ML17325A256

Trip Rept of 870714-15 Visit to Plant Re Pump & Valve Inservice Testing Program.List of Attendees Encl

ML17325A256
Person / Time
Site:	Cook
Issue date:	07/23/1987
From:	MONNIE D I, RANSOM C B EG&G IDAHO, INC.
To:	MCLELLAN T K NRC
Shared Package
ML17325A255	List: ML17325A256
References
NUDOCS 8708130058
Download: ML17325A256 (21)

Text

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idahoFOAMfogG<50A(Rev.0584)NOTEGRAMWevalueinnovation.

July23,1987TO:T.K.McLellanORG:NRC/EMEBFROM:ORG:D.I.Monni@SI&C.B.Ransom~EGBG/Mechani calSystemsEvaluations ADDRESS:Bethesda, MDADDRESS:IdahoFalls,IDTRIPREPORTFORTHEPUMPANDVALVEINSERVICE TESTINGPROGRAMWORKINGMEETINGFORTHED.C.COOKNUCLEARPOWERSTATIONUNITS1AND2OnJuly14and15,1987,aworkingmeetingwasheldattheD.C.CookNuclearPowerStationwiththeAmericanElectricPowerServiceCorporation, NRC,andEG&GIdaho,Inc.,representatives todiscussthequestions resulting fromthereviewoftheD.C.CookNuclearPowerStation,Units1and2,pumpandvalveinservice testing(IST)programs.

Attachedisalistofthemeetingattendees, thequestions thatservedasanagendaforthemeeting,andtheresponses tothosequestions astakenfromthemeetingminutes.Theutilityrepresentatives weregivenabriefintroduction outlining theagendaandthemethodsusedforthedocumentation ofquestions andresponses.

Thiswasfollowedbydetaileddiscussions concerning specificpumpsandvalvesintheD.C.CookNuclearPowerStation,Units1and2,programs.

Thosediscussions resultedinoneopenitemfortheNRCstaff.Theopenitemisspecifically identified inthistripreport.Jm

Attachment:

AsStatedE.-.-dH.L.Magleby+fanC.F.Obenchain H.C.Rockhold<7OeiSOOGS 85000Sa5870806PDRADOCV0PDR.-...P ATTENDANCE LIST-INSERVICE TESTINGPROGRAMWORKINGMEETINGPlant:D.C.CookNuclearPowerStation,Units1and2Dates:July14and15,1987NameTerryPostlewait MaryM.TerryT.K.McLellanTedSullivanDarrellMonnieClairRansomT.L.CookD.L.Wigginton B.A.SvenssonT.R.StephensScottRichardson DavidClimerRogerRickmanLouGibsonJimKobyraEdGilabertDilipVadodaria JimFeinstein N.P.AlexichD.J.MoellenKarlJ.TothClairMangesSatyanSharmaReresentinISMCookISMCookNRCNNRRNRCKNRREG&GIdahoEG&GIdahoEG&GIdahoNRCNNRRISNCookISMCookI&MCookISNCookISNCookISNCookAEPSCAEPSCAEPSCAEPSCAEPSCAEPSCAEPSCAEPSCAEPSC WORKINGMEETINGMINUTESD.C.COOKNUCLEARPOWERSTATION,UNITS1AND2JULY14AND15,1987 D.C.COOKNUCL'EARPOWERSTATION,UNITS1AND2PUMPANDVALVEINSERVICE TESTINGPROGRAMQUESTIONS,

COMMENTS, ANDRESOLUTIONS 1.VALVETESTINGPROGRAMA.GeneraluestionsandComments1.ListanyvalvesthatareAppendixJ,TypeC,leakratetestedthatarenotincludedintheD.C.CookISTprograms?

Resolution:

Allvalves,exceptthoseexcludedbyIWV-1200, thatareAppendixJ,TypeC,leakratetestedareincludedintheD.C.CookISTprogram.2.Theentryinthetestmodecolumnofthevalvelistingtableisoftenmisleading becauseitdoesnotalwaysreflectthefrequency atwhichtheCodetestingrequirements arebeingmet(asanexample,listinga"P"fortestingduringpoweroperations whenavalveisbeingpartial-stroke exercised quarterly andfull-stroke exercised duringrefueling outagesleadsapersontobelievethatthetestingiscompleted quarterly, wheninactuality itisnotcompleted untiltherefueling outage).Resolution:

Procedures arepreparedforthedetailedtesting.Theseprocedures identifytherequiredtestingandtheassociated testingfrequency.

3.HowdoestheSLT-1seatleakagetestdifferfromtheleak'ratetestingrequirements ofSectionXI,Paragraph IWV-3420?

Resolution:

TheSLT-1testingdesignation referstotestingasperSectionXIrequirements.

Thetechnical specifications identifyasPIVsthesamefourvalvesidentified inthefirst10-yearISTprogram.4.HasTestingProcedure No.12THP-4030-STP-237 beenapprovedbytheNRCstafftobeusedinlieuoftheAppendixJtestingforthosevalvesidentified fortheSLT-2Aseatleakagetest?Resolution:

Theprocedure haspreviously beenapprovedbyNRC.Theprocedure willbedescribed intherevisedISTprogramandthehistoryofprocedure approvalwi11bedescribed.

5.TestmethodEF-8isidentified tobeperformed onacoldshutdownfrequency intheintroduction, however,inthevalvelistingtableitissometimes identified forarefueling outagefrequency.

Resolution:

Thedefinition ofEF-8willbemodifiedtoincluderefueling outagefrequency.

6.Whatcriteriaisutilizedforassigning limitingvaluesoffull-stroke timeforpoweroperatedvalves?Resolution:

Thedesigndata,manufacturers dataandFSARrequirements havebeenreviewedandfactoredintotheprogram.Theaverageof4stroketimeswasdetermined foravalve.Thelimitingstroketimeis150%oftheaveragetimewhichismorerestrictive thanthecodeforvalvesthataretrended.

Designated fastactingvalveswithlessthana2secondstroketimearenottrendedandaretreatedasfastactingvalvesaspertheNRCmethodforfastactingvalves.Thelicenseewillprovideasummaryofthecriteriausedforassigning limitingvaluesofthefull-stroke timeintheISTprogramresubmittal.

B.MainSteamSstem1.Whatpercentage ofthesteamflowrequiredthroughvalvesMS-108-2and-3fortheturbinedrivenauxiliary feedwater pumptopump900gpmintothesteamgenerators atoperating pressures isneededtopump700gpmthroughthepumptestflowpath?Onwhatbasisisthispartialflowtestconsidered sufficient toverifythefull-stroke capability ofthesevalves(refertomainsteamsystemNote2)?Resolution:

Ninetypercentofthedesignsteamflowisneededtopump700gpm.Thereliefrequestwillbemodifiedtoprovideamoredetailedjustification andbasisfortheimpracticality offull-stroke exercising thevalves.2.Radiography maybeanacceptable alternate testingmethodtodetermine valvediskposition, however,thereviewers arenotawareofamethodoftestingbyradiography thatprovidesareasonable assuranceofthereverseflowclosurecapability ofcheckvalvesthatperformasafetyfunctionintheclosedposition.

Howcanradiography beusedtoassurethereverseflowcapability ofvalvesMS-108-2and-3?Resolution:

Thelicenseewillprovideadetailedjustification tosupporttheuseofradiography toprovideassurance ofvalvefull-stroking.

Also,thelicenseewilldescribethemethod usedtosamplethevalvesandgroupthevalvesfordisassembly.

C.Feedwater Sstem1.Whatflowrateisestablished throughthepumptestflowpathsduringthequarterly testingofthemotordrivenauxiliary feedwater pumps?WhatisthedesignaccidentflowratethroughcheckvalvesFW-124and-128?Resolution:

Greaterthandesignaccidentflowisestablished duringtesting.2.Howisitverifiedthatsufficient flowpa'ssesthroughvalvesFW-153and-160tofull-stroke themopenwithflowquarterly?

Resolution:

Apressuredecreaseisusedtodetermine thatflowisestablished inthemini-flow linc'hetestmethodfor.strokingthevalveswillbedescribed intheISTprogram.3.Whatisthesafetyrelatedfunctionofvalve12-CRV-51?

Re'solution:

TheIST,.programwillbeamendedtoshowthevalvesafetyfunctionisclosedanditwillbetestedasperCoderequirements.

4TheNRCstaffpositionisthatverification ofthemaximumflowratethroughacheckvalveidentified inanyoftheplant'ssafetyanalyseswouldbeanadequatedemonstration ofthefull-stroke capability ofthevalve.Provideadetailed technical justification whythiscannotbedonetoquarterly full-stroke exercisevalvesFW-134and-135.Resolution:

Thelicenseewillprovideadditional justification fornottestingthesevalvesasperSectionXIrequirements.

5~Iscredittakenforthereverseflowclosureofanyofthecheckvalvesintheflowpathsoftheauxiliary feedwater pumpstothesteamgenerators?

Ifso,howarethesevalvesindividually verifiedtoclose?Resolution:

Thetemperature oftheauxiliary feedlineismonitored todetermine valveclosureatleastquarterly.

Thismethodwillbedescribed intheISTprogramandtheclosedsafetyfunctionoftheappropriate valveswillbeidentified thataretestedusingthismethod.D.Essential ServiceWaterSstemIfvalvesESW-101Eand-101Wperformasafetyfunctionintheclosedpositiontopreventreverseflowthroughanidlepump,theymustbetestedtotheclosedpositiontoverifytheirabilitytoperformthatfunction.

Resolution:

TheESWtrainsarenotcross-connected andfurtherinformation isnotrequired.

E.ReactorCoolantSstem1.Provideamoredetailedtechnical justification fornotexercising valvesNS0-021,-022,-023,and-024duringcoldshutdowns.

Resolution:

Justification willbeprovidedintheISTprogramfornottestingthesevalvesduringcoldshutdowns.

2.Provideamoredetailedtechnical justification fornotexercising valvesNS0-061,-062,-063,and-064duringcoldshutdowns.

Resolution:

SameasItemE.1exceptthereferenced information inthetechnical specification willbeincludedintheISTprogram.F.ChemicalandVolumeControlSsteml.Explainhowradiography canbeusedtoverifyreverseflowclosureofcheckvalveCS-292.Resolution:

Justification forusingradiography totestthisvalvewillbeprovidedin'theISTprogram.Aradiograph ofthisvalvewasexamined.

Theradiograph showedthatthevalvewasintheclosedpositionandthusprovidedvisualobservation ofvalveclosure.2.WhatisthesafetyfunctionofcontrolvalvesHARV-200and-251?TheNRCstaffpositionisthatrequestsforreliefwillnotbe

evaluated forvalvesthatdonotperformasafetyrelatedfunction.

Resolution:

Valves(}RV-200and-251areusedforemergency borationinModes5and6andshouldbeintheISTprogram.Note7forvalvesgMO-200and-201willbecorrected intheISTprogram.

ThefunctionofvalvesHARV-200and-251willbereevaluated andNotes8and9maybedeleted.Ifthesenotesaren'tdeletedtheywillbemodifiedtoshowimpracticality oftesting.G.PostAccidentSamlinSsteml.UnlessvalveNS-283isverifiedintheclosedpositionduringthequarterly exercising test,reliefisstillrequiredfromtheSectionXIrequirement tofull-stroke exercisethischeckvalvequarterly.

Resolution:

Thevalvelistwillberevisedtoshowthatreliefisrequested.

Inaddition, closuretestingofothercheckvalveswillbereviewedtoseethatreliefisbeingrequested asappropriate andincludedintheISTprogram.H.EmerencCoreCoolinSstem1.IfvalvesIM0-51,-52,-53,and-54areeverrequiredtochangepositiontoaccomplish aspecificfunction, theyarenotpassiveandmustbeexercised inaccordance withtheCode.Resolution:

Thesevalvesarepassiveand,therefore, neednotbeincludedintheprogram.

2.TheuseofIWV-3416inemergency corecoolingNote2forvalvesIMO-128andICM-129isnotappropriate sincetheRHRsystemisnotoutofserviceduringpoweroperations.

Anadequatejustification isprovidedinthenotewhichdemonstrates theimpracticality ofexercising thesevalvesduringpoweroperations andtheyshould,therefore, beexercised onacoldshutdownfrequency asprovidedforintheCode.Resolution:

ThelastsentenceinNote2willbedeletedtoeliminate reference toIWV-3416.

Thenotewillbemodifiedtoidentifyandjustifyvalvetestingduringshutdown.

3.If.valveN-102isopenedduringpoweroperations toaddnitrogentothesafetyinjection accumulators, thenitisnotapassivevalveandshouldbetestedtotherequirements ofIW-3520unlessreliefisrequested fromtheCoderequirements.

Resolution:

Thisisanactivevalveandareliefrequestwillbeprovidedforexercising thevalve.4.IfanycreditistakenforclosingvalvesIM0-110,-120,-130,and-140inordertoallowthereduction ofRCSpressuretopermittheRHRsystemtobeplacedintooperation intherecirculation mode,theyperformanactivesafetyfunctionandshouldbeincludedintheISTprogram.Resolution:

ThisisanopenitemfortheNRCtodetermine whetherthesevalvesmustbeincludedintheprogramasactivevalves.

5.Iscredittakeninanyaccidentanalysisforshiftinglowpressuresafetyinjection (RHR)pumpsuctionfromtherefueling waterstoragetanktothecontainment recirculation sump?Ifso,valveIMO-390performsanactivesafetyfunctiontoisolatethesuctionfromtheRWSTandshouldbetestedinaccordance withtheCode.Resolution:

ValvesIMO-310and-320arerequiredtocloseandisolatethepumpsuctionfromtheRWST,therefore, IMO-390doesnothavetobeintheprogram.6..Havesystemmodifications beenperformed toallowfull-stroke exercising checkvalveSI-148inaccordance withtheCodewithoutjeopardizing theavailability ofothersafetysystems?Resolution:

Thelicenseewillrewritethebasisforrequesting reliefandwillincludeintheresubmittal theresolution oftheairentrainment problemidentified intheSERforthefirst10-yearinterval.

7.Provideamoredetailedtechnical justification fornotfull-stroke exercising valvesSI-158-L1,

-L2,-L3,and-L4duringcoldshutdowns.

Resolution:

Thelicenseewilladdajustification fornotfull-stroking thesevalvesduringcoldshutdowntoNote12.8.Provideamoredetailedtechnical justification fornotfull-stroke exercising valvesSI-161-L1,

-L2,-L3,and-L4duringcoldshutdowns.

Resolution:

SameasItemH.7.9.Providethedetailedtechnical justification fornotfullorpartial-stroke exercising valvesSI-170-L1,

-L2,-L3,and-L4eitherquarterly duringpoweroperations orduringcoldshutdowns.

Resolution:

Thelicenseewillprovideamoredetailedjustification including identifying partial-stroking duringcoldshutdown.

10.IfvalvesICM-311and-321areeverrequiredtochangepositiontoaccomplish aspecificfunction, theyarenotpassiveandmustbeexercised inaccordance withtheCode.Resolution:

Thesevalvesdonothavetochangeposition, arepassive,anddonothavetobeincludedintheprogram.I.Containment SraSstem1.TheNRCstaffhasconcluded thatavalvesampledisassembly andinspection utilizing amanualfull-stroke exerciseofthevalvediskisanacceptable methodtoverifyacheckvalve'sfull-stroke capability.

Thisprograminvolvesgroupingsimilarvalvestogetherandtestingonevalveineachgroupduringeachrefueling outage.Thesamplingtechnique requiresthateachvalveinthegroupbeofthesamedesign(manufacturer, size,modelnumberandmaterials ofconstruction) andhavethesameserviceconditions.

Additionally, ateachdisassembly itmustbeverifiedthatthedisassembled valveiscapableoffull-stroking andthatitsinternals arestructurally sound(nolooseorcorrodedparts).10 Adifferent valveofeachgroupisrequiredtobedisassembled, inspected andmanuallyfull-stroke exercised ateachrefueling outage,untiltheentiregrouphasbeentested.Ifitisfoundthatthedisassembled valve'sfull-stroke capability isinquestion, theremainder ofthevalvesinthatgroupmustalsobedisassembled, inspected andmanuallyfull-stroke exercisedduringthesameoutage.ArevalvesCTS-103E,

-103W,-138E,and-138Wgroupedtogetherforsampledisassembly andinspection?

,Thesevalvesdonotappeartomeet,theNRCstaff'scriteriaforgroupingasexplained above.Resolution:

Thelicenseewilleithersample,group,inspect,anddisassemble valvesasperthestatedNRCpositionorjustifyadeviation fromthisposition.

2.ArevalvesCTS-127E,

-127W,-131E,and-131W,andvalvesRH-141and-142groupedtogetherforsampledisassembly andinspection?

ThesevalvesdonotappeartomeettheNRCstaff'scriteriaforgroupingasexplained inguestionI.1above.Resolution:

SameasItemI.l.J.WeldChannelPressurization Sstem1.IfvalvesCA-181-Nand-Sareopenedduringpoweroperations, thentheyarenotpassivevalvesandshouldbetestedtotherequirements ofIWV-3520unlessreliefisrequested fromtheCoderequirements.

11 Resolution:

Thesevalvesarenotopenedduringpoweroperation andarepassiveandneednotbeexercised.

K.IceCondenser RefrierationSstem1.UnlessvalvesR-156and-157areverifiedintheclosedpositionduringthequarterly exercising test,reliefisstillrequiredfromtheSectionXIrequirement tofull-stroke exercisethesecheckvalvesquarterly.

Resolution:

Thevalvelistwillbechangedtoindicatereliefisbeingrequested andthebasisforreliefwillbemodifiedtoincludeadditional technical justifications L.EmerencDieselGenerator Subsstems1.Provideamoredetailedtechnical justification fornotmeasuring thestroketimesforthefollowing valvesquarterly duringpoweroperations.

Explainhowtheproposedtestingindividually verifiestheoperability ofthesevalves.Dothesevalveshaverequiredfail-safe positions?

XRV-220XRV-225XRV-221XRV-226XRV-222XRV-227Resolution:

Thelicenseewillprovideamoredetailedtechnical justification fornotmeasuring thestroketimeofthesevalves.Thelicenseewillreviewthefail-safe positionofthesevalvesand,ifappropriate, provideareliefrequestfornotfail-safe testingthesevalves.12

2.Reviewthesafetyrelatedfunctionofvalves2-DG-102C and-104C(P8ID2-5151D-26 coordinates H-4andF-4)todetermine iftheyshouldbeincludedintheISTprogram.Resolution:

Thesevalveswillbeincludedinthelicensee's ISTprogram.N.ComressedAirSstem1.Whataretheconsequences oflossofcontainment controlairthatmakethequarterly testingofvalvesXCR-100,-101,-102,and-103impractical?

Resolution:Thelicenseewillprovideamoredetailedtechnical justification thatshowsthatfull-stroking thesevalvesduringpoweroperation isimpractical andwillincludeadiscussion oftheconsequences oflossofcontainment controlairduringoperation.

'.BoronNake-uSsteml.IfvalvesCS-415-1,

-2,'-3,and-4performasafetyfunctionintheclosedpositiontopreventreverseflowthroughanidleboricacidtransferpump,theymustbetestedtotheclosedpositiontoverifytheirabilitytoperformthatfunction.

Resolution:

Thesevalvesdonothaveasafetyfunctionintheclosedpositionand,therefore, donothavetobetestedtotheclosedposition.

13 0.SentfuelPitCoolinandClean-uSstem1.IfvalvesSF-118NandSperformasafetyfunctionintheclosedpositiontopreventreverseflowthroughanidlespentfuelpitpump,theymustbetestedtotheclosedpositiontoverifytheirabilitytoperformthatfunction.

Resolution:

Thesevalvesdonothaveasafetyfunctionintheclosedpositionbecausesufficient waterwillpassthroughtheheatexchanger priortoreturning tothefuelstoragepool.P.HDSVentsandDrainsSstem1.Provideamoredetailedtechnical justification fornotexercising valveN-160duringcoldshutdowns.

Resolution:

Thelicenseewillprovidejustification fortestingthisvalveduringcoldshutdowns.

(}.PALSamlinandInstrumentation Sstem1.Reduction ofredundancy isnotanadequatejustification fornotperforming theCoderequiredtesting;howlongcanoneofthelowercontainment radiation monitortrainsbeinoperable beforeactionmustbetaken?Resolution:

Theinletvalveswillbetestedaspertherequirements ofSectionÃIandreliefwillberequested forthevalveinthecommonreturnline.Bothtrainsarenotrequiredtobeincontinuous operation bythetechnical specifications asthereisa30dayLCO.Also,additional justification willbeprovidedinthereliefrequestforvalveSM-1.

2.PUMPTESTINGPROGRAM1.Lackofinstalled instrumentation isnotanadequatejustification fornotmeasuring thepumpflowrateforthespentpoolpitcoolingpumps(refertopumpCodeReliefRequestIII).Provideamoredetailedtechnical justification fornotmeasuring thisCoderequiredparameter toallowthedetection ofpumpdegradation.

Resolution:

Moredetailedjustification willbeincludedinthereliefrequest.15