Title of article
AnalysisofthehotgasflowintheoutletplenumoftheveryhightemperaturereactorusingcoupledRELAP5-3DsystemcodeandaCFDcodeOriginalResearchArticle
Author/Authors
NolanAnderson، نويسنده , , YassinHassan، نويسنده , , RichardSchultz، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
6
From page
274
To page
279
Abstract
Theveryhightemperaturereactor(VHTR)systembehaviorshouldbepredictedduringnormaloperatingconditionsandpostulatedaccidentconditions.Theplantaccidentscenarioandthepassivesafetybehaviorshouldbeaccuratelypredicted.Uncertaintiesinpassivesafetybehaviorcouldhavelargeeffectsontheresultingsystemcharacteristics.DuetotheseperformanceissuesintheVHTR,thereisaneedfordevelopment,testingandvalidationofdesigntoolstodemonstratethefeasibilityofthedesignconceptsandguidetheimprovementoftheplantcomponents.Oneoftheidentifieddesignissuesforthegas-cooledreactoristhethermalmixingofthecoolantexitingthecoreintotheoutletplenum.Incompletethermalmixingmaygiverisetothermalstressesinthedownstreamcomponents.Toprovideflowdetails,theanalysispresentedinthispaperwasperformedbycouplingaVHTRmodelgeneratedinathermalhydraulicsystemscodetoacomputationalfluiddynamics(CFD)outletplenummodel.TheoutletconditionsobtainedfromthesystemscodeVHTRmodelprovidetheinletboundaryconditionstotheCFDoutletplenummodel.Bycouplingthetwocodesinthismanner,theimportantthree-dimensionalfloweffectsintheoutletplenumarewellmodeledwhileavoidingmodelingtheentirereactorwithacomputationallyexpensiveCFDcode.Thevaluesofpressure,massflowrateandtemperatureacrossthecoupledboundaryshoweddifferencesoflessthan5%ineverylocationexceptforonechannel.Thecouplingauxiliaryprogramusedinthisanalysiscanbeappliedtomanydifferentcasesrequiringdetailedthree-dimensionalmodelinginasmallportionofthedomain.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895000
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