Title of article
HeatandfissionproducttransportinmoltencorematerialpoolwithcrustOriginalResearchArticle
Author/Authors
J.I.Yun، نويسنده , , K.Y.Suh، نويسنده , , C.S.Kang، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
11
From page
2171
To page
2181
Abstract
Heattransferandfluidflowinamoltenpoolareinfluencedbyinternalvolumetricheatgeneratedfromtheradioactivedecayoffissionproductspeciesretainedinthereactorvesselduringasevereaccident.Thepoolsuperheatisdeterminedbasedontheoverallenergybalancethatequatestheheatproductionratetotheheatlossrate.Decayheatoffissionproductsinthepoolisestimatedbyproductofthemassconcentrationandenergyconversionfactorofeachfissionproduct.Twenty-nineelementsarechosenandclassifiedbytheirchemicalpropertiestocalculateheatgenerationrateinthepool.ThemassconcentrationofafissionproductisobtainedfromreleasedfractionandthetabularoutputoftheORIGEN2code.TheinitialcoreandpoolinventoriesateachtimecanalsobeestimatedusingORIGEN2.Thereleasedfractionofeachfissionproductiscalculatedbasedonthebubbledynamicsandmasstransport.NumericalanalysisisperformedforheatandfissionproducttransportinamoltencorematerialpoolduringtheThreeMileIslandUnit2(TMI-2)accident.Thepoolisassumedtobeapartiallyfilledhemisphere,whosechangeingeometryisneglectedduringthenumericalcalculation.Calculatedresultsindicatethatthepeaktemperatureinthemoltenpoolissignificantlylowered,sinceasubstantialamountofthevolatilefissionproductsisreleasedfromthemoltenpoolduringprogressionoftheaccident.Theresultsmaydirectlybeappliedtotheexistingsevereaccidentanalysiscodestomoremechanisticallydeterminethethermalloadtothereactorvessellowerheadduringthein-vesselretention.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
895936
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