ML17262A893
| ML17262A893 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 05/06/1992 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17262A884 | List: |
| References | |
| ES-3.2, NUDOCS 9206160404 | |
| Download: ML17262A893 (30) | |
Text
EOP:ES-3.2POST-SGTRCOOLDOWNUSINGBLOWDOWNREV:6PAGE1of10ROCHESTERGASANDELECTRICCORPORATIONGINNASTATIONCONTROLLEDCOPYNUMBERTECHNICALREVIEWPORCREVIEWDATE(8ioPLANTSUPERINTENDENTEFECVEDATECATEGORY1.0REVIEWEDBY:r9206160404920605PDRADOCK05000244PPDR T
EOP:ES-3.2POST-SGTRCOOLDOWNUSINGBLOWDONNREV:6PAGE2of10A.PURPOSE-ThisprocedureprovidesactionstocooldownanddepressurizetheplanttocoldshutdownconditionsfollowingaSGTR.ThisrecoverymethoddepressurizestherupturedS/GbydrainingviaS/Gblowdown.B.ENTRYCONDITIONS/SYMPTOMS1.ENTRYCONDITIONS-Thisprocedureisenteredfrom:a.E-3STEAMGENERATORTUBERUPTURE,ifplantstaffselectstheblowdownmethod.
~~II~y EOP:ES-3'TITLE:POST-SGTRCOOLDOWNUSINGBLOWDOWNREV:6PAGE3of10STEPACTION/EXPECTEDRESPONSERESPONSENOTOBTAINEDNOTE:oFOLDOUTpageshouldbeopenANDmonitoredperiodically.oAdverseCNMTvaluesshouldbeusedwheneverCNMTpressureisgreaterthan4psigorCNMTradiationisgreaterthan10+R/hr.1EnergizePRZRHeatersAsNecessaryToSaturatePRZRWaterAtRupturedS/GPressure2CheckIfSIACCUMsShouldBeIsolated:a.Checkthefollowing:oRCSsubcoolingbasedo'ncoreexitT/Cs-GREATERTHANO'USINGFIGUREMINSUBCOOLINGa.GotoECA-3.1,SGTRWITHLOSSOFREACTORCOOLANT-SUBCOOLEDRECOVERYDESIRED,Step"1.oPRZRlevel-GREATERTHAN5%[30%adverseCNMT]b.DispatchAOwithlockedvalvekeytolocallyclosebreakersforSIACCUMdischargevalves~MOV-841,MCCCposition12F~MOV-865,MCCDposition12Cc.CloseSIACCUMoutletvalves~ACCUMA,MOV-841~ACCUMB,MOV-865c.VentanyunisolatedACCUMs:\1)OpenventvalvesforunisolatedSIACCUMs.~ACCUMA,AOV-834A~ACCUMB,AOV-834Bd.LocallyreopenbreakersforMOV-841andMOV-8652)OpenHCV-945.
gpssI'tIP'j EOP:ES-3.2TITLE:POST-SGTRCOOLDOWNUSINGBLO+DOgNREV:6PAGE4of10STEPACTION/EXPECTEDRESPONSERESPONSENOTOBTAINEDNOTE:LeakagefromrupturedS/GintoRCSwilldiluteRCSboronconcentration.3VerifyAdequateShutdownMargina.DirectHPtosampleRCSandrupturedS/Gforboronconcentrationb.Verifyboronconcentration-GREATERTHANREQUIREMENTSOFFIGURESDMb.Borateasnecessary.*****************************************CAUTIONIFCSTLEVELDECREASESTOLESSTHAN5FEET,THENALTERNATEWATERSOURCESFORAFWPUMPSWILLBENECESSARY(REFERTOER-AFW.1,ALTERNATEWATERSUPPLYTOAFWPUMPS).NOTE:TDAFWpumpflowcontrolvalvesfailopenonlossofIA.4CheckIntactS/GLevel:a.Narrowrangelevel-GREATERTHAN58[258adverseCNMT]b.Controlfeedflowtomaintainnarrowrangelevelbetween178[258adverseCNMT)and508a.Maintaintotalfeedflowgreaterthan200gpmuntilnarrowrange~levelgreaterthan58[258adverseCNMT)inintactS/G.b.IFnarrowrangelevelinthe'intactS/Gcontinuestoincreaseinanuncontrolledmanner,THENgotoECA-3.1,SGTRWITHLOSSOFREACTORCOOLANT-SUBCOOLEDRECOVERYDESIRED,Stepl.
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EOPES-3'TITLE:POST-SGTRCOOLDOWNUSINGBLOWDOWNREV6PAGE5of10STEPACTION/EXPECTEDRESPONSERESPONSENOTOBTAINEDNOTE:SincerupturedS/GmaycontinuetodepressurizetolessthantheminimumRCSpressurenecessaryforcontinuedRCPoperation,cooldowntocoldshutdownshouldbecompletedasquicklyaspossible,nottoexceed100'F/hr.5InitiateRCSCooldownTo350'F:a.EstablishandmaintaincooldownrateinRCScoldlegs-LESSTHAN100'F/HRb.DumpsteamtocondenserfromintactS/Gb.ManuallyorlocallydumpsteamfromintactS/GusingS/GARV.IFnointactS/Gavailable,THENperformthefollowing:oUsefaultedS/G.-OR-oGotoECA-3.1,SGTRWITHLOSSOFREACTORCOOLANTSUBCOOLEDRECOVERYDESIREDIStepl.
1 EOP:ES-3.2TITLE%POST-SGTRCOOLDOWNUSZNGBLOgDOggREV6PAGE6of10STEPACTION/EXPECTEDRESPONSERESPONSENOTOBTAINED*****************************************CAUTIONRCSANDRUPTUREDS/GPRESSURESMUSTBEMAINTAINEDLESSTHAN1050PSIG.*****************************************6ControlRCSPressureAndMakeupFlowToMinimizeRCS-To-SecondaryLeakage:a.Performappropriateaction(s)fromtable:PRZRLEVELRUPTUREDS/GNARROWRANGELEVELINCREASINGDECREASINGOFFSCALEHIGHLESSTHAN13%[40%ADVERSECNMT]oIncreaseRCSmakeupflowoDepressurizeRCSusingStep6b.IncreaseRCSoIncreaseRCSmakeupflowmakeupflowoMaintainRCSandrupturedS/GpressureequalBETWEEN13%[40%ADVERSECNMT]AND50%DepressurizeRCSusingStep6b.EnergizePRZRheatersMaintainRCSandrupturedS/GpressureequalBETWEEN50%AND75%oDepressurize[65%ADVERSECNMT]RCSusingStep6b.oDecreaseRCSmakeupflowEnergizePRZRheatersMaintainRCSandrupturedS/GpressureequalGREATERTHAN75%[65%ADVERSECNMT]oDecreaseRCSmake'upflowEnergizePRZRheatersMaintainRCSandrupturedS/Gpressureequalb.UsenormalPRZRspraytoobtaindesiredresultsforStep6ab.IFletdownisinservice,.THENuseauxiliaryspray(AOV-296).IFNOT,THENuseonePRZRPORV.
>itF'rtg EOP:ES-3'TITLE:POST-SGTRCOOLDOWNUSINGBLOWDOWNREV:6PAGE7of10STEPACTION/EXPECTEDRESPONSERESPONSENOTOBTAINED7EstablishRequiredRCSHydrogenConcentration(RefertoS-3.3C,H2OR02REMOVALFROMPRIMARYSYSTEMBYBURPINGVCT)8CheckIfRCSCooldownShouldBeStopped:a.RCScoldlegtemperatures-LESS.a.ReturntoStep3.THAN350'Fb.StopRCScooldown9CheckRupturedS/GNarrowRangeLevel-GREATERTHAN17%[25%adverseCNMT]RefillrupturedS/Gto67%[55%adverseCNMT]usingfeedflow.IFeitherofthefollowingconditionsoccurs,THENstop.feedflowtorupturedS/G:oRupturedS/Gpressuredecreasesinanuncontrolledmanner.-OR-oRupturedS/Gpressureincreasesto1020psig.NOTE:BlowdownfromrupturedS/GmaybestoppedwhenRHRsystemisplacedinservice.10ConsultTSCToDetermineAppropriateProcedureToEstablishBlowdownFromRupturedS/GIFblowdowncanNOTbeinitiated,THENgotoalternatepost-SGTRcooldownprocedure,ES-3.1,POST-SGTRCOOLDOWNUSINGBACKFILL,Step1,ORES-3',POST-SGTRCOOLDOWNUSINGSTEAMDUMP,Step1.
<<ykI~,en EOP:ES-3.2POST-SGTRCOOLDOWNUSINGPLOgDOggREV:6PAGE8of10STEPACTION/EXPECTEDRESPONSERESPONSENOTOBTAINED11ControlRCSMakeupFlowAndLetdownToMaintainPRZRLevel:a.PRZRlevel-GREATERTHAN13$[40%adverseCNMT]b.PRZRlevel-LESSTHAN75%[65%adverseCNMT)a.IncreaseRCSmakeupflowasnecessaryandgotoStep12.b.DecreasesRCSmakeupflowtodecreaselevelandgotoStep13.NOTE:TheupperheadregionmayvoidduringdepressurizationifRCPsarenotrunning.ThismayresultinarapidlyincreasingPRZRlevel.12DepressurizeRCSToMinimizeRCS-To-SecondaryLeakage:a.DepressurizeusingnormalPRZRspraya.IFletdownisinservice,THENdepressurizeusingauxiliarysprayvalve(AOV-296).IFNOT,THENuseonePRZRPORV.b.EnergizePRZRheatersasnecessarycdMaintainRCSpressureatrupturedS/Gpressured.MaintainRCSsubcoolingbasedoncoreexitT/Cs-GREATERTHANO'FUSINGFIGUREMINSUBCOOLING JIPEIIIIIgi1<
P EOP:ES-3'TITLE:POST-SGTRCOOLDOWNUSINGBLOWDOWNREV6PAGE1of1BORONCONCENTRATION(PPM)1800FIGURESDM1600BORONINCREMENTS20PPM140012001000ADEQUATESDM100PPHCONSERVATISHINCLUDED800600400200BURNUPINCREMENTS100HWD/HTU01000200030004000500060007000800090001000011000CYCLE22BURNUP(HWD/HTU)NOTE:Toobtaincoreburnup,usePPCSturnoncodeBURNUP. ~I@IJ4kl~s'I+a~(1 EOP:ES-3.2TITLE:POST-SGTRCOOLDOWNUSINGBLOWDOWNREV:6PAGE1of11.SIREINITIATIONCRITERIAFOLDOUTPAGEIFeitherconditionlistedbelowoccurs,THENoperateSIpumpsmanuallyasnecessaryandgotoECA-3.1,SGTRWITHLOSSOFREACTORCOOLANT-SUBCOOLEDRECOVERYDESIRED,Step1:oRCSsubcoolingbasedoncoreexitT/Cs-LESSTHANO'FUSINGREQUIREMENTSOFFIGUREMINSUBCOOLING.OR2~oPRZRlevel-CHARGINGCANNOTCONTROLLEVELGREATERTHAN54[30%adverseCNMT]SECONDARYINTEGRITYCRITERIAIFanyS/GpressureisdecreasinginanuncontrolledmanneroriscompletelydepressurizedANDhasnotbeen,isolated,THENgotoE-2,FAULTEDS/GISOLATION,Step1.3~COLDLEGRECIRCULATIONSWITCHOVERCRITERION4~IFRWSTleveldecreasestolessthan284,THENgotoES-1.3,TRANSFERTOCOLDLEGRECIRCULATION,Step1.AFWSUPPLYSWITCHOVERCRITERIONIFCSTleveldecreasestolessthan5feet,THENswitchtoalternateAFWwatersupply(RefertoER-AFW.l,ALTERNATEWATERSUPPLYTOAFWPUMPS).