettR.F.KroegerW.E.Walters-Ft.WayneNRCResidentInspector B.A.Wetzel-NRCM.R.PadgettG.Charnoff, Esp.D.HahnINPOS.J.BrewerB.A.Svensson;-OAi3~f'.9308200i3i 9308i3PDRADOCK050003i58PDR NRCFORM366(569)VS.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORTILER)APPROVEDOMBNO.3)504)104 EXPIRES:4I30I92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REGUESTt50.0HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(Pc)30).U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, DC20555.ANDTOTHEPAPERWORK REDUCTION PROJECT131500104),

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, DC20503.FACILITYNAMElllD.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)PAE3)o5ooo31510(-05"10CFR50AppendixRDeficiencies Resulting inPotential LossofLocalShutdownIndication PanelFunctionEVENTDATE(SILERNUMBERIS)REPORTDATE(7)OTHERFACILITIES INVOLVED(SlMONTHDAYYEARYEARSEQUENTIAL r..epiNUMBERN'c>NUMSERMONTHOAYYEARFACILITYNAMESD.C.Cook-Unit2DOCKETNUMBERISI 0500031608249090010008139305000OPERATING MODEIS)jth'sxcNCi...Cv':

POWERLEVEL'1ppy'v'0.402()t) 20A05(el(1 (0)20AOSleHI)(Q)20,405(sl(1) liiil20.405(4)(I)(lr)20.405(el(1)(r)20.405(c)

BOM(e)II!50M(e)(2)50.73(el(2) ll)50.73(sl(2)

Iiil50.73ls)(2)liiilLICENSEECONTACTFORTHISLER(12I50.73(ell2)lie)50,'73(s)

(2)(r)50.73(s)(2)lr)I)50.73(~)(2)(xiii)

IA)50.73(eI(2)ls)ill(5)50.73(~Il2)Ix)THISREPORTISSUBMITTED PURSUANT70THERLDUIREMENTB of10cFR(i:IcsrcconrotmtNroitnrfottowinpl Ill73.71(o)73.71(clOTHERISpectiyinApttrectOrlowendinText,Hi)CForm36SAJNAMES.J.Brewer-NuclearSafety,Licensing andAssessment, ManagerTELEPHONE NUMBERAREACODE614223-202COMPLETEONELINEFOREACHCOMPONENT FAILUREDESCRIBED INTHISREPORTl13)CAUSESYSTFMCOMPONENT MANUFAC.TVREREPORTABLE TONPRDSCAUSESYSTEMCOMPONENT MANUFAC.TVREREPORTABLTONPRDS5~8%SKI&SVPPLEMENTAL REPORTEXPECTED(14)YESIifyet,compirteEXPECTEDSVS4IISSIOH DATfiNOABSTRACTILlmitto14IX)tprcrt,i.r.,rppmximetriy fifteensinplrg>>crtyprwn'ttrn imrslIIS)EXPECTEDSUBMISSION DATEIISIMONTHDAYYEARThepurposeoftherevisionistocorrectanerrorintheidentified controlroominstrumentation available duringafireinUnit2firearea29.Therevisionalsoisinresponsetoacommitment inLER50-316f93-005dated-5/20/93.Thecommitment inLER50-316893-005wastorevisethisLERuponre-evaluation oftheAppendixRcompliance strategyforthesub)ectfireareas.OnAugust24,1990,withUnit1operating at100percentpowerandUnit2inModeSix,itwasdiscovered thattheroutingofcableassociated withtheUnit1LocalShutdownIndication (LSI)panelswasnotincompliance with10CFR50AppendixR.OnSeptember 6,1990,i.twassubsequently di.scovered thatasimi.larcondition existedfortheUnit2LSIpanels.Theimmediate corrective actiontakenwasinitiation ofplantmodi.fications tobringthesubjectplantcablingintocompliance with10CFR50AppendixR.Allidentified areasareprovidedwithadequatefiredetection andsuppression tosubstantially mitigatetheimpactofafireonnormalandLSIinstrumentation.

Therefore, thiseventdidnotadverslyimpactthehealthandsafetyofthepublic.NRCFottn365(569)

NRCFORM344A(4$9)U.S.NUCLEARAEGULATOAY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPAOVEDOMBNO.S(500(05 EXPIRES:el30N2ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REOUESTI500HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCHIP430).U.S.NUCLEARREGULATORY COMMISSION.

WASHINGTON, DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(3(5041041.

OFFICEOFMANAGEMENT ANDBUDGET,WASHINGTON, OC20503.FACILITYNAME(1)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)YEARLERNUMBER(4155GVCNTIAL r(2NVMIIEVISION NVM5OPAGE(3)TEXTlllmoreepecelrrer)o(red.

Ireeeddldorml llRC%%drm35EABI(12)o5ooo315900100102OF05CoditionsPriortoOccurrence Unit1inMode1at100percentRatedThermalPowerUnit2inMode6.DescritionofEventOnAugust24,1990,itwasdiscovered thattheroutingofcablesassociated withtheUnit1LocalShutdownIndication (LSI)panelswasnotincompliance with10CFR50AppendixRrequirements.

Apostulated fireinanyofthreeUnit1fireareascouldhaveresultedinaninability tomaintainpowertotheLSIpanels.The.following describes theanalysisperformed.

Unit1FireAreas40(Zone41),48(Zone55),and49(Zone56).Theareaanalysesperformed identified thatafireinanyoneofthesefireareascouldhaveeliminated boththeUnit1andUnit2powertotheLocalShutdownIndication (LSI)panels.Thediscrepant cableinquestionwascable1-29685G(EIIS/ED-CBL3) whichrunsbetweenpanels1-LSI-6and1-LSI-6X.

Afaultofthiscableduetoafirewouldhaveeliminated theUnit2Alternate feed-totheUnit1LSIpanels.TheUnit1normalpowerfeedtotheLSIpanelswasalreadyassumedlostforafireinanyoftheseareasbecausevariouscablesassociated withtheavailability ofMCC1-ABC-Bwouldhavebeenlost.OnSeptember 6,1990,itwassubsequently discovered thatasimilarcondition existedfortheUnit2LSIpanels.Apostulated fireinoneoftheUnit2fireareascouldhaveresultedinaninability tomaintainpowertotheLSIpanels.Thefollowing describes theanalysisperformed.

Unit2FireArea29(Zones24,25)Theareaanalysesperformed identified-thatafireinFireZone24wouldhavefaultedboththeUnit1andUnit2powertotheLSIpanels.Thediscrepant powersourcetotheUnit2LSIpanelsrunsinFireZone24whichalsocontainstheUnit2normalsourcecable2-12467(EIIS/ED-CBL3).

Although2-12467alsorunsinZone25,1-1936Rdoesnot.FireZones24and25areseparated byathree-hour fire-rated wall.NRCForm344A(509)

NRCFORM35SA)509)ILS.NUCLEARREQULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPROVED0MBNO.31504)0>>

EXPIRES:>>/30/92ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST.'00 HRS.FORWARDCOMMENTSREGARDING BURDENESTIMATETOTHERECORDSANDREPORTSMANAQEMENT BRANCH(P430),U.S.NUCLEARREQULATORY COMMISSION, WASHINQTON, DC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(3150410i).

OFFICEOFMANAQEMENTANDBUDGET,WASHINQTON,DC20503.FACILITYNAME11)D.C.CookNuclearPlant-Unit1DOCKETNUMBER12)o5ooo315LERNUMBER15)YEAR<~SEQUENTIAL

)~AEVI>>ION>0?3NUM>>II.sW:NUMB>>A90-010-01~AOEC))03oF05TEXT///mor>><<ec>>4r>>r/unrLu>>>>>>~Ar/ICformSr/SAS/(illCauseofEventThecondition wastheresultofinsufficient scopingfor10CFR50AppendixRdesignchanges.Insufficient controlswereinplacetoensurethatnewcablesaddedtotheplantcompliedwith10CFR50AppendixRrequirements.

nalsisofEventThiseventisbeingreportedinaccordance with10CFR50.73 (a)(2)(ii)(B) and10CFR50.73 (a)(2)(ii)(C) inthatthecondition wasoutsidethedesignbasisandnotcoveredbytheplant's.operating andemergency procedures respectively.

Unit1FireAreas40,48and49AnalysisFireArea402OurSafeShutdownSystemAnalysis(SSSA)showsthatforafireinArea40controlroomindications equivalent tothosefoundontheLSIcabinetwouldbelost.Duetocablemisrouting, theLSIpanelindications wouldalsohavebeenlost.Furtherinvestigation revealedthereasonthatthecontrolroomindication wouldhavebeenlostisbecauseoneofthealternate sourcestotheCRIDpanels,theisolimeters, islocatedinthisarea.WhattheSSSAdoesnotshowisthatthepreferred sourcetotheGRIDpanelswouldhavebeenavailable.

Theinverters arelocatedinFireArea41(FireZone42C).Therefore, normalcontrolroomindication ofprocessmonitoring wouldhavebeenavailable forfireinArea40.b.FireAreas48and492Underconservative assumptions oflossoffunctionforanareafire,theSSSAshowsthatforafireinAreas48and49boththecontrolroomandtheLSIpanelindications wouldhavebeenlost.However,FireAreas48and49areprovidedwithadequatesuppression anddetection tosubstantially mitigatetheimpactonnormalandLSIinstrumentation.

NRCForm356A15$9)

NRCFORM388A(889)U.S.NUCLEARREGULATORY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPROVEDOMBNO.3)504)08EXPIRES:O)30NQESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:50J)HRS.FORWARDCOMMENTSREQARDINQ BURDENESTIMATETOTHERECORDSANDREPORTSMANAGEMENT BRANCH(P430).U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, OC20555,ANDTOTHEPAPERWORK REDUCTION PROJECT(31504104),

OFFICEOFMANAGEMENT ANOBUDGET,WASHINGTON, DC20503.FACILITYNAME(1)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)LERNUMBER(8)YEARI))OISSQUSNTIALg~ASVISIQN PAIIUMSII'ANUMSII~AQEI3)TEXTlitmonJOoco*roOIdmd.

usooddldoool HRCFomI388AQJ(17)ooooo31590010-01040"05AnalsisofEventUnit2FireArea29(Zones24and25)Analysis:

AlthoughpowertotheLSIpanelswouldbelostforafireinzone24,necessary controlroomindication wouldstillhavebeenavailable withtheexception ofRCStemperature (RCScoldlegtemperature couldhavebeenderivedindirectly fromtheavailable steamgenerator pressureinstrumentation.

According toourSafeShutdownSystemsAnalysis, afireinFireArea29(Zones24and25)wouldnothaveeliminated processmonitoring indication inthecontrolroomforsteamgenerators 1and4.Thefollowing indication wouldhavebeenavailable intheUnit2controlroom:2-BLP-112 2-BLP-142 2-MPP-210 2-MPP-240 2-M312-NLP-151 or2-NLP-153 2-NPS-121 SG1WaterLevel(normalrange)SG4WaterLevel(normalrange)SG1PressureSG4PressureSourceRangeMonitoring Channel1Pressurizer WaterLevelRCSPressure(widerange)**Subsequent investigation indicates that2-NPS-121 wouldnothavebeenavailable sincethecablefor2-NPS-121 wasunprotected andisalsoroutedthroughzone24.Lossof2-NPS-121 duringapotential fireinzone24couldhavebeencompensated forthroughtheuseofacontingency procedure withintheemergency operating procedures.

Thisprocedure providedfortheuseoftestinstruments connected totheRVLIScabinetinthecontrolroomtoreadRCSpressure.

Controlroomoperators weretrainedontheuseofthisprocedure.

Theseindications couldprovideanindirectmeansofdetermining RCStemperature.

Thisareaisprovidedwithadequatedetection andsuppression tosubstantially mitigatetheimpactonnormalandLSIinstrumentation.

NR0FomI388A(589)

NRCFORM355A(549)U.S.NUCLEARAEGULATOAY COMMISSION LICENSEEEVENTREPORT(LER)TEXTCONTINUATION APPAOVEO0MBNO.31504'105 EXPIRES(tl30/92 ESTIMATED BURDENPERRESPONSETOCOMPLYWTHTHISINFORMATION COLLECTION REQUEST:508)HRS.FORWARDCOMMENTSREGARDING BUADENESTIMATETOTHERECOAOSANDREPORTSMANAGEMENT BRANCH(P4301,U.S.NUCLEARREGULATORY COMMISSION, WASHINGTON, OC20555,ANDTOTHEPAPERWORK AEDUCTION PROJECT(31504)04),

OFFICEOFMANAGEMENT ANOBUDGET.WASHINGTON, DC20503.FACILITYNAME(I)D.C.CookNuclearPlant-Unit1DOCKETNUMBER(2)YEARLERNUMBER(5)ttQVtNTIAL NVMtRRtVI510NNVMtRPAGEIS)TEXTllfmcttSottolttNFdctd,ototddidootl NRCFomlÃ)4'tl(17)05000315900100105oFo5Conclusion Inconclusion, thecondition didnotadversely impactthehealthandsafetyofthepublicduetothefactthatAreas40,48and49ofUnit1andArea29ofUnit2andprovidedwithsuppression anddetection tosubstantially mitigatetheimpactonnormalandLSZinstrumentation.

Also,alargeportionofthestation's normalinstrumentation wouldremainfunctional sincefirespropagate atafiniteratherthancausinganinstantaneous lossoffunctionforanentirearea.Corrective ActionsUnitOneAplantTemporary Modification wasinitiated whichinstalled a1amperefusein1-LSI-6ontheloadsideofthe1>>29685Gcable.Thiswayafireinthefireareasofconcernwouldnoteliminate theabilityofproviding Unit2powertotheLSIpanels.~UktTeeAplantMinorModification wasinitiated toprovideaone-hourfireenclosure (wrapped) aroundConduit2-12467thatexistsinFireZone24.Conduit2-12467wasin10CFR50AppendixRcompliance on9/20/90.Subsequent investigation hasrevealedthatwhenmodifications 2900-B.04 (October5,1990)and12-3053(December 19,1990)werecompleted/installed thesub)ectcablenolongerneededtobewrappedbecausezone24couldnowbecategorized asmeetingAppendixRZIZ.G.1criteriaduetotheinstallation ofadditional instrumentation.

Znaddition, thereissuppression anddetection inthearea.~GeeralOurprogramforensuringcontinued 10CFRSOAppendixRcompliance willberevised.Itisanticipated thatthisrevisionwillbeinplacebyMarch1,1991.FailedComonentIdentification NonePreviousSimilarEvents050"315/90-0083 10CFR50AppendixRdeficiencies resulting inpotential lossofauto-start ofservicewaterpumpsduetoincorrect implementation ofdesignchange.NRCFonll35SA(589)

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