Title of article
Incorporatingreliabilityanalysisintothedesignofpassivecoolingsystemswithanapplicationtoagas-cooledreactorOriginalResearchArticle
Author/Authors
FranciscoJ.Mackay، نويسنده , , GeorgeE.Apostolakis، نويسنده , , PavelHejzlar، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
12
From page
217
To page
228
Abstract
Atime-dependentreliabilityevaluationofatwo-looppassivedecayheatremoval(DHR)systemwasperformedaspartoftheiterativedesignprocessforahelium-cooledfastreactor.ThesystemwasmodeledusingRELAP5-3D.TheuncertaintiesininputparameterswereassessedandwerepropagatedthroughthemodelusingLatinhypercubesampling.AnimportantfindingwasthediscoverythatthesmallerpressurelossthroughtheDHRheatexchangerthanthroughthecorewouldmaketheflowtobypassthecorethroughoneDHRloop,iftwoloopsoperatedinparallel.ThisfindingisawarningagainstmodelingonlyonelumpedDHRloopandassumingthatnofthemwillremoventimesthedecaypower.Sensitivityanalysesrevealedthattherearevaluesofsomeinputparametersforwhichfailuresareveryunlikely.Thecalculatedconditional(i.e.,giventheLOCA)failureprobabilitywasdeemedtobetoohighleadingtotheidentificationofseveraldesignchangestoimprovesystemreliability.Thisstudyisanexampleofthekindsofinsightsthatcanbeobtainedbyincludingareliabilityassessmentinthedesignprocess.ItisdifferentfromtheusualuseofPSAindesign,whichcomparesdifferentsystemconfigurations,becauseitfocusesonthethermal–hydraulicperformanceofasafetyfunction.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
894996
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