Title of article
Probabilisticsafetyanalysisofanaccelerator—LithiumtargetbasedexperimentalfacilityOriginalResearchArticle
Author/Authors
LucianoBurgazzi، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
11
From page
1264
To page
1274
Abstract
Theinternationalfusionmaterialsirradiationfacility(IFMIF)isaimedtoprovideanintenseneutronsourcebyahighcurrentdeuteronlinearacceleratorandahigh-speedlithiumflowtarget,fortestingcandidatematerialsforfuturefusionreactors.
AnactivityaimedatthesafetyassessmentoftheIFMIFplantasawholehasbeencarriedoutapplyingtheprobabilisticriskassessment(PRA)approachtoidentifyandquantifyintermsofexpectedfrequencies,thedominantaccidentsequencesrelatedtotheplantoperation,anddefinethereferenceaccidentscenariostobefurtheranalyzedthroughdeterministictransientanalysis,inordertoverifythefulfilmentofthesafetycriteria.
Theaccidentsequenceshavebeenmodeledthroughtheeventtreetechnique,whichallowsidentifyingallpossiblecombinationsofsuccessorfailureofthesafetysystemsinrespondingtoaselectionofinitiatingevents.Theidentificationofaccidentinitiators,providedbythefailuremodeandeffectanalysis(FMEA)procedure,isfollowedbythesystemsanalysisbasedonfaulttreetechnique,fortheunavailabilityassessmentofthesafetysystems:finallytheaccidentsequencescenariosareassessedbyRISKSPECTRUMsoftware.
ThestudyhasallowedforthedevelopmentofallaccidentsequencesresultingfromselectedinitiatorsrelativetoIFMIFplantandtheirgroupingwithinsequencefamilies,denotedasplantdamagestates,onaccountoftheplantresponseandexpectedconsequences.Thefrequencyassignedtoeachfamilysequenceisthesumofthecontributorsrelativetoallsequencesendingintothatparticularplantstate.
TheoutcomeoftheanalysisshowsthatIFMIFplantisquitesafeandpresentsnosignificanthazardtotheenvironment:infactallthesequencesimplyingpotentialundesiredeffectsasradioactivereleasetotheoutside,showverylowfrequencies,wellbelowthelimitforcredibleaccident(1.0E−6/year).Inaddition,duetothenoveltyofthedesignandthelargespreadingassignedtothefailureparameterprobabilisticdistributions(datautilizedintheprobabilisticanalysisofthisoneofakindplantarelargelyofagenericnature),anuncertaintyanalysishasbeenperformedtoaddcredittothemodelquantificationandtoassessifthesequenceshavebeencorrectlyevaluatedontheprobabilitystandpoint.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2006
Journal title
Nuclear Engineering and Design Eslah
Record number
896077
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