ML17331A943

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
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)

Text

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

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)

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)

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)

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)

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,ototddidootlNRCFomlÃ)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)