ML18038A078

Control Sys Common Sensor Line Failure Analysis Evaluation Rept for Nine Mile Point Nuclear Station Unit 2.

ML18038A078
Person / Time
Site:	Nine Mile Point
Issue date:	07/31/1985
From:	BENNETT D E GENERAL ELECTRIC CO.
To:
Shared Package
ML18038A077	List: ML18038A076 ML18038A078 ML18038A079
References
CON-IIT07-450-91, CON-IIT7-450-91 NUREG-1455, NUDOCS 8511070124
Download: ML18038A078 (142)

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CONTROLSYSTEMSCOMMONSENSORLINEFAIIUREANALYSISEVALUATIONREPORTFORNINEMILEPOINTNUCLEARSTATIONUNIT2JULY1985PREPAREDFORNIAGARAMOHAWKPOWERCOMPANY852i070i2485ii04PDRADQCK050004i0EPDR

CONTROLSYSTEMSCOMMONSENSORLINEFAIIUREANALYSISEVALUATIONREPORTFORNINEMILEPOINTNUCLEARSTATIONUNIT2JULY1985PREPAREDFORNIAGARAMOHAWKPOWERCOMPANYPREPAREDBYD.E.BENNETTGENERALELECTRlCCOMPANYNUCLEARENERGYBUSINESSOPERATIONSSANJOSE,CALIFORNIA95125APPROVEDBY:el~~/s-)A.Koslov,TechnicalLeader-RegulatoryComplianceEngineeringNuclearServicesProductsDepartmentM.A.Smith,Manager-RegulatoryComplianceEngineeringNuclearServicesProductsDepartmentE+Fg/Md~E.C.Echert,Manager-PlantOperationalPerformanceEngineeringPlantPerformanceEngineeringCC..YinSafety'nProjectLicensingEngineeringXicensingOperation12-25341

CONTROLSYSTEMSCOMMONSENSORLINEFAIIUREANALYSISEVALUATIONREPORTFORNINEMILEPOINTNUCLEARSTATIONUNIT2Theinformationcontainedherein,supplementedbytheexistingFSARChapter15transientanalyses,documentsanevaluationoftheNineMilePointNuclearStationUnit2controlsystemsinteractionduetoacommonsensorlinefailure.l.0PURPOSEThegeneralpurposeoftheCommonSensorLineFailureAnalysiswastoreviewthefailureeventsofnon-safetygradeNineMilePointNuclearStationUnit2(NMP2)controlsystemswhichutilizecommonsensorlinesorsensorsignals.Thespecificpurposeoftheanalysisandthisreport.wastosupplementtheexistingNMP2FSARChapter15AccidentAnalysesandrespondtotheNRC'sNMP2FSARQuestion421.42concernspertainingtothefailureof,acommonsensorlineandsensors.

2.0CONCLUSION

Theconclusionofthisevaluationisthatthelimitsofminimumcriticalpowerratio(MCPR),peakvesselandmainsteamlinepressures,andpeakfuelcladdingtemperaturefortheexpectedoperationaloccurrencecategoryoftheidentifiedeventswouldnotbeexceededasaresultofacommonsensorlinefailure.Althoughtransientcategoryeventshavebeenpostulatedasaresultofthisstudy,theneteffectshavebeendeterminedtobelessseverethanandboundedbytheeventsinChapter15.3.0ANAIYSISMETHODOLOGYInconjuctionwiththeNMP-2ControlSystemsCommonPowerSourceFailureAnalysis(CPA)portionoftheoverallNMP2ControlSystemsFailureAnalysisProgram,acomprehensiveapproachwasdevelopedandimplementedtoaddressthegeneralpurposeoftheanalysesaswellasthespecificNRCNMP2FSARQuestion421.42concerns.Theactivitylist,Table1.1,andfollowingdescriptionshighlightthemethodologyusedtoperformtheanalysis.Itshouldbenotedthatthisstudyusedtheevent-consequencelogicoftheNMP2FSARChapter15analysis,butitstartedthelogicchainfromaspecificsource(e.g.,asinglecommonsensorlinefailure)ratherthanasystemcondition(e.g.,feedwaterrunout).Byapproachingthestudyinthismanner,agreatdealofconfidencecanbeplacedinthestudyconclusions.Thesoundnessofthetotalplantdesignisdemonstratedbyitsbeingtolerantoftheseeffects.12-25342

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3.1SystemIdentificationThescopeofcontrolsystemstobeanalyzedwasestablishedbyfirstcompilingacompletelistoftheNineSilePointNuclearStationUnit2systemsandsubsystems.Next,thelistwasreviewedtoconfinetheanalysistoonlythosesystemswhich,intheirnormal(automatic,ifavailable)controlmode,havethepotentialtoaffectreactorpressurevessel(RPV)pressure,waterlevel,orpowerlevelchanges.3.1.1AlltheHMP2plantinstrumentationandcontrolsystemswereidentified,listed,andagreeduponascompletebythetwoprincipalanalyzingengineergroups,i.e.,GeneralElectricCompany(GE)andStoneandWebsterEngineeringCorporation(SWEC)..3.1.2Systemandcomponenteliminationcriteria(seeTable1.4)were'derivedandagreeduponbytheprincipalstodeletenon-electrical,non-opera-tional,ornon-controlsystemsorcomponents(includingsomepreviouslyanalyzedsystemsandcomponentsalreadyaddressedinFSARChapter15)fromthesystemsidentifiedin3.1.1above(seeTables1.2and1.3).Iftherewas.anyuncertaintyastowhetherornotasystemmet,thecriteria,itwasretainedforfurtheranalysis.Thosesystemsthatmetthecriteriaforeliminationweresonotedinthecompletesystemlist,leavingtheremainingcontrolsystemstobeanalyzed.3.2CommmonSensorLineorSensorIdentificationTheCommonSensorFailuxeAnalysisportionoftheControlSystemsFailureAnalysesthenidentifiedstrategicreactorprocesssensorlinesorsensorscommonlysharedbytwoormoreplantsystems,atleastonesystemofwhichwasanon-safetygradesystemidentifiedinSection3.1.2above.3.3Failure@peDeterminationBasedonconservativeassumptions,acompleteandinstantaneoussensorlinebreakorplugduringnormal,fullpowerreactoroperationwasdetexminedtobetheboundingfailuretypesforeachsensorlineanalyzed.3.4DefinitionsECommonInstrumentLine:Alineprovidingaprocesspressuresignaltotwoormoreinstrumentsensors(pressuretoelectricalcurrentinstru-ment,P/I,transmitters)whichservetwoormoreinstrumentsystems,ofwhichatleastonesystemisanon-safetygradecontrolsystem,e.g.,FeedwaterControlSystem(C33).CommonInstrumentSensor:Aninstrumentsensorwhichprovidesinputstotwoormoreinstrumentsystems,ofwhichatleastonesystemisanon-safetygradesystem.12"25343

LineFailureTypes:Broken:Aninstantaneousinstrumentlinebreak(guillotinebreak)thatventstoanambientpressure(nearatmosphericpressure)environment.Plugged:Aninstantaneousinstrumentlineplug(completeblockage,pinch)maintainingas-failedlinepressureattheinstrumentsensorandessentiallyinhibitinganymonitoringchange,especiallyactualprocess,vessel,orlineparameterchanges.Note:Inthecaseofdifferentialpressuresensinginstrumentsmonitoringreactorpressurevesselwaterlevel,apluggedreferenceorvariablelinecouldresultin,amorecomplexresponse.Theconservativeresponse,however,isstillaninhibitedresponse,i.e.,noactionswouldoccur.PrimaryEffects:Thedirect,instantaneouseffects,ifany,onthespecificallyidentifiedsensororcomponentresultingfromthefailure.Usually,thesensedinputsignaltothesensorcomponentgoestoaminimumormaximumvalueor,inthecaseofasensorlineplug,remainsrelativelyconstantataninaccurate(as-failed)value,insensitivetoanyactualprocesschanges.SecondaryEffects:Theindirecteffect,instantaneousordelayed,ifany,onthespecificallyidentifiedsensororprominentsubsequentinstrumentloopcomponents,i.e.,indicators,tripunits(trips,permis-sives,initiators),controls{controllers,valves),ordevices(relaysorlights).RPVLiquidLevelPressureorPowerLevelEffects:Anyactualorpro-bablereactorpressurevesselliquidlevel,pressureorpowerlevelchangedirectlyorindirectlyattributabletotheidentifiedfailureandcomponentactionsorinactions.ICombinedEffects:Thesystematicevaluationoftheidentifiedlinesandsensorsprimaryandsecondaryeffectsandtheresultingaction(s),ifany,whichwouldmostlikelyresultasadirectaccumulationofeach,orall,sensorfailuresandRPVpressure,liquid,andpowerlevelchangeeffectsonplantperformance.3.5Line-GroupandComponentTabulationandFailureAnalysisThesensorinstrumentationdirectlyconnectedtoandreceivinganinputsignalfromtheidentifiedsensinglineorsensorwereindividuallyidentified,grouped,listed,andanalyzedtodeterminewhat,ifany,actionwouldresultfromtheoccurrenceofeachline/sensorfailuretypedescribedinSection3.3.Theprimary,secondary,andRPVparameterchangeeffects,ifany,werethenidentified,analyzed,andtabulated.Note:Becausesignalsfromthesecommonlinesandsensorswerefre-quentlyutilizedbycomponentspreviouslydeletedaspartof.step3.1.2above,forcompleteness,theseandquestionable,non-safetyorcontrolcomponentswereretainedintheanalysisgroups.12"25344

3.6CombinedFailureEffectAnalysisThecomponentsandtheirfailureeffectsidentifiedinSection3.5wereevaluatedandreviewedforcumulativeeffectsbytheprincipalpartiestoidentifytheprimecomponentandcombinedcomponentfailureeventscenarioslistedanddiscussedintheCommonSensorIineFailureAnaly-sisandEvaluationSuassary,Table1.5,andmorecomprehensivelyinthe'ommonSensorLineFailureAnalysisloadsheets,AppendixA.3.7ComparisonofAnalysisResulttoFSARChapter15Theconsequencesofthepostulatedfailuresandtheirassociatedprocessdisturbances.werecomparedtotheconsequenceofthe.eventsanalysesdescribedinNMP2FSARChapter15.WheretheChapter15eventdescrip-tioncontainedconsequencesofthepostulatedfailure,theChapter15eventwasconsideredtoboundthepostulatedfailures.4.0ADDITIONALSINGLEFAIIUREINANACCIDENTMITIGATINGSAFETYSYSTEM4.1SubsequenttocompletingtheCommonSensorFailureAnalysisevaluations,eachpostulatedfailurewasreviewedtoconservativelyselectaspecificsensorlinefailurewhich,incombinationwithanadditionalsinglecomponentfailureinareactoraccidentmitigatingsafetysystem,wouldresultina"worstcase"failureeventnotpreviouslyidentified.BecauseanRPVLine3break,unlikeaLine2or4break(seeTable1.5),wouldnotnormallyleadtoarelativelypromptreactorscram,butlikeLines2and'interfaceswithmultiplestrategicinstrumentsandsystems,thislineincombinationwiththeadditionalsinglecomponentfailuredescribedbelowwaspostulatedasthe"worstcase"identifiedfailure.ConcurrentwiththeLine3failureeventdescribedinTable1.5,theRPVlevelsensorB22-N080Bisassumedtofailupscale,inhibitingaDivi-sion2,RPSChannelBlowRPVwaterlevel3reactorscram(seeAppen-dixA).ThisRPSChannelBinhibit,togetherwithapostulatedsingleupscalefailureoftheRPVlevelsensorB22-N080D(onLine5),whichinhibitsaDivision4,RPSChannelDlowRPVwaterlevel3reactorscram,wouldprecludetheinitiationofalowRPVwaterlevel3reactorscramfromoccurringasindicatedinTable1.5.4.1.2WhiletheactualRPVwaterleveldecreasewouldcontinue,activatinglowRPVwaterlevel4and3alarms,thenormallyexpectedlowwaterlevel4reactorrecirculationpumpsandflowrunback,beingafunctionoftheselectedfailedLine3feedwatercontrolRPVlevelsensorC33-N004Bhighlevelsignal,wouldnotoccur.Undertheseconditions,theNMP2plantemergencyprocedureswouldspecificallydirectanoperatortoinsertthereactorcontrolrodsviamanuallyinitiatingacompleteRPStrip.ContinuedoperatorinactionwouldleadtoautomaticprotectionwhenthewaterlevelreacheslowRPVlevel2.Atthislevel,theAlternateRodInsertion(ARI)featurewillbeinitiatedprovidingfullcontrolrodinsertionandreactorshutdown.12-25345 4

4.2Theadditionalsinglefailureanalysisresultswereevaluatedandcompared.withtheFSARChapter15analyses.Nosinglecompletelyboundingfailurewasidentified.Thepostulateddoublefailure,i.e.,lin>>failureanddevicefailureoccurrence,similartootherselectedhighlyunlikelydoublefailureoccurrences,wasnotspecificallyaddressedinChapter15.4.3WhiletheNMP2FSARChapter15didnotdirectlyaddresstheabovedescribedpostulatedfailureevent,theresponsestoNRC'spreviousNHP2FSARQuestion42]2'IandtheRP2SafetyEvaluation(SER)Section7.2.2.7dosatisfactorilyaddresssimilarevents.12-25346 P

TABLEI.lCONTRO~.SYSTEMSCOMMONSENSORLINEFAILUREANALYSISACTIVITIESANDASSIGNMENTSNO.ACTIVITYDESCRIPTIONI.SystemIdentification2.CommonSensorLineorSensorIdentification3.FailureTypeDetermination4.Line-GroupandComponentTabula-tionandFailureAnalysis5.CombinedFailureEffectAnalysis6.ComparisonofAnalysisResultstoFSARChapter15,andExceptions7.AdditionalSiugleFailureinanAccidentMitigatingSafetySystem8.MajorEventResolutionandChapter15Modification(ifrequired)9.DraftandFinalReportCompilingSECTION3.13.23.33.53.63.73.84.02.0ASSIGNMENTGEandSWECGEandSPECGEandSPECGE.GE12-2493(1)

J TABLE1.2CONTROLSYSTEMSFAIIUREANALYSESIDENTIFICATIONANDELIMINATIONOFSYSTEMSFORTHECOMMONPOWERSOURCEANDCOMMONSENSORORSENSORLINEFAIIUREANALYSESNUCLEARSTEAMSUPPLY(NSS)SYSTEMSSCOPESYSTEMIDB13B22B22AB22BB22CB22HB35C12AC12BC22C33C41C51C51AC51BC51CC51DC72C88C91D13D24E12SYSTEMDESCRIPTIONReactorNuclearBoilerProcessInstrumentationJetPumpInstrumentationAutoDepressurizationNuclearSteamSupplyShutoffReactorRecirculationReactorManualControlControlRodDriveHydraulicReduadantReactivityContzolFeedwaterControlStandbyLiquidContxolNeutronMonitoringStartupRangeMonitoringPowerRangeMonitoringStartupRangeDetectorDriveTzaversingIncoreProbe(TIP)CalibrationReactorProtectioaRPSMGSetControl,.EngineeringTestandInformationPerformanceMonitoringProcessRadiationMoaitoringSteamLineRadiatioaMonitoringPostAccidentSamplingResidualHeatRemovalELIMINATIONCODE+Nl,N2N3,N4N2N6N6NoneNoneNoneN6NoneN6N3NoneN3N4N6N6N2,N5N2,N5NoneN6N2>N5+SeeTable1.4forcodecriterionexplanation.12-2045(1)

J0 SYSTEMIDSYSTEMDESCRIPTIONELIMINATIONCODE+E21E22E31FllF12F13F14F15F16F17F24F41G33G36H13L12LowPressureCoreSprayHighPressureCoreSprayLeakDetectionSteamTeakDetectionReactorCoreIsolationCoolingReactorFuelServiceEquipmentServicingAidsReactorVesselServiceEquipmentIn-VesselServiceEquipmentRefuelingEquipmentStorageEquipmentUnder-VesselServiceEquipmentGE/NEDEquipment(VesselComponents/TestEquipment)StartupEquipmentReactorWaterCleanupFilter/Demineralizer(RWCU)ControlRoomPanels(Portions)LocalInstrumentPanels(Portions)Fuel(Reactor)CoreManagementServicesFuelDesignServicesN6N6N6N6N6N3N2N2N2N3N2N3N3N3N5N5AllrelevantcomponentsareincludedinotheridentifiedsystemsNlNlNl*SeeTable1.4forcodecriterionexplanation.12-2045(2)T3 II TABLE1.3CONTROLSYSTEMSFAILUREANALYSESIDENTIFICATIONANDEIIMINATIONOFSYSTEMSFORTHECOMMONPOWERSOURCEANDCOMMONSENSORORSENSORLINEFAILUREANALYSESBALANCEOFPLANT(BOP)SYSTEMSSCOPESYSTEMIDAAS12-9ABD10-6ABF10"2ABH13-11ABM10"1ARC5-1ASR3"10ASS3-9CCP9-1CCS9<<7CESSYSTEMDESCRIPTIONBreathingAirAuxiliaryBoilerBlowdownAuxiliaryBoilerFeedwaterandCondensateAuxiliaryBoilerChemicalFeedAuxiliaryBoilerSteamAnnunciatorInputCondenserAirRemovalAuxiliarySteam-RadwasteAuxliarySteam-NuclearBatterySystemReactorPlantComponentCoolingWaterTurbinePlantComponentCoolingWaterElectricalEquipment-ControlRoomElectricalEquipment-LocalELIMINATIONCODE+N4N3,N4N3,N4N3,N4N3)N4N2NoneN3,N4NoneNoneNone*SeeTable1.4Forcodecriterionexplanation.12-2190(1)T4 1

SYSTEMIDCMS33"2CNA4-4.1CND4-7CNM4-1.3CNO4-10CNS4-3CPS22-23CRS3"2CWS2-1DCS28"1DER32-9DET32-11DFD23"11DFE23-8DFM23-12DFR23-6SYSTEMDESCRIPTIONContainmentAtmosphereMonitoringAuxiliaryCondensateCondensateDemineralizerCondensateCondensateBoosterPumptubeOilSystemCondensateMakeup/DrawoffPrimaryContainmentPurgeColdReheatCirculatingVaterDecontaminationSystemReactorBuildingEquipmentDrainsTurbineBuildingEquipmentDrainsStandbyDieselGeneratorBuildingFloorDrainsServiceBuildingEquipmentDrainsMiscellaneousBuildingFloorDrainsReactorBuildingFloorDrainsELIMINATIONCODE+N2N5N5NoneN5N5N3NoneNoneN3NSN5N5N5N5*SeeTable1.4forcodecriterionexplanation.12-2190(2)T5 tPk SYSTEMIDDPT23"7DFM23-10SYSTEMDESCRIPTIONTurbineBuildingFloorDrainsRadwasteBuildingFloorDrainsELIMINATIONCODE-N4,N5DRS22"22DrywellCoolingDSM32-7MoistureSeparatorVentsandDrainsNoneDSR32-6MoistureSeparatorReheaterVentsandDrainsNoneDTM32"5DWS23-1TurbineBuildingMiscellaneousDrainsDomesticWaterNoneN4EGA12-4StandbyDieselGeneratorAirStartupN4,N6EGF8-9EGP,EGS24-9EJS24-11.2ENS24-9ESS3-4StandbyDieselGeneratorFuelStandbyDieselGeneratorProtectionStandbyStationServiceSubstationStandbyStationServiceSupplyBreakersEarthquakeRecording'ystemExtractionSteamN4,N6N7N7NjN2NoneEXSFOF8-10FPF15"4MainGeneratorExcitationSystemDieselPirePumpFuelOilFireProtection-FoamN5N4+SeeTable1.4forcodecriterionexplanation.12-2190(3)T6

SYSTEMIDSYSTEMDESCRIPTIONELIMINATIONCODE*FPG15"5FPL15-3FireProtection-HaloaFireProtection-CO~FPM15-7FireDetectionFPW15"1FWL7-3FWP6-4FireProtection-WaterFDWPumpAuxiliarytubeOilFDW-PumpSealandLeakoffN4N3,N5N5FWR6-3FDWPumpRecirculationNoneFWS6-1GMC16-8GMH16-7GML16-1OGMO16-6GSN14-1GTS27-15HCS27-13HDH6-6FeedwaterSystemGeneratorStatorCoolingWaterGeneratorHsandCOgGeneratorLeadsCoolingGeaeratorSealOilNitrogenSystemStandbyGasTreatmentHydrogenRecombiaerHighPressureFDWHeaterDrainNoaeNoneNoneNoneN5N4,N6N6N6None*SeeTable1.4forcodecriterionexplanation.12-2190(4)T7

SYSTEMIDHDL4-2SYSTEMDESCRIPTIONLowPr.ssureHNHeaterDrainHotReheatELIMINATIONCODE*NoneNoneHVC22-9HVE22"2HVG22-17HVH22"16HVI22-29HVK22-12ControlBuildingA/CServiceBuildingA/CGlycolHeatingHotWaterHeatingAuxiliaryBoilerRoomVentilationControlBuildingChilledWaterN4N4N4N4HVL22-11HVN22-14HVP22-7HVR22-1HVT22-3HVW22-5HVY22"8IAS12-1IHAAuxiliaryServiceBuildingVentilationVentilationChilledWaterDieselGeneratorBuildingVentilationReactorBuildingVentilationTurbineBuildingVentilationRadwasteBuildingVentilationYardStructureVentilationInstrumentAirAnnunciatorSystemN4N4N4N4N4N4N4NoneN2*SeeTable1.4forcodecriterionexplanation.12"2190{5)TS 4~0

~~SYSTEMIDSYSTEMDESCRIPTIONELIMINATIONCODE"IHCISC27-19LMS33-1IOS16-3LWS31-1ComputerI/OTSC/CR/EOF-ERFContainmentIsolationContainmentLeakageMonitoringTurbineGeneratorOilConditioningandStorageVibrationandLoosePartsMonitoringRadioactiveLiquidwasteN2N6N4N2N5MSS3-1MaterialHandlingSystemMeteorologicalMonitoringSystemMainsteamN3N2NoneMWS9-15MakeupWaterN5NJS24-10NormalStationService-SubstationNNS24-8.424-8.6NPS24"8.2OFG31-4PBS23-3NormalStationService-4kVSupplyNormalStationService-13.8kVSupplyOffgasSanitaryDrainsN7NoneN4RadiationMonitoringSystemRemoteShutdownSystemN6,N2*SeeTable1.4forcodecriterionexplanation.12-2190(6)T9'

SYSTEMIDSAS12-2SBPRSCCSCMSFC34-2SPF24"7.1SPG24-2.1SPM24-3SPR24-5SPS24-4SPU24-1SPX24-6.1SRR23-2SRW23-4SSP21-8SSR21"2SYSTEMDESCRIPTIONServiceAirSteamBypassandPressureRegulatorOff-NormalStatusIndicatorPost-AccidentMonitoringFuelPoolCoolingandPurificationResStaXfmrHi-SideLineProtectionMainGeneratorProtectionMainXfmrProtectionResStaXfmrProtectionNormStaXfmrProtectionUnitProtectionStationAuxPowerXfmrProtectionRoofDrainageStormandWasteWaterPost-AccidentSamplingReactorPlantSamplingELIMINATIONCODE*N5NoneN2N2,N5N4,N6N7N7N7N7N7N7N4N4N2,N5N2,N5*SeeTable1.4forcodecriterionexplanation.12-2190(7)T10

~~I SYSTEMIDSST21-1SSW21"4SVH32-14SVV32-8SYSTEMDESCRIPTIONTurbinePlantSamplingRadwasteBuildingSamplingHNHeaterReliefVentsandDrainsMainSteamReliefValves-VentsandDrainsEIIMINATIONCODE+82,85N2,N5N3,N5N6SWP9"10SWP31-6SWT9"13SXSSYD24-12.3ServiceWaterSealWaterRadwasteTravelingScreenWashandDisposalTransientAnalysisSynchronizing-StandbyStationServiceN4N3,N2N7SYG24-12.1Synchronizing-MainGeneratorSYS24"12.2TMA1-4Synchronizing-NormalStationServiceTurbineTripsN7NoneTMB16-5.2TurbineGeneratorE.H.FluidSystemNoneTME16>>1TMG16-4TurbineGeneratorGlandSealandExhaustTurbineGeneratorTurningGearNoneN3TMITurbineGeneratorSupervisoryInstrumentNoneTML16-2TurbineGeneratortubeOil*SeeTable1.4forcodecriterionexplanation.12-2190(8)

J SYSTEMIDTMR1"7TMS16-9VTP32-18WOS16-12WSS31-3WTA13-20WTH13-4WTS13"1YUC24-7.2YXC24-7.3YXL24-3.2SYSTEMDESCRIPTIONUnitRunbackTurbineGeneratorExhaustEoodSprayTurbinePlantEquipmentVentsWasteOilDisposalRadioactiveSolidWasteChemicalFeed-AcidChemicalFeed-HypochloriteWaterTreating-RawWaterSWYDSupplytoResStationService345kVMotor-OperatorDiscSwitch345kVLineProtectionStationGrounding-InstrumentsandControlsBI,IMINATIONCODE+NoneN3,N5N5N4N5N5N5N5N7N7*SeeTable1.4forcodecriterionexplanation.12-2190(9)T12

~~TABLE1.4CONTROLSYSTEMFAILUREANALYSESSYSTEMANDCOMPONENTELIMINATIONCRITERIACODEELIMINATIONCRITERION+NlNon-electricalsystemsorcomponents,i.e.,solelymechanicalozsoftwaresystemsorcomponents.Examples:'heReactorAssembly,vessels,-.steamturbines.Note:'ny.associatedelectricalcontrolcomponentsmightberelevantandaretobereviewed.Examples:vesselliquidlevel,pressureandtemperaturecontrols,andturbinespeedcontrols.N2Non-controltypeelectricalsystemsorcomponents,i.e.,systemsorcomponentshavingnodirectorindizectcontrollingorcontrolledfunction,includingpermissiveinputand~outputsignals(strictlypassivesystemsandcomponents).Examples:theNuclearBoilerProcessInstrumentationsensors,transmitterlights,metersorrecorders,which'nlyprovidepureinformation,i.e.,measurementindications,andrecords.Note:Suchinformation,althoughpossiblyofinterestorimportancetoacceptablereactoroperationandoperatingpersonnel'smanualcontrolactionsisnotconsideredrelevanttoinitiatingorprohibitinganyautomaticelectricalcontxolactionsforthepurposeofthecontrolsystemfailureanalyses.N3Non-operationaltypeelectricalcontrolsystemsorcomponents,i.e.,systemsorcomponentsnotoperatingorrequiredtobeoperableduringnormalreactorpoweroperations.Examples:theRefuelingInterlockControlSystem,thestartuprangeportionoftheNeutronMonitoringSystem,theturoinegeneratorturninggearcontrols.Operationalelectricalcontrolsystemsorcomponentswhichhavenodirectorindirectinteractionwithnormalreactoroperatingcontrolsystemsorcomponents.Examples:non-safetyrelatedheatingandairconditioningcontxolsystems,lightingcontrols.N5Operationalelectricalcontrolsystemsorcomponentswhichdodirectlyorindirectlyinteractwithreactoroperatingcontrolsystemsorcomponentsbutwhichcaninnowayeffectchangesinthereactorvesselliquid,pressure,orpowerlevels.Examples:theRadwasteControlSystem,sumppumplevelcontrols.Operationalelectzicalcontrolsystemsorcomponents,orportionsofsystemsorcomponents,wh'ichperformdirectplantsafetyfunctions.Examples:theReactorProtectionSystem,themainsteamlineradiationmonitoringportionoftheProcessRadiationMonitoringSystem,orthesteamleakdetectiontempezatureelementsandcontrolsoftheIeakDetectionSystem.*Insomecases,morethanonecriterionmayapply.12-2044T13 r

CODEEIININATIONCRITERIO&Note:hnyrelatedres1ouseofthesesafetysystemsorcomponentstoconditionsoractionsbroughtaboutbynon-safetyrelatedcontrolsystemorcomponent.actions,resultingdirectlyorindirectlyfroma'C'on-safetypowersourceorsensorlinefailure,aretobexdentxfxeandanalyzed.Example:areactorvessellowwaterlevelRPStripandasubsequentreactorscramresultingfromalossoffeedwaterflowwhichwas,inturn,directlyorindirectlycausedbyanon-safetypowersourcefailure,e.g.,afeedwaterpumpmotorpowerfailure.N7Electricalpowersystemsorcomponentsinvolvedindistribution,transformation,orinterruptionofelectricalpower.Example:The125Vdccontrolpowerforacondensatepumpcircuitbreaker.However,controlsforthesesystems/componentsmightneedtobecon-sideredifthelossofsuchcontrolpowercouldleadtothefailureofothersystemsandcomponents.*Insomecases,morethanonecriterionmayapply.12"2D44(2)

TABLE1.5COMMONSENSORLINE:-.'AILUREANALYSISEVALUATIONSUMMARYLINE-NO.FAIIURETYPEEVENTDESCRIPTIOPBOUNDINGFSARSECBrokenPluggedNoneNdneBrokenPlugged(1)I.owreactorpressure,vessel(RPV)steamdomepressureindication(notactual)tripsreactorrecirculationpumpsAandBrunbacktotheIZMGset.Coreflowandreactorpowerdecrease.CorevoidswellincreasesRPVlevel,probablytothehighlevel8turbinetripandsubsequentreactorscram.(2)Ifthehighlevel8tripisnotreached,andifcontrollingfeedwater(FM),thehighRPVlevelindication(notactual)decreasesFVflowandRPVactualleveltoaneventuallowlevel3reactorscram.Inh'bitedresponse.Alternatechannelsprovidedesiredinformationandrequiredactions,ifneeded.15.315.2.315.2.7BrokenPluggedIfcontrollingfeedwater,thehighRPVlevelindication(notactual)decreasesfeedwaterflowandRPVleveltoaneventuallowlevel3reactorscram.Inhibitedresponse.Alternatechannelsprovidedesiredinformationandrequiredactions,ifneeded.15.2.7BrokenPluggedLowreactorsteamdomepressureindication(notactual)tripsrecirculationpumpsAandBrunbacktoIZMGset.Coreflowandreactorpowerdecrease.CorevoidswellincreasesRPVlevel,probablytohighlevel8turbinetripandsubsequentreactorscram.Inhibitedresponse.Alternatechannelsavailable.15.315.2.3BrokenPluggedNoneNoneBrokenPluggedLowRPVlevelindication(notactual)tripsRPSCandDlogicchannelscausingalowlevel3reactorscram.Inhibitedresponse.Alternatechannelsavailable.15.2.7*SeeAppendixA,CommonSensorIineLoadSheetsforcompletedescription.12-2494(1)

LINEFAILURENO.TYPE7BrokenPluggedEVENTDESCRIPTIONLowRPVlevelindicatioa(notactual)tripsRPSAandBlogicchannelscausingalowlevel3reactorscram.Inhibitedresponse.A1.teraatechannelsavailable.BOUNDINGFSARSEC15.2.78BrokenThruPlugged12NoneNone13BrokenPluggedRPVleveldecreasesandstabilizesatloverlevelNone14BrokenPluggedHighsteamlineAflowindication(notactual)closesHSIV,reactorscrams.Inhibitedresponse.Alternatechannelsavailable.15.2.415BrokenPluggedRPVleveldecreasesandstabilizesatlowerlevelNone16BrokenPluggedHighsteamlineBflowindication(notactual)closesMSIV,reactorscrams.Inhibitedresponse.Alternatechannelsavailable.15.2.417BrokenPluggedRPVleveldecreasesandstabilizesatlowerlevelNone18BrokenPluggedHigh"earnlineCflovindication(notactual)closesHSIV,reactorscrams.Inhibitedresponse.Alternatechannelsavailable.15.2.419BrokenPluggedRPVleveldecreasesandstabilizesatloverlevelNone20BrokenPluggedHighsteamlineDflowindication(notactual)closesHSIV,reactorscrams.Inhibitedresponse.Alternatechannelsavailable.15.2.421BrokenPluggedLowfeedwaterflowindication(notactual)runsbackrecirculatioapumpsAaadBtoLZMGset.Coreflovandreactorpowerdecrease.CorevoidswellaadZWflowincrease.RPVleveliacreases,probablytoahighlevel8turbinetripandsubsequentreactorscram.Inhibitedresponse.Alternatechannelsavailable.15.315.2.3+SeeAppendixA,CommonSensorLineI.oadSheetsforcompletedescription.12-2494(2)

LINENO.FAILURETYPEBrokenPluggedEVENTDESCRIPTION+Highfeedwaterflowindication(notactual).Ifcontrollingfeedwater,FVflowandRPVl~veldecreasetoaneventuallowlevel3reactorscramInhibitedresponse.Alternatechannelsavailable.BOUNDINGFSARSEC15.2.723BrokenPluggedLowfeedwaterflowindication(notactual),runsbackrecirculationpumpsAandBtoLE2!Gset.Coreflowandreactorpowerdecrease.CorevoidswellandZVflowincrease.RPVlevelincreases,probablytoahighlevel8turbinetripandsubsequentreactorscram.Inhibitedresponse.Alternatechannelsavailable.15.315.2.324BrokenPluggedHighfeedwaterflowindication(notactual).Ifcontrollingfeedwater,PWflowandRPVleveldecreasetoaneventuallowlevel3reactorscram.Inhibitedresponse.Alternatechannelsavailable.15.2.7BrokenPluggedSlightdecreaseinRPVlevelandpowerNone2762829Thru36BrokenPluggedBrokenPluggedSlightpowerlevelfluctuationNoneNoneNone+SeeAppendixA,CommonSensorLineLoadSheetsforcompletedescription.12"2494(3)T17

APPENDIXhCONTROLSYSTEMSCOtSOHSENSORLIHEFAILUREANALYSISNINENILEPOINT2SHEET1Oi1IILIMEISYSISENORIFAILUREMO.IDIDNO.Ib22M027IPRIHARYEFFECTSlQEIHWDIFFERENTIALC33IIMACCllRATEDPSIGNALIPRESSURE(DP)SIGHALIIPLUGGEDIINACCURATEDIFFERENTIALIIPRESSURE(DP)SIGXALIIXOITIRROEEXIHAXIHNIDIFFERENTIALIIPRESSURE(DP)SIGNALIIPLUGGEDSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORONERLEVELEFFECTSILI-R60SHIGHLEVELIMDICATIOHIHoNEI(IHD)IILI-R605INACCURATESHQFDONHINONEILEVELIHDIIIILI-R608HIGHLEVELIMOMEIH.')ICATION(IHD)II*IILl-R60$INACCURATEMIDEIHOMEIRAICELEVELIHDIMOXEIIIMONEIIIXONECOMBINEDEFFECTSREACTORPRESSUREVESSEL(RPV)HBTOPHEADTAP{LEVELREFERENCEIEG)CL1~1 0

APPENDIXhCONTROLSYSTKNSCOtSONSENSORLINEFAILUREANALYSISNINEMllEPOINT2SHEETIOF3I)LINE)SYSIDB22IE22IPLUGGED)INACCURATNDPSIGNALX073RBROKENHAKIMl5DPSIGNALPLUGGEDjINACCURATEDPSIGHALM07$C)BROXEXHIMIHSIPRESSURESIGNAL)PLUGGEDINACCURATEPRESSURESIGNALX080C)BROKEN)MAXIHUHDlffKRENTIAL)PRESSURESIGNALIPLUGGEDlINACCURATEDIFFElmllTIAL)PRESSURESIGNALSENSOR)FAILUREIIDNO.TYPEPRIMARYEFFECTSX073LBROKENIMAXIMUMDPSIGNALSECOHDARYEFfECTS)LIS-N673LIHDHIGHLEVEL.DIV3~I/2HPCSUNLEVEL2)INITIATlONINHIBITED.)LS-H674LHIGHLEVEL8HPCSI/2SHUTDOWN.I)LIS-X673L,IHDINACCURATE.)DIV3,I/2HPCSUNLEVEL2)IHITIATlOHINHIBITED.)N674LHIGHLEVEL8HPCSI/2)SHUIDOQIINHIBITED.I)LIS-M673RINDHIGHLEVEL,IDIV3,I/2HPCSIlNLEVEL2)IHITIATIONIHHIBITED.lLS-H674RHIGHLEVEL8HPCSI/2SCRAMTRIP.I)LIS-N673RINDINACCURATE.)DIV3,I/2HPCSLEVEL2IHlTIATIOHIHHIBITKO.)LS-H674LEVEL8HPCSI/2)SCRAHTRIPINHIBITED.I(PIS-H678CIHDUNPRESSURE.IDIV3eRPS(C)I/2HIGH)PRESSURESCRAHANDPS-H679C,)DIV3,HS4(C)I/2RHRISOLATIONINHIBITED.I(PISN678CIHDINACCURATE.IDIV3oRPS(C)I/2HIGH)PRESSURESCRAHINHIBITED.(MS4(C)RHRISOLATIOH.I)LIS-H680CINDHIGHLEVEL.)DIV3,I/2RPS(C)LOVILEVEL3SCRAMTRIPIINHIBITED.IILIS-H680CIHDINACCURATE.IDIV3sI/2RPS(C),LEVEL3ISCRAHTRIPINHIBITED.RPVLIQUIDLEVELPRESSUREORPOVKRLEVELEFFECTSMONE)MOMEiHONEItHONE)NONE)HONEiNOMEIIXONE'HOMEINONE)MONEIHOHECOtSIREDKFFECTSRPVHI4-3404TAP(LEVELREFEREHCELKG)CL2.I

~~h APPENDIXhCONTROLSYSTEHSCOHHOMSENSORLIHEFAILUREANALYSISNINENILEPOINT2SHEET2OF3LINEISYSMO.IDSENSOR)FAILURE)IDMO.TYPEPRIHARYEfFECTSSECONDARYEFfECTSRPVLIQUIDLEVELPRESSUREORBNERLEVELEFFECTSCOHBIHEDEFFECTS2Ib22IMOSICIBROKENHAXIHUHD1iiEREMTIALPRESSURESIGNALIPLUGGEDIC33)M004AIBROKENIINACCURATEDIFFERENTIAL)PRESSURESIGNALIIIMAXIHUHDIFFERENTIAL)PRESSURESIGNALPLUGGEDIINACCURATEDIFFEREIITIALIPRESSURESIGNALlC33IM005BROKEN)HINIHUHRPVPRESSUREAND)HIHIHUHRPVDIFFERENTIALITEMPERATURE(DT)SIGNALSIPLUGGEDIINACCURATERPVIRESSUREANDIDTSIGNALSIILIS-N68ICINDHIGHLEVEL.)DIV3,I/2LEVEL2AND)LS-N684D,I/2LEVELI,HS4tISOLATIONINHIBITED.IfLIS-N681CIHDINACCURATE.DIV3yI/2NS4LEVEL-ly2AMDIBOPISOLATIOMSINHIBITED.IILl-R606AINDHIGHLEVEL.LS-K624ALEVEL8,I/3(TURBINEANDFEEINATER(W)(PUHPS(3)SHUTDONNTRIP.)IFSELECTED,LI-R608IND)HIGHLEVEL,LS-K626h/8llW)LEVELRECIRCPUHPh/8)RUNBACKINHIBITED.}IFCONTROLLIMG,FHFUNlllLL)DECREASE)Ll-R606AIHDIHACCURATE.K624ALEVEL8~I/3TURBIHEIANDFHPUHPSTRIPINHIBITED.)IFSELECTED,R608IHDIINACCURATE>K626A/8RECIRCPUMPh/8RUNBACKIHHIBITED.IFCONTROLLING:fVfIlNICONTROLIHACCURATEIIPl-R605INDLNRPVPRES-ISURE.833-K6618,K6658,)K6688RPVTUERHALSHOCKIHTERLOCKSRECIRCPUHPSh)AND8HIGHRPVDTSTARTIPERHISSIVEINHIBITED.I)Pl-R605INACCllRATE.RPVDTITHERHALSHOCKIHIERMCKSIHHISITED.IMONEIII)HOMEIRPVLEVELDECREASES.LOHILEVEL3SCRAHPROBABLE.I)NONENONEHOME)MONE)MONE)RPVLOQLEVEL3REACTORISCRhll.IlNOMEMOME12-24VS(3)RPVN14340TAP(CONT'D)CL2.2

APPENDIXhCONTROLSYSTEMSCOHHOHSENSORLIMEFAILUREANALYSISNINENILEPOINT2SHEET3OF3LINEISYSISENSORIDNO.MO.IDFAILURETYPEPRIMARYEFfECtSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSCOHBINEDEFFECTS2IC33MOOEAIBROEENMINIMUMPRESSURESIGHALINZImNRPVDTSIGNALIPLUGGEDIINACCURATEPRESSURESIGNALLTI15IBmmENIIIIHINNDPSIGNALIIIPLUGGEDIINACCURATEDPSIGNALIPI-R609IHDMMSTEAMDONEIPRESSURE~RECIRCPUMPSA&BICAVITATIONINTERLOCXRUNBACKITOLlIIGSET.IIPl-R609INDIHACCURATE.IRECIRCPIRIPSh&BCAVITATIOHIRUNL<CKTOIFNGSETIIHHll:ITED.IILI-IlSINDLOMLEVEL.IILI-115INDIMACCURATK.INONEIINONEIMONEIIMONEIREACTORPOWERDECREASES.IRPVHIGHLEVEL8TURBINEIRPVLEVELIHCREASES.ITRIPAMDREACTORSCRAM.IPROBABLEHIGHLEVELbTRIP/ISCRAH.IIMONEIMOME12-2477(4)RPVH14340oTAP(CONTEND)CL2.3

APPENDIXhCONTROLSYSTEttSNtONSENSORLINEFAILUREANALYSISHIREttILEPOlltT2SHEETIOF3LINEISYSISENSORNO.IDIDNO.FAILUREITYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSCOttBIHEDEFFECTS3IB22IX044BBRtNEXIINEIHtblDPSIGNALIPLUGGEDIXACCURATEDPSIGNALPLUGGEDINACCURATEDPSIGNALIB22IXOIBBIBROEEXIHIMIHNIPRESSURESIGNALIB22IM062BINNNEHIHIMIHtbIPRESSURESIGNALILR-R615IMDHIGHLEVELIMIXONEIFUELlADE.IILR-R615IXDIXACCURATE.IMOMEIIPR-R623BIHDLOWPRESSePOSTIHONEIACCIDENTttOXITOR.IIIIPR-R623BINDIXACCtmhTE.INONEIIIPIS-N678BINDLOWPRESS.IMONEIXONEIIIXONEIINQEIMONEE12IIPLUGGED1MACCURATEPRESSURESIGNALX058BIBROKNIttlNIÃltDPSIGNALIDIV2,RPS(8)I/2HIGHIPRESSSCRAHANDPS-H679BIDIV2,HS4(D)I/2RHRIISOLATIONINHIBITED.IIPIS-N6188INDIHACCURATEIMONEIDIV2,RPS(8)I/2HIGHIPRESSSCRAHINHIBITED.MS4(B)RHRISOLATION.IIdPIS-N658BINDttINDP.RHRINONEIINJVALVEF042BOPENINGIPERttlSSIVE.IMOXEIPLUGGEDIIXACCURATEDPSIGNALE12IXOSSCIBROKQIIHIXIHtblDPSIGXALIPLUGGEDIIMACCIIRATEDPSIGXALIRSSLT112IRSSIPT113IBROEEXIIPLUGGEDIIBROEEMIIPLUGGEDIIHAXltmHDPSIGNALIIIMACClUULTESIQthLIIIIINIHtbtPRESSURESIGNALIIINACCURATEPRESSURESIGNALIdPIS-N6588INDINACCURATE.IMONERHRINJVALVEF0428OPENINGIINHIBITED.IIdPISN658CINDHINDPRHRINOXEIIHJVALVEF042COPEHIKGIPERHISSIVE.IIdPIS-M658CINDINACCURATE.INOHEIRHRIHJVALVEF042COPENINGIIXHIBITED.IILlll2IXDHIGHLEVELIILl-112INDINACCURATEIIPl-113IMDLOMLEVELIIPl-113IHDINACCURATEIINONEIIMONEIIXONEIINOIEIRPVNl42004TAP(LEVELREFERENCELEG)IMONEINONEIXOIEIXONEIIMONEIIMONEIIXOXEICL3.1

APPENDIXACONTROLSYSTKHSCOHHOHSEHSORLIHEFAILUREAHALYSISMIHENILEPOINT2SHEET2OF3)LINEISYS)BEMSORIFAILUREIXO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOHKRLEVELEFFECTSCOHBIHKDEFFECTSIB22IMoaoalBROKENIHAEIIaaDPSIGNALIPLUGGEDIINACCURATEDPSIGXALIIIlE22IMOBIBIBROKENIIQXuSRIDPSIGNALIPLUGGEDlINACCURATEDPSIGNALIII$22IX091BiBROKENIIQXINNDPSIGXAL)LISX680AIHDHIGHLEVEL.IDIV2>>I/2RPS(B)QN)LEVEL3SCRAMINHIBITED.)LISN680BINDINACCURATE.IOTHKRHISE>>SA!KASBROKEN.IILIS-M68)BIHDHIGHLEVEL.IDIV2>>1/2NS4LOULEVEL2(ANDLS-H684B>>I/2NS4UN(LEVILIISOLATIOHSIINHIBITED.IILIS-H681BINDIHACCIJRATK.(MONE)HOWE1I(NOME)MONEIOTHERW]SE>>SANEASBROKEN.)II)LIS-H691B/FIHDHIGHLEVEL.INONE1MOXEiMOMEIINONEINONEIl(MOHEIM09lfPLUGGED(INACCURATEDPSIGNALIDIV2,I/2ADS(h)RHR(h)~ILEVELIAHDLS"H692B/FI/2)RCICLEVEL2IHITIATIOHIINHIBITED.LS-H693B/F(DIV2,I/2RCICLEVEL8ISHUIIuW.I)LIS-H691B/FIHDIHACCURATE.iHONE(XONE3B22M095BIBROKEN)HAXIIRRIDPSIGHALIPLUGGEDiINACCURATEDPSIGNALPLUGGEDIINACCURATEDPSIGHALB22IN402BIBROKENIIQXIlftRIDPSIGNAL(X402FIH693B/FDIV2,I/2RCIC)LEVEL8SHUTIXNHIHHIBITED>>IOTHERWISE,SANEASBROXKH.I)LIS-X695BIHDHIGHLEVEL.)MOXEIDIV2>>I/2ADSDNLEVEL3ITRIPPKRHISSIVEINHIBITED.I)I.IS-H6958IMDIHACCURATE.)XONE)OTHKRHISE>>SANEASBROKEN)LINE.tJATlISIHDHIGHLEVEL.DIV2,iMONEI/2RRCSLEVEL2ARI,SLCSIHITIATIOHAHDRKCIRCPUMP(AMDRVCUSHUnOWINHIBITED.I)ATlSIHDIHACCURATK,OTHERtHOWE)MISE>>SANEASBROKEN.lRPVN14-200~TAP(CONT'D)-)XOXE)XONE)NOMEINOXECL3.2

APPENDIXhCONTROLSYSTEMSCOt0tONSEXSORLIMEFAILUREANALYSISNIHEMILEPOINT2SHEET3OF3I)LINEISYS)SEXSOR)FAILUREIMO.IDIDMO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPtNERLEVELEFfECTSCOMBINEDEFFECTS3IB22lM403bIBROKENIMIMIMWPRIURESIGNALIATMSINDONPRESSUREDIV2gINONEI/2RRCSHIGHPRESSRECIRCPUMP,RitCUTRIPARDARI,SLCSIMITIATIOMIXHIBITFD.IMOMEPlRGKDIB22)R004BBROKENtPLUGGEDIB22ROOSBIBROKENPLUGGEDB35IM040IBROKENC33)X004BBROKENiINACCURATEPRESSURESIGNALIIIMIMIMlktPRESSURESIGNALI)INACCURATEPRESSURESIGNALMAKIMWDPSIGNAL)INACCURATEDPSIGNALIIMINIMUMPRESSUREAHDMAKIMW)RPVDIFFERENTIALTEMPERATURE(DT)SIGNALSINACCllRATEPRESSUREAXDRPV)DlFFEREtlTIALTEMPERATUREISIGNALSIIMAKIMWDPSIGNALiLl-R606BIHDHIGHLEVEL.1LS-K6248HIGHLEVEL8,I/3ITURBlHEAHDFHPUMPSTRIP.IFSELECTED'IR608IHDIHIGHLEVEL,LS-K626A/BONiNONEATMSINDIHACCURATEsOTHERtNONE)MISESAMEASBROKEN.III(Pltt004BINDMIMIMWPRESSIMOREII)PI-2004BINDINACCURATEINOMEIIIDPIR009INDHIGHLEVEL)NOXEIIIDPI,R009INDINACCURATEINOHEIIIK667hAXD668hONRPVPRESStNONE)TtlERMALSHOCKINTERLOCKSAND)IRECIRCPUMPShANDBHIGHIRPVDTSTARTPERMISSIVEIINHIBITED.I(SAMEASBROKEN.)MONEIMONElI)HONEI)HOMEIINOMEIIMOMEI)XONE)NOMEINACCURATEDPSIGNALILEVELTRIPAHDRECIRCPUMPlRUNBACKTOLFMGSETi-INHIBITED.IIFCOHTROLLIMGsFMFON(REDUCED.I)R606BIHDlltACCURATE.K624BILEVELBoI/3TURBINEAHDFHiPUMPSTRIPINHIBITED.IF)SELECTED,LI-R608IHDIHACCURATE,LS-K626h/BFM/IRECIRCPUMPTRIP/RUHBACKIIlAlIBITEDIFCOHTROLLIHGe)INACCURATELEVELCONTROL.RPVM142004TAP(CONT'D)iRPVLEVELDECREASES.EVER-)RPVLOQLEVEL3REACTORITUALLEVEL3SCRAMPROBABLE.tSCRAM.II]MOMEIHONECL3.3 II APPENDIXhCONTROLSYSTEttSCOttttONSEHSORLIHEFAILUREANALYSISHIHENILEPOINT2SHEETIOF2I)LINE)SYS)SENSOR)FAILURE)MO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOQKRLEVELEFFECTSCOtSIMEDEFFECTSIPLUGGEDI1NACCURATEDPSIGNLNO78A)BROKEN)HIMIHUttPRESSURESIGNALlPLUGGEDIINCCURATEPRIIIESIGNAL)RSS)LT116)BROXKN)PLUGGEDI)B22)NOBDA)BROKEN)tthElttUtlDPSIGNALINACCURATEDPSIGNLtthXINRtDPSIGNAL)PLUGGEDINCCllRATEDPSIGNALIB22NORIABROKEN)HAKItttNDPSIGNAL4)B22)HO73C)BROKEN)HAIIHUtiDPSIGNAL)llO730)LISN673C/GHIGHLEVELIHDlHONE)DIV3eLEVEL2oI/2HPCSIIHITIATIOHIHHIBITEOI)LSH674C/GDIV3yLEVEL8~)1/2HPCSSHUIDOQITRIP.I)N673C/GIHDINACCURATE.1/2)MONE)LEVEL2HPCSINITIATIONAHDI/2LEVEL8HPCSSRUTI'IttHIBITED.I)PIS-M67SAIMDLOttPRESSURE.)HONEIDIVIIRPS(A)I/2HIGH)PRESSSCRAMANDPS-H679A,)DIVIHS4(A)1/2TRIP(RHRI/2ISOLATIOHTRIP))INHIBITED.IlN678AIHDINACCURATE.DIVIHONEI~RPS(h)I/2SCRAttANDttS4(A)RHRISOLATIONIHHIBITED.IILI-116IMDHIGHLEVEL.NOHE))Ll-116IltDINACCURATE.)NOHEII)LIS-H6SOAINDHIGHLEVELINOHEIDIVlo1/2RPS(h)LEVEL3)SCRAMIHHIBITKD.I)N6&OAIHDINACCURATK,OTHER)liONE)MISE,ShtfEASBROXEN.IIIILISM681AINDHIGHLEVEL.IMOMENONE)NOHE)NOHE)NONE)NOMEI)MOHKI)MOHE)MOMEII)NONEPLUGGED)IHACCURATEDPSIGNAL)DIV1,1/2HS4LEVEL2AHD)LS>>H684hDIV1~1/2HS4)LEVELIISOLATIOltS)INHIBITED.IIN68lhIMDINACCURATE,OTHER-)WISE~ShtjKASBROXEH.HONE)NONERPVH14160oTAP(LEVELREFERENCELKG)Cl.4.I

APPEHDIXAICONTROLSYSTEMSCOHHONSENSORLINEFAILUREANALYSISMINENILEPOINT2SHEET2OP2IILINEISTSISENSORIFAILURE)ininNO.TYPEMO.PRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORONERLEVELEFFECTSCOlBINEDEFFECTSC33M004CBROKENHAKISBIDPSIGNALIPLUGGEDIINACCURATEDPSIGNALC33INODBCIBROKENNININQIPRESSURESIGNALfMAXIMUMRPVDTSIGNALPLUGGEDIINACCURATEPRESSURESIGNAL)LI-R606CINDHIGHLEVEL.)LS-K624CI/3HIGHLEVEIBITURBINEAMDBtPUlPTRIPS.I)R6O6CINDINACCURATE.)LS-X624CI/3HIGHLEVELB)TURBINEAHDFHPlÃPTRIPS)INHIBITED.I)K716BRUNSBACKASBRECIRCIPUMPSAHDFLANVlhRECIRCICAVITATIOHINTERLOCKS.II)K116BRECIRCCAVITATIOXIPREVEHTIOHINTERLOCKSIINHIBITED.IMOMEIHONEIDECREASEIMPSKRLEVELSIIHCREASEINRPVLEVEL.)PROBABLERPVHIGHLEVELIITURBIHETRIP/SCRAH.I)NOME/MOME(RPVHIGHLEVELBTURBINEtTRIPANDREACTORSCRAM+IIItMOHERPVN14)6OTAP(CONT'D)CL4.2

I'IiI~II'IIIIIIII;I'IIII',II'III'III'I'~I'II'II'I~:'fI:llI'.II'.II',III.IIIr:I~II:llII'l:II'IIh'II',II'II,I.I,I~'I.III.I'III:'.II'IIIII'.I'II.

I'II1..IIII'IIII:II,II'IIIIIIII.II'IIIIIIIII'I'11.t,l:IIII,1.I1,I':IIIIIIIIII'.II.II~.IIII'1I'II.IIIII'eIIltlrI'II'~'I

/~

APPENDIXhCONTROLSYSTKHSCOHHONSEHSORLINEFAILUREAHALYSISNINEHILKPOINT2SHEET3OF3LIXEXO.SYSISENSORIFAILUREIIOlnXO.TYPEPRIHARYEFFECTSSECONDARYEFFECTSRPVLIQUIDIEVELPRESSUREORPOVERLEVELEFFECTSCOHBIXEDEFFECTSIB22IIPLUGGEDIIIM403AIBROEEMINACCURATEDPSIGNALHIMIHNIPREBBURESIMlLPLUGGEDIINACCURATEPRESSURESIGNALSIB22IN402AIBROKENIHAXIHNIDPSIGNALII,I/2RRCSHIQIRPVDOHEIPRESSRECIRCPUHPsRVCUSYSITRIPAHDI/2ARI~SLCSINI-ITIATIOUSINHIBITED.IIATHSINDINACCURATE>OTHER-II'MISE,SANEASBROXEH.NONEIATHSINDHIGHLEVEL.DIVI,IXONEI/2RRCSDNLEVELIARI,ISLC'S~RECIRC>AMDRlCUTRIPSIINHIBITED.IIIIATHSAXDINACCURATE,OTHER-INONEIMISE,SAHEASBROXEX.IIIIATHSIHDLOUPRESSURE.DIVIXONEIXOXEIIIMOMEINONE12-2417(12)RPVH14204TAP(CONT'D)CL5.3

APPENDIXhCONTROLSYSmttSCOHUONSENSORLIMEFAILUREANALYSISHINKMILEPOINT2SHEET1OF2IILINKNO.SYSIDSENSORIDHO.FAILURETYPEPRltthRYEFFECTSSECONDARYEFfECTSRPVLIQUIDLEVELPRESSUREORPOttERIEVELEFFECTSCOtiBIMKDEFFECTS6)l22ROOSIBROKEN)ttAIItRBIDPSIGNALIIIIIPLUGGEDIIXACCURATEDPSIGNALIIRSSILT11$IBROKENttIHIHWDPSIGNALIIPLUGGEDIINACCURATEDPSIGNALIIIB22IM080CIBROKENIttIMltSBIDPSIGNALIPLUGGEDINACCURATEDPSIGNALIB22XOBODIBROKENttlMltfWDPSIGNALIPLUGGEDIXACCURATEDPSIGNAL)B22(M095A)BROKENHIHIHUttDPSIGNALPLUGGEDIINACCURATEDPSIGNALIDPI-R005IXDHIGHLEVEL,IFUELAREAIIR005INDINACCURATEIILI-ll5IXDuNLEVELLI-115IMDINACCURATE)LIS"N680CIMDllNLEVEL.)DIV3,LEVEL3RPC(C)1/2)SCRhtt.}NONEII)HONEI(MONEIIMONEIIMONEX680CINDINACCURATE.DIV)XONE3LEVEL3RPS(C)1/2SCRhttIIINHIBITED;IIILIS-M680DINDUNLEVEL.)NOMEIDlV4,LEVEL3,RPS(D)1/2)SCRAN.I)H680DIHDINACCURATE.DIVfXOHEIhiLEVEL3eRPS(D)I/2fSCRhttINHIBITED.I)LIS-H695AIHDIANLEVEL.)NONEIDIVI,1/2ADS(A)UNILEVEL3IMITIATIOH-I)X695hIHDINACCURATE.DIVfNONE1,LEVEL3~1/2ADS(h)IHITIATIOHINHIBITED.)HOXEII(NOMEI)NONE)RPVLOMLEVEL3REACTORISCRAMlmEXCOtSINEDVITtt)B22-M080D1/2SCRAMBEUN.IIMONE)RPVLOMLEVEL3REACTORSCRAMVHBICOtSIMEDttITHIB22-X080CI/2SCRAtlABOVE.I(NOtm)XONE)MONERPVH13104TAP(LEVELVARIABLELKG)CL6.1

APPENDIXhCONTROLSYSTBSCOtSONSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEET2OF2I)I,IXE)SYSSENSOR(FAILUREMO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSCONBINEDEDICTS6C33)M004ABROKENPLUGGED)MIMISWDPSIGNALINACCURATEDPSIGNALiLI-R606hINDlANLEVEL.)LS-K624ALEVELS,1/3)TURBIHEANDFWPUMPTRIPSIIHHIBITEO.)IFSELECTED,LS-K626h/bLOWILEVELTRIPRUNSBACKBOTHIRECIRCPUHPSTOLFHGSET.)IFCQITROLLIXG,FVFuW)INCREASES.I)R606)HDIXACCURATE.)LS-K6?4hANDIFSELECTED,ILS-K626A/BTRIPINHIBITED.)IFCOHTROLLIHG,LEVELICONTROLINACCURATE.)MONE(REACTORPOWERDECREASES.IRPVLEVELINCREASES,)PROBABLEHIGHLEVELSITURBIXETRIP,REACTORSCiUuI.IIINONEIMONEIRPVHIGHLEVELSTURBINEITRIPAMDREACTORSCRANPRE-ICLUDEDBYRPVIlNLEVEL3)REACTORSCRAHFltONB22-MOSOC)AHDXOSODABOVE.I)NOME12-2411(14)RPVN1310TAP(CONT'D)CL6.2

APPENDIXhCONTROLSYSTEMSCOMMONSENSORLIHEFAILUREANALYSISNINEMlLEPOINT2SHEETIOF2LIXEXO.SYSISENSORIDHO.FAILNEITYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFfECTSCOMBINEDEFFECTSIIR22IRSSB22IM027BROEENIMINIMNIDPSIGNALIPLUGGEDIINACCURATEDPSIGNALIBROEEMIMINIMISDPSIGXAIIPLUGGEDIWLCCURATEDPSIGNALXOSOBIREDEEMIMIMIMNIDPSIGXALIPLUGGEDINACCURATEDPSIGNALX095BIBROEEMIMIMIMNDPSIGNALPLUGGEDIINACCURATEDPSIGNALLT116IBROIEMIMIMIIGBIDPSIGNALIIIPLUGGEDIINACCURATEDPSIGNALILI-R605IMDLOMLEVELINOMEIIIR605IMDINACCURATEINOHEIIILIS-N6SOAIHDLOULEVEL.IMOMEIDIVleRPS(h)LEVEI3,l/2ISCRAMTRIPS.IILIS-H680AINDINACCURATE.IXONEIDIVI,RPS(A)LEVEL3SCRAMIITRIPINHIBITED.IILIS-H6SOSIHDLStLEVELINOXEDIV2~RPS(B)LEVEL3~I/2ISCRAMTRIPS.IIH6SOBIHDIHACCURATE.DIVIMOREI2oRPS(B)LEVEL3eI/2ISCRAMTRIPINHIBITED.IILI-116IHDUWLEVELIILI-116INDIMACCURATEIILISH695BIHDU%LEVEL.IDIV2,I/2LEVEL3AOS(B)IINITIATIOM.IIH695BIHD1HACCURATE.DIVIHONEI2oI/2LEVEL3ADS(B)IXIITIATIONIHHISITED.IHOMEIIXONEIIRPVLOMLEVEL3REACTORISCRAM%HEMCOMBINEDNITSIB22-HOSOBI/2SCRAMBEUN.IIXONEIRPVLOMLEVEL3REACTORISCRAMMHENCOMBIHEDNITHIB22-HOSOAI/2SCRAMABOVE.IINOMEINONEIINONEIIHONEIHOMERPVMl3,1904TAP(LEVELVARIABLELEG)CL7,1

APPENDIXhCONTROLSYSTEHSCOHHOHSENSORLINEFAILUREANALYSISHIREMlLEPOIHT2SHEET2OF2IILIXKISYSISENSORIFAILUREXO.IDIDNO.TYPE7IC33IM0048BROKENPRIHARYEFFECTSHINIHtNDPSIGNALPLUGGEDIIXACCURATEDPSIGNALIC33IN017IIIPLUGCKDIINACCURATEDPSIGNALIIBROKENIHINIHUHDPSIGXALIPLUGGKDIINACCURATEDPSIGNALC33IN004CBROKENIHINIHUHDPSIGNALSECOXDARYEFFECTSILI-R606BIHDQNLEVEL.IlS-K6248oI/3HIGHLEVELITIIRBINEAHDBtPUHPTRIPSIINHIBITED.IFSELECTED,LT-K626h/8flNILI:VELTRIP.BOTHRECIRCPUMPSRUHBACKTOLFHGSET.lfCOHTROLLIHG,FVFLOPIIUrmaSES.IIR6068INDINACCURATE.K6248I/3HIGHLEVELTURBINEANDIFMPUMPTRIPINHIBITED.IFSELECTED,K626A/8UNILEVELTRIPANDRECIRCIRUNBACKIHHIBITED.IFCOHTROLLIHG,IHACCURATELEVELCONTROL,IILI-R606CINDLOMLEVEL.ILS-K624CoI/3MICHLEVEL8ITURSIHEAHDRlPUHPTRIPSIIHHISITED.IIR606CIHDINACCURATE>OTHER-IMISE,SAHEASBROKEN.IILR-R60$IHDUNLEVELIIR608IHDINACCURATERPVLIQUIDLEVELPRESSUREORBNERLEVELEFFECTSIMOHEIREACTORPOVERDECREASESAXDILEVELINCREASES.PROBABLEIRPVHIGHLEVEL8REACTORISCRAH.IIIMONEIHONEIIHONE~IIIHONEIIHONECOHSIMEOEfFECTSINOXEIRPVHICHLEVEI8SCRAHPRE-ICLUDEDBYRPVLONLEVEL3ISCRAHFROH822-MOSOAANDBITRIPSABOVE.IIIMOMEIMOMEIMOXEIIIHONEIINONERPVN13190TAP(CONT'D)CL7.2

APPENDIXhCOHIROLSYSTEMSCOHHOHSEHSORLIHEFAILUREAHALYSISHIHENILEPOINT2SHEETIOFILIME(SYS(SENSORIDIDNO.B22IX013LFAILURE(PRIMARYEFFECTSHIMNWDPSIGNALPLUGGED(INACCURATEDPSIGNALB22X013RIBROKENHIXIHWDPSIGNALB22(M081CIPLUGGEDIINACCURATEDPSIGNALIIIIBNNEXIHIXIHlwDPSIGXALIPLUGGEDIINACCURATEDPSIGNALSECONDARYEFFECTS(LIS-N673LIXDUNLEVEL.IDlV3,I/2LOMLEVEL2HPCS(IHITIATIOH.LS-H674LHIGHLEVEL8HPCSSIIUIIXNM(INHIBITED.I(N673LIHDIHACCURATE.DIVI3,I/2MMLEVEL2HPCSIMITIATIOHIHHIBITED,OIHER-IMISE,SAMEASBROIEM.I(LIS-N673RIXDLOMLEVEL.IDIV3,I/2LOMLEVEL2HPCS(INITIATION.LS-M674R,I/2ILEVEL8HPCSTRIPINHIBITED.IIM613RIHDINACCURATE.DIVI3,I/2LEVEL2HPCSIHITIA-ITIOHIHHIBITEDoOTHERMISEs(SANEASBROKEN.I(LIS-N681CIXDONLEVEL.IDIV3,I/2LEVEL2NS4AND(LS-N684C,I/2LEVELIHS4IISOLATIOHS.I/2STANDBYGAS(TREATMENTIHITIATIOH.I(N681CIHDINACCURATE.DIVI3~I/2LEVELIAND2oHS4IISODLTIOHTRIPMllBlTED.RPVLlllUIDLEVELPRESSUREORPOMERLEVELEFFECTSNONE(MONE(NONE(MONE(NOMEIIIII(MONEIMOXEINONE~(XONEXONERPVH123404TAP(LEVELVARIABLELEG)CLS.I

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APPhCONTROLSYSTEHSCOtSONSENSORLINEFhlLUREANALYSISNINEMILEPOINT2SHEET1OiILINElSYSISENSORXO.IDIDMO.12IR228032ihlLURETYPERROEEXIPLUGGED)PRItthRYEFFECTS8AIMkIDPSIGNALINACCURATEDPSIGNALIC12MOOSIC12lIIIE22E011IPLUGCEDIIN057RROKEXI)PLUGGED)INACCURATEDPSIQULL8AEIHNIDPBIGNALINACCURATEDPBIQULLNNNEX8AXIHNIDPSIGNALPLUOGEDlINACCURATEDPSIQULLRROEEM8AEINWDPSICXAL)DPI-R009yR6028108DPIIR009eR602IMACCURATEIlDPIR005~R60381GHDPI)R005,R602INACCURATEII8657IND,HIGHDP8657IXDMLCCURATE)NONEl)MONEINONEI)NONEI)NONEIIMONERPVLlqUIDLEVELPRESSUREORPOMKRLEVELEFFECTSSECONDARYEFFECTSIDPI-R613IXDHIGHDPIFMMINONEDPI-R613INDIXACCURATEXONE)NOMEIIMONEIIMOXEI)NONEIIMOXEIfXOXEI)NOXEI(XONE12-2477(21)RPVNllBOTTO8HEADTAP(LEVELVARIABLELEG)CL12.1 4

APPENDIXACONTROLSYSTEMSCOtSOHSENSORLINEiAILUREANALYSISNINENILEPOINT2SHEET1OiIIILINEISYSISENSORIihlLUREIIDMO.TYPENO.IDPRIMARYEFFECTSSECONDARYEFFECTSRPVLlljUIDLEVELPRESSUREORPOVERLEVELEFFECTSCOHBIREDEFFECTS13IC33K31IPLUGGEDIINACCURATEDPSIGNALMO86CX086DBROKENMNIIGBlDPSIGNALIPLUGGEDIIIIINACCURATEDPSIGNALX003lBROKENNINIIGWDPSIGNALIil-R603hIHDUNSTEANFLON.)IiCOHTROLLING,FHFLMIDECREASES.I)il-R603AIHDINACCURATE.)IFCOHTROLLIHG,FNHlNIRESPONSEREDUCED.I(DPIS.N686CIHDUNFUN.(DPIS-N686DIMDUNFlANISTEANLINEAHIGHFUNHSIVs(CLOSERINHIBITED.IiN686C/DIMDINACCURATE,OTHUNISE,SAHEASBROKEN.)NONEIMOMEIIIIIMOME)RPVLEVELDECREASES,STABIL-(NONE1ZESATLOMBLEVELIIINOME12-2477(22)HAINSTEANLINEh,FEHOOSAMICHPRESSURETAPCL13.1 0-APPENDIXhCONTROLSYSTEHSCOHHOMSENSORLINEFAILUREANALYSISMINEHILEPOINT2SHEETIOFIIILINEISYSMO.IDSENSORIDMO.FAILUREITYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOVKRLEVELEFFECTS14C33X003Al6$mIMAXIHtHDPSIGNALIIIIPLUGGEDIINACCURATEDPSIGNALPLUGGEDIINACCURATEDPSIGNAL)l31)X086C(BROEEX)HAIISWDPSIGNALiX086D(FI-R603AIMDHIGHSTEAM1FUN.IFCONTROLLIXG,FVFlANiINCREASES.l)Fl-R603AINDINACCURATE.liCONTROLLINGiREDUCEDEV)FIANRESPONSE.IIDPIS-M686C/DHIGHSTEAMIFUNI.STEANLINEhHIGHIFLOUHSIVsCLOSURE.I(X686C/DINDINACCURATE.)STEANLIMEhHIGHFUAIHSIVoICLOSUREINHIBITED.]MOMEIMONE)IISIVCLOSURE,SUBSEQUENTIREACTORSCRAM.II(MONEIIHSIVCLOSlmE,REACTORSCRAMXONE)RPVLEVELINCREASES,STABIL-)MONElIZESATHIGHERLEVEL12-2471(23)HAINSTEANLINEA,FN-M005hLOUPRESSURETAPCL14.1

APPENDIXhCONTROLSYSTEMSCOHHONSENSORLINEFAILUREANALYSISNINEMILEPOINT2SHEETIOFILINEISYSISENSORNO.IDIDNO.FAILURETYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOVERLEVELEFFECTSCOMBINEDEFfECTSIE31IPLUGGEDIINACCURATEDPSIGNALIIIM081CIBROKENIHINIHWDPSIGNALNosmIPLUGGEDIINACCURATEDPSIGNAL1$IC33IM03BIBROKENIIIIMIHWDPSIGNALIFI-R6038INDIANSTEANFlAN.IlfCONTROLLIMG,FMFUNIDECREASES.IIR603BINDINACCURATE.IIfCONTROLLIMG,REDUCEDFNIFLOMRESPONSE.IIDPIS-N618C/DIANSTEANFLO'M.ISTEANLINEBHIGHFLOMHSIVaICLOSUREINHIBITED.IIN681C(DIMDINACCURATE,IOTHERMISE,SANEAsBaokEN.IRPVLEVELDECREASES,ISTABILIZESATLOMERLEVEL.IIINONEIIIINONEIIIIMoNEIMoMEIMONEIIIINONEINONE12-2471(24)HAINSTEAMLINEB,FE-N0058HIGHPRESSURETAPCL15.I

APPENDIXhCONTROLSYSTEMSCOtSOMSENSORLIMEFAILUREANALYSISNINENILEPOINT2SHEETIOF1I)LINE(SYS(SENSORIDIDMO.C33IN003BFAILURE)TYPEPRIMARYEFFECTSBROEENINAXIHWDPSIGNAL"IPLUGGEDiINACCURATEDPSIGNALIPLUGGEDIINACCURATEDPSIGNALE31)N087CIBROKENINAXIlfQIDPSIGNALIN087DSECONDARYEifECTS)FI-R603BHIGHSTEANFuN.)IFCOMTROLLIMG,WFUNIINCREASES.R603BIHDINACCURATE.IFCOhTROLLIHG,REDUCEDFWIFaOVamPOMSE.I)DPIS-MCi87C/DHIGHSTEANIFUN.STEANLIMEBNIGHIFLONItDIVeCLOSURE.I)N687C/DINDIHACCllRATE.ISTEANLIMEBHIGHHlNNSIia)CLOSUREINHIBITED.COMBINEDEFFECTS)NSIVCLOSURE,SUBSEQUEHT)REhCTORSCRAM.IIIMONEIJNSIVCLOSURE,REACTORSCRAIIHONERPVLIQUIDLEVELPRESSUREORBNERLEVELEFFECTS)RPVLEVELIMCREASESiINONEISTABILIZESATHIGHERLEVEL.IIINONEINONE12-2477(25)MAIMSTEAMLIHEB,FE-H005B1ANPRESSURETAPCLI.I

APPENDIXhCONTROLSYSTEMSCOSOMSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEETIOiIILIHX)SYSMO.IDSENSOR)FAILUREIIDMO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORHNERLEVELEffECTSCOtSIREDEFFECTS17IC33IE31IMOO3C)EmmNIMOGNDPSIGNALIPlljGGEDIINACCURATEDPSIGNALN088CIEROKEMINIMmlDPSIGNALINACCURATEDPSIGNAL)flR603IMDLOQSTEANFuN.)IfCOHTROLLIKG,FNfuNIDECREASES.I)R603CIHDINACCURATE.)lfCOHTROLLIHG,REDUCEDRt)HlNRESPONSE.I)DPIS-M688C/DQNSYPHFDN.iSTEANLINECHIGHFUNNSIVaICLOSURr.IMHIalTED.I(N688C/DIMDIHACCURATEsIOTNERNISE,SANEASRROEEH.IRPVLEVELDECREASES,ISTABILIZESATGNKRLEVEL.IIIMOME)NOREIIIIMOMEINONEINONE)NOHEINONE12-2477(26)HAIHSTEQlLINEC,FE-HOOSCHIGHPRESSURETAPCL17.1

APPENDIXACONTROLSYSTEMSCOMMONSEHSORLIMEFAILUREAMALYSISNINEMILEPOINT2SHEET1OFII)LINEISYSHO.IDSENSORIDNO.FAILURETYPEPRIMARYEFFECTSSECOHDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTSCOMBINEDEFFECTS14IC33M003CIBROKEN)!QXINRIDPSICHAL)PLUGGED)1MACCURATEDPSIGNAL)E31(MOddC)BROKEN)MAXIMIZEDPSIGNALlMObbD)Fl-R603CHICHSTEAMFlAN.)IFCOHTROLLIHG,FNFIAN)INCREASES.I)R603CINDINACCURATE.fIFCOHTROLLIHG,REDUCEDWfFIAWRESPONSE.(DPIS-M688C/DHIGHSTEAM)FIAT.STEAMLINECHIGH)FIATSMSIVaCLOSURE.I)M688C/DINDINACCURATE.)STEAMLIMECHIGHFuNMSIVa)CLOSUREINHIBITED.IMONE(MSIVCLOSURE.SUBSEQUENTIREACTORSCRAM.II)MOMEIIMSIVCLOSUREREACTORSCRAM)NONE(RPVLEVELINCREASES,IMOMEISTABILIZESATHIGHERLEVEL.IIfMONEHAINSTEAMLIHEC,FE-N005CIANPRESSURETAPCL18.1

APPENDIXhCONTROLSYSTEMSCOtSOMSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEETIOFILIMENO.SYSISENSORIDIDNO.FAILURETYPESECONDARYEFfECTSRPVLIQUIDLEVELPRESSUREORPOIKRLEVELEFfECTSCOHBIMEDEFFECTSIE31IN089CIN089D"BROKENHIMIHtRIDPSIGNALIPLUGGEDIMACCImATEDPSIGNAL19IC33IN003D)BROEENHINIHtRIDPSIGNALIIIIPLINYI1NACmRATEDPSIGNAL)FI-R603DINDUNSTEANFlN.)IFCONTROLLING,FMFllN)DECREASES.I)R603DINDINACCURATE.)IFCONTROLLING,REDUCEDFVIFueHESPONSE.I(DPIS"H689C/DuNSTEAMPION.ISTEAULINEDHIGHfuNHSIVs(CLOSCIRINHIBITED.I)N689C/DINDINACCURATE,)OTHEIaaSE,SAHEASBROXEN.)RPVLEVELDECREASES,ISTABILIZESATDNERLEVEL.IIiNONEINOMEIMOMEIMOMEIMONEl2-2417(28)HAINSTEAMLINED,FE-M005DHIGHPRESSURETAPCL19.1

APPENDIXACONTROLSYSTEMSCOtSONSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEETIOFII)LIMEISYSNO.IDSENSOR)FAILURE)IDMO.TYPEPRINARYEFFECTSSECOHDARYEFFECTSRPVLIQUIDLEVELPRESSUREORONERLEVELEFFECTS20C33PNGGEDINACCURATEDPSIGNALE31IN089CIIM089DRROEEMIHAXIISBIDPSIGNALPLUGGEDIINACCURATEDPSIGNALM003DIRROKEMINAXIIRRIDPSIGNAL)Ff-R603DINDHIGHSTEANIFLOlt.IFCOHTROLLINGoFV)FLOMINCREASES.I)R603DINDINACCURATE.IF(CONTROLLING,REDUCEDFVFllW)RESPONSE.I)DPIS-M689C/DNIGHSTEAN)FLOlt.STEAMLINEDNIGH)FLOMHSIVsCLOSURE.I)N689C/DIHDINACCURATE.ISTEANLINEDMIGSHlNHSIVaICLOSUREIMRISITED.IRPVLEVELIHCREASESoISTABILIZESATNIGHERLEVEL.II)NOREII)HSIVCLOSURE,SUBSEQUENTIREACTORSCRAIlIIINOMEI)MONEIlI)HSIVCLOSURE,REACTORSCRAllINOMEi~~eve/colHAINSTEAHLIHED,FE-H005DLOMPRESSURETAPCL20.I

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APPENDIXACONTROLSYSTEMSCOHHOHSENSORLIMEFAILUREANALYSISNINENILEPOINT2SHEETIOiIIILINEISYS)SENSORIFAILUREIMO.IDIDMO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOORLEVELEFFECTSCOMBINEDEFFECTS23IC33IM0025IBROKENINMINWDPSIGNALIPLUGGEDIINACCURATEDPSIGNAL)Fl-R604BIMDilNFMFUNtFS-K6ISA/BRECIRCPUMPSTRIP)TOLFIIGSET.IiCONTROL-ILIMO,FVFUNINCREASED.IIR-604BIHDINACCURATE.IK61$h/BFVLINEBLOMFUNIRECIRCPUHPSTRIPINHIBITED.lfCONTROLLIHG,REDUCEDWlYIOQCHANGE/RESPONSE.IREACTORPONERDECREASES,RPVIRPVHIGHLEVELBTURBINELEVELINCREASES,PROBABLEITRIPAMDREACTORSCRAM.)MIGMLEVEL8TURBINETRIP)ANDSCRAII.I(NOMEHAINFEEWATERLINEB,FE-H001BHIGHPRESSURETAPCL23.I

APPENDIXhCONTROLSYSTEMSCOMMONSENSORLINEFAILUREANALYSISMINEMILEPOINT2SHEETIOF1)LINEISYSMO.IDSEHSORIFAILUREIDMO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVI.IQUIDLEVELPRESSUREORPOVERLEVELEFFECTSCOMBINEDEFFECTS24IC33MOO2BIBROmIMAXIMlNDPSIGNALlIPLUGGEDIINACCURATEDPSIGNAL)Fl-R604BIHDHIGHRfFLtN.)FS-E618A/BF11LINEBUN)FUNRECIRCPUMPSTRIPIHHIBITEDIFCONTROLLING4FQNDECREASES~I)R604BIHDINACCURATE.IFiCOHTROLLIHG,FVFIOMCHANGE/RESPONSEREDUCED'THERHISE~ISAMEASBROEEN)RPVLEVELDECREASES,IRPVllWLEVEL3REACTORIPROBABLEllNLEVEL3SCRAM.)SCRAM.)MONEII12-2477(33)MAINFKEDVATERLIHEB,FE-HOOlBUNPRESSURETAPCL2.I

APPENDIXhCOHTROLSYSTEMSCOHHOMSENSORLIMEFAILUREANALYSISMINENILEPOINT2SHEETIOFII)LINEISYSISENSORIFAILUREIMO.IDIDMO.TYPEPRIMARYEFFECTS'ECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOIIERLEVELEFFECTSCOMBINEDEFfECTS2SICWII2CMH-IBROEEMIPsnhI)2CMH-PSIAAI)lCMH-IPLUGGEDIHIMIHWPRESSURESIGNAL)2CNN-PIOAfEEDPUHPSUCTION(SLIGHTDECREASEIMRPVPRESSUREQNANNUNCIATION,)LEVEL.REACTORPOORISINDICATIOMSTARTSSTANDBY)REDUCED,fCONDENSATEBOOSTERPUMP,)TRIPSFEEDPUMP2FNS-PIA,)FIANTRUNBACKTO6$PERCENT)OFRATEDLOAD.IINACCURATEPRESSURESIGHAL)INDICATORPIIOAIMACClSATR.)PUtlP280-PlhlllLLCOHTIHUE)TORUMIFSUCTIONPRESSUREl1$LMRESUL'IIHGINPUMP)DAMAGE.STANDBYCONDENSATEIPUMPSTARTINHIBITED.)MONEfMONEREACTORFEEDMATERPUMPhSUCTIONLIHETAPVlbh)MOTE:ONLYhLINEINSTRU-(MENTSLISTED,BAHDCLIMEIHSTRUHENTSAMDEFFECTSISIHIMt.ICL25.I

APPEHDIXACOHTROLSYSTEHSColQIOHSENSORLINKFAILUREAHALYSISHIHKttILKPOINT2SHEET)OiILINKNo.SYSIDSENSORIFAILUREIIDNO.TYPEPRIttARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTS~COHBINKDEFFECTS26DSR2DSRLT65A2DSR-Ls68h2DSR-LS6lh)2DSR-L868A)2DSR-I,T68h)BROKENIIIIIIIIII)IiINITIALSTAHDPIPKLEVEL)ABOVEBROKENLIHK,ALLIHSTRUHKHTSOHSTANDPIPEISENSEDNLEVEL.PLUGGEDIALLIHSIRUHKNTSSENSEIINACCURATEPRKSBURE.IBROKENIliLHITIALSTANDPIPELEVELIBKMMBRGKENLINE,ALLIIHSTRUHEHTSONSTANDPIPEISKHSKHIGHLEVEL.)"HolsTUREsEPARAT0RREHEATERIIDRAIHSTROUBLE"ANNUNCIATION.IIRKHEATERDRAIHIIascslvaaZDSR-TK6AI)HORHAL'MATERLEVELDRAINICONTROLVALVES2DSRIVK65hiI)2DSR-LVY65h,ZDSR-LVZ65A,IAHDHIGHMATERLEVELDRAINICONTROLVALVE2DSR-LV68h)CLOSES.PARTIALLOSSOiIFEEWATERHEATIHGAT6TH)POIHTHEATERS2R5-E6A,)I2R5-E68,AND285-K6C.IDRAIHRECEIVERLEVELMILLIINCREASE.I)"ttOISTURKSEPARATORRKHEATKRIDRAINSTROUBLE"ANNUNCIAI)TIOHDRAINVALVESI)2DSR-LVX65h,ZDSR-LVY65A)II2DSR-LVZ65A,2DSR-LV68A)OPEH.PARTIALLOSSOFIFEKDMATERHEATIHGAT6THIPOINTHEATERSZR5-E6hiI)ZR5-E68,AND2R5-86C.)REHEATSTEhttSUPPLYVALVES)Rt?SS-AOV92AANDBCLOSE.)Loss0FB0THttolsTURE)sEPARATDRREHKATEas.REHEATIISTEANCOHTROLVALVEDRAIHIIVALVES2HSSttOV9hANDBOPEN.IIIIHIGHLEVELINDRAINRECEIVERIItthYNOTOPENDRAINVALVEII2DSR-LV68hRESULTIHGIN)MATERBACKUPTORKHKATER.SLIGHTDECREASEINFEEWATKRTKHPERATUREMILLRESULTIHIHCREASEOFCOREPOMKRMHICHIMlLLBKCotfPKHSATEDBYttODULATIONOFCOREFlAW.INCREASEIH2DSR-TK6ALEVELMILLRESULTIH'MATERBACKUPToREHEATER.TEHPERATUREoiISTEANTOLOMPRESSURETURBINEMILLREDUCE.THIStthYRESULTINTURBINEVIBRA-TIONS,TRIPiAHDREACTOR8CRAH.NONESLIGHTDECREASEINiKEWhTKRTEHPERATUREMILLRESULTINIHcaahseoFcoaKPOMKRMHlcHIMlLLBECOHPEHSATEDBYttODULATIOHOFCOREFlANLOSSOiHOISTURKSEPARATORREHEATERREDUCESDNPRESS.TURBINEEFFICIEHCY.ZHSS-ttOV9hAHDBPOSSIBMTURBINEVIBRATIONS~)HONKTRIPqAHDREACTORSCRAM,12-2477{35)ttOISTURESEPARATORRKHEATERDRAINRECEIVERTAHXhLEVELSTAHDPIPKINOTEsONLYhLINEIHSTI?U-IttKNTSI,ISTKD,BANDCLINE)IHSTRUHKHTSANDEFFECTSISIHILAR.ICL2~I

APPENDIXhCONTROLSYSTEHSCOHHOHSENSORLIHEFAILUREANALYSISHIHENILEPOIHT2SHEETIOFIIII)LINE)SYS)SENSOR)FAILURE)NO.IDIDHO.TYPEPRIMARYEFfECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTSCOMBIREDEFFECTS27IHDL)II2HDL-LSIA2HDL-L87ABROKENIIFINITIALSTANDPiPELEVEL)ABOVEBROKENLIHE,ALL)IHSTRUHEHTSONSTANDPIPE)SENSELOMLEVEI..IBROKENIIFINITIALSTANDPIPELEVELIBELOMBROKEHLINE>ALLIHSTRUHENTSONSTANDPIPEISEHSEHIGHLEVEL.IPLUGGEDIALLIHSTRUHENTSSEHSEIINACCURATEPRESSURE)NONEISTPOIHTHEATERMATERLEVELIHIGHANNUNCIATION.4THPOINTHEATERDRAINPUHPI2HDL-PlhTRIP.LOSSOFFLOMITOCONDENSATESYSTEH.tHOISTURESEPARATORDRAIN)RECEIVER2DSH-TK4hANDTK4BHORHALDRAIHVALVESt2DSH-LVX75hAND2DSH-LVX75BtCLOSE.6THPOINTHEATERIHORHALDRAINVALVE2HDH-LV6hCLOSE.CONDENSATEIiEATERISTRINGhOUTLETVALVE2CNH-HOV32AAHDINLETVALVE2CNH-HOV33hCLOSE.IfPOSSIBLECONDENSATEHEATERISTRING"A"ISOLATIONLOSS~IIAiEHISTPOINTHEATER)2CHH-ElhLEVELISNIGH,)MATERINDUCTIOHINTOTURBINEIMILLRESULTIHTURBINEIVIBRATIONS,POSSIBLETllRBIHEITRIPLEADIHGTOREACTORSCRAM.I(NONEINONE)HONE)NONEILOSSOFCONDENSATEHEATERINONE)STRINGAREDUCESFEEDMATER)TEHPERATURETOREACTOR>CORE)POMERIHCRFASES.REACTORIRECIRCULATIONFLOMDECREASESIIREESTABLISHIHGPOMERLEVEL.I12-2477(36)ISTPOIHTCONDENSATEFEEDMATERHEATERhLEVELSTAHDPIPEIHOTE:ONLYhLINEIHSTRUIHENTSLISTEDiBANDCLINEIHSTRUHEHTSAHDEFFECTSISIHILAR.ICL27.I

APPENDIXhCOHTROLSYSTEHSCOHHOHSENSORLIHEFAILUREAHALYSISHIHENILEPOINT2SHEETIOFIIII)LIHE)SYSJSEHSOR)FAILURE)HO.IDIDHO.TYPEPRIHARYEFFECTSI28)HDLI2HDL-IBROKEHIHIGHLEVELSIGNALLSSAIPLUGGEDIIHACCURATEPRESSURESIGNALSECONDARYEFFECTS("2NDPOINTHEATERWATERILEVELHIGH"AHHUNCIATION.I4THPOIHTHEATERDRAINPUHP2HDL-PlhTRIP.HOISTUREISEPARATORDRAINRECEIVERS2DSM-TK4AAND2DSH-TK4B)HORHALDRAINVALVES2DSH-LVX75hANDI2DSH-LVX75BCLOSE.6THIPOINTHEATERNORHALDRAIHVALVE2HDII-LV6hCLOSES.CONDENSATEHEATERSTRINGhJOUTLETVALVE2CNH-HOV32hIAHDINLETVALVE2ChH-HOV33AICLOSE.IPOSSIBLECONDENSATEHEATER)STRIHG"h"ISOLATIONLOSSIWNEH2NDPOINTHEATER2CNH-E2ALEVELISHIGH.IHIGHWATERINDUCTIOHINTOITURBINEWILLRESULTIN)TURBINEVIBRATIONS,POSSIBLEITURBINETRIP,REACTORSCRAH.)HONEINONERPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSILOSSOFCONDEHSATEFEEDWATERINONEIHEATERSTRINGA.REDUCESIIFEEDWATERTEHPERATURETOREACTOR,COREPOWERIHCREASES.)REACTORRECIRCULATIOHFLOWIDECREASES,REESTABLISHIHGIPOWERLEVEL.COHBIHEDEFFECTS12-2477(37)2HDPOINTCONDEHSATEFEEPWATERHEATERhTAPVISA(LEVELREFERENCELEG))NOTE:ONLYALINEIHSTRU-IHENTSLISTEDoBANDCLINEINSTRUHEHTSAHDEFFECTSISIHILAR.ICL2B.I

APPENDIXhCOMIROLSYSTEMSCONHOHSEHSORLIMEFAILUREANALYSISMIMEMILEPOIHT2SHEETIOFII(LIME)SYSISENSOR)FAIUJRE)IDlDNO.TYPEMO.PRINARYEFFECTSSECONDARYEFFECTSRPVLlqUIDLEVELPRESSUREORPOlKRLEVELEFFECTS29MDL)2HDLIBROKENIQWLEVELSIGNALI2HDPOINTHKhTERMATERLEVELIPOSSIBLETURBINETRIPoiMONEPLUGGEDI(SANKASBROXKNLOIIANMUMCIATIOHyOTHKRMISE~)REACTORSCRAMISHEASPLUGGEDLIME2SiABOVEIINACCURATEPRESSURESIGNALISANEASBROKEN12-2477(38)2HDPOINTCOMDEHSATKFEEWATKRHEATERhTAPVI9h(LEVELVARIABLELEG)tNOTE:ONLYhLINEINSTRU-IMENTSLISTED'ANDCLIMEIHSTRUHENTSAMDEFFECTSISIMILAR.ICL29.I Iv APPENDIXhCONTROLSYSmfSCOIDIONSENSORLINEFAILUREANALYSISHINEIflLEPOINT2SHEETIOFIIII,INE)SYSISENSORIDIDNO.PAILURK)TTPKPRIMARYKfFECTSSECONDARYEFFECTSRPVLIqUIDLEVELPRESSUREORPOMERLEVELEffECTS30HDLI2HDL-ILT3A)28DLLS9A2BDLaIS13hI2HDLLS23A)2BDL-LT23ABRDKKM(IFINITIALSTANDPIPELEVELIABOVEBROKEXLINE,ALL)IMSTRNfEHTSOXSTANDPIPE)SKXSKLOMLEVELSBROKEN)IPINITIALSTANDPIPELEVELIBELOMBROKEMLIME>ALL(IHSTRINEHTSOHSTANDPIPEISENSEHIGHLEVELSIPLUGGEDIALLIMSTRUHEHTSSENSEIINACCURATEPRESSUREI~'3RDPOIHTHEATERMATERILEVELPAPAHNUNCIATlOH.j3IIDPOINTHEATER2CHlf-E3h)HORlfhLLEVELDRAINVALVE)2IIDL-LOV3hAHDHIGHLEVEL(DIIAIMVALVE2HDL-LV23AICASKIIEATERMATERLEVELIMl!.LINCREASE.LOSSOFCON-)DEHSATKHEATIXGAT3RDPOINT)BEATERDRAINCOOM'2QII-DCL3A.I)"3RDPOINTBEATERMATER)LEVELHIGH"ANNUIICIATIOH.)DRAIXVALVES2HDL-LV3AAND]2HDL-LV23AOPEN.3RDPOIHTIHEATER2CHH-E3AEXTRACTION)STEANISOLATIONVALVEI2ESS-IIOV15AAHDHON-RETURN(VALVE2ESS-HRVI6ACLOSE.(LOSSOiCONDENSATEBEATING)AT3RDPOIHTHEATER2CIIH-E3A)ANDDRAINCOOLER2CNII-DCL3A.I)HIGHMATERLEVELHAYNOTISOLATEHEATEREXTRACTION)STKhffVALVES.)DECREASEIHFEEDMATERtNONEITEMPERATUREMILLRESULTIX)INCREASEOFCOREPOMER)tCOlfPEHSATEDBYIfODULATIOMOPI)COREPLOM.IIIIPOSSIBLEMATERIHDUCTIOMINTOTURBINERESULTIHGllfITURBINETRIP,REACTORSCRAIf.MOME)SLIGHTDECREASEINFEEDMATER]MOXK]TEMPERATUREMILLRESULTIN)IINCREASEOFCOREPOMERI)COHPEHSATKDBYIIODULATIOMOF()COREFLOM.INCREASEIHiHEATERMATERLEVELPOSSIBI.YIMILLLEADTOMATERINDUCTIOHlINTOTURBINERKSULTIHGINITURBIXETRIP.12-2471(39)3RDPOIHTCONDENSATEFEEDMATERHEATERhLEVELSTANDPIPE)HOTEiOHLYhLINEIHSTRU-IIfENTSLISTED,BANDCLIXEIINSTRUMENTSAMDEFFECTS)SIMILAR.ICL30.1

APPEXDIXACONTROLSYSTENSCONNOHSENSORLINEFAILUREAHALYSISMIHENILEPOINT2SHEETIOFIlLIMEISYSISRHSGR)FAILURENO.IDIDNO.TYPEPRINARYEFfECTSSECOHDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFfECTSCONEINEDEffECTS31XDLI2HDL-)I.T4AI2HDL-LSIDA)2HDLL814A2HDL-LS24AI2XDL-LT24AIBROKENIIIIIIlIIIIBROKEN(ALLINSTRUMENTSOHSTAHDPIPH)SENSEuJMLHVEL,IFINITIAL)STANDPIPELKVHLABOVEBROXRXiLIME.)ALLIMSTRUHHMTSONSTANDPIPEtSENSEHIGHLEVHLrIFINITIALISTAXDPIPHLEVELBHLOMBROHKXILINE.tPLUGGED(ALLIMSIRUNEMTSSEMSHICONSTANTPRESSURE)"4THPOINTHEATER2CNN-E4h)MATERLEVELLOM"AHHUHCIA-)TIOH,FALSEIHDICATIOH.2HDL)LIC4h.HORNALLEVELDRAIXIVALVE2HDL-LV4AAMDHIGHI)LEVELDRAIHVALVE2HDL-LV24hfiCLOSE.4THPOINTHEATER)MATERLEVELINCREASES.LOSS))OfHEATERDRAIHPUMPihfMTOI)CONDENSATESYSTE!l.IlITHPOINTHEATERMATERLEVELHIGHANNUNCIATION~IFALSEINDICATION.2HDL-LIC4A.IIVALVES2HDLLV4AAHDII2NDLLV24AOPEN~LOSSOfII4THPOINTHEATERDRAINPUNP)FLOMTOCONDENSATESYSTEN.)5THPOINTHEATERNORNALIDRAIHVALVE2HDL-LV5ACLOSESItMOISTURESEPARATORDRAIH)RECEIVERTAHE2DSN-TX4hAND)TK4B.DRAINVALVES)2DSN-LVX75AAND2DSN-IVX75B)CLOSE.EXTRACTIOHSTEANIISOLATIOHVALVE2ESS-NOV22A)AHDNOM-RETURNVALVE)2RSS-NRV23ACLOSE.LOSSOFICONDENSATENRATIXGAT4TH)POINTHEATER.IIHIGHMATERLEVELIHHEATERI2CHN-E4AHAYHOTISOLATE)tHEATEREXTRACTIONSTEANI)VALVES.INCREASEIXHEATERMATERtLEVELMILLLEADTOMATERIHDUCTIOMINTOTURBIHEPOSSIBLYRESULTIHGIHTURBINETRIP,REACTORSCRAM.DECREASEIHFEEDMATER(NOXHTENPERATlJREMILLRESULTIHINCREASEOFCOREPOMERMHICHIMILLBECONPENSATEDBYINSULATIOHOFCORKFLOll.POSSIBLEMATERIHDUCTIOH(XOXHINTOTlJRBINERESULTINGIHTURBINETRIP,REACTORSCRAN.12-2477(40)4THPOINTCONDENSATEFEEDMATERHEATERhLEVELSTANDPIPEiNOTE:ONLYhLINEIMSTRU-INEHTSLISTEDrbANDCLINEIHSTRINENTSANDEFFECTSISINILAR.ICL31.I

APPENDIXhCONTROLSYSTEttSNtOHSENSORLINEFAILUREANALYSISMIMENILEPOINT2SHEETIOFIIILINEISYSISENSORIFAILUREIlm.IDIDMO.TYPEPRIllARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTSCOttBIREDEFFECTS32IHDLI2HDLLTSA2tmL>>LSIIA2HDLLS25iI2HDL-LT2SAI2HDL-IBRORRMIIIIIIIIIIIIBROKENIIFINITIALSTANDPIPELEVELIABOVEBROKENLINE,ALLIINSTRNIKMTSOXSTAXDPIPEISENSELOQLEVELIIFINITIALSTANDPIPELEVELIBELOMBROtmXLINE,ALLIIMSTRUttEHTSOMSTANDPIPEISENSEHIGHIIVILoIPNGGRDIALLINSTRlWKXTSSEltSEIINACCURATEPRESSURE.I"STHPOINTHEATERMATERILEVELLOM"AHHttHCIATIOH.ISTHPOIHTHEATERXORtthf.IMATERLEVELDRAINVALVE.II2HDL-LVSAANDHIGHMATERILEVELDRAINVALVE2llDL-LV25AIICLOSE.PARTIALLOSSOFCOH-IIDKXSATKHEATINOAT4THPOIHTIIHEATER2CNtt-E4h.ST8POINTIIHEATER2CNH-ESAQATKRLEVELIIMILLIltCREASR.IIII"STHPOIHTHEATERMATERIILEVELHIGH"ANNUNCIATION.IIDRAIXVALVES2HDL-LVSAANDI2HDL-LV25hOPEH.PARTIALLOSSOFCONDENSATEHKATIXGIIAT4THPOINTHEATERI2CNtt-K4A.STHPOINTHEATERI2CNtt-ESAEXTRACTIONSTEANIISOLATIONVALVE2ESS-ttOV2SAICLOSES.LOSSOFCONDENSATEIHEATIHGATSTHPOINTHEATERI2CtOI-RSA.IIHIGHMATERLEVELIHHEATERI2NH-ESAtthYNOTISOLATEImamaRXTRACTIOXSTRAHIIVALVE.ISLIGHTDECREASEINFEKDMATERIXONETEMPERATUREMILLRESULTIHIINCREASEOFCOREPOMKRMHICHIMILLBECOMPENSATEDBYMODULATIONOFCOREFLOQ.INCREASEIMHEATERMATERLEVELMILLLEADTOMATERINDUCTIOtlINTOTURBINERESULTIHGIMTURBINETRIP,REACTORSCRhtt.DECREASEIXFEEDMATERIMOMETE!fPERATUREMILLRESULTIMIINCREASEOFCOREPOQKRMHICHIMILLBECOtiPKMSATEDBYttODULATIOHOFCOREFLOQ.POSSIBLEltATERIHDUCTIOXIXONElltTOTURBINERESULTINGIMTURBINETRIP,SCRAM.12-2477VII)STHPOINTCONDENSATEFEEDMATERHEATERALEVELSTAXDPIPEINOTE!ONLYALINKINSTRU-MENTSLISTED'ANDCLINKINSTRUttKXTSAXDEFFECTSISIMILAR.ICL32.I

APPENDIXhCONTROLSYSTKtlSCotSONSENSORLINEFAILUREANALYSISHIHKNILEPOINT2SHEETIOFI$3IHDHI2HM"IBRGKKNLT6A2HDH-LSIA2HPgaLSSAI2MDH-ILS26AII2MDH-ILT26AIIIIBRDKKHIIFINITIALSTANDPIPELEVELIISABOVEBROKENLIHEiALLIIHSTRQIKMTSOMSTANDPIPEISENSEllNLEVEL.IIFINITIALSTANDPIPELEVELISBELOMBROKENLINE,ALLINSTRUtGUITSOItSTANDPIPEISKMSKHIGHLEVEL.PLUGGEDIALLIHSTRWEHTSSKHSKIIMACCURATKPaKBSURKIILINKIsYsIsENsoRIFAILURE.IMO.IDIDMO.TYPEPRIHARYEFFECTSSECONDARYEFfECTSI6THPOINTHEATERMATERILEVELUN"ANNUNCIATION.SIXTHPOINTHEATER2fMS-K6hINORMALMATERDRAIHVAI.VEI2HDH-LV6hANDMICHMATERILEVELDRAIHVALVE2HDH-LV26hIMILLREHAIHFULLYCLOSED'HEATERMATERLEVELMILLIINCREASEPARTIALLOSSPFICOHDKMSATKHEATINGATFIFTHIPO'IMTHEATER2CMH-K5A.II678POINTHEATERMATERLEVELIMICHAMHilNCIATION.DRAIHIVALVES2HDH-LV6AAMDLV26hIOPEN,PARTIALLOSSOFCOMIDENSATE'HKATIMGATHEATERSI2CNH-ESA,2FMS-E6AEXTRAC-ITIONSTEANISOLATIOHVALVEI2ESS-HOV3hoHON-RKTURHVALVEI2ESS-MRV34ASCAVENGINGSTEANINLETVALVE2DSR-ADVSIA,AHDIHOISTURESEPARATORRKHEATERIDRAINRECEIVER2DSR-TK6AAMDITK68DRAINYALYEsI2DSR-LVX65AANDLVX65B.ICLOSE.LOSSOFTOTALFEEDIMATERHEATINGAT2FMS-K6h.IIMICHMATERLEVELHAYHOTIISOLATEHEATER2FMS-K6AIEXTRACTIOMSTEAttVALVES.RPVLIQUIDLEVELPRESSUREORPOMKRLEVELEFfECTSISLICHTDECREASEIMFKKDMATKRIMOMEITEttPKRATUREMILLRESULTINIINCRKAGKoFcoaKPerKRICOMPENSATEDBYtiODULATIONOFIICOREFLOM.INCREASEINIHEATERMATERIXVELMILLLEADIITOMATERINDUCTIOHIHTOITURBINEREsULTINGINTURBINEIITRIP,aKACToaSCRAH.IIDECREASEIHFKKDMATKRIMOMEITEMPERATUREMILLRESULTINIINcaEASF.oFcoaEPeeRIIcoHPKMSATKDBYHGDULATIONoFIIcoREFLet.IIIIIIIIPOSSIBLKMATERINDUCTIOMIIHTOTURBINERESULTINGINITURBINETRIP,REACTORSCRAH.6THPOIHTCONDENSATEFEEDMATERHEATERhLEVELSTANDPIPEIMOTE:ONLYhLINEINSTRU-IHKHTSLISTED,BANDCLINKIHSTRUHENTSAMDEFFECTSISIHILAR.ICL33.1

I'I~I.'IIIIIII'I.I'IInIII'I~IIIII'IIIIIII'IIII:III'l:IIII'I'I'II.II'IIIIs,I:I.

APPENDIXhCOHTROLSYSTEtfSCfHfMONSENSORLINEFAILUREAHALYSISMIMENILEPOINT2SHEET1OF2fI)LINE)SYS)SENSOR)FAILURE)NO.IDIDHO.TYPEPRIMLYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOHERLEVELEFFECTSCOtfBINEDEFFECTS35ItfSS)2MSS-)RROEEHPT103)2HSS-PTI04)2tfSS-)PTI77)I(C33-IR007))tfIMINNPRESSURESIGNAL)OPENSTHEPOLUNING:)TUllBIHESTOPVALVEABOVE)SEATDRAINVALVES,2MSS-MOV2IA,2tfSS-MOV2IBgI2MSS-MOV21C~2MSS-MOV21DI)MAIHSTEAMLIMEHEADERDRAINVALVES'MSSAOV191~)2MSS-AOV]94>2MSS-AOV203~)2tlSS-AOV205)2tfSS-AOV209I)RKHEhTSTEAMLOADCOHTROLIAtfDPIPINGDRAINVALVKe)2tSS-AOV201;EXTRACTIOM)HEADERDRAINVALVES,2DTM-AOVI04,2DIM-AOV1051)EXTRACTIONLINKDRAIN)VALVES,2DIM-AOV2A,)2DTM-AOV2B,2DTN-AOV2C,2DTM-AOV3A,2DTM-AOV3B,)2DTM-AOV3C,2DTM-AOVSA>)2DTtf-hOVSB,2'-hOVSC,2DTMAOVSA~2DTMAOVBB~2DTM-AOVSC;AUXILIARYSTEAM)TOOFFGASDRAINVALVE,2ASS-AOV144RKBOILERSTEAM)LINKDRAINVALVES,2DTM-AOV104~2DTM-AOVI281)TURBINESTEAMIHLETLOft)POINTDRAINVALVES,I2MSS-MOVIOho2MSS-MOVIOCs)AUXII.IARYSTEAMLINEDRAINIVALVES>2DTMAOV7A~)2DTM-AOV7B,2DTM-AOV30A,2DTMAOV30Bt2DllfAOV3thy)2DTM-AOV3IB,2DTM-AOV101~2DTN-AOV107>2DTM-AOV142,I2DTMAOVI43)2DTM-AOV156;)TURBINEGENERATORGLANDSEAL)ANDEXHAUSTSTEAMDRAINVALVE)2DTMAOV1021MOISTURE)SEPARATORASBTOTURBIHKIDRAINVALVES'DTMMOV79h)AHD2DSM-MOV79B:COLDREHEAT)STEAMDRAINVALVES,2CRS-MW7h,2CRS-MOV7B,I(CONTINUED)HPTURBINETlTAPV92IDECREASEIMFEEDMATERI)TEtfPERATUREMILLRESULTIH))INCREASEOFCOREPOftKR)COMPENSATEDBYMODULATIONOF))COREFIAN.INCREASEDSTEAM)FLOMTOMAINCONDENSERMILLtREDUCESTEAMBYPASS)CAPABILITY.CL35.1 0

APPENDIXACONTROLSYSTEMSCOMttONSENSORLINKFAILUREAHALYSISNINEMILEPOINT2SHEET2OF2IILlHEISYSISENSORIFAILUREIHO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOVKRLEVKI.EFfECTSCOMBINEDEFFECTS35MSSi2MSS-PT103I2MSS-PTIO4I2MSS-)PTll7I(C33-NOOI)BROKEN)MINIMUMPRESSURESIGNAL(CONTINUED)PLUGGEDIINACCURATEPRESSURESIGNALI2CRS-MOVShs2CRS-MOVSBe2CRSttOV9hy2CRSMOV98~2CRS-MOVIBA,2CRS-MOVISB;CROSSAROUNDPIPIHGDRAIHIVALVES~2HRSMOVIo2tmS-MOV2;STEAMLINEDRAIN(VALVES,2tlSS-AOV85A,2MSSAOV85B)2MSSAOVSSC~)2MSS-AOV85D;AHDREHEATIHGSTEAMPIPINGDRAINVALVEi2MSS-tlOVI99.FALSElet!AIN)TlMINESTEAMFuNINPUTTORECORDER(C33-R609.IINONE)NONEHONE12-2411(45)HPTURBINETlTAPV92(CONTEND)CL35.2 Ca' III'I~II'II~',;IIi'I~III'IIIlII'~IIIIII:IIIII':I'Ir'I.:llIIII:~I'I 4g APPENDIXhCOMTROLSYSTEMSCOtutOXSENSORLIHEFAILUREANALYSISXIHEttILEPOINT2SHEETIOFIIILINEISYSISEXSORIFAILUREINO.IDIDMO.TYPEPRltthRYEFFECTSSECONDARYEFFECTSRPVLIQUIDLEVELPRESSUREORPOltKRLEVELEFFECTSCOtmINEDEFFECTS2TIUt"PSI30lIPLUGGED)INACCURATEPRESSURESIGNALREDEEMIttlMIHtRIPRESSURESIGNALIOPENSTHEFOLUNING:)NONE)TURBINESTOPVALVEABOVEISKATDRAIHVALVES,I2HSSttOV2IA)2HSS-ttOV2IB)2ttSSttOV2IC)2ttSSttOV2ID)IHAINSTEANLINEHEADERDRAINlVALVES)2ttSSAOV191~2HSSAOV194)2HSSAOV203~2ttSSAOV205,2HSS-AOV209~ICONTROLVALVEBEFORESEAT)DRAINVALVE,2ttSS-ttOVI47.I)CLOSETHEFOLLOWING:)SCAVENGINGSTEANCOXDENSERISOLATIONVALVES,l2DSR-AOV82A)2DSR-AOV828)I2DSR-AOV83h)2DSR-AOV838,I2DSR-AOV84h)2DSR-AOV84B.IIOPEttTHEFOLUNIHG:(TURBINEGENERATORGLANDSEAL)IAHDEXHAUSTSTEhttDRAINIVALVE>>2DTttAOV102)IAUXILIARYSTKhttLIHEDRAIN)VALVE2DTtt-hOVI56.I)XONE)NOHE(NONE)XONE12"2477{46)ttOISTURESEPARATORREHEATERSTEAHillNCONTROLVALVESIHSTRUttKHTAIRSUPPLYLIHECL3~I

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