ML17320B065

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Rev 2 to Procedure 2-OHP 4021.002.005, Draining Rcs.
ML17320B065
Person / Time
Site: Cook American Electric Power icon.png
Issue date: 03/09/1984
From:
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17320B064 List:
References
2-OHP-4021.002., NUDOCS 8405220202
Download: ML17320B065 (11)


Text

ATTACHMENT5INDIANA8NIICHIGANEIECMIGCDNP4NYDONALDC.COOKNUCLEARPLANTFORM5411PROCEDURECOVERSHEETpggg~iireNo.2-OHP4021.002.00DRAININGREACTORCOOLANTSYSTEMHevhionNo.2SCOPEOFREVIS1ONRevision1-Revisedandrewrittentostandardizeformat.AddressedChangeSheets1through6.Revision2-Minorrevisionsduetoshiftreview.DeletdDataSignoffSheet5.2AddressedProcedureChangeSheets1and2.SIGNATURESREVISIONNUMBERORIGINALRev.1Rev.2PREPAREDBYDEPARTMENTHEADAPPROVALJ.OsborneR.BlthB.SverssonK.Bakerp///A/INTERFACINGDEPARTMENTHEADCONCURRENCEQUALITYASSURANCESUPERVISORAPPROVALPLANTNUCLEARSAFETYCOMMITTEEPLANTMANAGERAPPROVALAPPROVALDATER.KeithJ.StietzelD.ShallerD.Palme.06-07-7702-18-82R.JurgensenW.Smith,Jr..i'~',.-,-EFFECTIVEDATE84052202028405i7PDRADQCK050003i6P.PDR6.-0-7702-18-82'I'-Z4 sa2-OHP4021.002.005LZSTOFEFFECTZVEPAGESPAGENUMBERPage1of6Page2of6Page3of6Page4of6Page5of6Page6of6REVZSZONNUMBERANDDATERevision2,03-09-84Revision2,03-09-84Revision2,03-09-84Revision2,03-09-84Revision2,03-09-84Revision2,03-09-84DATA/SZGNOFFSHEET5.1Page1of2Page2o2Revision2,03-09-84Revision2,03-09-84?age1of1Rev.2 2-OHP4021.002'05INDIANA6MICHIGANELECTRICCOMPANYDONALDC.COOKNUCLEARPLANTDRAININGREACTORCOOLANTSYSTEM1.0OBJECTIVE1.1TolowerthereactorcoolantlevelintheReactorCoolantSystempriortoremovingthereactorvesselheadorperformingmaintenanceworkrequiringareducedwaterlevel.

2.0REFERENCES

2.1TechnicalSpecifications,AppendixA,Section3.9.1.2.2AEPFlowDiagrams:2.2.12-OP-5128-4,ReactorCoolantSystem.2.2.22-OP-5128A-10,ReactorCoolantSystem.2.2.32-OP-5'29-3,CVCSReactorLetdownandCharging.2.2.412-OP-5137A-5,WDSVentsandDrains.2.2.52-OP-5143-3,EmergencyCoreCooling.2.3PlantOperatingProcedure,2-OHP4021.017.002,PlacinginServiceandOperationofResidualHeatRemovalLoop.3.0INITIALCONDITIONS?ERFORi~iEDBY3.13~23.3Ifreactorvesselheadistobeunbolted,verifyKefflessthanorequalto0.95andTavglessthanorequalto140'F.Zfincoldsnutdown,verifyKefflessthan0.99andTavglessthanorequalto200'F.TheResidualHeatRemovalSystemisinoperation,maintainingreactorcoolantsystemtemperature.Thereactorcoolantdraintankandaminimumofoneothedraintankpumpsisoperable.Thedischargeofthereactorcoolantdraintankpumpis1'neduptoselectedCVCSHUTtanksthroughCS-460.Page1of6Rev.2 PERFORMEDBY3'ThereissufficientcapacityintheCVCSholduptankstoreceivecoolantreleasedfromtheReactorCoolantSystemwhenthepressurizerandthereactorvesselheadaredrained.3.53.6Thepressurizerbackupandvariableheaterbreakersmustbetaggedopen.Thepressurizerisopentothepressurizerrelieftankthroughapoweroperatedreliefvalve.3.7Anitrogenblanketof5psigisbeingmaintainedinthepressurizerfromthepressurizerrelieftankthroughthereliefvalvedischargeline.3.8Atemporarytygonhoseisconnectedtovalve2-RC-116-L3forlevelindication.Thetygonhoseisloopedsothetopoftheloopisatleastten(10)feetabovetheintendedlevelindicationdesiredandattachedtomanualvent2-WD-238onthepressur'zerrel'eftanksTheblanklangeonthePRTvent(2-WD-238)requiresbeingreplacedbyaflangewithapipingteeon'twithtemporaryvalvesonthetwo(2)freeends.Oneendistoconnecttotheleveltygonhose.Theotheristobeconnectedtoatygonhosethatisroutedtotheinstrumentroompurgeexhaustsuctionvalve.Ensuretherearenoloopsealsorkinksinthetygonhosetobeusedorlevelindication.3.9Pressurizerlevelisintheindicatingrangeorfilledsolid.3.10Thereactorheadventisconnectedtothepressurizerrelieftankviainstalledventspoolpiece.3.11Shutandtagshutprimarywatertoboricacidblender12-PW-263.~TerifyCLOSEDandhangaclearanceonprimarywatertochemicalmix'gtank2-PW-256andprimarywaterflushtoemergencvborationline2-PW-265.Thishelpstoavoidaninadvertentdilutionwhileathalfloop.3.12Ifatygonhoseistobeusedforlevelindication,theclosedcircuittelevisionmonitormusbeconnectedandfuntioningproperly.Page2of6Rev.2

~g's~~2-OHP4021.002.0054.0PRECAUTIONS4.14.2TheapplicableRadiationProtectionproceduresforhandlingradioactiveliquidsandforventingvaporsandgassesmustbeobserved.Thewaterlevelinthereactorvesselmustbebelowthevesselflangebeforetheheadisunboltedforremoval.Thereactorflangeelevationis621feet,14inches.Theelevationof4loopis614feet,0inches.ForRCPsealworkand/orsteamgeneratormanwayremoval,thelevelmustbebroughttothecenterlineofthehotandcoldlegs.Thisiscommonlyreferredtoashalfloop.Thelevelshouldbeathalfloopforaperi-odofeighthoursafterthePRTandtygonlevelinstru-mentationisventedtoatmospherebeforeallowingman-waystoberemoved.4.34.44.5Thepressurizerrelieftanklevelmustbereducedtolessthan5%toallownitrogenflowtothepressurizerthroughtheopenpoweroperatedreliefvalve.Maintainreactorcoolantsystemtemperaturegreaterthan60'Ftoensurethereactorheadtemperatureremainsgreaterthan60'FuntiltensionisrelievedfromthereactorheadstudsperWestinghouserefuelingprocedure.DonotdrainReactorCoolantSystembelowcenterlineoftheloops(614'")whennuclearfuelisinthevesselorwhileonRHR.4.6AnytimedrainingoftheRCSisinprogress,carefulobservationoftheRHRSystemisrecuired.Thepumpamperageisthefirs"indicationocavitationorlossofsuction.5.0DATA/SIGNOFFSHEETS5.1Data/SignofSheet5.1,DrainingReactorCoolanValveLineup.6.0INSTRUCTIONSPERFORMEDBY6.16.2CompletetheattachedData/SignoffSheet5.1,DrainingPeactorCoolantValveLineup.StartlowpessureletdownfromtheReactorCoolantSystemviatheResidualHeatRemovalSystemfollowing2-OHP4021.017.002,PlacingInServiceandOperationofResidualHeatRemovalLoop.Page3of6Rev.2

~I~~2-OHP4021.002.005PERZORMEDBY6.3Monitorpressurizerrelieftankpressurewhiledrainingthesystem.Maintainapositivenitrogenpressurenottoexceed5psig.6.46.5Closereactorcoolantdraintankventstoventheader2-DCR-201and2-DCR-203.ThisistopreventgettingwaterintoventheaderwhendrainingReactorCoolantSystem.Openloopdrainisolationvalves2-RC-113-L1,2-RC-113-L2,2-RC-113-L3,and2-RC-113-L4.6.6Loopdrainsflushing-Thesestepsaretobedoneinsequencesotheloopdrainsareflushedcleanofcrud.Openthedrainvalveswidetoallowfullflowtothereactorcoolantdraintank.Valveoffifnecessarytocontrolreactorcoolantdraintanklevelandthenreopentoobtaintherequiredflushingtime.6..6.1,Open2-RC-114-L'ndallowfullflowforaminimumoftwo(2)minutes.6.6.2Open2-RC-114-L4andallowfullflowforaminimumofthree(3)minutes.6.6.3Open2-RC-1'4-L2andallowfullflowfor'minimumoftwo(2)minutes.6.6.4Open2-RC-114-L3andallowfullflowforaminimumofthree(3)minutes.6.7Aftercompletionofste'p6.6,theour(4)loopdrainsshouldbeusedassystemdrains.Thesedrainsandthelowpressureletdownofstep6.2othisprocedurecanbeusedinanycombinationtocontrolthedrainagefromthesystem.NCTEWhenusingloopdrains,stationanoperatorattheWasteDisposalSystempaneltoobservereactorcoolantdra'ntanklevelsothatdrainagecanbecontrolledtopreventfloodingthereactorcoolantdraintank.Page4of6Rev.2 2-OHP4021.002.005PERFORMEDBY6.8Whenpressurizerlevelisreducedto5%indicated,openthereactorheadventvalves2-RC-132and2-RC-133.Reactorcoolantwillnowflowthroughtheconnectedsightglasstothepressurizerrelieftank.Monitorthistanklevelwhiledrainingthiswayandmaintainthelevellessthan5%.6.9Whenreactorcoolantstops'flowingthroughtheflowindicatorconnectedtotheheadventvalve,closealldrains.6.10Placetemporaryrefuelingwater.levelindicatorinservice(tygonhose)byopeningvalves2-RC-113-L3,2-RC-116-L3,1-WD-238,andtemporaryvalveontygonhose.RefertoPrecaution4.3.6.11ContinuedrainingtheReactorCoolantSystembyeitherorbothmethodsofstep6.7ofthisprocedure.Donotusetheloo3drainforthisbecauseitwillcauseafalselevelindication.6.12Astheindicatedlevelapproacheshalfloop,slowdownthedrainageandstopitwhenthelevelisreached.6.13Whilemaintaininglevelathalfloopperformthefollowingsteps:6.13.1Closetnetemporaryvalveontheleve'ygonatthePRTvent.6.13.2RemoveNsupplyfromPRTbyclosing1-GCR-30$.6.13.3SlowlyventPRTtoinstrumentroompurgeexhaustbycrackingorthrottlingtemporaryvalve.6.13.4WhenPRTisfullyvented,slowlythrottleopentemporaryvalveonthetygonlevelhose.6.14CloseRC-116-L3.6.15ClosetemporaryvalveontygonlevelhoseatPRT.Thendisconnectthetygon.hosefromthevalveandhaveitrunupalongsideI3RCPtoaheightgreaterthanthereactorflange(greaterthan622'levation).Page5of6Rev.2

~$'1~e~2MHP4021.002.005PERFORMEDBY6.16Whilemonitoringthelevel,slowlyopenRC-116-L3.(Ensureitisnotallowedtooverflow.)6.17Reestablishlevelathalflooporwheredesiredforworktobeperformed.6.18Maintainlevelathalfloopforeighthourspre-ferred(aminimumof4hours).6.19DeclareRCSathalfloop.PROCEDUREVERIFIEDCOMPLETEBYDATEREVIEWEDBYSRODATE7.0FINALCONDITIONS.7.1Reactorcoolantlevelisatthedesiredlevelre-quiredforsystemmaintenance.Thislevelcanbeanywheredowntothecenterlineoftheloops.Page6of6Rev.2 2-OHP4021.002.005DATA/SIGNOFFSHEET5.1LATESTEEV.CHECKEDDPPZNINQPEACTORCOOLANTVALVELINEUPVALVENUMBER2-NRV-1632-NRV-1642-GCR-3012-RRV-1032-RC-1182-RCllo2-DRV-100DESCRIPTIONPressurizerSprayLoop3PressurizerSprayLoop4N2toPressurizerPeliefTankPressurierFe'iefTankVentReactorVesselFlangeLeakoff(Outer)ReactorVesselFlangeLeakoff(Inner)Reacto"VesselFlangeLeakoffIsolationVALVEPOSITIONCLCLOPCLCLCLPERFORMEDBY2-RC-113LlReactorCoolantLoop1Dra'nValve2-RC-113L2Reacto"Coo'antLoop2DrainValveCLCL2-RC-313L32-RC-113L42-RC-114LlReactorCoo'antLoop3DrainValveReactorCoclantLoop4DrainValveReactcrCoolartLccpIsolatior.ValveDrainCLC2-RC-4L2ReactorCoolantLcopIsolationValve2DrainCL2-RC-114L3ReactorCco'antLoop3DrainIsolaticnVa'eCL2-RC-114L4ReactorCcolantLoop4DrainZsolat'onValveCLOP-OpenCL-ClosedPage1of2Rev~2 2-OHP4021.002.005DATA/SIGNOFFSHEET5.1DPAININGREACTORCOOLANTVALVELINEUPVALVENUMBER2-RC-116L32-NRV-153DESCRIPTIONRefuelingWaterLevel'ndicatorsolationP.O.RelieftoPressurizerReliefTankVALVEPOSITIONCLOPPERFORMEDBY2-NRV-152P.O.PelieftoReliefTankPressurizerOP2-NRV-1512-RC-1212-RC-137P.O.PelieftoPressurizerReliefTankR.V.HeadVenttoPressurizerReliefTankR.V.HeadVenttoPressurizerReliefTankOPOPOP2-RC-1382-RC-1322-RC-133R.V.VenttoR.V.LevelInstrumentationSightglassInletIsolationSightglassOut'etIsolat'onCPCLTemporaryvalve"orPRTVenttoInstrumentRoomPurgeEvhaustCLDATA/SIGNOFFSHEETVERIFIEDCOMPLETEBYDATEREVIEWEDBYSRODATEOP-OpenCL-ClosedPage2ofRev.2

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