Title of article :
EvaluationofintentionaldepressurizationstrategyinChinese600MWePWRNPPOriginalResearchArticle
Author/Authors :
K.Zhang، نويسنده , , X.W.Cao، نويسنده , , J.Deng، نويسنده , , Z.Wang، نويسنده , , L.C.Guo، نويسنده , , D.Q.Guo، نويسنده , , J.T.Yuan، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Intentionaldepressurizationisoneoftheeffectivestrategiesinpreventinghigh-pressuremeltejection(HPME)anddirectcontainmentheating(DCH),whichismostfeasiblefortheoperatingnuclearpowerplants(NPPs)inChina.InordertoevaluatethisstrategyofaChinese600MWePWRNPP,theplantmodelisbuiltusingSCDAP/RELAP5code.ATWS,SBO,SGTRandSLOCAareselectedasthebasecasesforanalysisofintentionaldepressurization.Theresultsshowthatopeningsafetyvalvesofpressurizermanuallywhenthecoreexittemperatureexceeds922KcanreducetheRCSpressureeffectivelyandpreventtheoccurrenceofHPMEandDCH.Severaluncertaintiessuchastheoperabilityofsafetyvalves,ex-vesselfailureandthetransitoryriseofRCSpressurearealsoanalyzedsubsequently.Theresultsshowthattheopeningofthesafetyvalvescanbeinitiatednormallyandthatopeningthreesafetyvalvesisamorefavorablestrategyintheeventofpossiblefailureofoneormoreofthesafetyvalves;theprobabilityofex-vesselfailureisreducedafterintentionaldepressurizationisimplemented;thetransitoryrisingofreactorcoolantsystem(RCS)pressurewhenthemoltencorematerialsrelocatetothelowerheadofreactorpressurevessel(RPV)willnotinfluencetheeffectofdepressurization.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
