Title of article :
BehaviorofunirradiatedZrbaseduraniummetalfuelunderreactivityinitiatedaccidentconditionsOriginalResearchArticle
Author/Authors :
Yang-HyunKoo، نويسنده , , Chong-TakLee، نويسنده , , Je-YongOh، نويسنده , , Dong-SeongSohn، نويسنده , , M.Baryshnikov، نويسنده , , A.Chechurov، نويسنده , , B.Margulis، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Reactivityinitiatedaccident(RIA)testswith4unirradiatedZrbaseduraniummetalfuelrodswereperformedtoestablishacriterionwhichshouldbeobservedunderRIAconditions.Ofthefourtests,fuelfailureswereobservedinthetwoteststhatexperiencedthemaximumenergydepositionsof188and212cal/g,respectively.However,thefuelfailureswerenotobservedattheplaceofamaximumenergydepositionbutatthepositionwherethethermocoupleswereinstalled;onefailedatthepositionwhoselocalenergydepositionwas150cal/g,andtheotheroneattheplacewithenergydepositionof170cal/g.Thefuelfailuresseemtohaveoccurredbecauseexcessivepressure,whichwascausedbythepartialmeltingofthefuelmeat,wasappliedtothecladdingwithareducedthickness.However,otherpartsofthefuelrodsincludingtheplaceofamaximumenergydepositionmaintainedtheirintegrityandabigchangeinthetemperatureandpressureintheinternalcapsule,whichwouldbeanindicationofthefragmentationanddispersionofthefuelmeatintotheinternalcapsule,wasnotobserved.Visualinspectionalsoshowedthat,exceptforthethermocouplepositions,therewasnotraceofcladfailuresuchastheformationofbrittlecracksinthecladdingormeltingofthecladding.Therefore,fortheZrbaseduraniummetalfuelrods,itcanbeconcludedthatthethresholdenergydepositionabovewhichfragmentationanddispersionoffuelmeatintotheprimarycoolantsystemisexpectedtooccurcouldbehigherthan212cal/g.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
