ML17266A011

LER 78-038/01T-0 on 780925,input Error Made to ECCS Analysis Re Containment Spray Flow.Caused by Ambiguous Data Supplied by Ae.Amend to Cycle 2 ECCS Analysis Will Be Issued Shortly

ML17266A011
Person / Time
Site:	Saint Lucie
Issue date:	10/05/1978
From:	SCHOPPMAN M A FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17266A010	List: ML17266A009 ML17266A011
References
LER-78-038-01T, LER-78-38-1T, NUDOCS 7810170245
Download: ML17266A011 (2)

Text

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'HQ~RQ818L5QH58CU8lCK!(>QfDurinreviewoftheECCSparameters fortheCycle3reloadsafety~0.)analvsisitwasdeterminded that'anerrorhadbeenmadeintheinputL-'otheSt.LucieECCSanalsisconcerning thecontainment sprayflowrate.))TheNSSSvendorerformedareanalysis forCycle2usingthecorrected spraypumpflow.Thereanalysis onthisitemconfirmsthatSt.Lucie1'oesnotexceedtheAppendixKlimit.5<<sftVLestLilslOLI~ski,<<iOicl50$COlCLI40vtvf00$'CLLSLJO~CaQ~.1III)IJ'.5'$550Vtisflkl.

OCVRSSVCS1$401TSlvislOis SvtIvt414$404TVO9's~!~7I8~~038~~~01~T)8)I)$)0tiStLTLC4LSTVTVSSOVSSSVtviVPislisf~LOII4$s)sls~sLI~~0IIO1VS~Ass<<iVLVV~41'-"Sl-0I-'ISLJS"'::~C4)<<RU55Q85Sl~lQHkHQCQRRsc~lvtRC~IQss5+o'hecauseoftheincorrectlv assumedCSPflowratewasduetoambiuousdatasuppliedbytheAE.WehavereviewedtheECCSparameters fortheCcle2reloadsafetyanalysistoensurethatallinputtotheanalsisiscorrect.Anamendment totheCycle2ECCSanalysiswillbel~LcswsOTVSRSTLms 9NA5LI'SII)<<ssl1'C~lLCIvlfvC<<Ovf)'vT

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~I~l30'52-3802 ICSJIIRCAtP.l.~II~IlI REPORTABLE OCCURRENCE 335-78-38 LICENSEEEVENTREPORTPAGETWOADDITIONAL EYENTDESCRIPTION DuringreviewoftheECCSparameters fortheCycle3reloadsafetyanalysis, itwasdetermined thatanerrorhadbeenmadeintheinputtotheSt.LucieECCSanalysisconcerning thecontainment sprayflowrate.TheflowrateusedwasthevalueforIpump,nottherequired2-pumpflowrate.Toevaluatetheimpactofthiserror,ananalysiswasperformed forCycle2bytheNSSSvendorusinp,thecorrected spraypumpflow.Lhereas,thepriorECCSanalyseshasusedrefloodheattransfercoefficients derivedfromCOHPRERC-II baseduponspraypumpflowof3375gpmandaPeakLinearHeatGeneration Rate(PLHGR)ofl7.0kw/ft,thenewanalysisusedrefloodheattransfercoefficients basedonaspraypumpflowof6750gpmandthecurrentPLHGRTechnical Specification limitof14.8kw/ft.IneachcasethePeakCladTemperature (PCT)wasdetermined usingSTRIKIN-II withaPLHGRofl4.8kw/ftandtherespective refloodheattransfercoeffici-ents.Theincreaseinrefloodheattransfercoefficients resulting fromthE.reduction inPLHGRfroml7.0to14.8kw/ftmorethanoffsetanydecreaseinheattransfercoefficients duetothedoublingofspraypumpflow.AsaresultthePCTcalculated bySTRIKIN-II decreased fromthevalueof2035Fdetermined forCycle2toarevisedvalueof2022F.00Thiscompletes therenalysis onthisitemandconfirmsthatSt.LucjedoesnotexceedtheAppendixKlimit.