ML18038A078

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Control Sys Common Sensor Line Failure Analysis Evaluation Rept for Nine Mile Point Nuclear Station Unit 2.
ML18038A078
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 07/31/1985
From: BENNETT D E
GENERAL ELECTRIC CO.
To:
Shared Package
ML18038A077 List:
References
CON-IIT07-450-91, CON-IIT7-450-91 NUREG-1455, NUDOCS 8511070124
Download: ML18038A078 (142)
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CONTROLSYSTEMSCOMMONSENSORLINEFAIIUREANALYSISEVALUATION REPORTFORNINEMILEPOINTNUCLEARSTATIONUNIT2JULY1985PREPAREDFORNIAGARAMOHAWKPOWERCOMPANY852i070i24 85ii04PDRADQCK050004i0EPDR

CONTROLSYSTEMSCOMMONSENSORLINEFAIIUREANALYSISEVALUATION REPORTFORNINEMILEPOINTNUCLEARSTATIONUNIT2JULY1985PREPAREDFORNIAGARAMOHAWKPOWERCOMPANYPREPAREDBYD.E.BENNETTGENERALELECTRlCCOMPANYNUCLEARENERGYBUSINESSOPERATIONS SANJOSE,CALIFORNIA 95125APPROVEDBY:el~~/s-)A.Koslov,Technical Leader-Regulatory Compliance Engineering NuclearServicesProductsDepartment M.A.Smith,Manager-Regulatory Compliance Engineering NuclearServicesProductsDepartment E+Fg/Md~E.C.Echert,Manager-PlantOperational Performance Engineering PlantPerformance Engineering CC..YinSafety'nProjectLicensing Engineering Xicensing Operation 12-25341

CONTROLSYSTEMSCOMMONSENSORLINEFAIIUREANALYSISEVALUATION REPORTFORNINEMILEPOINTNUCLEARSTATIONUNIT2Theinformation contained herein,supplemented bytheexistingFSARChapter15transient

analyses, documents anevaluation oftheNineMilePointNuclearStationUnit2controlsystemsinteraction duetoacommonsensorlinefailure.l.0PURPOSEThegeneralpurposeoftheCommonSensorLineFailureAnalysiswastoreviewthefailureeventsofnon-safety gradeNineMilePointNuclearStationUnit2(NMP2)controlsystemswhichutilizecommonsensorlinesorsensorsignals.Thespecificpurposeoftheanalysisandthisreport.wastosupplement theexistingNMP2FSARChapter15AccidentAnalysesandrespondtotheNRC'sNMP2FSARQuestion421.42concernspertaining tothefailureof,acommonsensorlineandsensors.

2.0CONCLUSION

Theconclusion ofthisevaluation isthatthelimitsofminimumcriticalpowerratio(MCPR),peakvesselandmainsteamline pressures, andpeakfuelcladdingtemperature fortheexpectedoperational occurrence categoryoftheidentified eventswouldnotbeexceededasaresultofacommonsensorlinefailure.Althoughtransient categoryeventshavebeenpostulated asaresultofthisstudy,theneteffectshavebeendetermined tobelessseverethanandboundedbytheeventsinChapter15.3.0ANAIYSISMETHODOLOGY Inconjuction withtheNMP-2ControlSystemsCommonPowerSourceFailureAnalysis(CPA)portionoftheoverallNMP2ControlSystemsFailureAnalysisProgram,acomprehensive approachwasdeveloped andimplemented toaddressthegeneralpurposeoftheanalysesaswellasthespecificNRCNMP2FSARQuestion421.42concerns.

Theactivitylist,Table1.1,andfollowing descriptions highlight themethodology usedtoperformtheanalysis.

Itshouldbenotedthatthisstudyusedtheevent-consequence logicoftheNMP2FSARChapter15analysis, butitstartedthelogicchainfromaspecificsource(e.g.,asinglecommonsensorlinefailure)ratherthanasystemcondition (e.g.,feedwater runout).Byapproaching thestudyinthismanner,agreatdealofconfidence canbeplacedinthestudyconclusions.

Thesoundness ofthetotalplantdesignisdemonstrated byitsbeingtolerantoftheseeffects.12-25342

-~

3.1SystemIdentification Thescopeofcontrolsystemstobeanalyzedwasestablished byfirstcompiling acompletelistoftheNineSilePointNuclearStationUnit2systemsandsubsystems.

Next,thelistwasreviewedtoconfinetheanalysistoonlythosesystemswhich,intheirnormal(automatic, ifavailable) controlmode,havethepotential toaffectreactorpressurevessel(RPV)pressure, waterlevel,orpowerlevelchanges.3.1.1AlltheHMP2plantinstrumentation andcontrolsystemswereidentified, listed,andagreeduponascompletebythetwoprincipal analyzing engineergroups,i.e.,GeneralElectricCompany(GE)andStoneandWebsterEngineering Corporation (SWEC)..3.1.2Systemandcomponent elimination criteria(seeTable1.4)were'derivedandagreeduponbytheprincipals todeletenon-electrical, non-opera-tional,ornon-control systemsorcomponents (including somepreviously analyzedsystemsandcomponents alreadyaddressed inFSARChapter15)fromthesystemsidentified in3.1.1above(seeTables1.2and1.3).Iftherewas.anyuncertainty astowhetherornotasystemmet,thecriteria, itwasretainedforfurtheranalysis.

Thosesystemsthatmetthecriteriaforelimination weresonotedinthecompletesystemlist,leavingtheremaining controlsystemstobeanalyzed.

3.2CommmonSensorLineorSensorIdentification TheCommonSensorFailuxeAnalysisportionoftheControlSystemsFailureAnalysesthenidentified strategic reactorprocesssensorlinesorsensorscommonlysharedbytwoormoreplantsystems,atleastonesystemofwhichwasanon-safety gradesystemidentified inSection3.1.2above.3.3Failure@peDetermination Basedonconservative assumptions, acompleteandinstantaneous sensorlinebreakorplugduringnormal,fullpowerreactoroperation wasdetexmined tobetheboundingfailuretypesforeachsensorlineanalyzed.

3.4Definitions ECommonInstrument Line:Alineproviding aprocesspressuresignaltotwoormoreinstrument sensors(pressure toelectrical currentinstru-ment,P/I,transmitters) whichservetwoormoreinstrument systems,ofwhichatleastonesystemisanon-safety gradecontrolsystem,e.g.,Feedwater ControlSystem(C33).CommonInstrument Sensor:Aninstrument sensorwhichprovidesinputstotwoormoreinstrument systems,ofwhichatleastonesystemisanon-safety gradesystem.12"25343

LineFailureTypes:Broken:Aninstantaneous instrument linebreak(guillotine break)thatventstoanambientpressure(nearatmospheric pressure) environment.

Plugged:Aninstantaneous instrument lineplug(complete

blockage, pinch)maintaining as-failed linepressureattheinstrument sensorandessentially inhibiting anymonitoring change,especially actualprocess,vessel,orlineparameter changes.Note:Inthecaseofdifferentialpressuresensinginstruments monitoring reactorpressurevesselwaterlevel,apluggedreference orvariablelinecouldresultin,amorecomplexresponse.

Theconservative

response, however,isstillaninhibited
response, i.e.,noactionswouldoccur.PrimaryEffects:Thedirect,instantaneous effects,ifany,onthespecifically identified sensororcomponent resulting fromthefailure.Usually,thesensedinputsignaltothesensorcomponent goestoaminimumormaximumvalueor,inthecaseofasensorlineplug,remainsrelatively constantataninaccurate (as-failed) value,insensitive toanyactualprocesschanges.Secondary Effects:Theindirecteffect,instantaneous ordelayed,ifany,onthespecifically identified sensororprominent subsequent instrument loopcomponents, i.e.,indicators, tripunits(trips,permis-sives,initiators),

controls{controllers, valves),ordevices(relaysorlights).RPVLiquidLevelPressureorPowerLevelEffects:Anyactualorpro-bablereactorpressurevesselliquidlevel,pressureorpowerlevelchangedirectlyorindirectly attributable totheidentified failureandcomponent actionsorinactions.

ICombinedEffects:Thesystematic evaluation oftheidentified linesandsensorsprimaryandsecondary effectsandtheresulting action(s),

ifany,whichwouldmostlikelyresultasadirectaccumulation ofeach,orall,sensorfailuresandRPVpressure, liquid,andpowerlevelchangeeffectsonplantperformance.

3.5Line-Group andComponent Tabulation andFailureAnalysisThesensorinstrumentation directlyconnected toandreceiving aninputsignalfromtheidentified sensinglineorsensorwereindividually identified, grouped,listed,andanalyzedtodetermine what,ifany,actionwouldresultfromtheoccurrence ofeachline/sensor failuretypedescribed inSection3.3.Theprimary,secondary, andRPVparameter changeeffects,ifany,werethenidentified,

analyzed, andtabulated.

Note:Becausesignalsfromthesecommonlinesandsensorswerefre-quentlyutilizedbycomponents previously deletedaspartof.step3.1.2above,forcompleteness, theseandquestionable, non-safety orcontrolcomponents wereretainedintheanalysisgroups.12"25344

3.6CombinedFailureEffectAnalysisThecomponents andtheirfailureeffectsidentified inSection3.5wereevaluated andreviewedforcumulative effectsbytheprincipal partiestoidentifytheprimecomponent andcombinedcomponent failureeventscenarios listedanddiscussed intheCommonSensorIineFailureAnaly-sisandEvaluation

Suassary, Table1.5,andmorecomprehensively inthe'ommonSensorLineFailureAnalysisloadsheets,AppendixA.3.7Comparison ofAnalysisResulttoFSARChapter15Theconsequences ofthepostulated failuresandtheirassociated processdisturbances.

werecomparedtotheconsequence ofthe.eventsanalysesdescribed inNMP2FSARChapter15.WheretheChapter15eventdescrip-tioncontained consequences ofthepostulated failure,theChapter15eventwasconsidered toboundthepostulated failures.

4.0 ADDITIONAL

SINGLEFAIIUREINANACCIDENTMITIGATING SAFETYSYSTEM4.1Subsequent tocompleting theCommonSensorFailureAnalysisevaluations, eachpostulated failurewasreviewedtoconservatively selectaspecificsensorlinefailurewhich,incombination withanadditional singlecomponent failureinareactoraccidentmitigating safetysystem,wouldresultina"worstcase"failureeventnotpreviously identified.

BecauseanRPVLine3break,unlikeaLine2or4break(seeTable1.5),wouldnotnormallyleadtoarelatively promptreactorscram,butlikeLines2and'interfaces withmultiplestrategic instruments andsystems,thislineincombination withtheadditional singlecomponent failuredescribed belowwaspostulated asthe"worstcase"identified failure.Concurrent withtheLine3failureeventdescribed inTable1.5,theRPVlevelsensorB22-N080B isassumedtofailupscale,inhibiting aDivi-sion2,RPSChannelBlowRPVwaterlevel3reactorscram(seeAppen-dixA).ThisRPSChannelBinhibit,togetherwithapostulated singleupscalefailureoftheRPVlevelsensorB22-N080D (onLine5),whichinhibitsaDivision4,RPSChannelDlowRPVwaterlevel3reactorscram,wouldprecludetheinitiation ofalowRPVwaterlevel3reactorscramfromoccurring asindicated inTable1.5.4.1.2WhiletheactualRPVwaterleveldecreasewouldcontinue, activating lowRPVwaterlevel4and3alarms,thenormallyexpectedlowwaterlevel4reactorrecirculation pumpsandflowrunback,beingafunctionoftheselectedfailedLine3feedwater controlRPVlevelsensorC33-N004B highlevelsignal,wouldnotoccur.Undertheseconditions, theNMP2plantemergency procedures wouldspecifically directanoperatortoinsertthereactorcontrolrodsviamanuallyinitiating acompleteRPStrip.Continued operatorinactionwouldleadtoautomatic protection whenthewaterlevelreacheslowRPVlevel2.Atthislevel,theAlternate RodInsertion (ARI)featurewillbeinitiated providing fullcontrolrodinsertion andreactorshutdown.

12-25345 4

4.2Theadditional singlefailureanalysisresultswereevaluated andcompared.

withtheFSARChapter15analyses.

Nosinglecompletely boundingfailurewasidentified.

Thepostulated doublefailure,i.e.,lin>>failureanddevicefailureoccurrence, similartootherselectedhighlyunlikelydoublefailureoccurrences, wasnotspecifically addressed inChapter15.4.3WhiletheNMP2FSARChapter15didnotdirectlyaddresstheabovedescribed postulated failureevent,theresponses toNRC'spreviousNHP2FSARQuestion42]2'IandtheRP2SafetyEvaluation (SER)Section7.2.2.7dosatisfactorily addresssimilarevents.12-25346 P

TABLEI.lCONTRO~.SYSTEMSCOMMONSENSORLINEFAILUREANALYSISACTIVITIES ANDASSIGNMENTS NO.ACTIVITYDESCRIPTION I.SystemIdentification 2.CommonSensorLineorSensorIdentification 3.FailureTypeDetermination 4.Line-Group andComponent Tabula-tionandFailureAnalysis5.CombinedFailureEffectAnalysis6.Comparison ofAnalysisResultstoFSARChapter15,andExceptions 7.Additional SiugleFailureinanAccidentMitigating SafetySystem8.MajorEventResolution andChapter15Modification (ifrequired) 9.DraftandFinalReportCompiling SECTION3.13.23.33.53.63.73.84.02.0ASSIGNMENT GEandSWECGEandSPECGEandSPECGE.GE12-2493(1)

J TABLE1.2CONTROLSYSTEMSFAIIUREANALYSESIDENTIFICATION ANDELIMINATION OFSYSTEMSFORTHECOMMONPOWERSOURCEANDCOMMONSENSORORSENSORLINEFAIIUREANALYSESNUCLEARSTEAMSUPPLY(NSS)SYSTEMSSCOPESYSTEMIDB13B22B22AB22BB22CB22HB35C12AC12BC22C33C41C51C51AC51BC51CC51DC72C88C91D13D24E12SYSTEMDESCRIPTION ReactorNuclearBoilerProcessInstrumentation JetPumpInstrumentation AutoDepressurization NuclearSteamSupplyShutoffReactorRecirculation ReactorManualControlControlRodDriveHydraulic Reduadant Reactivity ContzolFeedwater ControlStandbyLiquidContxolNeutronMonitoring StartupRangeMonitoring PowerRangeMonitoring StartupRangeDetectorDriveTzaversing IncoreProbe(TIP)Calibration ReactorProtectioa RPSMGSetControl,.Engineering TestandInformation Performance Monitoring ProcessRadiation Moaitoring SteamLineRadiatioa Monitoring PostAccidentSamplingResidualHeatRemovalELIMINATION CODE+Nl,N2N3,N4N2N6N6NoneNoneNoneN6NoneN6N3NoneN3N4N6N6N2,N5N2,N5NoneN6N2>N5+SeeTable1.4forcodecriterion explanation.

12-2045(1)

J0 SYSTEMIDSYSTEMDESCRIPTION ELIMINATION CODE+E21E22E31FllF12F13F14F15F16F17F24F41G33G36H13L12LowPressureCoreSprayHighPressureCoreSprayLeakDetection SteamTeakDetection ReactorCoreIsolation CoolingReactorFuelServiceEquipment Servicing AidsReactorVesselServiceEquipment In-Vessel ServiceEquipment Refueling Equipment StorageEquipment Under-Vessel ServiceEquipment GE/NEDEquipment (VesselComponents/Test Equipment)

StartupEquipment ReactorWaterCleanupFilter/Demineralizer (RWCU)ControlRoomPanels(Portions)

LocalInstrument Panels(Portions)

Fuel(Reactor)

CoreManagement ServicesFuelDesignServicesN6N6N6N6N6N3N2N2N2N3N2N3N3N3N5N5Allrelevantcomponents areincludedinotheridentified systemsNlNlNl*SeeTable1.4forcodecriterion explanation.

12-2045(2)T3 II TABLE1.3CONTROLSYSTEMSFAILUREANALYSESIDENTIFICATION ANDEIIMINATION OFSYSTEMSFORTHECOMMONPOWERSOURCEANDCOMMONSENSORORSENSORLINEFAILUREANALYSESBALANCEOFPLANT(BOP)SYSTEMSSCOPESYSTEMIDAAS12-9ABD10-6ABF10"2ABH13-11ABM10"1ARC5-1ASR3"10ASS3-9CCP9-1CCS9<<7CESSYSTEMDESCRIPTION Breathing AirAuxiliary BoilerBlowdownAuxiliary BoilerFeedwater andCondensate Auxiliary BoilerChemicalFeedAuxiliary BoilerSteamAnnunciator InputCondenser AirRemovalAuxiliary Steam-RadwasteAuxliarySteam-NuclearBatterySystemReactorPlantComponent CoolingWaterTurbinePlantComponent CoolingWaterElectrical Equipment

-ControlRoomElectrical Equipment

-LocalELIMINATION CODE+N4N3,N4N3,N4N3,N4N3)N4N2NoneN3,N4NoneNoneNone*SeeTable1.4Forcodecriterion explanation.

12-2190(1)T4 1

SYSTEMIDCMS33"2CNA4-4.1CND4-7CNM4-1.3CNO4-10CNS4-3CPS22-23CRS3"2CWS2-1DCS28"1DER32-9DET32-11DFD23"11DFE23-8DFM23-12DFR23-6SYSTEMDESCRIPTION Containment Atmosphere Monitoring Auxiliary Condensate Condensate Demineralizer Condensate Condensate BoosterPumptubeOilSystemCondensate Makeup/Drawoff PrimaryContainment PurgeColdReheatCirculating VaterDecontamination SystemReactorBuildingEquipment DrainsTurbineBuildingEquipment DrainsStandbyDieselGenerator BuildingFloorDrainsServiceBuildingEquipment DrainsMiscellaneous BuildingFloorDrainsReactorBuildingFloorDrainsELIMINATION CODE+N2N5N5NoneN5N5N3NoneNoneN3NSN5N5N5N5*SeeTable1.4forcodecriterion explanation.

12-2190(2)T5 tPk SYSTEMIDDPT23"7DFM23-10SYSTEMDESCRIPTION TurbineBuildingFloorDrainsRadwasteBuildingFloorDrainsELIMINATION CODE-N4,N5DRS22"22DrywellCoolingDSM32-7MoistureSeparator VentsandDrainsNoneDSR32-6MoistureSeparator ReheaterVentsandDrainsNoneDTM32"5DWS23-1TurbineBuildingMiscellaneous DrainsDomesticWaterNoneN4EGA12-4StandbyDieselGenerator AirStartupN4,N6EGF8-9EGP,EGS24-9EJS24-11.2ENS24-9ESS3-4StandbyDieselGenerator FuelStandbyDieselGenerator Protection StandbyStationServiceSubstation StandbyStationServiceSupplyBreakersEarthquake Recording

'ystemExtraction SteamN4,N6N7N7NjN2NoneEXSFOF8-10FPF15"4MainGenerator Excitation SystemDieselPirePumpFuelOilFireProtection

-FoamN5N4+SeeTable1.4forcodecriterion explanation.

12-2190(3)T6

SYSTEMIDSYSTEMDESCRIPTION ELIMINATION CODE*FPG15"5FPL15-3FireProtection

-HaloaFireProtection

-CO~FPM15-7FireDetection FPW15"1FWL7-3FWP6-4FireProtection

-WaterFDWPumpAuxiliary tubeOilFDW-PumpSealandLeakoffN4N3,N5N5FWR6-3FDWPumpRecirculation NoneFWS6-1GMC16-8GMH16-7GML16-1OGMO16-6GSN14-1GTS27-15HCS27-13HDH6-6Feedwater SystemGenerator StatorCoolingWaterGenerator HsandCOgGenerator LeadsCoolingGeaerator SealOilNitrogenSystemStandbyGasTreatment HydrogenRecombiaer HighPressureFDWHeaterDrainNoaeNoneNoneNoneN5N4,N6N6N6None*SeeTable1.4forcodecriterion explanation.

12-2190(4)T7

SYSTEMIDHDL4-2SYSTEMDESCRIPTION LowPr.ssureHNHeaterDrainHotReheatELIMINATION CODE*NoneNoneHVC22-9HVE22"2HVG22-17HVH22"16HVI22-29HVK22-12ControlBuildingA/CServiceBuildingA/CGlycolHeatingHotWaterHeatingAuxiliary BoilerRoomVentilation ControlBuildingChilledWaterN4N4N4N4HVL22-11HVN22-14HVP22-7HVR22-1HVT22-3HVW22-5HVY22"8IAS12-1IHAAuxiliary ServiceBuildingVentilation Ventilation ChilledWaterDieselGenerator BuildingVentilation ReactorBuildingVentilation TurbineBuildingVentilation RadwasteBuildingVentilation YardStructure Ventilation Instrument AirAnnunciator SystemN4N4N4N4N4N4N4NoneN2*SeeTable1.4forcodecriterion explanation.

12"2190{5)TS 4~0

~~SYSTEMIDSYSTEMDESCRIPTION ELIMINATION CODE"IHCISC27-19LMS33-1IOS16-3LWS31-1ComputerI/OTSC/CR/EOF-ERF Containment Isolation Containment LeakageMonitoring TurbineGenerator OilConditioning andStorageVibration andLoosePartsMonitoring Radioactive Liquidwaste N2N6N4N2N5MSS3-1MaterialHandlingSystemMeteorological Monitoring SystemMainsteam N3N2NoneMWS9-15MakeupWaterN5NJS24-10NormalStationService-Substation NNS24-8.424-8.6NPS24"8.2OFG31-4PBS23-3NormalStationService-4kVSupplyNormalStationService-13.8kVSupplyOffgasSanitaryDrainsN7NoneN4Radiation Monitoring SystemRemoteShutdownSystemN6,N2*SeeTable1.4forcodecriterion explanation.

12-2190(6)T9'

SYSTEMIDSAS12-2SBPRSCCSCMSFC34-2SPF24"7.1SPG24-2.1SPM24-3SPR24-5SPS24-4SPU24-1SPX24-6.1SRR23-2SRW23-4SSP21-8SSR21"2SYSTEMDESCRIPTION ServiceAirSteamBypassandPressureRegulator Off-Normal StatusIndicator Post-Accident Monitoring FuelPoolCoolingandPurification ResStaXfmrHi-SideLineProtection MainGenerator Protection MainXfmrProtection ResStaXfmrProtection NormStaXfmrProtection UnitProtection StationAuxPowerXfmrProtection RoofDrainageStormandWasteWaterPost-Accident SamplingReactorPlantSamplingELIMINATION CODE*N5NoneN2N2,N5N4,N6N7N7N7N7N7N7N4N4N2,N5N2,N5*SeeTable1.4forcodecriterion explanation.

12-2190(7)T10

~~I SYSTEMIDSST21-1SSW21"4SVH32-14SVV32-8SYSTEMDESCRIPTION TurbinePlantSamplingRadwasteBuildingSamplingHNHeaterReliefVentsandDrainsMainSteamReliefValves-VentsandDrainsEIIMINATION CODE+82,85N2,N5N3,N5N6SWP9"10SWP31-6SWT9"13SXSSYD24-12.3ServiceWaterSealWaterRadwasteTraveling ScreenWashandDisposalTransient AnalysisSynchronizing

-StandbyStationServiceN4N3,N2N7SYG24-12.1Synchronizing

-MainGenerator SYS24"12.2TMA1-4Synchronizing

-NormalStationServiceTurbineTripsN7NoneTMB16-5.2TurbineGenerator E.H.FluidSystemNoneTME16>>1TMG16-4TurbineGenerator GlandSealandExhaustTurbineGenerator TurningGearNoneN3TMITurbineGenerator Supervisory Instrument NoneTML16-2TurbineGenerator tubeOil*SeeTable1.4forcodecriterion explanation.

12-2190(8)

J SYSTEMIDTMR1"7TMS16-9VTP32-18WOS16-12WSS31-3WTA13-20WTH13-4WTS13"1YUC24-7.2YXC24-7.3YXL24-3.2SYSTEMDESCRIPTION UnitRunbackTurbineGenerator ExhaustEoodSprayTurbinePlantEquipment VentsWasteOilDisposalRadioactive SolidWasteChemicalFeed-AcidChemicalFeed-Hypochlorite WaterTreating-RawWaterSWYDSupplytoResStationService345kVMotor-Operator DiscSwitch345kVLineProtection StationGrounding

-Instruments andControlsBI,IMINATION CODE+NoneN3,N5N5N4N5N5N5N5N7N7*SeeTable1.4forcodecriterion explanation.

12-2190(9)T12

~~TABLE1.4CONTROLSYSTEMFAILUREANALYSESSYSTEMANDCOMPONENT ELIMINATION CRITERIACODEELIMINATION CRITERION+

NlNon-electrical systemsorcomponents, i.e.,solelymechanical ozsoftwaresystemsorcomponents.

Examples:'he ReactorAssembly, vessels,-.

steamturbines.

Note:'ny.associated electrical controlcomponents mightberelevantandaretobereviewed.

Examples:

vesselliquidlevel,pressureandtemperature

controls, andturbinespeedcontrols.

N2Non-control typeelectrical systemsorcomponents, i.e.,systemsorcomponents havingnodirectorindizectcontrolling orcontrolled

function, including permissive inputand~outputsignals(strictly passivesystemsandcomponents).

Examples:

theNuclearBoilerProcessInstrumentation sensors,transmitter lights,metersorrecorders, which'nlyprovidepureinformation, i.e.,measurement indications, andrecords.Note:Suchinformation, althoughpossiblyofinterestorimportance toacceptable reactoroperation andoperating personnel's manualcontrolactionsisnotconsidered relevanttoinitiating orprohibiting anyautomatic electrical contxolactionsforthepurposeofthecontrolsystemfailureanalyses.

N3Non-operational typeelectrical controlsystemsorcomponents, i.e.,systemsorcomponents notoperating orrequiredtobeoperableduringnormalreactorpoweroperations.

Examples:

theRefueling Interlock ControlSystem,thestartuprangeportionoftheNeutronMonitoring System,theturoinegenerator turninggearcontrols.

Operational electrical controlsystemsorcomponents whichhavenodirectorindirectinteraction withnormalreactoroperating controlsystemsorcomponents.

Examples:

non-safety relatedheatingandairconditioning contxolsystems,lightingcontrols.

N5Operational electrical controlsystemsorcomponents whichdodirectlyorindirectly interactwithreactoroperating controlsystemsorcomponents butwhichcaninnowayeffectchangesinthereactorvesselliquid,pressure, orpowerlevels.Examples:

theRadwasteControlSystem,sumppumplevelcontrols.

Operational electzical controlsystemsorcomponents, orportionsofsystemsorcomponents, wh'ichperformdirectplantsafetyfunctions.

Examples:

theReactorProtection System,themainsteamlineradiation monitoring portionoftheProcessRadiation Monitoring System,orthesteamleakdetection tempezature elementsandcontrolsoftheIeakDetection System.*Insomecases,morethanonecriterion mayapply.12-2044T13 r

CODEEIININATION CRITERIO&

Note:hnyrelatedres1ouseofthesesafetysystemsorcomponents toconditions oractionsbroughtaboutbynon-safety relatedcontrolsystemorcomponent

.actions, resulting directlyorindirectly froma'C'on-safety powersourceorsensorlinefailure,aretobexdentxfxe andanalyzed.

Example:areactorvessellowwaterlevelRPStripandasubsequent reactorscramresulting fromalossoffeedwater flowwhichwas,inturn,directlyorindirectly causedbyanon-safety powersourcefailure,e.g.,afeedwater pumpmotorpowerfailure.N7Electrical powersystemsorcomponents involvedindistribution, transformation, orinterruption ofelectrical power.Example:The125Vdccontrolpowerforacondensate pumpcircuitbreaker.However,controlsforthesesystems/components mightneedtobecon-sideredifthelossofsuchcontrolpowercouldleadtothefailureofothersystemsandcomponents.

  • Insomecases,morethanonecriterion mayapply.12"2D44(2)

TABLE1.5COMMONSENSORLINE:-.'AILURE ANALYSISEVALUATION SUMMARYLINE-NO.FAIIURETYPEEVENTDESCRIPTIOP BOUNDINGFSARSECBrokenPluggedNoneNdneBrokenPlugged(1)I.owreactorpressure, vessel(RPV)steamdomepressureindication (notactual)tripsreactorrecirculation pumpsAandBrunbacktotheIZMGset.Coreflowandreactorpowerdecrease.

Corevoidswellincreases RPVlevel,probablytothehighlevel8turbinetripandsubsequent reactorscram.(2)Ifthehighlevel8tripisnotreached,andifcontrolling feedwater (FM),thehighRPVlevelindication (notactual)decreases FVflowandRPVactualleveltoaneventuallowlevel3reactorscram.Inh'bited response.

Alternate channelsprovidedesiredinformation andrequiredactions,ifneeded.15.315.2.315.2.7BrokenPluggedIfcontrolling feedwater, thehighRPVlevelindication (notactual)decreases feedwater flowandRPVleveltoaneventuallowlevel3reactorscram.Inhibited response.

Alternate channelsprovidedesiredinformation andrequiredactions,ifneeded.15.2.7BrokenPluggedLowreactorsteamdomepressureindication (notactual)tripsrecirculation pumpsAandBrunbacktoIZMGset.Coreflowandreactorpowerdecrease.

Corevoidswellincreases RPVlevel,probablytohighlevel8turbinetripandsubsequent reactorscram.Inhibited response.

Alternate channelsavailable.

15.315.2.3BrokenPluggedNoneNoneBrokenPluggedLowRPVlevelindication (notactual)tripsRPSCandDlogicchannelscausingalowlevel3reactorscram.Inhibited response.

Alternate channelsavailable.

15.2.7*SeeAppendixA,CommonSensorIineLoadSheetsforcompletedescription.

12-2494(1)

LINEFAILURENO.TYPE7BrokenPluggedEVENTDESCRIPTION LowRPVlevelindicatioa (notactual)tripsRPSAandBlogicchannelscausingalowlevel3reactorscram.Inhibited response.

A1.teraate channelsavailable.

BOUNDINGFSARSEC15.2.78BrokenThruPlugged12NoneNone13BrokenPluggedRPVleveldecreases andstabilizes atloverlevelNone14BrokenPluggedHighsteamlineAflowindication (notactual)closesHSIV,reactorscrams.Inhibited response.

Alternate channelsavailable.

15.2.415BrokenPluggedRPVleveldecreases andstabilizes atlowerlevelNone16BrokenPluggedHighsteamlineBflowindication (notactual)closesMSIV,reactorscrams.Inhibited response.

Alternate channelsavailable.

15.2.417BrokenPluggedRPVleveldecreases andstabilizes atlowerlevelNone18BrokenPluggedHigh"earnlineCflovindication (notactual)closesHSIV,reactorscrams.Inhibited response.

Alternate channelsavailable.

15.2.419BrokenPluggedRPVleveldecreases andstabilizes atloverlevelNone20BrokenPluggedHighsteamlineDflowindication (notactual)closesHSIV,reactorscrams.Inhibited response.

Alternate channelsavailable.

15.2.421BrokenPluggedLowfeedwater flowindication (notactual)runsbackrecirculatioa pumpsAaadBtoLZMGset.Coreflovandreactorpowerdecrease.

CorevoidswellaadZWflowincrease.

RPVleveliacreases, probablytoahighlevel8turbinetripandsubsequent reactorscram.Inhibited response.

Alternate channelsavailable.

15.315.2.3+SeeAppendixA,CommonSensorLineI.oadSheetsforcompletedescription.

12-2494(2)

LINENO.FAILURETYPEBrokenPluggedEVENTDESCRIPTION+

Highfeedwater flowindication (notactual).Ifcontrolling feedwater, FVflowandRPVl~veldecreasetoaneventuallowlevel3reactorscramInhibited response.

Alternate channelsavailable.

BOUNDINGFSARSEC15.2.723BrokenPluggedLowfeedwater flowindication (notactual),runsbackrecirculation pumpsAandBtoLE2!Gset.Coreflowandreactorpowerdecrease.

CorevoidswellandZVflowincrease.

RPVlevelincreases, probablytoahighlevel8turbinetripandsubsequent reactorscram.Inhibited response.

Alternate channelsavailable.

15.315.2.324BrokenPluggedHighfeedwater flowindication (notactual).Ifcontrolling feedwater, PWflowandRPVleveldecreasetoaneventuallowlevel3reactorscram.Inhibited response.

Alternate channelsavailable.

15.2.7BrokenPluggedSlightdecreaseinRPVlevelandpowerNone2762829Thru36BrokenPluggedBrokenPluggedSlightpowerlevelfluctuation NoneNoneNone+SeeAppendixA,CommonSensorLineLoadSheetsforcompletedescription.

12"2494(3)T17

APPENDIXhCONTROLSYSTEMSCOtSOHSENSORLIHEFAILUREANALYSISNINENILEPOINT2SHEET1Oi1IILIMEISYSISENORIFAILUREMO.IDIDNO.Ib22M027IPRIHARYEFFECTSlQEIHWDIFFERENTIAL C33IIMACCllRATE DPSIGNALIPRESSURE(DP)SIGHALIIPLUGGEDIINACCURATE DIFFERENTIAL IIPRESSURE(DP)SIGXALIIXOITIRROEEXIHAXIHNIDIFFERENTIAL IIPRESSURE(DP)SIGNALIIPLUGGEDSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORONERLEVELEFFECTSILI-R60SHIGHLEVELIMDICATIOHI HoNEI(IHD)IILI-R605INACCURATE SHQFDONHINONEILEVELIHDIIIILI-R608HIGHLEVELIMOMEIH.')ICATION(IHD)II*IILl-R60$INACCURATE MIDEIHOMEIRAICELEVELIHDIMOXEIIIMONEIIIXONECOMBINEDEFFECTSREACTORPRESSUREVESSEL(RPV)HBTOPHEADTAP{LEVELREFERENCE IEG)CL1~1 0

APPENDIXhCONTROLSYSTKNSCOtSONSENSORLINEFAILUREANALYSISNINEMllEPOINT2SHEETIOF3I)LINE)SYSIDB22IE22IPLUGGED)INACCURATN DPSIGNALX073RBROKENHAKIMl5DPSIGNALPLUGGEDjINACCURATE DPSIGHALM07$C)BROXEXHIMIHSIPRESSURESIGNAL)PLUGGEDINACCURATE PRESSURESIGNALX080C)BROKEN)MAXIHUHDlffKRENTIAL

)PRESSURESIGNALIPLUGGEDlINACCURATE DIFFElmllTIAL

)PRESSURESIGNALSENSOR)FAILUREIIDNO.TYPEPRIMARYEFFECTSX073LBROKENIMAXIMUMDPSIGNALSECOHDARY EFfECTS)LIS-N673L IHDHIGHLEVEL.DIV3~I/2HPCSUNLEVEL2)INITIATlON INHIBITED.

)LS-H674LHIGHLEVEL8HPCSI/2SHUTDOWN.

I)LIS-X673L, IHDINACCURATE.

)DIV3,I/2HPCSUNLEVEL2)IHITIATlOHINHIBITED.

)N674LHIGHLEVEL8HPCSI/2)SHUIDOQIINHIBITED.

I)LIS-M673R INDHIGHLEVEL,IDIV3,I/2HPCSIlNLEVEL2)IHITIATION IHHIBITED.

lLS-H674RHIGHLEVEL8HPCSI/2SCRAMTRIP.I)LIS-N673R INDINACCURATE.

)DIV3,I/2HPCSLEVEL2IHlTIATIOHIHHIBITKO.)LS-H674LEVEL8HPCSI/2)SCRAHTRIPINHIBITED.

I(PIS-H678C IHDUNPRESSURE.

IDIV3eRPS(C)I/2HIGH)PRESSURESCRAHANDPS-H679C,

)DIV3,HS4(C)I/2RHRISOLATION INHIBITED.

I(PISN678CIHDINACCURATE.

IDIV3oRPS(C)I/2HIGH)PRESSURESCRAHINHIBITED.

(MS4(C)RHRISOLATIOH.

I)LIS-H680C INDHIGHLEVEL.)DIV3,I/2RPS(C)LOVILEVEL3SCRAMTRIPIINHIBITED.

IILIS-H680C IHDINACCURATE.

IDIV3sI/2RPS(C),LEVEL3ISCRAHTRIPINHIBITED.

RPVLIQUIDLEVELPRESSUREORPOVKRLEVELEFFECTSMONE)MOMEiHONEItHONE)NONE)HONEiNOMEIIXONE'HOMEINONE)MONEIHOHECOtSIREDKFFECTSRPVHI4-3404TAP(LEVELREFEREHCE LKG)CL2.I

~~h APPENDIXhCONTROLSYSTEHSCOHHOMSENSORLIHEFAILUREANALYSISNINENILEPOINT2SHEET2OF3LINEISYSMO.IDSENSOR)FAILURE)IDMO.TYPEPRIHARYEfFECTSSECONDARY EFfECTSRPVLIQUIDLEVELPRESSUREORBNERLEVELEFFECTSCOHBIHEDEFFECTS2Ib22IMOSICIBROKENHAXIHUHD1iiEREMTIAL PRESSURESIGNALIPLUGGEDIC33)M004AIBROKENIINACCURATE DIFFERENTIAL

)PRESSURESIGNALIIIMAXIHUHDIFFERENTIAL

)PRESSURESIGNALPLUGGEDIINACCURATE DIFFEREIITIAL IPRESSURESIGNALlC33IM005BROKEN)HINIHUHRPVPRESSUREAND)HIHIHUHRPVDIFFERENTIAL ITEMPERATURE (DT)SIGNALSIPLUGGEDIINACCURATE RPVIRESSUREANDIDTSIGNALSIILIS-N68IC INDHIGHLEVEL.)DIV3,I/2LEVEL2AND)LS-N684D, I/2LEVELI,HS4tISOLATION INHIBITED.

IfLIS-N681C IHDINACCURATE.

DIV3yI/2NS4LEVEL-ly2AMDIBOPISOLATIOMS INHIBITED.

IILl-R606AINDHIGHLEVEL.LS-K624ALEVEL8,I/3(TURBINEANDFEEINATER (W)(PUHPS(3)SHUTDONNTRIP.)IFSELECTED, LI-R608IND)HIGHLEVEL,LS-K626h/8 llW)LEVELRECIRCPUHPh/8)RUNBACKINHIBITED.

}IFCONTROLLIMG, FHFUNlllLL)DECREASE)Ll-R606AIHDIHACCURATE.

K624ALEVEL8~I/3TURBIHEIANDFHPUHPSTRIPINHIBITED.

)IFSELECTED, R608IHDIINACCURATE>

K626A/8RECIRCPUMPh/8RUNBACKIHHIBITED.

IFCONTROLLING:

fVfIlNICONTROLIHACCURATE IIPl-R605INDLNRPVPRES-ISURE.833-K6618, K6658,)K6688RPVTUERHALSHOCKIHTERLOCKS RECIRCPUHPSh)AND8HIGHRPVDTSTARTIPERHISSIVE INHIBITED.

I)Pl-R605INACCllRATE.

RPVDTITHERHALSHOCKIHIERMCKS IHHISITED.IMONEIII)HOMEIRPVLEVELDECREASES.

LOHILEVEL3SCRAHPROBABLE.

I)NONENONEHOME)MONE)MONE)RPVLOQLEVEL3REACTORISCRhll.IlNOMEMOME12-24VS(3)RPVN14340TAP(CONT'D)CL2.2

APPENDIXhCONTROLSYSTEMSCOHHOHSENSORLIMEFAILUREANALYSISNINENILEPOINT2SHEET3OF3LINEISYSISENSORIDNO.MO.IDFAILURETYPEPRIMARYEFfECtSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSCOHBINEDEFFECTS2IC33MOOEAIBROEENMINIMUMPRESSURESIGHALINZImNRPVDTSIGNALIPLUGGEDIINACCURATE PRESSURESIGNALLTI15IBmmENIIIIHINNDPSIGNALIIIPLUGGEDIINACCURATE DPSIGNALIPI-R609IHDMMSTEAMDONEIPRESSURE~RECIRCPUMPSA&BICAVITATION INTERLOCX RUNBACKITOLlIIGSET.IIPl-R609INDIHACCURATE.

IRECIRCPIRIPSh&BCAVITATIOH IRUNL<CKTOIFNGSETIIHHll:ITED.

IILI-IlSINDLOMLEVEL.IILI-115INDIMACCURATK.

INONEIINONEIMONEIIMONEIREACTORPOWERDECREASES.

IRPVHIGHLEVEL8TURBINEIRPVLEVELIHCREASES.

ITRIPAMDREACTORSCRAM.IPROBABLEHIGHLEVELbTRIP/ISCRAH.IIMONEIMOME12-2477(4)RPVH14340oTAP(CONTEND)

CL2.3

APPENDIXhCONTROLSYSTEttSNtONSENSORLINEFAILUREANALYSISHIREttILEPOlltT2SHEETIOF3LINEISYSISENSORNO.IDIDNO.FAILUREITYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSCOttBIHED EFFECTS3IB22IX044BBRtNEXIINEIHtblDPSIGNALIPLUGGEDIXACCURATE DPSIGNALPLUGGEDINACCURATE DPSIGNALIB22IXOIBBIBROEEXIHIMIHNIPRESSURESIGNALIB22IM062BINNNEHIHIMIHtbIPRESSURESIGNALILR-R615IMDHIGHLEVELIMIXONEIFUELlADE.IILR-R615IXDIXACCURATE.

IMOMEIIPR-R623BIHDLOWPRESSePOSTIHONEIACCIDENTttOXITOR.

IIIIPR-R623BINDIXACCtmhTE.

INONEIIIPIS-N678B INDLOWPRESS.IMONEIXONEIIIXONEIINQEIMONEE12IIPLUGGED1MACCURATE PRESSURESIGNALX058BIBROKNIttlNIÃltDPSIGNALIDIV2,RPS(8)I/2HIGHIPRESSSCRAHANDPS-H679BIDIV2,HS4(D)I/2RHRIISOLATION INHIBITED.

IIPIS-N6188 INDIHACCURATE IMONEIDIV2,RPS(8)I/2HIGHIPRESSSCRAHINHIBITED.

MS4(B)RHRISOLATION.

IIdPIS-N658B INDttINDP.RHRINONEIINJVALVEF042BOPENINGIPERttlSSIVE.

IMOXEIPLUGGEDIIXACCURATE DPSIGNALE12IXOSSCIBROKQIIHIXIHtblDPSIGXALIPLUGGEDIIMACCIIRATE DPSIGXALIRSSLT112IRSSIPT113IBROEEXIIPLUGGEDIIBROEEMIIPLUGGEDIIHAXltmHDPSIGNALIIIMACClUULTE SIQthLIIIIINIHtbt PRESSURESIGNALIIINACCURATE PRESSURESIGNALIdPIS-N6588 INDINACCURATE.

IMONERHRINJVALVEF0428OPENINGIINHIBITED.

IIdPISN658CINDHINDPRHRINOXEIIHJVALVEF042COPEHIKGIPERHISSIVE.

IIdPIS-M658C INDINACCURATE.

INOHEIRHRIHJVALVEF042COPENINGIIXHIBITED.

IILlll2IXDHIGHLEVELIILl-112INDINACCURATE IIPl-113IMDLOMLEVELIIPl-113IHDINACCURATE IINONEIIMONEIIXONEIINOIEIRPVNl42004TAP(LEVELREFERENCE LEG)IMONEINONEIXOIEIXONEIIMONEIIMONEIIXOXEICL3.1

APPENDIXACONTROLSYSTKHSCOHHOHSEHSORLIHEFAILUREAHALYSISMIHENILEPOINT2SHEET2OF3)LINEISYS)BEMSORIFAILUREIXO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOHKRLEVELEFFECTSCOHBIHKDEFFECTSIB22IMoaoalBROKENIHAEIIaaDPSIGNALIPLUGGEDIINACCURATE DPSIGXALIIIlE22IMOBIBIBROKENIIQXuSRIDPSIGNALIPLUGGEDlINACCURATE DPSIGNALIII$22IX091BiBROKENIIQXINNDPSIGXAL)LISX680AIHDHIGHLEVEL.IDIV2>>I/2RPS(B)QN)LEVEL3SCRAMINHIBITED.

)LISN680BINDINACCURATE.

IOTHKRHISE>>

SA!KASBROKEN.IILIS-M68)B IHDHIGHLEVEL.IDIV2>>1/2NS4LOULEVEL2(ANDLS-H684B>>

I/2NS4UN(LEVILIISOLATIOHS IINHIBITED.

IILIS-H681B INDIHACCIJRATK.

(MONE)HOWE1I(NOME)MONEIOTHERW]SE>>

SANEASBROKEN.)II)LIS-H691B/F IHDHIGHLEVEL.INONE1MOXEiMOMEIINONEINONEIl(MOHEIM09lfPLUGGED(INACCURATE DPSIGNALIDIV2,I/2ADS(h)RHR(h)~ILEVELIAHDLS"H692B/F I/2)RCICLEVEL2IHITIATIOH IINHIBITED.

LS-H693B/F (DIV2,I/2RCICLEVEL8ISHUIIuW.I)LIS-H691B/F IHDIHACCURATE.

iHONE(XONE3B22M095BIBROKEN)HAXIIRRIDPSIGHALIPLUGGEDiINACCURATE DPSIGNALPLUGGEDIINACCURATE DPSIGHALB22IN402BIBROKENIIQXIlftRI DPSIGNAL(X402FIH693B/FDIV2,I/2RCIC)LEVEL8SHUTIXNHIHHIBITED>>

IOTHERWISE, SANEASBROXKH.I)LIS-X695B IHDHIGHLEVEL.)MOXEIDIV2>>I/2ADSDNLEVEL3ITRIPPKRHISSIVE INHIBITED.

I)I.IS-H6958 IMDIHACCURATE.

)XONE)OTHKRHISE>>

SANEASBROKEN)LINE.tJATlISIHDHIGHLEVEL.DIV2,iMONEI/2RRCSLEVEL2ARI,SLCSIHITIATIOH AHDRKCIRCPUMP(AMDRVCUSHUnOWINHIBITED.

I)ATlSIHDIHACCURATK, OTHERtHOWE)MISE>>SANEASBROKEN.lRPVN14-200~TAP(CONT'D)-)XOXE)XONE)NOMEINOXECL3.2

APPENDIXhCONTROLSYSTEMSCOt0tONSEXSORLIMEFAILUREANALYSISNIHEMILEPOINT2SHEET3OF3I)LINEISYS)SEXSOR)FAILUREIMO.IDIDMO.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPtNERLEVELEFfECTSCOMBINEDEFFECTS3IB22lM403bIBROKENIMIMIMWPRIURESIGNALIATMSINDONPRESSUREDIV2gINONEI/2RRCSHIGHPRESSRECIRCPUMP,RitCUTRIPARDARI,SLCSIMITIATIOM IXHIBITFD.

IMOMEPlRGKDIB22)R004BBROKENtPLUGGEDIB22ROOSBIBROKENPLUGGEDB35IM040IBROKENC33)X004BBROKENiINACCURATE PRESSURESIGNALIIIMIMIMlktPRESSURESIGNALI)INACCURATE PRESSURESIGNALMAKIMWDPSIGNAL)INACCURATE DPSIGNALIIMINIMUMPRESSUREAHDMAKIMW)RPVDIFFERENTIAL TEMPERATURE (DT)SIGNALSINACCllRATE PRESSUREAXDRPV)DlFFEREtlTIAL TEMPERATURE ISIGNALSIIMAKIMWDPSIGNALiLl-R606BIHDHIGHLEVEL.1LS-K6248HIGHLEVEL8,I/3ITURBlHEAHDFHPUMPSTRIP.IFSELECTED'I R608IHDIHIGHLEVEL,LS-K626A/B ONiNONEATMSINDIHACCURATEs OTHERtNONE)MISESAMEASBROKEN.III(Pltt004BINDMIMIMWPRESSIMOREII)PI-2004BINDINACCURATE INOMEIIIDPIR009INDHIGHLEVEL)NOXEIIIDPI,R009INDINACCURATE INOHEIIIK667hAXD668hONRPVPRESStNONE)TtlERMALSHOCKINTERLOCKS AND)IRECIRCPUMPShANDBHIGHIRPVDTSTARTPERMISSIVE IINHIBITED.

I(SAMEASBROKEN.)MONEIMONElI)HONEI)HOMEIINOMEIIMOMEI)XONE)NOMEINACCURATE DPSIGNALILEVELTRIPAHDRECIRCPUMPlRUNBACKTOLFMGSETi-INHIBITED.

IIFCOHTROLLIMGs FMFON(REDUCED.I)R606BIHDlltACCURATE.

K624BILEVELBoI/3TURBINEAHDFHiPUMPSTRIPINHIBITED.

IF)SELECTED, LI-R608IHDIHACCURATE, LS-K626h/B FM/IRECIRCPUMPTRIP/RUHBACK IIlAlIBITED IFCOHTROLLIHGe

)INACCURATE LEVELCONTROL.RPVM142004TAP(CONT'D)iRPVLEVELDECREASES.

EVER-)RPVLOQLEVEL3REACTORITUALLEVEL3SCRAMPROBABLE.

tSCRAM.II]MOMEIHONECL3.3 II APPENDIXhCONTROLSYSTEttSCOttttONSEHSORLIHEFAILUREANALYSISHIHENILEPOINT2SHEETIOF2I)LINE)SYS)SENSOR)FAILURE)MO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOQKRLEVELEFFECTSCOtSIMEDEFFECTSIPLUGGEDI1NACCURATE DPSIGNLNO78A)BROKEN)HIMIHUttPRESSURESIGNALlPLUGGEDIINCCURATE PRIIIESIGNAL)RSS)LT116)BROXKN)PLUGGEDI)B22)NOBDA)BROKEN)tthElttUtl DPSIGNALINACCURATE DPSIGNLtthXINRtDPSIGNAL)PLUGGEDINCCllRATE DPSIGNALIB22NORIABROKEN)HAKItttNDPSIGNAL4)B22)HO73C)BROKEN)HAIIHUtiDPSIGNAL)llO730)LISN673C/GHIGHLEVELIHDlHONE)DIV3eLEVEL2oI/2HPCSIIHITIATIOH IHHIBITEOI

)LSH674C/GDIV3yLEVEL8~)1/2HPCSSHUIDOQITRIP.I)N673C/GIHDINACCURATE.

1/2)MONE)LEVEL2HPCSINITIATION AHDI/2LEVEL8HPCSSRUTI'IttHIBITED.I)PIS-M67SA IMDLOttPRESSURE.

)HONEIDIVIIRPS(A)I/2HIGH)PRESSSCRAMANDPS-H679A,

)DIVIHS4(A)1/2TRIP(RHRI/2ISOLATIOH TRIP))INHIBITED.

IlN678AIHDINACCURATE.

DIVIHONEI~RPS(h)I/2SCRAttANDttS4(A)RHRISOLATION IHHIBITED.

IILI-116IMDHIGHLEVEL.NOHE))Ll-116IltDINACCURATE.

)NOHEII)LIS-H6SOA INDHIGHLEVELINOHEIDIVlo1/2RPS(h)LEVEL3)SCRAMIHHIBITKD.

I)N6&OAIHDINACCURATK, OTHER)liONE)MISE,ShtfEASBROXEN.IIIILISM681AINDHIGHLEVEL.IMOMENONE)NOHE)NOHE)NONE)NOMEI)MOHKI)MOHE)MOMEII)NONEPLUGGED)IHACCURATE DPSIGNAL)DIV1,1/2HS4LEVEL2AHD)LS>>H684hDIV1~1/2HS4)LEVELIISOLATIOltS

)INHIBITED.

IIN68lhIMDINACCURATE, OTHER-)WISE~ShtjKASBROXEH.HONE)NONERPVH14160oTAP(LEVELREFERENCE LKG)Cl.4.I

APPEHDIXAICONTROLSYSTEMSCOHHONSENSORLINEFAILUREANALYSISMINENILEPOINT2SHEET2OP2IILINEISTSISENSORIFAILURE)ininNO.TYPEMO.PRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORONERLEVELEFFECTSCOlBINEDEFFECTSC33M004CBROKENHAKISBIDPSIGNALIPLUGGEDIINACCURATE DPSIGNALC33INODBCIBROKENNININQIPRESSURESIGNALfMAXIMUMRPVDTSIGNALPLUGGEDIINACCURATE PRESSURESIGNAL)LI-R606CINDHIGHLEVEL.)LS-K624CI/3HIGHLEVEIBITURBINEAMDBtPUlPTRIPS.I)R6O6CINDINACCURATE.

)LS-X624CI/3HIGHLEVELB)TURBINEAHDFHPlÃPTRIPS)INHIBITED.

I)K716BRUNSBACKASBRECIRCIPUMPSAHDFLANVlhRECIRCICAVITATIOH INTERLOCKS.

II)K116BRECIRCCAVITATIOX IPREVEHTIOH INTERLOCKS IINHIBITED.

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.TYPEPRIHARYEFFECTSSECONDARY EFFECTSRPVLIQUIDIEVELPRESSUREORPOVERLEVELEFFECTSCOHBIXEDEFFECTSIB22IIPLUGGEDIIIM403AIBROEEMINACCURATE DPSIGNALHIMIHNIPREBBURESIMlLPLUGGEDIINACCURATE PRESSURESIGNALSIB22IN402AIBROKENIHAXIHNIDPSIGNALII,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.FAILURETYPEPRltthRYEFFECTSSECONDARY EFfECTSRPVLIQUIDLEVELPRESSUREORPOttERIEVELEFFECTSCOtiBIMKD EFFECTS6)l22ROOSIBROKEN)ttAIItRBI DPSIGNALIIIIIPLUGGEDIIXACCURATE DPSIGNALIIRSSILT11$IBROKENttIHIHWDPSIGNALIIPLUGGEDIINACCURATE DPSIGNALIIIB22IM080CIBROKENIttIMltSBI DPSIGNALIPLUGGEDINACCURATE DPSIGNALIB22XOBODIBROKENttlMltfWDPSIGNALIPLUGGEDIXACCURATE DPSIGNAL)B22(M095A)BROKENHIHIHUttDPSIGNALPLUGGEDIINACCURATE DPSIGNALIDPI-R005IXDHIGHLEVEL,IFUELAREAIIR005INDINACCURATE IILI-ll5IXDuNLEVELLI-115IMDINACCURATE

)LIS"N680C IMDllNLEVEL.)DIV3,LEVEL3RPC(C)1/2)SCRhtt.}NONEII)HONEI(MONEIIMONEIIMONEX680CINDINACCURATE.

DIV)XONE3LEVEL3RPS(C)1/2SCRhttIIINHIBITED; IIILIS-M680D INDUNLEVEL.)NOMEIDlV4,LEVEL3,RPS(D)1/2)SCRAN.I)H680DIHDINACCURATE.

DIVfXOHEIhiLEVEL3eRPS(D)I/2fSCRhttINHIBITED.

I)LIS-H695A IHDIANLEVEL.)NONEIDIVI,1/2ADS(A)UNILEVEL3IMITIATIOH-I)X695hIHDINACCURATE.

DIVfNONE1,LEVEL3~1/2ADS(h)IHITIATIOH INHIBITED.

)HOXEII(NOMEI)NONE)RPVLOMLEVEL3REACTORISCRAMlmEXCOtSINEDVITtt)B22-M080D 1/2SCRAMBEUN.IIMONE)RPVLOMLEVEL3REACTORSCRAMVHBICOtSIMEDttITHIB22-X080C I/2SCRAtlABOVE.I(NOtm)XONE)MONERPVH13104TAP(LEVELVARIABLELKG)CL6.1

APPENDIXhCONTROLSYSTBSCOtSONSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEET2OF2I)I,IXE)SYSSENSOR(FAILUREMO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSCONBINEDEDICTS6C33)M004ABROKENPLUGGED)MIMISWDPSIGNALINACCURATE DPSIGNALiLI-R606hINDlANLEVEL.)LS-K624ALEVELS,1/3)TURBIHEANDFWPUMPTRIPSIIHHIBITEO.

)IFSELECTED, LS-K626h/b LOWILEVELTRIPRUNSBACKBOTHIRECIRCPUHPSTOLFHGSET.)IFCQITROLLIXG, FVFuW)INCREASES.

I)R606)HDIXACCURATE.

)LS-K6?4hANDIFSELECTED, ILS-K626A/B TRIPINHIBITED.

)IFCOHTROLLIHG, LEVELICONTROLINACCURATE.

)MONE(REACTORPOWERDECREASES.

IRPVLEVELINCREASES,

)PROBABLEHIGHLEVELSITURBIXETRIP,REACTORSCiUuI.IIINONEIMONEIRPVHIGHLEVELSTURBINEITRIPAMDREACTORSCRANPRE-ICLUDEDBYRPVIlNLEVEL3)REACTORSCRAHFltONB22-MOSOC

)AHDXOSODABOVE.I)NOME12-2411(14)RPVN1310TAP(CONT'D)CL6.2

APPENDIXhCONTROLSYSTEMSCOMMONSENSORLIHEFAILUREANALYSISNINEMlLEPOINT2SHEETIOF2LIXEXO.SYSISENSORIDHO.FAILNEITYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFfECTSCOMBINEDEFFECTSIIR22IRSSB22IM027BROEENIMINIMNIDPSIGNALIPLUGGEDIINACCURATE DPSIGNALIBROEEMIMINIMISDPSIGXAIIPLUGGEDIWLCCURATE DPSIGNALXOSOBIREDEEMIMIMIMNIDPSIGXALIPLUGGEDINACCURATE DPSIGNALX095BIBROEEMIMIMIMNDPSIGNALPLUGGEDIINACCURATE DPSIGNALLT116IBROIEMIMIMIIGBIDPSIGNALIIIPLUGGEDIINACCURATE DPSIGNALILI-R605IMDLOMLEVELINOMEIIIR605IMDINACCURATE INOHEIIILIS-N6SOA IHDLOULEVEL.IMOMEIDIVleRPS(h)LEVEI3,l/2ISCRAMTRIPS.IILIS-H680A INDINACCURATE.

IXONEIDIVI,RPS(A)LEVEL3SCRAMIITRIPINHIBITED.

IILIS-H6SOS IHDLStLEVELINOXEDIV2~RPS(B)LEVEL3~I/2ISCRAMTRIPS.IIH6SOBIHDIHACCURATE.

DIVIMOREI2oRPS(B)LEVEL3eI/2ISCRAMTRIPINHIBITED.

IILI-116IHDUWLEVELIILI-116INDIMACCURATE IILISH695BIHDU%LEVEL.IDIV2,I/2LEVEL3AOS(B)IINITIATIOM.

IIH695BIHD1HACCURATE.

DIVIHONEI2oI/2LEVEL3ADS(B)IXIITIATIONIHHISITED.IHOMEIIXONEIIRPVLOMLEVEL3REACTORISCRAM%HEMCOMBINEDNITSIB22-HOSOB I/2SCRAMBEUN.IIXONEIRPVLOMLEVEL3REACTORISCRAMMHENCOMBIHEDNITHIB22-HOSOA I/2SCRAMABOVE.IINOMEINONEIINONEIIHONEIHOMERPVMl3,1904TAP(LEVELVARIABLELEG)CL7,1

APPENDIXhCONTROLSYSTEHSCOHHOHSENSORLINEFAILUREANALYSISHIREMlLEPOIHT2SHEET2OF2IILIXKISYSISENSORIFAILUREXO.IDIDNO.TYPE7IC33IM0048BROKENPRIHARYEFFECTSHINIHtNDPSIGNALPLUGGEDIIXACCURATE DPSIGNALIC33IN017IIIPLUGCKDIINACCURATE DPSIGNALIIBROKENIHINIHUHDPSIGXALIPLUGGKDIINACCURATE DPSIGNALC33IN004CBROKENIHINIHUHDPSIGNALSECOXDARY EFFECTSILI-R606BIHDQNLEVEL.IlS-K6248o I/3HIGHLEVELITIIRBINEAHDBtPUHPTRIPSIINHIBITED.

IFSELECTED, LT-K626h/8 flNILI:VELTRIP.BOTHRECIRCPUMPSRUHBACKTOLFHGSET.lfCOHTROLLIHG, FVFLOPIIUrmaSES.

IIR6068INDINACCURATE.

K6248I/3HIGHLEVELTURBINEANDIFMPUMPTRIPINHIBITED.

IFSELECTED, K626A/8UNILEVELTRIPANDRECIRCIRUNBACKIHHIBITED.

IFCOHTROLLIHG, IHACCURATE LEVELCONTROL,IILI-R606CINDLOMLEVEL.ILS-K624Co I/3MICHLEVEL8ITURSIHEAHDRlPUHPTRIPSIIHHISITED.IIR606CIHDINACCURATE>

OTHER-IMISE,SAHEASBROKEN.IILR-R60$IHDUNLEVELIIR608IHDINACCURATE RPVLIQUIDLEVELPRESSUREORBNERLEVELEFFECTSIMOHEIREACTORPOVERDECREASES AXDILEVELINCREASES.

PROBABLEIRPVHIGHLEVEL8REACTORISCRAH.IIIMONEIHONEIIHONE~IIIHONEIIHONECOHSIMEOEfFECTSINOXEIRPVHICHLEVEI8SCRAHPRE-ICLUDEDBYRPVLONLEVEL3ISCRAHFROH822-MOSOA ANDBITRIPSABOVE.IIIMOMEIMOMEIMOXEIIIHONEIINONERPVN13190TAP(CONT'D)CL7.2

APPENDIXhCOHIROLSYSTEMSCOHHOHSEHSORLIHEFAILUREAHALYSISHIHENILEPOINT2SHEETIOFILIME(SYS(SENSORIDIDNO.B22IX013LFAILURE(PRIMARYEFFECTSHIMNWDPSIGNALPLUGGED(INACCURATE DPSIGNALB22X013RIBROKENHIXIHWDPSIGNALB22(M081CIPLUGGEDIINACCURATE DPSIGNALIIIIBNNEXIHIXIHlwDPSIGXALIPLUGGEDIINACCURATE DPSIGNALSECONDARY EFFECTS(LIS-N673L IXDUNLEVEL.IDlV3,I/2LOMLEVEL2HPCS(IHITIATIOH.

LS-H674LHIGHLEVEL8HPCSSIIUIIXNM (INHIBITED.

I(N673LIHDIHACCURATE.

DIVI3,I/2MMLEVEL2HPCSIMITIATIOH IHHIBITED, OIHER-IMISE,SAMEASBROIEM.I(LIS-N673R IXDLOMLEVEL.IDIV3,I/2LOMLEVEL2HPCS(INITIATION.

LS-M674R, I/2ILEVEL8HPCSTRIPINHIBITED.

IIM613RIHDINACCURATE.

DIVI3,I/2LEVEL2HPCSIHITIA-ITIOHIHHIBITEDo OTHERMISEs (SANEASBROKEN.I(LIS-N681C IXDONLEVEL.IDIV3,I/2LEVEL2NS4AND(LS-N684C, I/2LEVELIHS4IISOLATIOHS.

I/2STANDBYGAS(TREATMENT IHITIATIOH.

I(N681CIHDINACCURATE.

DIVI3~I/2LEVELIAND2oHS4IISODLTIOH TRIPMllBlTED.

RPVLlllUIDLEVELPRESSUREORPOMERLEVELEFFECTSNONE(MONE(NONE(MONE(NOMEIIIII(MONEIMOXEINONE~(XONEXONERPVH123404TAP(LEVELVARIABLELEG)CLS.I

~~

)lI'II~I'IIII'IIIII:I11':HIIII;IIII'I~II'~IIIIlI'III'l C~

(II,'slII~IIII.IIII!!I'!I'.II!'II'IIIII'!.'II~I,IIIIIIII't!:IIIII.II'II:IIIIII'.:IIIIII~IIIIII

I'IIII'IIII'I'IIIII~I~I~I':h'tt':IIII'I'tt'iIII:I~I~IittIIII;IIItt'II'III:III.I'~'I':hIIII':I':htt'II'IIIII'~tl:II':hI'.II'I4.ttIII'IIItr.II':IIIIIII

APPhCONTROLSYSTEHSCOtSONSENSORLINEFhlLUREANALYSISNINEMILEPOINT2SHEET1OiILINElSYSISENSORXO.IDIDMO.12IR228032ihlLURETYPERROEEXIPLUGGED)PRItthRYEFFECTS8AIMkIDPSIGNALINACCURATE DPSIGNALIC12MOOSIC12lIIIE22E011IPLUGCEDIIN057RROKEXI)PLUGGED)INACCURATE DPSIQULL8AEIHNIDPBIGNALINACCURATE DPBIQULLNNNEX8AXIHNIDPSIGNALPLUOGEDlINACCURATE DPSIQULLRROEEM8AEINWDPSICXAL)DPI-R009y R6028108DPIIR009eR602IMACCURATE IlDPIR005~R60381GHDPI)R005,R602INACCURATE II8657IND,HIGHDP8657IXDMLCCURATE

)NONEl)MONEINONEI)NONEI)NONEIIMONERPVLlqUIDLEVELPRESSUREORPOMKRLEVELEFFECTSSECONDARY EFFECTSIDPI-R613IXDHIGHDPIFMMINONEDPI-R613INDIXACCURATE XONE)NOMEIIMONEIIMOXEI)NONEIIMOXEIfXOXEI)NOXEI(XONE12-2477(21)RPVNllBOTTO8HEADTAP(LEVELVARIABLELEG)CL12.1 4

APPENDIXACONTROLSYSTEMSCOtSOHSENSORLINEiAILUREANALYSISNINENILEPOINT2SHEET1OiIIILINEISYSISENSORIihlLUREIIDMO.TYPENO.IDPRIMARYEFFECTSSECONDARY EFFECTSRPVLlljUIDLEVELPRESSUREORPOVERLEVELEFFECTSCOHBIREDEFFECTS13IC33K31IPLUGGEDIINACCURATE DPSIGNALMO86CX086DBROKENMNIIGBlDPSIGNALIPLUGGEDIIIIINACCURATE DPSIGNALX003lBROKENNINIIGWDPSIGNALIil-R603hIHDUNSTEANFLON.)IiCOHTROLLING, FHFLMIDECREASES.

I)il-R603AIHDINACCURATE.

)IFCOHTROLLIHG, FNHlNIRESPONSEREDUCED.I(DPIS.N686C IHDUNFUN.(DPIS-N686D IMDUNFlANISTEANLINEAHIGHFUNHSIVs(CLOSERINHIBITED.

IiN686C/DIMDINACCURATE,

OTHUNISE, SAHEASBROKEN.)NONEIMOMEIIIIIMOME)RPVLEVELDECREASES, STABIL-(NONE1ZESATLOMBLEVELIIINOME12-2477(22)HAINSTEANLINEh,FEHOOSAMICHPRESSURETAPCL13.1 0-APPENDIXhCONTROLSYSTEHSCOHHOMSENSORLINEFAILUREANALYSISMINEHILEPOINT2SHEETIOFIIILINEISYSMO.IDSENSORIDMO.FAILUREITYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOVKRLEVELEFFECTS14C33X003Al6$mIMAXIHtHDPSIGNALIIIIPLUGGEDIINACCURATE DPSIGNALPLUGGEDIINACCURATE DPSIGNAL)l31)X086C(BROEEX)HAIISWDPSIGNALiX086D(FI-R603AIMDHIGHSTEAM1FUN.IFCONTROLLIXG, FVFlANiINCREASES.

l)Fl-R603AINDINACCURATE.

liCONTROLLINGi REDUCEDEV)FIANRESPONSE.

IIDPIS-M686C/D HIGHSTEAMIFUNI.STEANLINEhHIGHIFLOUHSIVsCLOSURE.I(X686C/DINDINACCURATE.

)STEANLIMEhHIGHFUAIHSIVoICLOSUREINHIBITED.

]MOMEIMONE)IISIVCLOSURE,SUBSEQUENT IREACTORSCRAM.II(MONEIIHSIVCLOSlmE,REACTORSCRAMXONE)RPVLEVELINCREASES, STABIL-)MONElIZESATHIGHERLEVEL12-2471(23)HAINSTEANLINEA,FN-M005hLOUPRESSURETAPCL14.1

APPENDIXhCONTROLSYSTEMSCOHHONSENSORLINEFAILUREANALYSISNINEMILEPOINT2SHEETIOFILINEISYSISENSORNO.IDIDNO.FAILURETYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOVERLEVELEFFECTSCOMBINEDEFfECTSIE31IPLUGGEDIINACCURATE DPSIGNALIIIM081CIBROKENIHINIHWDPSIGNALNosmIPLUGGEDIINACCURATE DPSIGNAL1$IC33IM03BIBROKENIIIIMIHWDPSIGNALIFI-R6038INDIANSTEANFlAN.IlfCONTROLLIMG, FMFUNIDECREASES.

IIR603BINDINACCURATE.

IIfCONTROLLIMG, REDUCEDFNIFLOMRESPONSE.

IIDPIS-N618C/D IANSTEANFLO'M.ISTEANLINEBHIGHFLOMHSIVaICLOSUREINHIBITED.

IIN681C(DIMDINACCURATE, IOTHERMISE, SANEAsBaokEN.IRPVLEVELDECREASES, ISTABILIZES ATLOMERLEVEL.IIINONEIIIINONEIIIIMoNEIMoMEIMONEIIIINONEINONE12-2471(24)HAINSTEAMLINEB,FE-N0058HIGHPRESSURETAPCL15.I

APPENDIXhCONTROLSYSTEMSCOtSOMSENSORLIMEFAILUREANALYSISNINENILEPOINT2SHEETIOF1I)LINE(SYS(SENSORIDIDMO.C33IN003BFAILURE)TYPEPRIMARYEFFECTSBROEENINAXIHWDPSIGNAL"IPLUGGEDiINACCURATE DPSIGNALIPLUGGEDIINACCURATE DPSIGNALE31)N087CIBROKENINAXIlfQIDPSIGNALIN087DSECONDARY EifECTS)FI-R603BHIGHSTEANFuN.)IFCOMTROLLIMG, WFUNIINCREASES.

R603BIHDINACCURATE.

IFCOhTROLLIHG, REDUCEDFWIFaOVamPOMSE.I)DPIS-MCi87C/D HIGHSTEANIFUN.STEANLIMEBNIGHIFLONItDIVeCLOSURE.I)N687C/DINDIHACCllRATE.

ISTEANLIMEBHIGHHlNNSIia)CLOSUREINHIBITED.

COMBINEDEFFECTS)NSIVCLOSURE,SUBSEQUEHT

)REhCTORSCRAM.IIIMONEIJNSIVCLOSURE,REACTORSCRAIIHONERPVLIQUIDLEVELPRESSUREORBNERLEVELEFFECTS)RPVLEVELIMCREASESi INONEISTABILIZES ATHIGHERLEVEL.IIINONEINONE12-2477(25)MAIMSTEAMLIHEB,FE-H005B1ANPRESSURETAPCLI.I

APPENDIXhCONTROLSYSTEMSCOSOMSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEETIOiIILIHX)SYSMO.IDSENSOR)FAILUREIIDMO.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORHNERLEVELEffECTSCOtSIREDEFFECTS17IC33IE31IMOO3C)EmmNIMOGNDPSIGNALIPlljGGEDIINACCURATE DPSIGNALN088CIEROKEMINIMmlDPSIGNALINACCURATE DPSIGNAL)flR603IMDLOQSTEANFuN.)IfCOHTROLLIKG, FNfuNIDECREASES.

I)R603CIHDINACCURATE.

)lfCOHTROLLIHG, REDUCEDRt)HlNRESPONSE.

I)DPIS-M688C/D QNSYPHFDN.iSTEANLINECHIGHFUNNSIVaICLOSURr.IMHIalTED.

I(N688C/DIMDIHACCURATEs IOTNERNISE, SANEASRROEEH.IRPVLEVELDECREASES, ISTABILIZES ATGNKRLEVEL.IIIMOME)NOREIIIIMOMEINONEINONE)NOHEINONE12-2477(26)HAIHSTEQlLINEC,FE-HOOSCHIGHPRESSURETAPCL17.1

APPENDIXACONTROLSYSTEMSCOMMONSEHSORLIMEFAILUREAMALYSISNINEMILEPOINT2SHEET1OFII)LINEISYSHO.IDSENSORIDNO.FAILURETYPEPRIMARYEFFECTSSECOHDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTSCOMBINEDEFFECTS14IC33M003CIBROKEN)!QXINRIDPSICHAL)PLUGGED)1MACCURATE DPSIGNAL)E31(MOddC)BROKEN)MAXIMIZEDPSIGNALlMObbD)Fl-R603CHICHSTEAMFlAN.)IFCOHTROLLIHG, FNFIAN)INCREASES.

I)R603CINDINACCURATE.

fIFCOHTROLLIHG, REDUCEDWfFIAWRESPONSE.

(DPIS-M688C/D HIGHSTEAM)FIAT.STEAMLINECHIGH)FIATSMSIVaCLOSURE.I)M688C/DINDINACCURATE.

)STEAMLIMECHIGHFuNMSIVa)CLOSUREINHIBITED.

IMONE(MSIVCLOSURE.SUBSEQUENT IREACTORSCRAM.II)MOMEIIMSIVCLOSUREREACTORSCRAM)NONE(RPVLEVELINCREASES, IMOMEISTABILIZES ATHIGHERLEVEL.IIfMONEHAINSTEAMLIHEC,FE-N005CIANPRESSURETAPCL18.1

APPENDIXhCONTROLSYSTEMSCOtSOMSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEETIOFILIMENO.SYSISENSORIDIDNO.FAILURETYPESECONDARY EFfECTSRPVLIQUIDLEVELPRESSUREORPOIKRLEVELEFfECTSCOHBIMEDEFFECTSIE31IN089CIN089D"BROKENHIMIHtRIDPSIGNALIPLUGGEDIMACCImATE DPSIGNAL19IC33IN003D)BROEENHINIHtRIDPSIGNALIIIIPLINYI1NACmRATE DPSIGNAL)FI-R603DINDUNSTEANFlN.)IFCONTROLLING, FMFllN)DECREASES.

I)R603DINDINACCURATE.

)IFCONTROLLING, REDUCEDFVIFueHESPONSE.

I(DPIS"H689C/D uNSTEAMPION.ISTEAULINEDHIGHfuNHSIVs(CLOSCIRINHIBITED.

I)N689C/DINDINACCURATE,

)OTHEIaaSE, SAHEASBROXEN.)RPVLEVELDECREASES, ISTABILIZES ATDNERLEVEL.IIiNONEINOMEIMOMEIMOMEIMONEl2-2417(28)HAINSTEAMLINED,FE-M005DHIGHPRESSURETAPCL19.1

APPENDIXACONTROLSYSTEMSCOtSONSENSORLINEFAILUREANALYSISNINENILEPOINT2SHEETIOFII)LIMEISYSNO.IDSENSOR)FAILURE)IDMO.TYPEPRINARYEFFECTSSECOHDARY EFFECTSRPVLIQUIDLEVELPRESSUREORONERLEVELEFFECTS20C33PNGGEDINACCURATE DPSIGNALE31IN089CIIM089DRROEEMIHAXIISBIDPSIGNALPLUGGEDIINACCURATE DPSIGNALM003DIRROKEMINAXIIRRIDPSIGNAL)Ff-R603DINDHIGHSTEANIFLOlt.IFCOHTROLLINGo FV)FLOMINCREASES.

I)R603DINDINACCURATE.

IF(CONTROLLING, REDUCEDFVFllW)RESPONSE.

I)DPIS-M689C/D NIGHSTEAN)FLOlt.STEAMLINEDNIGH)FLOMHSIVsCLOSURE.I)N689C/DIHDINACCURATE.

ISTEANLINEDMIGSHlNHSIVaICLOSUREIMRISITED.

IRPVLEVELIHCREASESo ISTABILIZES ATNIGHERLEVEL.II)NOREII)HSIVCLOSURE,SUBSEQUENT IREACTORSCRAIlIIINOMEI)MONEIlI)HSIVCLOSURE,REACTORSCRAllINOMEi~~eve/colHAINSTEAHLIHED,FE-H005DLOMPRESSURETAPCL20.I

~~

I'III.II'III'III:IIII~'III'.II'I'IlI:I:III'IIIIIIII'II.III

~~

FI'II4.IIIIIIIII'II:'IIII:NIII'II.'n>I'I~III'I'I:':I'III'.!I~:III

~~

APPENDIXACONTROLSYSTEMSCOHHOHSENSORLIMEFAILUREANALYSISNINENILEPOINT2SHEETIOiIIILINEISYS)SENSORIFAILUREIMO.IDIDMO.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOORLEVELEFFECTSCOMBINEDEFFECTS23IC33IM0025IBROKENINMINWDPSIGNALIPLUGGEDIINACCURATE DPSIGNAL)Fl-R604BIMDilNFMFUNtFS-K6ISA/B RECIRCPUMPSTRIP)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.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVI.IQUIDLEVELPRESSUREORPOVERLEVELEFFECTSCOMBINEDEFFECTS24IC33MOO2BIBROmIMAXIMlNDPSIGNALlIPLUGGEDIINACCURATE DPSIGNAL)Fl-R604BIHDHIGHRfFLtN.)FS-E618A/B F11LINEBUN)FUNRECIRCPUMPSTRIPIHHIBITED IFCONTROLLING'

4FQNDECREASES

~I)R604BIHDINACCURATE.

IFiCOHTROLLIHG, FVFIOMCHANGE/RESPONSEREDUCED'THERHISE

~ISAMEASBROEEN)RPVLEVELDECREASES, IRPVllWLEVEL3REACTORIPROBABLEllNLEVEL3SCRAM.)SCRAM.)MONEII12-2477(33)MAINFKEDVATER LIHEB,FE-HOOlBUNPRESSURETAPCL2.I

APPENDIXhCOHTROLSYSTEMSCOHHOMSENSORLIMEFAILUREANALYSISMINENILEPOINT2SHEETIOFII)LINEISYSISENSORIFAILUREIMO.IDIDMO.TYPEPRIMARYEFFECTS'ECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOIIERLEVELEFFECTSCOMBINEDEFfECTS2SICWII2CMH-IBROEEMIPsnhI)2CMH-PSIAAI)lCMH-IPLUGGEDIHIMIHWPRESSURESIGNAL)2CNN-PIOA fEEDPUHPSUCTION(SLIGHTDECREASEIMRPVPRESSUREQNANNUNCIATION,

)LEVEL.REACTORPOORISINDICATIOM STARTSSTANDBY)REDUCED,fCONDENSATE BOOSTERPUMP,)TRIPSFEEDPUMP2FNS-PIA,

)FIANTRUNBACKTO6$PERCENT)OFRATEDLOAD.IINACCURATE PRESSURESIGHAL)INDICATOR PIIOAIMACClSATR.

)PUtlP280-PlhlllLLCOHTIHUE)TORUMIFSUCTIONPRESSUREl1$LMRESUL'IIHG INPUMP)DAMAGE.STANDBYCONDENSATE IPUMPSTARTINHIBITED.

)MONEfMONEREACTORFEEDMATER PUMPhSUCTIONLIHETAPVlbh)MOTE:ONLYhLINEINSTRU-(MENTSLISTED,BAHDCLIMEIHSTRUHENTS AMDEFFECTSISIHIMt.ICL25.I

APPEHDIXACOHTROLSYSTEHSColQIOHSENSORLINKFAILUREAHALYSISHIHKttILKPOINT2SHEET)OiILINKNo.SYSIDSENSORIFAILUREIIDNO.TYPEPRIttARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTS~COHBINKDEFFECTS26DSR2DSRLT65A2DSR-Ls68h2DSR-LS6lh)2DSR-L868A)2DSR-I,T68h)BROKENIIIIIIIIII)IiINITIALSTAHDPIPK LEVEL)ABOVEBROKENLIHK,ALLIHSTRUHKHTS OHSTANDPIPE ISENSEDNLEVEL.PLUGGEDIALLIHSIRUHKNTS SENSEIINACCURATE PRKSBURE.

IBROKENIliLHITIALSTANDPIPE LEVELIBKMMBRGKENLINE,ALLIIHSTRUHEHTS ONSTANDPIPE ISKHSKHIGHLEVEL.)"HolsTURE sEPARAT0R REHEATERIIDRAIHSTROUBLE"ANNUNCIATION.

IIRKHEATERDRAIHIIascslvaaZDSR-TK6A I)HORHAL'MATERLEVELDRAINICONTROLVALVES2DSRIVK65hiI)2DSR-LVY65h, ZDSR-LVZ65A, IAHDHIGHMATERLEVELDRAINICONTROLVALVE2DSR-LV68h

)CLOSES.PARTIALLOSSOiIFEEWATERHEATIHGAT6TH)POIHTHEATERS2R5-E6A,)I2R5-E68,AND285-K6C.IDRAIHRECEIVERLEVELMILLIINCREASE.

I)"ttOISTURK SEPARATOR RKHEATKRIDRAINSTROUBLE"ANNUNCIAI)TIOHDRAINVALVESI)2DSR-LVX65h, ZDSR-LVY65A)

II2DSR-LVZ65A, 2DSR-LV68A

)OPEH.PARTIALLOSSOFIFEKDMATER HEATIHGAT6THIPOINTHEATERSZR5-E6hiI)ZR5-E68,AND2R5-86C.)REHEATSTEhttSUPPLYVALVES)Rt?SS-AOV92A ANDBCLOSE.)Loss0FB0THttolsTURE

)sEPARATDR REHKATEas.

REHEATIISTEANCOHTROLVALVEDRAIHIIVALVES2HSSttOV9hANDBOPEN.IIIIHIGHLEVELINDRAINRECEIVERIItthYNOTOPENDRAINVALVEII2DSR-LV68h RESULTIHG IN)MATERBACKUPTORKHKATER.

SLIGHTDECREASEINFEEWATKRTKHPERATURE MILLRESULTIHIHCREASEOFCOREPOMKRMHICHIMlLLBKCotfPKHSATED BYttODULATION OFCOREFlAW.INCREASEIH2DSR-TK6A LEVELMILLRESULTIH'MATERBACKUPToREHEATER.

TEHPERATURE oiISTEANTOLOMPRESSURETURBINEMILLREDUCE.THIStthYRESULTINTURBINEVIBRA-TIONS,TRIPiAHDREACTOR8CRAH.NONESLIGHTDECREASEINiKEWhTKRTEHPERATURE MILLRESULTINIHcaahseoFcoaKPOMKRMHlcHIMlLLBECOHPEHSATED BYttODULATIOH OFCOREFlANLOSSOiHOISTURKSEPARATOR REHEATERREDUCESDNPRESS.TURBINEEFFICIEHCY.ZHSS-ttOV9h AHDBPOSSIBMTURBINEVIBRATIONS

~)HONKTRIPqAHDREACTORSCRAM,12-2477{35)ttOISTURE SEPARATOR RKHEATERDRAINRECEIVERTAHXhLEVELSTAHDPIPK INOTEsONLYhLINEIHSTI?U-IttKNTSI,ISTKD,BANDCLINE)IHSTRUHKHTS ANDEFFECTSISIHILAR.ICL2~I

APPENDIXhCONTROLSYSTEHSCOHHOHSENSORLIHEFAILUREANALYSISHIHENILEPOIHT2SHEETIOFIIII)LINE)SYS)SENSOR)FAILURE)NO.IDIDHO.TYPEPRIMARYEFfECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTSCOMBIREDEFFECTS27IHDL)II2HDL-LSIA2HDL-L87ABROKENIIFINITIALSTANDPiPE LEVEL)ABOVEBROKENLIHE,ALL)IHSTRUHEHTS ONSTANDPIPE

)SENSELOMLEVEI..IBROKENIIFINITIALSTANDPIPE LEVELIBELOMBROKEHLINE>ALLIHSTRUHENTS ONSTANDPIPE ISEHSEHIGHLEVEL.IPLUGGEDIALLIHSTRUHENTS SEHSEIINACCURATE PRESSURE)NONEISTPOIHTHEATERMATERLEVELIHIGHANNUNCIATION.

4THPOINTHEATERDRAINPUHPI2HDL-PlhTRIP.LOSSOFFLOMITOCONDENSATE SYSTEH.tHOISTURESEPARATOR DRAIN)RECEIVER2DSH-TK4h ANDTK4BHORHALDRAIHVALVESt2DSH-LVX75h AND2DSH-LVX75B tCLOSE.6THPOINTHEATERIHORHALDRAINVALVE2HDH-LV6h CLOSE.CONDENSATE IiEATERISTRINGhOUTLETVALVE2CNH-HOV32A AHDINLETVALVE2CNH-HOV33h CLOSE.IfPOSSIBLECONDENSATE HEATERISTRING"A"ISOLATION LOSS~IIAiEHISTPOINTHEATER)2CHH-ElhLEVELISNIGH,)MATERINDUCTIOH INTOTURBINEIMILLRESULTIHTURBINEIVIBRATIONS, POSSIBLETllRBIHEITRIPLEADIHGTOREACTORSCRAM.I(NONEINONE)HONE)NONEILOSSOFCONDENSATE HEATERINONE)STRINGAREDUCESFEEDMATER

)TEHPERATURE TOREACTOR>CORE)POMERIHCRFASES.

REACTORIRECIRCULATION FLOMDECREASES IIREESTABLISHIHG POMERLEVEL.I12-2477(36)ISTPOIHTCONDENSATE FEEDMATER HEATERhLEVELSTAHDPIPE IHOTE:ONLYhLINEIHSTRUIHENTSLISTEDiBANDCLINEIHSTRUHEHTS AHDEFFECTSISIHILAR.ICL27.I

APPENDIXhCOHTROLSYSTEHSCOHHOHSENSORLIHEFAILUREAHALYSISHIHENILEPOINT2SHEETIOFIIII)LIHE)SYSJSEHSOR)FAILURE)HO.IDIDHO.TYPEPRIHARYEFFECTSI28)HDLI2HDL-IBROKEHIHIGHLEVELSIGNALLSSAIPLUGGEDIIHACCURATE PRESSURESIGNALSECONDARY EFFECTS("2NDPOINTHEATERWATERILEVELHIGH"AHHUNCIATION.

I4THPOIHTHEATERDRAINPUHP2HDL-PlhTRIP.HOISTUREISEPARATOR DRAINRECEIVERS 2DSM-TK4A AND2DSH-TK4B

)HORHALDRAINVALVES2DSH-LVX75h ANDI2DSH-LVX75B CLOSE.6THIPOINTHEATERNORHALDRAIHVALVE2HDII-LV6h CLOSES.CONDENSATE HEATERSTRINGhJOUTLETVALVE2CNH-HOV32h IAHDINLETVALVE2ChH-HOV33A ICLOSE.IPOSSIBLECONDENSATE HEATER)STRIHG"h"ISOLATION LOSSIWNEH2NDPOINTHEATER2CNH-E2ALEVELISHIGH.IHIGHWATERINDUCTIOH INTOITURBINEWILLRESULTIN)TURBINEVIBRATIONS, POSSIBLEITURBINETRIP,REACTORSCRAH.)HONEINONERPVLIQUIDLEVELPRESSUREORPOWERLEVELEFFECTSILOSSOFCONDEHSATE FEEDWATER INONEIHEATERSTRINGA.REDUCESIIFEEDWATER TEHPERATURE TOREACTOR,COREPOWERIHCREASES.)

REACTORRECIRCULATIOH FLOWIDECREASES, REESTABLISHIHG IPOWERLEVEL.COHBIHEDEFFECTS12-2477(37)2HDPOINTCONDEHSATE FEEPWATER HEATERhTAPVISA(LEVELREFERENCE LEG))NOTE:ONLYALINEIHSTRU-IHENTSLISTEDoBANDCLINEINSTRUHEHTS AHDEFFECTSISIHILAR.ICL2B.I

APPENDIXhCOMIROLSYSTEMSCONHOHSEHSORLIMEFAILUREANALYSISMIMEMILEPOIHT2SHEETIOFII(LIME)SYSISENSOR)FAIUJRE)IDlDNO.TYPEMO.PRINARYEFFECTSSECONDARY EFFECTSRPVLlqUIDLEVELPRESSUREORPOlKRLEVELEFFECTS29MDL)2HDLIBROKENIQWLEVELSIGNALI2HDPOINTHKhTERMATERLEVELIPOSSIBLETURBINETRIPoiMONEPLUGGEDI(SANKASBROXKNLOIIANMUMCIATIOHy OTHKRMISE

~)REACTORSCRAMISHEASPLUGGEDLIME2SiABOVEIINACCURATE PRESSURESIGNALISANEASBROKEN12-2477(38)2HDPOINTCOMDEHSATK FEEWATKRHEATERhTAPVI9h(LEVELVARIABLELEG)tNOTE:ONLYhLINEINSTRU-IMENTSLISTED'ANDCLIMEIHSTRUHENTS AMDEFFECTSISIMILAR.ICL29.I Iv APPENDIXhCONTROLSYSmfSCOIDIONSENSORLINEFAILUREANALYSISHINEIflLEPOINT2SHEETIOFIIII,INE)SYSISENSORIDIDNO.PAILURK)TTPKPRIMARYKfFECTSSECONDARY EFFECTSRPVLIqUIDLEVELPRESSUREORPOMERLEVELEffECTS30HDLI2HDL-ILT3A)28DLLS9A2BDLaIS13hI2HDLLS23A)2BDL-LT23ABRDKKM(IFINITIALSTANDPIPE LEVELIABOVEBROKEXLINE,ALL)IMSTRNfEHTS OXSTANDPIPE

)SKXSKLOMLEVELSBROKEN)IPINITIALSTANDPIPE LEVELIBELOMBROKEMLIME>ALL(IHSTRINEHTS OHSTANDPIPE ISENSEHIGHLEVELSIPLUGGEDIALLIMSTRUHEHTS SENSEIINACCURATE PRESSUREI~'3RDPOIHTHEATERMATERILEVELPAPAHNUNCIATlOH.

j3IIDPOINTHEATER2CHlf-E3h

)HORlfhLLEVELDRAINVALVE)2IIDL-LOV3h AHDHIGHLEVEL(DIIAIMVALVE2HDL-LV23A ICASKIIEATERMATERLEVELIMl!.LINCREASE.

LOSSOFCON-)DEHSATKHEATIXGAT3RDPOINT)BEATERDRAINCOOM'2QII-DCL3A.

I)"3RDPOINTBEATERMATER)LEVELHIGH"ANNUIICIATIOH.

)DRAIXVALVES2HDL-LV3A AND]2HDL-LV23A OPEN.3RDPOIHTIHEATER2CHH-E3AEXTRACTION

)STEANISOLATION VALVEI2ESS-IIOV15A AHDHON-RETURN (VALVE2ESS-HRVI6A CLOSE.(LOSSOiCONDENSATE BEATING)AT3RDPOIHTHEATER2CIIH-E3A

)ANDDRAINCOOLER2CNII-DCL3A.

I)HIGHMATERLEVELHAYNOTISOLATEHEATEREXTRACTION

)STKhffVALVES.)DECREASEIHFEEDMATER tNONEITEMPERATURE MILLRESULTIX)INCREASEOFCOREPOMER)tCOlfPEHSATED BYIfODULATIOM OPI)COREPLOM.IIIIPOSSIBLEMATERIHDUCTIOM INTOTURBINERESULTIHG llfITURBINETRIP,REACTORSCRAIf.MOME)SLIGHTDECREASEINFEEDMATER

]MOXK]TEMPERATURE MILLRESULTIN)IINCREASEOFCOREPOMERI)COHPEHSATKD BYIIODULATIOM OF()COREFLOM.INCREASEIHiHEATERMATERLEVELPOSSIBI.Y IMILLLEADTOMATERINDUCTIOH lINTOTURBINERKSULTIHG INITURBIXETRIP.12-2471(39)3RDPOIHTCONDENSATE FEEDMATER HEATERhLEVELSTANDPIPE

)HOTEiOHLYhLINEIHSTRU-IIfENTSLISTED,BANDCLIXEIINSTRUMENTS AMDEFFECTS)SIMILAR.ICL30.1

APPEXDIXACONTROLSYSTENSCONNOHSENSORLINEFAILUREAHALYSISMIHENILEPOINT2SHEETIOFIlLIMEISYSISRHSGR)FAILURENO.IDIDNO.TYPEPRINARYEFfECTSSECOHDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFfECTSCONEINEDEffECTS31XDLI2HDL-)I.T4AI2HDL-LSIDA)2HDLL814A2HDL-LS24AI2XDL-LT24AIBROKENIIIIIIlIIIIBROKEN(ALLINSTRUMENTS OHSTAHDPIPH

)SENSEuJMLHVEL,IFINITIAL)STANDPIPE LKVHLABOVEBROXRXiLIME.)ALLIMSTRUHHMTS ONSTANDPIPE tSENSEHIGHLEVHLrIFINITIALISTAXDPIPH LEVELBHLOMBROHKXILINE.tPLUGGED(ALLIMSIRUNEMTS SEMSHICONSTANTPRESSURE)"4THPOINTHEATER2CNN-E4h)MATERLEVELLOM"AHHUHCIA-

)TIOH,FALSEIHDICATIOH.2HDL

)LIC4h.HORNALLEVELDRAIXIVALVE2HDL-LV4A AMDHIGHI)LEVELDRAIHVALVE2HDL-LV24h fiCLOSE.4THPOINTHEATER)MATERLEVELINCREASES.

LOSS))OfHEATERDRAIHPUMPihfMTOI)CONDENSATE SYSTE!l.IlITHPOINTHEATERMATERLEVELHIGHANNUNCIATION

~IFALSEINDICATION.

2HDL-LIC4A.I IVALVES2HDLLV4AAHDII2NDLLV24AOPEN~LOSSOfII4THPOINTHEATERDRAINPUNP)FLOMTOCONDENSATE SYSTEN.)5THPOINTHEATERNORNALIDRAIHVALVE2HDL-LV5A CLOSESItMOISTURESEPARATOR DRAIH)RECEIVERTAHE2DSN-TX4h AND)TK4B.DRAINVALVES)2DSN-LVX75A AND2DSN-IVX75B

)CLOSE.EXTRACTIOH STEANIISOLATIOH VALVE2ESS-NOV22A

)AHDNOM-RETURN VALVE)2RSS-NRV23A CLOSE.LOSSOFICONDENSATE NRATIXGAT4TH)POINTHEATER.IIHIGHMATERLEVELIHHEATERI2CHN-E4AHAYHOTISOLATE)tHEATEREXTRACTION STEANI)VALVES.INCREASEIXHEATERMATERtLEVELMILLLEADTOMATERIHDUCTIOM INTOTURBIHEPOSSIBLYRESULTIHG IHTURBINETRIP,REACTORSCRAM.DECREASEIHFEEDMATER (NOXHTENPERATlJRE MILLRESULTIHINCREASEOFCOREPOMERMHICHIMILLBECONPENSATED BYINSULATIOH OFCORKFLOll.POSSIBLEMATERIHDUCTIOH (XOXHINTOTlJRBINERESULTING IHTURBINETRIP,REACTORSCRAN.12-2477(40)4THPOINTCONDENSATE FEEDMATER HEATERhLEVELSTANDPIPE iNOTE:ONLYhLINEIMSTRU-INEHTSLISTEDrbANDCLINEIHSTRINENTS ANDEFFECTSISINILAR.ICL31.I

APPENDIXhCONTROLSYSTEttSNtOHSENSORLINEFAILUREANALYSISMIMENILEPOINT2SHEETIOFIIILINEISYSISENSORIFAILUREIlm.IDIDMO.TYPEPRIllARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOMERLEVELEFFECTSCOttBIREDEFFECTS32IHDLI2HDLLTSA2tmL>>LSIIA2HDLLS25iI2HDL-LT2SAI2HDL-IBRORRMIIIIIIIIIIIIBROKENIIFINITIALSTANDPIPE LEVELIABOVEBROKENLINE,ALLIINSTRNIKMTS OXSTAXDPIPE ISENSELOQLEVELIIFINITIALSTANDPIPE LEVELIBELOMBROtmXLINE,ALLIIMSTRUttEHTS OMSTANDPIPE ISENSEHIGHIIVILoIPNGGRDIALLINSTRlWKXTS SEltSEIINACCURATE PRESSURE.

I"STHPOINTHEATERMATERILEVELLOM"AHHttHCIATIOH.

ISTHPOIHTHEATERXORtthf.IMATERLEVELDRAINVALVE.II2HDL-LVSA ANDHIGHMATERILEVELDRAINVALVE2llDL-LV25A IICLOSE.PARTIALLOSSOFCOH-IIDKXSATKHEATINOAT4THPOIHTIIHEATER2CNtt-E4h.

ST8POINTIIHEATER2CNH-ESAQATKRLEVELIIMILLIltCREASR.

IIII"STHPOIHTHEATERMATERIILEVELHIGH"ANNUNCIATION.

IIDRAIXVALVES2HDL-LVSA ANDI2HDL-LV25h OPEH.PARTIALLOSSOFCONDENSATE HKATIXGIIAT4THPOINTHEATERI2CNtt-K4A.

STHPOINTHEATERI2CNtt-ESA EXTRACTION STEANIISOLATION VALVE2ESS-ttOV2SA ICLOSES.LOSSOFCONDENSATE IHEATIHGATSTHPOINTHEATERI2CtOI-RSA.

IIHIGHMATERLEVELIHHEATERI2NH-ESAtthYNOTISOLATEImamaRXTRACTIOX STRAHIIVALVE.ISLIGHTDECREASEINFEKDMATER IXONETEMPERATURE MILLRESULTIHIINCREASEOFCOREPOMKRMHICHIMILLBECOMPENSATED BYMODULATION OFCOREFLOQ.INCREASEIMHEATERMATERLEVELMILLLEADTOMATERINDUCTIOtl INTOTURBINERESULTIHG IMTURBINETRIP,REACTORSCRhtt.DECREASEIXFEEDMATER IMOMETE!fPERATURE MILLRESULTIMIINCREASEOFCOREPOQKRMHICHIMILLBECOtiPKMSATED BYttODULATIOH OFCOREFLOQ.POSSIBLEltATERIHDUCTIOX IXONElltTOTURBINERESULTING IMTURBINETRIP,SCRAM.12-2477VII)STHPOINTCONDENSATE FEEDMATER HEATERALEVELSTAXDPIPE INOTE!ONLYALINKINSTRU-MENTSLISTED'ANDCLINKINSTRUttKXTS AXDEFFECTSISIMILAR.ICL32.I

APPENDIXhCONTROLSYSTKtlSCotSONSENSORLINEFAILUREANALYSISHIHKNILEPOINT2SHEETIOFI$3IHDHI2HM"IBRGKKNLT6A2HDH-LSIA2HPgaLSSAI2MDH-ILS26AII2MDH-ILT26AIIIIBRDKKHIIFINITIALSTANDPIPE LEVELIISABOVEBROKENLIHEiALLIIHSTRQIKMTS OMSTANDPIPE ISENSEllNLEVEL.IIFINITIALSTANDPIPE LEVELISBELOMBROKENLINE,ALLINSTRUtGUITS OItSTANDPIPE ISKMSKHIGHLEVEL.PLUGGEDIALLIHSTRWEHTS SKHSKIIMACCURATK PaKBSURKIILINKIsYsIsENsoRIFAILURE.IMO.IDIDMO.TYPEPRIHARYEFFECTSSECONDARY EFfECTSI6THPOINTHEATERMATERILEVELUN"ANNUNCIATION.

SIXTHPOINTHEATER2fMS-K6hINORMALMATERDRAIHVAI.VEI2HDH-LV6h ANDMICHMATERILEVELDRAIHVALVE2HDH-LV26h IMILLREHAIHFULLYCLOSED'HEATERMATERLEVELMILLIINCREASEPARTIALLOSSPFICOHDKMSATK HEATINGATFIFTHIPO'IMTHEATER2CMH-K5A.

II678POINTHEATERMATERLEVELIMICHAMHilNCIATION.

DRAIHIVALVES2HDH-LV6A AMDLV26hIOPEN,PARTIALLOSSOFCOMIDENSATE'HKATIMGATHEATERSI2CNH-ESA, 2FMS-E6AEXTRAC-ITIONSTEANISOLATIOH VALVEI2ESS-HOV3ho HON-RKTURH VALVEI2ESS-MRV34A SCAVENGING STEANINLETVALVE2DSR-ADVS IA,AHDIHOISTURESEPARATOR RKHEATERIDRAINRECEIVER2DSR-TK6A AMDITK68DRAINYALYEsI2DSR-LVX65A ANDLVX65B.ICLOSE.LOSSOFTOTALFEEDIMATERHEATINGAT2FMS-K6h.

IIMICHMATERLEVELHAYHOTIISOLATEHEATER2FMS-K6AIEXTRACTIOM STEAttVALVES.RPVLIQUIDLEVELPRESSUREORPOMKRLEVELEFfECTSISLICHTDECREASEIMFKKDMATKR IMOMEITEttPKRATURE MILLRESULTINIINCRKAGKoFcoaKPerKRICOMPENSATED BYtiODULATION OFIICOREFLOM.INCREASEINIHEATERMATERIXVELMILLLEADIITOMATERINDUCTIOH IHTOITURBINEREsULTING INTURBINEIITRIP,aKACToaSCRAH.IIDECREASEIHFKKDMATKR IMOMEITEMPERATURE MILLRESULTINIINcaEASF.

oFcoaEPeeRIIcoHPKMSATKD BYHGDULATION oFIIcoREFLet.IIIIIIIIPOSSIBLKMATERINDUCTIOM IIHTOTURBINERESULTING INITURBINETRIP,REACTORSCRAH.6THPOIHTCONDENSATE FEEDMATER HEATERhLEVELSTANDPIPE IMOTE:ONLYhLINEINSTRU-IHKHTSLISTED,BANDCLINKIHSTRUHENTS AMDEFFECTSISIHILAR.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.TYPEPRIMLYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOHERLEVELEFFECTSCOtfBINED EFFECTS35ItfSS)2MSS-)RROEEHPT103)2HSS-PTI04)2tfSS-)PTI77)I(C33-IR007))tfIMINNPRESSURESIGNAL)OPENSTHEPOLUNING:

)TUllBIHESTOPVALVEABOVE)SEATDRAINVALVES,2MSS-MOV2IA, 2tfSS-MOV2IBg I2MSS-MOV21C

~2MSS-MOV21D I)MAIHSTEAMLIMEHEADERDRAINVALVES'MSS AOV191~)2MSS-AOV]94>

2MSS-AOV203

~)2tlSS-AOV205) 2tfSS-AOV209 I)RKHEhTSTEAMLOADCOHTROLIAtfDPIPINGDRAINVALVKe)2tSS-AOV201; EXTRACTIOM

)HEADERDRAINVALVES,2DTM-AOVI04, 2DIM-AOV1051

)EXTRACTION LINKDRAIN)VALVES,2DIM-AOV2A,

)2DTM-AOV2B, 2DTN-AOV2C, 2DTM-AOV3A, 2DTM-AOV3B,

)2DTM-AOV3C, 2DTM-AOVSA>

)2DTtf-hOVSB, 2'-hOVSC, 2DTMAOVSA~2DTMAOVBB~2DTM-AOVSC; AUXILIARY STEAM)TOOFFGASDRAINVALVE,2ASS-AOV144 RKBOILERSTEAM)LINKDRAINVALVES,2DTM-AOV104

~2DTM-AOVI281

)TURBINESTEAMIHLETLOft)POINTDRAINVALVES,I2MSS-MOVIOho 2MSS-MOVIOCs

)AUXII.IARY STEAMLINEDRAINIVALVES>2DTMAOV7A~)2DTM-AOV7B, 2DTM-AOV30A, 2DTMAOV30Bt2DllfAOV3thy)2DTM-AOV3IB, 2DTM-AOV101

~2DTN-AOV107

>2DTM-AOV142, I2DTMAOVI43)2DTM-AOV156;

)TURBINEGENERATOR GLANDSEAL)ANDEXHAUSTSTEAMDRAINVALVE)2DTMAOV1021MOISTURE)SEPARATOR ASBTOTURBIHKIDRAINVALVES'DTM MOV79h)AHD2DSM-MOV79B:

COLDREHEAT)STEAMDRAINVALVES,2CRS-MW7h, 2CRS-MOV7B, I(CONTINUED)

HPTURBINETlTAPV92IDECREASEIMFEEDMATER I)TEtfPERATURE MILLRESULTIH))INCREASEOFCOREPOftKR)COMPENSATED BYMODULATION OF))COREFIAN.INCREASED STEAM)FLOMTOMAINCONDENSER MILLtREDUCESTEAMBYPASS)CAPABILITY.

CL35.1 0

APPENDIXACONTROLSYSTEMSCOMttONSENSORLINKFAILUREAHALYSISNINEMILEPOINT2SHEET2OF2IILlHEISYSISENSORIFAILUREIHO.IDIDNO.TYPEPRIMARYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOVKRLEVKI.EFfECTSCOMBINEDEFFECTS35MSSi2MSS-PT103I2MSS-PTIO4I2MSS-)PTll7I(C33-NOOI)BROKEN)MINIMUMPRESSURESIGNAL(CONTINUED)

PLUGGEDIINACCURATE PRESSURESIGNALI2CRS-MOVShs 2CRS-MOVSBe 2CRSttOV9hy2CRSMOV98~2CRS-MOVIBA, 2CRS-MOVISB; CROSSAROUNDPIPIHGDRAIHIVALVES~2HRSMOVIo2tmS-MOV2; STEAMLINEDRAIN(VALVES,2tlSS-AOV85A, 2MSSAOV85B)2MSSAOVSSC~)2MSS-AOV85D; AHDREHEATIHG STEAMPIPINGDRAINVALVEi2MSS-tlOV I99.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.TYPEPRltthRYEFFECTSSECONDARY EFFECTSRPVLIQUIDLEVELPRESSUREORPOltKRLEVELEFFECTSCOtmINEDEFFECTS2TIUt"PSI30lIPLUGGED)INACCURATE PRESSURESIGNALREDEEMIttlMIHtRI PRESSURESIGNALIOPENSTHEFOLUNING:

)NONE)TURBINESTOPVALVEABOVEISKATDRAIHVALVES,I2HSSttOV2IA)2HSS-ttOV2IB) 2ttSSttOV2IC)2ttSSttOV2ID)IHAINSTEANLINEHEADERDRAINlVALVES)2ttSSAOV191~2HSSAOV194)2HSSAOV203~2ttSSAOV205,2HSS-AOV209

~ICONTROLVALVEBEFORESEAT)DRAINVALVE,2ttSS-ttOVI47.

I)CLOSETHEFOLLOWING:

)SCAVENGING STEANCOXDENSER ISOLATION VALVES,l2DSR-AOV82A) 2DSR-AOV828)

I2DSR-AOV83h) 2DSR-AOV838, I2DSR-AOV84h) 2DSR-AOV84B.

IIOPEttTHEFOLUNIHG:

(TURBINEGENERATOR GLANDSEAL)IAHDEXHAUSTSTEhttDRAINIVALVE>>2DTttAOV102)IAUXILIARY STKhttLIHEDRAIN)VALVE2DTtt-hOV I56.I)XONE)NOHE(NONE)XONE12"2477{46)ttOISTURE SEPARATOR REHEATERSTEAHillNCONTROLVALVESIHSTRUttKHT AIRSUPPLYLIHECL3~I

-1eC

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