ML17263A194

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Rev 7 to EOP AP-TURB.4, Loss of Condenser Vacuum.
ML17263A194
Person / Time
Site: Ginna Constellation icon.png
Issue date: 03/24/1993
From: MARLOW T A
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17263A191 List:
References
AP-TURB.4, NUDOCS 9304080158
Download: ML17263A194 (20)


Text

EOP:AP-TURB.4TITLE:LOSSOFCONDENSER VACUUMREV:7PAGE1of8ROCHESTER GASANDELECTRICCORPORATION GINNASTATIONCONTROLLED COPYNUMBERTECHNICAL REVIEWPORCREVIEWDATEPTSUPERINTENDENT

-2(-9sEFFECTIVE DATECATEGORY1.0REVIEWEDBY:9304080158 930330PDR'DOCK05000244PPDR I)f EOP:AP-TURB.4LOSSOFCONDENSER VACUUMREV:7PAGE2of8A.PURPOSE-Thisprocedure providesthenecessary actionstocontroltheplantwithdecreasing condenser vacuum.B.ENTRYCONDITIONS/SYMPTOMS 1.ENTRYCONDITIONS

-Thisprocedure isenteredfromAP-CW.1,LOSSOFACIRCWATERPUMP,whenacirculating watersystemmalfunction isindicated.

2.SYMPTOMS-ThesymptomsofLOSSOFCONDENSER VACUUMare;a.Lowordecreasing condenser vacuum,orb.Annunciator J-16,MOTOROFFCW-EHEMERGOILSEALOILBU,lit,orc.Annunciator H-7,CONDENSER HIPRESSURE, 25.5"HG,lit,ord.PPCShighcondenser backpressure alarm,ore.Unexplained decreasing generator output.

EOP:AP-TURB.4TITLE:LOSSOFCONDENSER VACUUMREV:7PAGE3of8STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONoIF,ATANYTIMEDURINGTHISPROCEDURE, AREACTORTRIPORSIOCCURS,E-OpREACTORTRIPORSAFETYINJECTION, SHALLBEPERFORMED.

oEXCESSIVE BACKPRESSUREMAYRESULTINTHELASTROWOFTURBINEBLADESOPERATING ASACOMPRESSOR PRODUCING BLADELOADINGOPPOSITETOTHEDIRECTION OFROTATIONANDCAUSINGSEVEREBLADEVIBRATION.

NOTE:oPPCSbackpressure readings(PBACK)shouldbeverifiedbyAOcalculation fromlocalreadingsforeachcondenser.

oOperation intheAVOIDregionshouldbelimitedto20minutesunlessthecauseoflossofvacuumhasbeencorrected andbackpressure isreturning tonormal.1CheckCondenser Indications:

a.Condenser vacuum-GREATERTHAN20INCHESHGb.Turbinebackpressure-EACHCONDENSER WITHINLIMITSOFFIGUREBACKPRESSUREc.Condenser vacuum-STABLEORINCREASING

!a.Performthefollowing:

1)Verifyturbinetrip.2)GotoAP-TURB.l, TURBINETRIPWITHOUTRXTRIPREQUIRED, or'-O,REACTORTRIPorSAFETYINJECTION, asrequired.

b.IFintheAVOIDregion,THENad]ustturbineload(at1%/min)asnecessary toreturntothesafeoperating region.IFintheDONOTOPERATEregion,THENtripthereactorandgotoE-O,REACTORTRIPORSAFETYINJECTION.

c.Decreasegenerator loadasnecessary tostabilize condenser vacuum.IFvacuumcanNOTbestabilized, THENperformthefollowing:

1)Decreasegenerator loadtominimum.2)Tripturbine.3)GotoAP-TURB.1, TURBINETRIPWITHOUTRXTRIPREQUIRED.

AP-TURB-4LOSSOFCONDENSER VACUUMREV:7PAGE4of8STEPACTION/EXPECTED RESPONSERESPONSENOT.OBTAINED2DispatchAOToPerformLocalActions(RefertoAttachment CONDVACUUM)3CheckCondenser Circulating WaterSystem-OPERATING ASREQUIREDIFalossofcirculating waterhasoccurred, THENgotoAP-CW.1,LOSSOFACIRCWATERPUMP:oCWpumpdischarge valves-BOTHOPENoCWpumps-BOTHRUNNING

EOP:AP-TURB.4 TITLE:LOSSOFCONDENSER VACUUMREV:7PAGE5'of8STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED*****************************************CAUTIONoD/PLIMITSONTHEGENERATOR HYDROGENCOOLERANDCONDENSATE COOLERSHOULDNOTBEEXCEEDED(D/PLIMITSINDICTEDATD/PMETERSATMCBREAR).oCLOSELYMONITORFEEDPUMPSUCTIONPRESSUREWHENADJUSTING CONDENSATE COOLINGVALVES.4CheckCondensate Temperature

-LESSTHAN100'F(PPCSpointIDT2053)Performthefollowing:

a.PlaceS/Gblowdownandsamplevalvemasterisolation switchtoCLOSE.b.IFcondensate coolerinservice,THENperformthefollowing:

l)Placegenerator hydrogentemperature controller inMANUALat50%.2)DispatchAOtothrottleclosecondensate coolerbypassvalveasnecessary.

3)Ad]usthydrogentemperature controller andcondensate coolermanualbypassvalveasnecessary toestablish maximumcondensate cooling.5Check,Condenser ForAirInleakage

-NOINLEAKAGE DETECTEDIFcondenser inleakage isdetected, THENperformthefollowing:

a.Isolateifpossible.

b,IFinleakage canNOTbeisolated, THENgotoStep6.

I)

EOPAP-TURB-4TITLE:LOSSOFCONDENSER VACUUMREV:7PAGE6of8STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED6MonitorCondenser Indications:

oCondenser backpressure-LESSTHANFIGUREBACKPRESSUREReturntoStep1.oVacuum-STABLEORINCREASING 7Establish StablePlantConditions:

a.Tavg-TRENDINGTOTREFb.PRZRpressure-TRENDINGTO2235PSIG!a.Ad)ustcontrolrodsandturbineloadasnecessary torestoreTavgtoTref.b.Verifyproperoperation ofPRZRheatersandsprayortakemanualcontrolofPRZRpressurecontroller 431K.IFpressurecanNOTbecontrolled, THENrefertoAP-PRZR.1, ABNORMALPRESSURIZER PRESSURE.

c.PRZRlevel-TRENDINGTOPROGRAMc.Verifyproperoperation ofchargingpumpspeedcontrollers ORtakemanualcontrolofspeedcontrollers tocontrolPRZRlevel.d.S/Glevel-TRENDINGTOPROGRAMd.IFS/GlevelsNOTcontrolling inAUTO,THENplaceaffectedmainfeedregulating valve(s)inmanualandrestoreS/Glevel(s)toprogram.

I EOP:AP-TURB.4TITLE:LOSSOFCONDENSER VACUUMREV:7PAGE7of8STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED8Establish NormalPlantOperation:

a.VerifyEHcontrolinAUTOIMPINa.PlaceEHinAUTOIMPINifdesired.b.Verifyannunciator G-15,STEAMDUMPARMED-EXTINGUISHED b,IF'avgwithin6'FofTref,THENperformthefollowing:

1)Ensuresteamdumpvalvesclosed.c.VerifychargingpumpspeedcontrolinAUTOd.VerifyRodControlSelectorSwitchinAUTO2)Resetsteamdump.c.PlacechargingpumpspeedcontrolinAUTOifdesired.!d.PlaceRodControlSelectorSwitchinAUTOifdesired.e.DispatchAOtoremovepriminge)ectorfromserviceifdesiredf.VerifyS/Gblowdownandsamplevalvemasterisolation switchinREMOTEf.Performthefollowing:

1)DispatchAOtolocallyisolateblowdown.

2)WHENblowdownlocallyisolated, THENplaceblowdownandsamplevalvemasterswitchtoREMOTE.3)DirectAOtorestoreblowdownflow(RefertoT-14F,S/GBLOWDOWNSYSTEMSTARTUP).

I~

EOP:AP-TURB.4LOSSOFCONDENSER VACUUMREV7PAGE8of8STEPACTION/EXPECTED RESPONSERESPONSENOTOBTAINED9NotifyHigherSupervision 10ReturnToProcedure OrGuidanceInEffect-END-

F.OPIAP>>TURB.4TITLE:LOSSPFCONDENSER VACUUMREV:7PAGE1of1AP-TURB.4APPENDIXLISTTITLE'PAGES1)FIGUREBACKPRESSURE2)ATTACHMENT CONDVACUUM

EOP:AP-TURB4T1TLE:LOSSOFCONDENSER VA~REV:7PAGE.1of1BACKPRESSURE(inchesHg)7INCREMENTS 0.2inchesHgFIGUREBACK'RESSURE DONOTOPERATEINTHISREGIONCOMPUTERADDRESSBAROMETRIC PRESS.-P3200HG CONDENSER VACUUM-P3201BACKPRESSURE-PBACKORUSEAUX.OPERATORCALC.AVOIDOPERATION INTHISREGIONSATISFACTORY OPERATING REGIONINCREMENTS 20MW100200300400GROSSELECTRIC(MW)500600 eI)'NI*,h4A