Title of article
ExperimentalvalidationofthemodifiedlinearscalingmethodologyforscalingECCbypassphenomenainDVIdowncomerOriginalResearchArticle
Author/Authors
H.K.Cho، نويسنده , , B.J.Yun، نويسنده , , C.-H.Song، نويسنده , , G.C.Park، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
13
From page
2310
To page
2322
Abstract
Inthedirectvesselinjection(DVI)systemdowncomer,thedirectemergencycorecoolant(ECC)bypassisactivatedduringtherefloodphaseofalarge-breakloss-of-coolantaccident(LBLOCA)bytheinteractionbetweenthedownward-flowingliquid-filmandthetransversegasflow.DirectECCbypassisreportedlythemajorbypassmechanismofECC,andvariousexperimentshavebeenperformedtoobtaindetailedinformationabouttheECCbypassinaDVIdowncomer.Theseleadtoaproposednewscalingmethodology,named‘modifiedlinearscaling’,whichisexpectedtopreservethephasedistributioninthedowncomerandtheECCbypassphenomena.Inthepresentstudy,modifiedlinearscalingwasexperimentallyvalidatedinair–watertestscomprisingTest21-Doftheupperplenumtestfacility(UPTF).ThecounterparttestsofUPTFTest21-Dwereperformedin1/7.3and1/4.0scalemodelsofaUPTFdowncomer,andthetestresultswerecomparedwiththeexperimentaldataofUPTFTest21-D.TwoimportantparametersofdirectECCbypass–thenormalizedliquid-spreadingwidthonthedowncomerwallandthedirectECCbypassfraction,whichisthefractionofinputwaterbypassedoutthebrokencold-leg–wereconsideredinthevalidation.ThecomparisonrevealedthatthescalingparametersofdirectECCbypassarewellpreservedintheprototypeandreducedmodels,fromwhichweconcludethatthemodifiedlinearscalingmethodologyisappropriatefordesigningareducedtestfacilityandforascalinganalysisofdirectECCbypassintherefloodphaseofanLBLOCA.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
895946
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