压水堆核电厂严重事故情况下氢气源项研究

上海交通大学硕士学位论文压水堆核电厂严重事故情况下氢气源项研究姓名：郭连城申请学位级别：硕士专业：核能科学与工程指导教师：曹学武2007010160MELCORLOCALOCA1LOCA0.2-0.3kg/sMCCI0.001-0.005kg/s0.1kg/s2100000s27.8h330kg800kg0.38kg/s0.01kg/s3MCCIMELCORStudyontheHydrogenSourceduringSevereAccidentforPWRABSTRACTSomestudieshaveshownthathydrogendetonationisoneofthemajorriskcontributorstoearlycontainmentfailureinthecaseofasevereaccidentinanuclearpowerplant.Inthepasttwodecades,thedifferentaspectsofthisissuehavebeeninvestigatedinmanyresearchprograms.ByusingtheMELCORcode,thissubjectstudiesthehydrogensourceforthe600MWPWR,whichgeneratesthroughoxidationofZircaloybysteamandmoltencoreconcreteinteractionincavity,duringthesevereaccidentinducedbylarge,mediumandsmallLOCA,includingthesensitivityanalysisofthedifferentbreaksizesandlocations,andinducedbystationblackout,includingthesensitivityofthedifferentbreaksizesandtimingofpumpsealfailure.Theresultsofsensitivityanalysisaresummarizedasfollows:(1)Forsevereaccidentinducedbylarge,mediumandsmallLOCA,thepeakofin-vesselhydrogengenerationrate,whichisuntilthelowerheadofpressurevesselisfailed,isallattherangeof0.2-0.3kg/s.Andtheex-vesselhydrogengenerationrateisgenerallyattherangeof0.001-0.005kg/s,andthepeakofex-vesselgenerationrateinsomesequencesislessthan0.1kg/s.(2)Forsevereaccidentinducedbystationblackout,thein-vesselhydrogenproductionisabout330kg,andex-vesselisabout800kgwhenthecalculationtimereaches100000s(27.8h).Thepeakofin-vesselhydrogengenerationrateis0.33kg/sandex-vesselhydrogengenerationrateisunder0.01kg/s.(3)ThepumpsealsLOCAswhichmighthappeninastationblackoutsequenceresultindifferenteffectsonhydrogensourcedependingonthebreaksizesandtiming.Theearlyfailurewithasmallersizecausesadepressedin-vesselhydrogenproduction.Contrarily,thelatefailurewithalargersizecausesadepressedinex-vesselhydrogenproduction.Keywords:PWR,MELCOR,hydrogensourceLOCAaccident,SBOaccident20070122____20070122200701225.2.....................................................................405.2.11......................................................................................405.2.22......................................................................................415.3.........................................................................................................................41.......................................................436.1..........................................................................................................436.1.1.............................................................................................................436.1.2.........................................................................................436.1.3..........................................................................................446.2.....................................................................466.2.11......................................................................................466.2.22......................................................................................476.2.33......................................................................................486.3.........................................................................................................................49...................................................507.1.........................................................................................................507.1.1.............................................................................................................507.1.2.........................................................................................507.1.3.........................................................................................517.2.....................................................537.2.11......................................................................................537.2.22......................................................................................547.2.33......................................................................................557.2.44......................................................................................567.3.........................................................................................................................57.......................................................................................................................588.1.........................................................................................................................588.2.....................................................................................................................59.........................................................................................................................................60............................................................................................................................................65.............................................................................................661.120