参考文稿成果bcfc

DraftedCheckedReviewedApprovedBPLANTPHASEI(2×1000MW)文件编码DOC. 反应堆冷却剂系统手册6章－6.1控制Project文件类型Sub-ItemEngineeringSDA:B:√C: 中广核工程设计NationalAgradeengineeringCertificationNO: NationalAgradeengineeringCertificationNO:编码InternalCP0905-HX-GN-ThisisthepropertyofCNPDCItmustnotbeused、reproduced、transmittedordisclosedwithoutthepriorwrittenpermissionofCNPDC本文件之属于中广核工程设REVISION版日状编Drafted校Checked审Reviewed批Approved修改—说明Modification-A牛PLANTPHASEI(2×1000MW)6章－6.1 SEP,文件修改记录版日章页修改范围及依据AB2345IssueofKPRofKPRofKPRofKPRCONTROL LOGIC OG CONTROLSAVAILABLETOTHE DATAAVAILABLETOTHE INTERLOCKOFREACTORCOOLANTPUMPSUPPERBEARING CONTROLThecontrolprinciplesoftheRCPsystemaregiveninchapter5,paragraph5.6.Theyconsistmainlyof:reactorcoolantpressurecontrolbythepressurizerlevelcontrolbytheRCVReactorcoolantflowisnotcontrolled.Itisconstantsincethereactorcoolantpumpsoperateatconstantspeed.Theaveragereactorcoolanttemperaturedependsontheturbineload(seeRGLsystemmanual).Itisusedasareferenceforthepressurizerlevelprogram.Duringnormaloperation,controlofRCPsystemactuatorsandsurveillanceofRCPsystemoperationarecarriedoutfromthecontrolroom.ActuatorcontrolsandgeneralinformationarecentralizedonKICorBUP.Incaseofunavailabilityofthemaincontrolroom,theplantwillbebroughtintoandmaintainedinsafeshutdownconditionsfromtheremoteshutdownstationwhichisequippedwithsimilarcomputerizedfacilitiesasthoseinstallinMCR.Localoperation,usingmanualcontrolsandlocalswitchgearpanels,canbeusedtobringthereactortocoldshutdownandactsasasupplementtotheremoteshutdownstation.Actuatorsnecessaryfortheseoperationsareemergencydbythedieselgeneratorsintheeventofatotallossofoff-siteelectricpower.FollowingRCPchannelsareincludedinthepost-accidentmonitoringsystemhotlegandcoldlegreactorcoolantpressure(wide-pressurizerpressurizerwaterpressurizersurgelinereactorvesselwaterAutomaticThemainautomaticcontrolloopsontheRCPsystempressurizerpressurecontrolpressurizerlevelcontrolreactorcoolantpressurecontrolloopwhentheRCPsystemiswater-solid.Furthermore,theRCPsystemandequipmentareautomaticallyprotectedagainstoverpressureincidentsand/ormalfunctionasfollows:OverpressureprotectionbypressurizersafetyShutdownofreactorcoolantpumpsincasehighbearinghigh-highleak-offflowofsealNo.1(andRCPpressurehigherthan2.7MPagauge)temporizedsignal,low-lowpumpspeed(andInterlockingofreactorcoolantpumpstartingincaselowoillowdifferentialpressureonseallow-lowleak-offflowonsealClosingofthereactorcoolantpumpsealNo.1leak-offisolationvalvewhentheleak-offflowishigh-high(andRCPpressurehigherthan2.7MPagauge).De-energizationofpressurizerheatersonlow-lowpressurizerClosingofpressurizersprayvalvesonlow-lowpressurizerInterlockingofRRAlinesuctionisolationvalveopeningwithhighreactorcoolantRemoteshutdownstationThelistofcontrolsanddataavailabletotheoperatorattheremoteshutdownstationisgiveninthechapter6.4"Controlsavailabletotheoperatorandinformationavailabletotheoperator".KPRhavethesimilarfunctiontoKIC，butitissmallerthanKIC.FromKPR,theRRABsystemcanbeputinservice,whichistoopentheRRAlinesuctionisolationvalves.ThereactorcoolantpumpscanbeshutdownfromKPRorthelocalswitchgearLogicThelogicrelativetotheRCPsystemisgiveninchapter6.2"LogicThisparagraphgivesthedescriptionandjustificationofactuatorcontrols,includingparticularautomaticcontrolactions.ThereferencetothelogicdiagramisgivenforeachNote:LD:LogicAD:ogicPressurizerspraycontrolvalvesRCP001,002VP(LDsheet1-ManualandautomaticTheseairoperatedcontrolvalvesare–Eitherwitharegulatingopening-closing.Forthispurpose,thevalveisprovidedwithanelectro-paticconverterwhichreceivesthesignalofthepressurizerpressurecontrol(seechapter6.1.3).Tohomogeneizetheboronconcentrationinthepressurizerwiththeboronconcentrationintheprimaryloops,thecontinuoussprayflowisincreased.Tomaintaintheincreasedsprayflow,theregulatingsignalispolarized.ThepolarizationisputinserviceonKIC.ThispolarizationputsalsoinservicethepressurizerheatersRCP001and002RS(seeparagraph3.below).Thepolarizationisalsousefultoreducethermalstressesinthesurgelineduringloadvariationsbecauseitpreventsinversionoftheflow.–Orwithanon/offautomaticclosing.Forthispurpose,thevalveisprovidedwithathreewaysolenoidvalvewhichreceivesa"lowpressurizerpressure"signal.Thepurposeofthison/offclosingistostopthedepressurizationresultingofthefullopeningofthespraycontrolvalvesduetoapermanentwrongcontrolsignal.Thepressuresetpointisfixedatavaluewhichallowstoavoidthereactortripsignal.Thisautomaticon/offclosingisvalidatedbythe"Auto"positionofan"Auto-Manu"selectoronKICorBUP.Whentheautomaticclosingsignalisactuated,armisactuatedinthecontrolThe"Manu"positionisusedtodepressurizethereactorcoolantsystemwhenthepressureisbelowthelowpressurizerpressuresignal.Controlfromtheremoteshutdown ThereactorcoolantpumpscanbeshutdownfromKPRorthelocalswitchgearpanels.Theauxiliarysprayisusedtocontrolthepressurizerpressure.Thespraycontrolvalvesmustbeclosedtoensuretheefficiencyoftheauxiliaryspray(toavoidtheflowofauxiliaryspraybypassesthePressurizersafetyvalvesRCP017,018,019,020,021,022VP(LDsheet4)Thepressurizersafetyvalvesarepilot-operatedvalveswhichopenatapresetpressure.Otherfeaturesareprovidedtopermitthevalvestooperateasrequiredfordifferentsystemconfigurations.IsolationvalvesRCP017,018,Oneachreliefline,therearetwoidenticalsafetyvalvesplacedinseries.Therearoneactsasanisolationvalve(RCP017,018,019VP),toisolatetherelieflineincasetheoverpressureprotectionvalvesfailtoclosefollowingtheiropening.Duringnormaloperation,theisolationvalvesareopen.ThehydrauliclogicfortheisolationvalvesOpeningpressurehigherthanthesetpressure(14.6MPaorpressurelowerthanlowpressure(0.5MPaClosingwhenthepressureislowerthantheclosingpressure(13.9MPaabs)andhigherthanthelowpressure.ManualandautomaticItispossibletoallowforcingthevalvetobeopenedonKICorBUPbelowitssetpressure,andtheforcingopenorderisresetbyP11signal,sothattheisolationsafetyvalvewillclosewhenreactorcoolantpressuredecreases.ControlfromtheremoteshutdownIncaseofdepressurization,thereiscontrolfromtheremoteshutdownstationtoBclosingthesevalves，thevalvescsoclosehydraulically.Itisguardedagainstspurioussignalsfromthecontrolroom.Alltheoverpressureprotectionvalvesareclosedduringnormaloperationandopenwhentheirindividualsetpressuresarereached.ThehydrauliclogicoftheprotectionvalvesopeningwhenpressurehigherthanthesetclosingwhenpressurelowerthantheclosingManualandautomaticWhenthepressureisbetweenthelowpressure(0.5MPa)andthesetpressure,itispossibletoforcetheopeninginthecontrolroom,especiallyforfeedandbleedcoolingdown.ControlfromtheremoteshutdownThereiscontrolfromtheKPRforforceopeningthevalves.Thepositionofevery pressurizersafetyvalveissignaledinthecontrolroomandKPR.Alarmsarewhentheisolationvalvesarenotopenedorwhentheoverpressureprotectionvalvesarenotclosed.ReactorvesselsealleakageisolationvalveRCP016VP(LDsheetThisair-operatedvalvemakesitpossibletoisolaeakagefromthereactorvesselinnersealwhenitreachesacriticallevel.ActuationofthevalveismanualfromthecontrolDrainingRCP104BAisolationvalveRCP142VY(LDsheetThisair-operatedvalveisusedtodrainRCP104BA.Thevalveisclosedtoallowreactorvesselsealleakagemeasurement(RCP085MNlocatedonRCP104BA).Actuationofthevalveismanualfromthecontrolroom.PressurizerreliefwatervalveRCP038VD(LDsheetThisair-operatedvalveswatertothepressurizerrelieftocondense caseofpressurizerrelief.Actuationofthevalveismanualfromthecontrolroom.ReactorcoolantpumpNo.1sealleakageisolationvalvesRCP131,231,331VP(LDsheets11,12,13)Theseair-operatedvalvesmakeitpossibletoisolatethereactorcoolantpumpNo.1sealleakagewhenitreachesatoohighlevel.Thevalvesareautomaticallyclosedbya"hi-hileakflow"signaldbywide-rangeflowchannelsRCV037,039,041MDincoincidencewiththeRCPpressurehighsignal(RCPpressurehigherthan2.7MPagauge).TheycsobemanuallyactuatedfromKICorBUP.OpeningofthevalvesisReactorcoolantpumpstandpipesfillisolationvalvesRCP150,250,350VD(LDsheets14,15,16)Fillingofthereactorcoolantpumpstandpipesisautomaticallyensuredbyair-operatedvalves150,250,350VD,dependingonstandpipelevel.ValvescloseonhighlevelandopenonlowRRAinletisolationvalvesRCP212,215VP(LDsheets17,TheseelectricmotorizedvalvesensureinserialwiththevalvesRRA001VPandRRA021VPtheisolationoftheRRApumpssuction.TheirelectricalsupplyisemergencydbytheManualEachvalveisopenedandclosedonKICorBUP.TheopeningispossibleonlyifthepressureatthesuctionoftheRRAislowerthan2.8MPaabs.TheclosingofthevalvesisdonemanuallyonKIC,thereisnoautomaticclosingincaseofraisingofthepressure.controlfromtheremoteshutdownEachValvecanbeopenedandclosedmanuallyontheremoteshutdownstation.TheopeningispossibleonlyifthepressureatthesuctionoftheRRAislowerthan2.8MPa ventisolationvalveRCP652VY(LDsheetThisair-operatedvalveisusedtoventthepressurizerrelief (PRT)totheventanddrainsystem(RPE),providedthat pressureisnottoohigh(0.05MPagauge).Actuationofthevalveismanualfromthecontrolroom.Reclosingofthevalveisautomaticif pressureexceeds0.05MPagauge.ThisvalveallowstoventeithertheringdownstreamofthesafetyvalvesorthePRT,thedivertingisdonebyRCP111VYand112VY. drainisolationvalveRCP653VP(LDsheetThisair-operatedvalveisusedtodrainthePRTtotheRPEsystem,providedthatfluidtemperatureisnottoohigh(65℃).Actuationofthevalvesismanualfromthecontrolroom.Reclosingofthevalveautomaticiftemperatureexceeds65℃(umallowabletemperaturefortheRPEsystem).PressurizerrelieflinehydrogensweevalvesRCP111,112VY(LDsheets21and22)Theseair-operatedvalvesareusedtomeasurethepossiblepresenceofhydrogenortosweepthepressurizerreliefline.ThevalveRCP111VYisolatestheringdownstreamofthesafetyvalves;theValveRCP112VYisolatesthepressurizerrelief.IncaseofhighpressurizerpressurethevalveRCP111VYreceivesanautomaticprioritysignaltoavoidall dumpedtoRPE.DuringnormaloperationRCP111VYisclosedandRCP112VYisopenedtoallowthesamplingsbytheRENsystemthroughREN231VYortheventingstotheTEGsystemthroughRCP652VY.ThesweeoftheringdownstreamofthesafetyvalvesisdonebyclosingRCP112VYandthenopeningRCP111VYandRCP652VY.ReactorcoolantpumpsRCP001,002,003POandassociatedLubricationpumpsRCP011,021,031PO(LDsheets51,53,Beforestartingthereactorcoolantpump,itisnecessarytoputinservicemanuallythecorrespondinglubricationpumpinordertoensurebearingliftingandformationoftheoilfilmnecessaryforbearinglubrication.Afterstartupofthereactorcoolantpump,thelubricationpumpcanbemanuallyshutdown.Conservationoftheoilfilmunderthebearingsisthenensuredbypumpspeed.ActuationofthelubricationpumpisfromthecontrolMotorwindingheatersRCP008,009,010RS(LDsheets51,53,Themotorwindingheatersareautomaticallyputinserviceassoonasthereactorcoolantpumpisshutdown(circuitbreakernotclosed)inordertoprotectthemotorwindingsagainsthumidity.Heatersareautomaticallyputoutofserviceassoonasthereactorcoolantpumpstarts(circuitbreakercloses).ReactorcoolantpumpsRCP001,002,003PO(LDsheets50,52,54)Startupofthereactorcoolantpumpsismanualfromthecontrolroom.StartupispossiblethecorrespondinglubricationpumpisoperatingandlubeoilpressureisthereactorcoolantpumpNo.1sealdifferentialpressureandthecorrespondingleakoffflowaresufficient.Anindicationlightisputonwhentherequiredconditionsaremet.ThereactorcoolantpumpscanbeshutdownmanuallyfromthecontrolroomwithoutanyShutdownisautomaticathighmotorbearingtemperatureorhighleakoffflowofsealNo.1incoincidencewithRCPpressurehigherthan2.7MPagauge.TheverylowspeedoftwopumpsinconjunctionwithP7signal(P10:reactorpowermorethan10%orP13:turbinepowermorethan12%)tripsthethreepumpsautomatically.ControlroomInthisevent,itisadvisabletoshutdownthereactorcoolantpumpsbeforeevacuationofthecontrolroom.Ifthishasnotbeendone,pumpsmustbeshutdownbymeansofthelocalswitchgearpanels.Pressurizerheaters(LDsheets56toPressurizerheatersareusedincombinationwithspraycontrolvalvestocontrolpressurizerpressure.Theyconsistoffour(4)constantoutputbanksandtwo(2)proportionaloutputbanks.Theproportionaloutputheatersareusedduringnormalreactoroperationtocompensateforpressurizerheatlossandcontinuoussprayflowoperation(duetothemechanicalclosinglimitofthesprayvalves).Thefourconstantoutputheatersareusedtocompensateformajorpressureorlevelvariationsoccurringduringsuddenreactorloadchangesorduringsuchoperationsasplantstartupwhenadditionalheatingpowerisrequired.DuetothepolarisationofthespraycontrolvalvesRCP001and002VP(seeparagraph),thetwoconstantoutputheatersRCP001RSandRCP002RSarealsousedtocompensatepolarizedadditionalsprayflow.ProportionaloutputheatersRCP003,004TheproportionaloutputheaterscanbeenergizedmanuallyfromKICprovidedthatthepressurizerlevelisnottoolow.Theheatpowerdeliveredbytheproportionaloutputheatersisautomaticallycontrolledbythepressurizerpressurecontrolloop(seeparagraph6.1.3).Theheatersareautomaticallyde-energizedatverylowpressurizerConstantoutputheatersRCP001,002,005,006Theconstantoutputheaters,liketheproportionaloutputheaters;canbemanuallyfromKICorBUPprovidedthatthepressurizerlevelisnottoolow.RCP001,002RSarecontrolledmanuallyfromKIC,RCP005,006RSarecontrolledmanuallyfromKICorBUP.Theyareenergizedbyoneofthefollowingsignals:lowpressurizerpressure,measuredbyRCP013,014,highpressurizerleveldeviation(+5%comparedtoreference),measuredbyRCP007,008or011MN.Theheatersareautomaticallyde-energizedatverylowpressurizerTheheatersRCP001and002RSarealsoputinserviceautomaticallywhenthepolarizationofthespraycontrolvalvesRCP001and002VPisinservice.ElectricpowerInordertoprotectagainstatotallossofoff-sitepower,twooutofthefourconstantoutputheaters,RCP005and006RS,areemergencydbydieselgenerators(trainAandtrainB).TheproportionaloutputheatersarenotemergencyControlroomWhenthisoccurs,theheatersremaininautomaticcontrolmode;Ifnecessary,theycanbeswitchedofffromtheswitchgearpanel.ogTheogpartofvalvecontrolisshownonthe"ogDiagrams"giveninchapterThisparagraphdescribesthecontrolchannelsandcontrolloops.Thereferenceoftheogdiagramisgivenforeachcontrolchannelorloop.Note:AD:ogControlReactorvesselsealleakoff(ADsheetAreactorvesselinnersealleakoffisdetectedandrecordedbytemperaturemeasurementRCP001MTwhichactuatesahightemperaturealarm.ThisleakagecanbefiedbyalevelmeasurementRCP085MNlocatedonRCP104BA.Thislevelmeasurementactuatestwoalarms,oneforhighlevelandtheotherforhigh-highlevel.ReactorcoolantpumpInordertoprotectthereactorcoolantpumpsagainstmalfunction,thefollowingparametersarecontinuouslymonitored:bearingandmotorstatorwindingpumpvibrationandshaftrunlubeoilpressureandsealsystemPumpspeedmeasurementisusedforreactorprotection..2.1Bearingtemperatures(ADsheets7,8,9)ThefollowingbearingtemperaturesaredetectedandpumpinletNo.1sealwater(RCP120,220,320motorupperbearing(RCP113,133,213,233,313,motorlowerbearing(RCP110,130,210,230,310,330motorthrustbearing,upperandlowerpad(RCP111,112,131,132,211,212,232,311,312,331,Thereactorcoolantpumpsareshutdownandarmisactuatedincontrolroomathighpadorthrustbearingtemperature..2.2Motorstatorwindingtemperatures(ADsheets7,8,Sixtemperaturedetectorsperpump(RCP114to119MTforpumpNo.1,RCP214to219MTforpumpNo.2,RCP314to319MTforpumpNo.3)areusedtomonitorthemotorstatorwindingtemperatures.ThreesignalsperpumparesenttoKIC..2.3Pumpvibrationandshaftrunout(ADsheets10,11,12)Eachreactorcoolantpumpisprovidedwith:twovibrationmonitors(RCP106and107MV,RCP206and207MV,RCP306and307MV),twoshaftrunoutmonitors(RCP150and151MM,RCP250and251MM,RCP350and351MM).armisactuatedincontrolroomathi-hivibrationlevelorhighshaftrun-out..2.4Lubeoilpressureandlevel(ADsheets10,11,12)Oil otorbearing(upperandloweroilisequippedwithalevelindicatorandaleveldetectorwhichactuates armincaseofhighorlowlevel.)LubeoilBeforestartingthereactorcoolantpump,itisnecessarytostartthelubricationpump.Apressureswitch(RCP105,205or305SP)preventsreactorcoolantpumpsstartupifoilpressureistoolow..2.5Pumpspeed(ADsheetTwospeedmonitorsperpump(RCP140,141MCand240,241MCand340,341MC)areprovidedtoprotectthereactoragainsttheconsequenceofvariationsofnetworkvoltageorfrequency.Aswitchisusedtoselectoneoutoftwochannels.Speedmeasurementisusedinitiatehouseloadoperationatlowspeed(seeRPRsysteminitiatereactortripat1o-lospeed(seeRPRsystemcalculatetheΔT-overpowerandΔT-overtemperaturesetpoints..2.6SealsystemoperationNo.1seal(ADsheet13andADsheetsRCV4,5and6)MonitoringofNo.1sealoperationisassuredby:InjectionflowsensorsRCV021,022,023MD:theinjectionflowisindicatedlocallyandincontrolroom.armisactuatedincaseoflowflow.No.1sealleakageflow.TwoflowreadingsaretakenperAnarrowrangeflowreadingprovidedbyarotameter(RCV036,038,040MD)whichproduces:alowflowalarmincontrolroomindicatingasealfailurewhenthepumpisina1o-loflowsignalwhichpreventspumpstartupuntilleakageflowisAwiderangeflowmeasurementprovidedbyanorificeplate(RCV037,039,041MD)whichproduces:ahighflowalarmincontrolahi-hiflowsignalwhichclosestheNo.1sealleakoffisolationvalveandstopsthecorrespondingreactorcoolantpump,whenreactorcoolantpressureisabove2.7MPagauge.Thisdenotesasealfailure.No.1sealdifferentialpressure(RCP109,209,309MP):indicationisprovidedincontrolroom.Alowdifferentialpressuresignalpreventspumpstartupandalo-lopressuresignalactuatesarm.No.1Sealleakoffpressure:localreadout(RCP132,232,332LP)usedduringuptestsofeachpump.No.2seal(ADsheet15)MonitoringofNo.2sealoperationisassuredAnarrowrangeleakageflowmeasurementprovidedbyarotameter(RCP123,223,323MD)whichproducesanindicationandahighflowalarmincontrolroom.Awiderangeleakageflowmeasurementprovidedbyanorificeplate(RCP131,231,331MD)whichproducesanindicationincontrolroom.No.3Seal(ADsheetWaternecessaryforNo.3sealoperationisprovidedbythestandpipe.FillingofthestandpipeisassuredbytheREAsystem.Hi-hiorlo-lostandpipelevelisalarmedincontrolReactorcoolantReactorcoolantpressure(ADsheetReactorcoolantpressureismeasuredontheRRAsuctionsideupstreamofvalvesRCP212and215VPbysensorsRCP037,039,137and139MP.Thesearewide-rangetransmitterswhichprovideindicationoverthefulloperatingrange.Theyserveasaguidetotheoperatorforreactorcoolantpressurecontrolduringplantstartupandshutdown.TheyensuretheinterlockingofRRAinletisolationvalves(seeRRAsystemmanual).TransmitterRCP039,137and139MPareusedtocontrollow-pressureletdownvalveRCV013VPwhenthereactorcoolantsystemiswater-solid(seeRCVsystemmanual).RCP037,039MPareincludedinthePAMS..3.2ReactorCoolanttemperaturesThereactorcoolanttemperaturesaremeasureddirectlyonreactorcoolantloopsandbypassmanifolds.Looptemperatures(ADsheetReactorcoolanthotlegtemperaturesaremeasuredbysensorsRCP028,043,055MT.ReactorcoolantcoldlegtemperaturesaremeasuredbysensorsRCP029,044,056MT.Thesearewide-rangetemperaturedetector(RTD)locatedonthermowells.Temperaturesarerecordedinordertomonitortheirvariationduringstartupandshutdowntransientsorwhenthereactorcoolantpumpsaretripped.ThesechannelsareincludedintheBypasstemperatures(ADsheets27to30,andsheet30-ReactorcoolanthotandcoldlegtemperaturearealsomeasuredontheRTDbypassmanifolds(RCP030,031,032,045,046,047,057,058,059MTforhottemperatures,RCP033,034,035,048,049,050,060,061,062MTforcoldlegThesearenarrow-rangeRTDswithoutthermowells,andareusedtocomputedifferentaveragetemperature(Tavg)anddifferentialtemperature(T)signalsforuseincontrolandprotectionchannels.MeasurementsfromRCP030and033MTforloopNo.1(ref.RCP045and048forloopNo.2,RCP057and060MTforloopNo.3)areusedtogeneratesignalsforreactorprotectionbyT-overtemperatureandT-overpower(seeRPRsystemMeasurementfromRCP032and035MTforloopNo.1(ref.RCP047and050MTforloopNo.2,RCP059and062MTforloopNo.3)areusedtogeneratesignalsforreactorcontrol.Anauctioneerunitselectsthehighestand TavgandhighestTsignalsfromtheTavgandTsignals.TheauctioneeredTavgsignalisthenusedtocontrol:thepressurizerlevel(seethecondenserbypasssystem(seeGCTsystemTheauctioneeredTsignalisusedtocalculatetheinsertionlimitsofbankR(seeADRGLsheet1).AlarmsaresetoffincaseofhighdeviationoftheauctioneeredsignalsfromindividualloopTavgandTsignals.MeasurementsRCP031,034,046,049,059,061MTarespareandareconnectedtothejack.Note:ADsheet30-1isaduplicationofADsheet30,itisimplementedinCCS,toprovidethemaxandminTavgtoaveragetemperaturecontrolbyregulatingrods..3.3Reactorcoolantflow(ADsheets4,5,Theflowineachreactorcoolantloopismeasuredattheoutletofitscorresponding–loopNo.1:RCP025,026,–loopNo.2:RCP040,041,–loopNo.3:RCP052,053,ThelowflowsignalsareusedintheRPRsystem,forreactortrip(seeRPRsystem.3.4RTDbypassmanifoldreturnflow(ADsheetThecombinedflowfromthehotandcoldlegRTDbypassmanifoldsofeachloopismeasuredbeforeitisrecycledtotheRCPsystem.Alowflowalarmisactuatedinthecontrolroomandtheinaccuracyofthecorrespondingtemperaturesignalsisassumed.ThedifferentpressurizertemperaturesaremonitoredasphaseRCP009waterphaseRCP010spraylinesRCP002and003surgelineRCP004MT,Alarmsareactuatedineaseof: orwaterlowspraywaterlowsurgelinewaterChannelsRCP004MTand010MTareincludedinthePAMS..4.2Pressurizerpressures(ADsheets22,23)ThepressurizerpressureismeasuredbythefollowingRCP005,006,013MP:thesepressuremeasurementsareusedbytheprotectionchannels(seeRPRsystemmanual),RCP013,014,015MP:thesepressuremeasurementsareusedinthecontrolchannels(see.1pressurizerpressurecontrolloop),RCP016MP:thisisusedforcalibrationchecksofotherpressuresignalsinconjunctionwithadeadweighttester(RCP017LP)locatedoutsidethereactorAlarmsareactuatedincontrolroomincasehighpressurizerpressure(RCP013,014,015orlowpressurizerpressure(RCP013,014,0156.1.3:1.4.3Pressurizerlevel(ADsheets24,Threelevelmeasurements(RCP007,008,011MN)areusedreactorprotection(seeRPRsystemandforpressurizerlevelcontrol(see.2).Thefollowingalarmsareprovidedincontrolroom:lowpressurizerhighpressurizerChannelsRCP008and011MNareincludedintheAfourthindependentleveltransmitter(RCP012MN)iscalibratedforlowtemperatureconditions,providepressurizerlevelindicationduringstartup,shutdownandrefuelingoperations(see.7).Pressurizerreliefsystem(ADsheets18,19,20,TemperaturedetectorsareinstalledonpressurizerrelieflinestodetectsafetyvalveRCP090,091,092MToneachpressurizersafetyvalveswaterRCP363MTonRRAandRCVsafetyvalvesdischarge.armisactuatedincaseofhightemperature.Temperaturedetectorsareinstalledonsafetyvalveimpulselines(RCP063,064,065,066,067,068MT)todetectleakageofcontrolcabinetpilotvalves.Analarmisactuatedincaseofhightemperature.Atemperaturedetector(RCP022MT)installedontheliquidphaseofthepressurizerrelief(PRT)providesahightemperaturealarminformingtheoperatorthatcoolingisrequiredandpreventingopeningofthePRTdrainisolationvalve.PressurizerreliefpressureismonitoredbypressuretransmitterRCP024MPwhichpreventsopeningofthePRTventisolationvalveincaseofhighpressureandactuateshighandhi-hipressurealarms.PressurizerrelieflevelismonitoredbyleveldetectorsRCP080SNandRCP023MNwithlevelindicationincontrolroomandalarmincaseofabnormallevel(toohighortoolow).FunnelsinstalledbeneathofsafetyvalvecontrolcabinetsareprovidedwithleveldetectorsRCP084,085,086,087,088,089SN.armisactuatedincaseofhighlevel..5.4SafetyvalvepositionAdisplacementsensor(RCP070,071,072,073,074,075MM)isinstalledoneachsafetyvalvepistonstemwhichindicatesincontrolroomthesafetyvalveposition.Alarmsareprovidedincontrolroomincaseofincorrectpositions.Reactorvesselwaterlevelmonitoringsystem(ADsheet32)Thesystembelongstothepost-accidentmonitoringsystemThesystemisredundant.Thedataareprocessedbyeachtrainofthecoresub-coolingmonitoringsystem.Eachtraininvolvestworanges.Thenarrowrangeisoperationalwhen0or1primarypumpsareinservice.ThenarrowrangegivesagoodindicationofthewaterlevelandtherelativevoidintheItisalsousedtomonitorRCPdrainingduringreactorcoldshutdownformaintenanceorrefueling(see.7).Thewiderangeisoperationalwhen2or3primarypumpsareinservice.ThewiderangeprovidesapproximateindicationoftherelativevoidcontentofthecirculationReactorcoolantsystemlevelmonitoring(ADsheet33andLDsheet118)Duringthereactorcoolantdrainingoperation,theRCPdepressurizedwaterleveliscontinuouslymonitoredincontrolroombythefollowingsensors:pressurizedcold-calibratedlevel(RCP012depressurizedwiderangelevel(RCP098MN)frompressurizertoptoprimaryreactorvesselwaterlevelnarrowrange(RCP090MN)fromvesseltoptoprimaryloopbottom(measuringrangeextensionforRCPdepressurizedwaterlevelMidlooparealevelbyanUltrasonicSensorUS(RCP300MN)measuringRCPwaterlevelfromthetopofdowntomidloopareaofhotlegNo.3.Eachofthe