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:0849 ATTACHMENT 1EMERGENCY CORECOOLINGSYSTEMSSURVEILLANCE REUIREMENTS Continued f.Byperforming aflowbalancetestduringshutdownfollowing completion ofmodifications totheECCSsubsystem thatalterthesubsystem flowcharacteristics andverifying thefollowing flowrates:BoronInjection SystemSinlePum"Loop1BoronInjection Flow117.5gpmLoop2BoronInjection Flow117.5gpmLoop3BoronInjection Flow117.5gpmLoop4BoronInjection Flow117.5gpmSafetyInjection SystemSinlePum""Loop1and4ColdLegFlow>300gpmLoop2and3ColdLegFlow>300gpmTheflowrateineachBoronInjection (BI)lineshouldbeadjustedtoprovide117.5gpm(nominal) flowintoeachloop.Undertheseconditions thereiszerominiflowand80gpmsimulated RCPsealinjection lineflow.TheactualflowineachBIlinemaydeviatefromthenominalsolongasthedifference betweenthehighestandlowestflowis10gpmorlessandthetotalflowtothefourbranchlinesdoesnotexceed500gpm.Minimumflow(totalflow)requiredis345.8gpmtothethreemostco(servative (lowestflow)branchlines.TotalSIS(singlepump)flow,including miniflow,'hall notexceed650gpm.8310060329'31003 PDRADOCK05000315PDR0.C.COOK-UNIT13/45-6aAmendment No.

w/J Mr.HaroldR.tonATTACHMENT 2BASISFORTECHNICAL SPECIFICATION CHANGEREQUESTThebasisforchangingtheTechnical Specification isthatwehaveperformed asystemtestanddemonstrated thattheEastpumpwoulddeliver499gpmtotheReactorCoolantSystem(RCS)injection pointswithanadditional 80gpmsimulated reactorcoolantpumpsealinjection flow.Inaddition, wehaveperformed anevaluation ofpumpoperation at580gpmtotalflowunderaccidentconditions, andthatevaluation hasshownthat.therewouldbeadequateNetPositiveSuctionHead(NPSH)forproperpumpoperation atthisflow.Onthisbasis,weconcludethatwiththesysteminitsminimumresistance configuration, theECCSEastchargingpumpwillbeoperableinamannersoastoprecludetotalpumpflowfromexceeding runoutconditions.

Itshouldbenotedthat.inarrivingattheaboveconclusion, therunoutcondition iswiththepumpinthealignment delivering 500gpmtotheRCSinjection pointsandanadditional 80gpmsimulated reactorcoolantpumpsealinjection flow.WithregardtotheWestpump,ourjustification isthatbothpumpsareofsimilardesignandhavesimilarNPSHrequirements.

IftheWestpumpwereallowedtodeliver500gpmtotheinjection points,wewouldanticipate thattherewouldbenoproblemregarding runoutbaseduponourEastpumptestresults,designsimilarity, andourNPSHevaluation.

SincetheonlyitemofconcernwiththischangerequestismaximumECCSchargingpumpflow,andsincebothpumpsdelivertheminimumrequiredECCSflowwiththe'roper flowsplitbetweeninjection points,wealsoconcludethatthisrequested changewillnotaffecttheminimumfloworflowsplitrequirements asdefinedinthebasisforthisTechnical Specification.

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