ML17158B150

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

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

Text

HIGHPRESSURESAFETYINJECTIONPUMPAB PRESUBMITTAL PUBLICMEETING RELIEFREQUESTPER50.55a(z)(2)

WATERFORD3 JUNE8,2017 1

HPSIABReliefRequest PreSubmittalMeeting

Introductions

JohnJarrell-RegulatoryAssuranceManager BenSheppard-InServiceTestingEngineer MichelleGroome - SystemsEngineer MariaZamber-RegulatoryAssurance 2

HPSIABReliefRequest PreSubmittalMeeting

• Overview

• AdverseCondition,Testing,andCorrectiveAction Requirements

• PreviousReliefRequest

• ProblemwithRefurbishment

• PumpPerformanceData/Analysis

• ProposedAlternative 3

Agenda

Overview

• Entergyisrequestingreliefoftherequirementtoperformthe ISTComprehensiveTestoftheHPSIABpump.

• Testisrequiredtobeperformedata39weekfrequencydueto therequirement(ISTB6200(a))todoublethefrequencyifa parametervalue(inthiscase,vibration)fallswithintheAlert range.

• HighvibrationnotedduringRF20(Nov2015)andrelief previouslygrantedforCycle21.

• PumpcouldnotberefurbishedduringRF21,thereforereliefis againbeingrequestedforCycle22.

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HighPressureSafetyInjectionPumpAB

• PumpSIMPMP0002ABistheinstalledspare(maybe alignedtoeithertrain).

• Safetyrelated,horizontallymounted,ninestage, centrifugalpump.

• ManufacturerisIngersollRand(Model4X9C9).

• Ratedfor405gpmwith2830feetofheadat3575 rpm.

• GroupBpump.

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AdverseCondition-HighVibration

• ComprehensivePumpTestperformedduring RF20(Nov2015)identifiedhighvibrationinthe alertrangeatvibrationpoints3H(inboard bearing)and4H(outboardbearing).

• Causeofhighvibrationattributedtobeginning stagesofendoflife.

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TestandCorrectiveActionRequirements

• ComprehensivePumpTestrequiredtobeperformed on18monthfrequencyduetolengthofWF3 OperatingCycles.

• Correctiveactionrequiresthatiftestparametervalue fallswithinalertrange,frequencyshallbedoubled untilthecauseofthedeviationisdeterminedandthe conditioniscorrected.

• Comprehensivetestcanonlybeperformedwhen reactorisshutdown(Mode6).

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PreviousReliefRequest/Precedent

• ReliefpreviouslygrantedforWaterford3onJuly6, 2016forOperatingCycle21[ML16182A270].

• ApprovalgrantedtoperformGroupAtestona quarterlybasisinordertomonitorvibrationwhile onlineinordertoidentifyiftheconditionwas worsening.

• Pumprefurbishmentwasscheduledtobe performedduringthe21strefuelingoutage (RF21).

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ProblemwithRefurbishment

• NewHPSIABshaftdamagedbyfabricatorand deemedunusable

• PumpisuniquetoWaterford3andArkansasNuclear Oneandsparematerialsnotavailable.

• Leadtimeforanewshaftwasbeyondthestartdate ofOperatingCycle22.

• Inpreparationforrefurbishment,pumpwas uncoupledfrommotor,thenrecoupledwhen refurbishmentcouldnotbecompleted.Noadditional maintenancewasperformed.

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PumpPerformance

• Pumpexhibitssatisfactoryhydraulicperformancewithno degradingtrend.

• TSflowsurveillancerequirementsaresatisfactory.

• VibrationmeasurementsobservedduringCycle21Group Atestingwereelevatedyetacceptable.

• Aftertheuncouplingandrecouplingofthepumpjust priortoRF21,thevibrationswerenotedtohavebeen reducedsignificantly,andareofthesamemagnitudeas vibrationmeasurementsrecordedduringthe comprehensivetestofRF21.

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ChangeinVibrationReadings Engineeringevaluationdeterminedthatthe uncouplingandrecouplingperformedatthebeginning oftherefurbishmentattemptaffectedthevibration readings;however,thisisnotthemostlikelycauseof theincreasedvibrationsidentifiedinNovember2015 andthereforeEntergycannotsaythattheoriginal conditionhasbeenresolved.Duetothecircumstances presentedbythefactthattheHPSIABpumpcouldnot berefurbished,theoriginalconditionthatcausedthe elevatedvibrationhasnotbeencorrected.

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HPSIABComprehensiveData 12 Date Outage Flow Rate (gpm)

DP (psid)

Pump Bearing Vibrations (in/sec) 3H 3V 4H 4V 4A 10/28/2009 RF16 404.0 1202.0 0.267 0.191 0.252 0.266 0.050 04/16/2011 RF17 422.8 1184.2 0.235 0.161 0.241 0.250 0.058 12/18/2012 RF18 411.0 1215.0 0.249 0.166 0.226 0.234 0.049 04/19/2014 RF19 411.2 1190.7 0.090 0.083 0.070 0.072 0.058 11/03/2015 RF20 406.0 1194.5 0.332 0.191 0.336 0.230 0.088 11/23/2015 RF20 408.5 1202.2 0.397 0.225 0.399 0.179 0.078 4/21/2017 RF21 411.6 1194.7 0.213 0.124 0.219 0.141 0.042 Note:Alertrangeis0.325<V0.700in/sec

HPSIABTSDPSurveillanceData 13 Cycle 20 Cycle 21 Date DP (psid)

Date DP (psid) 06/10/2014 1491.0 03/09/2016 1492.3 09/09/2014 1462.0 06/07/2016 1466.2 12/12/2014 1491.5 09/09/2016 1467.4 03/05/2015 1466.5 12/01/2016 1470.1 06/02/2015 1471.6 03/10/2017 1474.1 09/04/2015 1497.0 04/07/2017 1468.5 Note:TSrequiresaDPgreaterthanorequalto1429psid.

HPSIABTSFlowSurveillanceData 14 Note:TSrequiresthatthesumofinjectionlineflowratesshallbe> 675gpm.Eachpump mustperformwithahotlegflowrategreaterthanorequalto436gpmandwithin+/-10%ofcoldlegflow.

Date Outage TS 4.5.2(h)

Cold Leg Flow (gpm)

Cold Leg Flow (gpm)

Hot/Cold Leg Flow (gpm) 90%

Cold Leg Flow Hot Leg Flow 110%

Cold Leg Flow 10/28/2009 RF16 687 441.0 396.90 463.7 485.10 04/16/2011 RF17 695 466.0 419.40 455.0 512.60 12/18/2012 RF18 706 451.0 405.00 458.0 496.00 04/19/2014 RF19 (Header B) 708 422.0 379.80 455.2 464.20 05/06/2014 RF19 (Header A) 689 459.0 413.00 441.0 505.00 11/03/2015 RF20 (Header A) 680 454.0 408.60 445.0 499.40 11/23/2015 RF20 (Header B) 694 442.0 397.80 462.0 486.20 4/21/2017 RF21 (Header B) 678 417.8 376.00 457.5 459.60 4/21/2017 RF21 (Header A) 679.8 443.5 399.2 457.9 487.8

HPSIABGroupATestData(Cycle21) 15 Date DP (psid)

Pump Bearing Vibrations 3H 3V 4H 4V 4A 03/09/2016 1376.2 0.278 0.220 0.310 0.292 0.062 06/07/2016 1347.5 0.282 0.210 0.231 0.286 0.072 09/09/2016 1335.2 0.270 0.200 0.290 0.290 0.070 12/01/2016 1340.5 0.260 0.200 0.240 0.300 0.060 03/10/2017 1336.6 0.280 0.250 0.230 0.310 0.050 04/07/2017 1345.0 0.143 0.142 0.151 0.223 0.050 Note:At250gpm,eachHPSIPumpmustachieveaminimumof1312.1psid,whichincludesinstrument accuracy,inordertofulfilltherequirementsofDesignBasisCalculationECM05003.

Analysis

• Pumpdischargeflowhasconsistentlyachieved TSflowrequirements.

• PumphasachievedTSDPrequirementsduring eachquarterlysurveillanceduringOperating Cycle20andOperatingCycle21.

• PumphasbeenwithinISTComprehensivetest DPacceptancecriteriawithnodegradingtrend inpumphydraulicperformance.

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Conclusion 17 Theprecedinginformationdemonstrates thateventhoughtheHPSIABpumpisinthe beginningstagesofendoflife,itisremains capableofperformingitssafetyfunctionfor itsmissiontime.

ProposedAlternative 18

• Reliefwillberequestedtoallowperformanceof theGroupAtestonaquarterlybasisinlieuof theComprehensiveTestforthedurationofCycle 22,essentiallyidenticaltothereliefgrantedfor Cycle21.

• Datawillbeanalyzedtoensurethatthe performanceisintheexpectedrange,providing assurancethatthepumpwillcontinuetobe operationallyreadyforthedurationofthecycle.

Closing

• ExpectedsubmittaldateisJuly6,2017.

• ApprovalrequestedbyFebruary3,2018to ensurethatreliefisobtainedpriortothetime thattestingwouldneedtobeperformed,which is39weeksfollowingtheprevioustestdueto theincreasedtestingfrequencyrequirement.

• Thankyouforyourtimeandconsideration.

• Questions?

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