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
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
Journal title :
Nuclear Engineering and Design Eslah
