Title of article
Three-dimensionalsimulationofthecoupledconvective,conductive,andradiativeheattransferduringdecayheatremovalinanHTROriginalResearchArticle
Author/Authors
Jan-PatriceSimoneau، نويسنده , , JulienChampigny، نويسنده , , BrianMays، نويسنده , , LewisLommers، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2007
Pages
15
From page
1923
To page
1937
Abstract
Athree-dimensionalmodelhasbeenconstructedtosimulatethepassiveheatremovalinamodularprismatic-blockhightemperaturereactorduringalossofactivecoolingaccident.Thismodel,developedusingtheSTAR-CDgeneralcomputationalfluiddynamicscode,solvesthecombinedconductive,convective,andradiativeheattransferwithina30°sectionofthecoreandreactorvessel.Toaccommodatethedifferentspatialscales,ituseshomogeneousequivalentmediatorepresentthecoolantflowandtheprismaticfuelblocks.Acustomizedprocedurethatmanagessolvingalternativelythedynamicandthermalfieldspermitsthecomputationofverylongtransients,whichtypicallyareperformedfor100ormorehoursofsimulatedtime.
Theglobalmethodologyandspecificmodelingproceduresareexplained,andkeypointsoftheCFDanalysisarehighlighted.Next,theresultsofseveralcalculationsarepresented,andthephysicalphenomenarepresentedaredescribed.Twocommonlyinvestigatedlossofactivecoolingscenariosareconsidered:depressurizedconductioncooldownandpressurizedconductioncooldown.Theresultsforthesetwoscenariosarecomparedtoassesstheeffectofheattransferviainternalnaturalconvection–whichisnegligibleduringthedepressurizedevent–onthethermalbehaviorofthesystem.Inaddition,theevolutionofthenaturalconvectionflowthroughthecoreandintheannularspacesisexaminedanddiscussed.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2007
Journal title
Nuclear Engineering and Design Eslah
Record number
941372
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