ML17158B150

06/08/2017, Meeting Slides for High Pressure Safety Injection Pump AB Pre-submittal Public Meeting Relief Request Per 50.55a(Z)(2)for Waterford Steam Electric Station, Unit 3 (CAC No. MF9699)

ML17158B150
Person / Time
Site:	Waterford
Issue date:	06/08/2017
From:	Entergy Operations
To:	Pulvirenti A L Plant Licensing Branch IV
Pulvirenti A L, 415-1390
References
CAC MF9699
Download: ML17158B150 (19)

Text

HIGHPRESSURESAFETYINJECTIONPUMPABPRESUBMITTALPUBLICMEETINGRELIEFREQUESTPER50.55a(z)(2)WATERFORD3JUNE8,20171 HPSIABReliefRequestPreSubmittalMeetingIntroductionsJohnJarrell-RegulatoryAssuranceManagerBenSheppard-InServiceTestingEngineerMichelleGroome-SystemsEngineerMariaZamber-RegulatoryAssurance2 HPSIABReliefRequestPreSubmittalMeeting*Overview*AdverseCondition,Testing,andCorrectiveActionRequirements*PreviousReliefRequest*ProblemwithRefurbishment*PumpPerformanceData/Analysis*ProposedAlternative3Agenda Overview*EntergyisrequestingreliefoftherequirementtoperformtheISTComprehensiveTestoftheHPSIABpump.*Testisrequiredtobeperformedata39weekfrequencyduetotherequirement(ISTB6200(a))todoublethefrequencyifaparametervalue(inthiscase,vibration)fallswithintheAlertrange.*HighvibrationnotedduringRF20(Nov2015)andreliefpreviouslygrantedforCycle21.*PumpcouldnotberefurbishedduringRF21,thereforereliefisagainbeingrequestedforCycle22.4 HighPressureSafetyInjectionPumpAB*PumpSIMPMP0002ABistheinstalledspare(maybealignedtoeithertrain).*Safetyrelated,horizontallymounted,ninestage,centrifugalpump.*ManufacturerisIngersollRand(Model4X9C9).*Ratedfor405gpmwith2830feetofheadat3575rpm.*GroupBpump.5 AdverseCondition-HighVibration*ComprehensivePumpTestperformedduringRF20(Nov2015)identifiedhighvibrationinthealertrangeatvibrationpoints3H(inboardbearing)and4H(outboardbearing).*Causeofhighvibrationattributedtobeginningstagesofendoflife.6 TestandCorrectiveActionRequirements*ComprehensivePumpTestrequiredtobeperformedon18monthfrequencyduetolengthofWF3OperatingCycles.*Correctiveactionrequiresthatiftestparametervaluefallswithinalertrange,frequencyshallbedoubleduntilthecauseofthedeviationisdeterminedandtheconditioniscorrected.*Comprehensivetestcanonlybeperformedwhenreactorisshutdown(Mode6).7 PreviousReliefRequest/Precedent*ReliefpreviouslygrantedforWaterford3onJuly6,2016forOperatingCycle21[ML16182A270].*ApprovalgrantedtoperformGroupAtestonaquarterlybasisinordertomonitorvibrationwhileonlineinordertoidentifyiftheconditionwasworsening.*Pumprefurbishmentwasscheduledtobeperformedduringthe21strefuelingoutage(RF21).8 ProblemwithRefurbishment*NewHPSIABshaftdamagedbyfabricatoranddeemedunusable*PumpisuniquetoWaterford3andArkansasNuclearOneandsparematerialsnotavailable.*LeadtimeforanewshaftwasbeyondthestartdateofOperatingCycle22.*Inpreparationforrefurbishment,pumpwasuncoupledfrommotor,thenrecoupledwhenrefurbishmentcouldnotbecompleted.Noadditionalmaintenancewasperformed.9 PumpPerformance*Pumpexhibitssatisfactoryhydraulicperformancewithnodegradingtrend.*TSflowsurveillancerequirementsaresatisfactory.*VibrationmeasurementsobservedduringCycle21GroupAtestingwereelevatedyetacceptable.*AftertheuncouplingandrecouplingofthepumpjustpriortoRF21,thevibrationswerenotedtohavebeenreducedsignificantly,andareofthesamemagnitudeasvibrationmeasurementsrecordedduringthecomprehensivetestofRF21.10 ChangeinVibrationReadingsEngineeringevaluationdeterminedthattheuncouplingandrecouplingperformedatthebeginningoftherefurbishmentattemptaffectedthevibrationreadings;however,thisisnotthemostlikelycauseoftheincreasedvibrationsidentifiedinNovember2015andthereforeEntergycannotsaythattheoriginalconditionhasbeenresolved.DuetothecircumstancespresentedbythefactthattheHPSIABpumpcouldnotberefurbished,theoriginalconditionthatcausedtheelevatedvibrationhasnotbeencorrected.11 HPSIABComprehensiveData12DateOutageFlow Rate (gpm)DP(psid)Pump Bearing Vibrations (in/sec)3H3V4H4V4A10/28/2009RF16404.01202.00.2670.1910.2520.2660.05004/16/2011RF17422.81184.20.2350.1610.2410.2500.05812/18/2012RF18411.01215.00.2490.1660.2260.2340.04904/19/2014RF19411.21190.70.0900.0830.0700.0720.05811/03/2015RF20406.01194.50.3320.1910.3360.2300.08811/23/2015RF20408.51202.20.3970.2250.3990.1790.0784/21/2017RF21411.61194.70.2130.1240.2190.1410.042Note:Alertrangeis0.325<V0.700in/sec HPSIABTSDPSurveillanceData13Cycle 20Cycle 21DateDP (psid)DateDP (psid)06/10/20141491.003/09/20161492.309/09/20141462.006/07/20161466.212/12/20141491.509/09/20161467.403/05/20151466.512/01/20161470.106/02/20151471.603/10/20171474.109/04/20151497.004/07/20171468.5Note:TSrequiresaDPgreaterthanorequalto1429psid.

HPSIABTSFlowSurveillanceData14Note:TSrequiresthatthesumofinjectionlineflowratesshallbe>675gpm.Eachpumpmustperformwithahotlegflowrategreaterthanorequalto436gpmandwithin+/-10%ofcoldlegflow.DateOutageTS 4.5.2(h)Cold Leg Flow(gpm)Cold Leg Flow(gpm)Hot/Cold Leg Flow (gpm)90%Cold Leg FlowHot Leg Flow110%Cold Leg Flow10/28/2009RF16687441.0396.90463.7485.1004/16/2011RF17695466.0419.40455.0512.6012/18/2012RF18706451.0405.00458.0496.0004/19/2014RF19 (Header B)708422.0379.80455.2464.2005/06/2014RF19 (Header A)689459.0413.00441.0505.0011/03/2015RF20 (Header A)680454.0408.60445.0499.4011/23/2015RF20 (Header B)694442.0397.80462.0486.204/21/2017RF21 (Header B)678417.8376.00457.5459.604/21/2017RF21 (Header A)679.8443.5399.2457.9487.8 HPSIABGroupATestData(Cycle21)15DateDP (psid)Pump BearingVibrations3H3V4H4V4A03/09/20161376.20.2780.2200.3100.2920.06206/07/20161347.50.2820.2100.2310.2860.07209/09/20161335.20.2700.2000.2900.2900.07012/01/20161340.50.2600.2000.2400.3000.06003/10/20171336.60.2800.2500.2300.3100.05004/07/20171345.00.1430.1420.1510.2230.050Note:At250gpm,eachHPSIPumpmustachieveaminimumof1312.1psid,whichincludesinstrumentaccuracy,inordertofulfilltherequirementsofDesignBasisCalculationECM05003.

Analysis*PumpdischargeflowhasconsistentlyachievedTSflowrequirements.*PumphasachievedTSDPrequirementsduringeachquarterlysurveillanceduringOperatingCycle20andOperatingCycle21.*PumphasbeenwithinISTComprehensivetestDPacceptancecriteriawithnodegradingtrendinpumphydraulicperformance.16 Conclusion17TheprecedinginformationdemonstratesthateventhoughtheHPSIABpumpisinthebeginningstagesofendoflife,itisremainscapableofperformingitssafetyfunctionforitsmissiontime.

ProposedAlternative18*ReliefwillberequestedtoallowperformanceoftheGroupAtestonaquarterlybasisinlieuoftheComprehensiveTestforthedurationofCycle22,essentiallyidenticaltothereliefgrantedforCycle21.*Datawillbeanalyzedtoensurethattheperformanceisintheexpectedrange,providingassurancethatthepumpwillcontinuetobeoperationallyreadyforthedurationofthecycle.

Closing*ExpectedsubmittaldateisJuly6,2017.*ApprovalrequestedbyFebruary3,2018toensurethatreliefisobtainedpriortothetimethattestingwouldneedtobeperformed,whichis39weeksfollowingtheprevioustestduetotheincreasedtestingfrequencyrequirement.*Thankyouforyourtimeandconsideration.*Questions?19