ML17320A760

Proposed Tech Spec Re ECCS

ML17320A760
Person / Time
Site:	Cook
Issue date:	10/03/1983
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17320A757	List: ML17320A756 ML17320A760
References
AEP:NRC:0849, AEP:NRC:849, NUDOCS 8310060329
Download: ML17320A760 (4)

Text

Mr.Haro1dR.DentonAEP:NRC:0849ATTACHMENT1EMERGENCYCORECOOLINGSYSTEMSSURVEILLANCEREUIREMENTSContinuedf.ByperformingaflowbalancetestduringshutdownfollowingcompletionofmodificationstotheECCSsubsystemthatalterthesubsystemflowcharacteristicsandverifyingthefollowingflowrates:BoronInjectionSystemSinlePum"Loop1BoronInjectionFlow117.5gpmLoop2BoronInjectionFlow117.5gpmLoop3BoronInjectionFlow117.5gpmLoop4BoronInjectionFlow117.5gpmSafetyInjectionSystemSinlePum""Loop1and4ColdLegFlow>300gpmLoop2and3ColdLegFlow>300gpmTheflowrateineachBoronInjection(BI)lineshouldbeadjustedtoprovide117.5gpm(nominal)flowintoeachloop.Undertheseconditionsthereiszerominiflowand80gpmsimulatedRCPsealinjectionlineflow.TheactualflowineachBIlinemaydeviatefromthenominalsolongasthedifferencebetweenthehighestandlowestflowis10gpmorlessandthetotalflowtothefourbranchlinesdoesnotexceed500gpm.Minimumflow(totalflow)requiredis345.8gpmtothethreemostco(servative(lowestflow)branchlines.TotalSIS(singlepump)flow,includingminiflow,'hallnotexceed650gpm.8310060329'31003PDRADOCK05000315PDR0.C.COOK-UNIT13/45-6aAmendmentNo.

w/J Mr.HaroldR.tonATTACHMENT2BASISFORTECHNICALSPECIFICATIONCHANGEREQUESTThebasisforchangingtheTechnicalSpecificationisthatwehaveperformedasystemtestanddemonstratedthattheEastpumpwoulddeliver499gpmtotheReactorCoolantSystem(RCS)injectionpointswithanadditional80gpmsimulatedreactorcoolantpumpsealinjectionflow.Inaddition,wehaveperformedanevaluationofpumpoperationat580gpmtotalflowunderaccidentconditions,andthatevaluationhasshownthat.therewouldbeadequateNetPositiveSuctionHead(NPSH)forproperpumpoperationatthisflow.Onthisbasis,weconcludethatwiththesysteminitsminimumresistanceconfiguration,theECCSEastchargingpumpwillbeoperableinamannersoastoprecludetotalpumpflowfromexceedingrunoutconditions.Itshouldbenotedthat.inarrivingattheaboveconclusion,therunoutconditioniswiththepumpinthealignmentdelivering500gpmtotheRCSinjectionpointsandanadditional80gpmsimulatedreactorcoolantpumpsealinjectionflow.WithregardtotheWestpump,ourjustificationisthatbothpumpsareofsimilardesignandhavesimilarNPSHrequirements.IftheWestpumpwereallowedtodeliver500gpmtotheinjectionpoints,wewouldanticipatethattherewouldbenoproblemregardingrunoutbaseduponourEastpumptestresults,designsimilarity,andourNPSHevaluation.SincetheonlyitemofconcernwiththischangerequestismaximumECCSchargingpumpflow,andsincebothpumpsdelivertheminimumrequiredECCSflowwiththe'roperflowsplitbetweeninjectionpoints,wealsoconcludethatthisrequestedchangewillnotaffecttheminimumfloworflowsplitrequirementsasdefinedinthebasisforthisTechnicalSpecification.

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