Record number :
894986
Title of article :
RuptureofspentfuelZircaloycladdingindrystorageduetodelayedhydridecrackingOriginalResearchArticle
Author/Authors :
C.K.Chao، نويسنده , , K.C.Yang، نويسنده , , C.C.Tseng، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
6
From page :
124
To page :
129
Abstract :
DelayedhydridecrackingintheZircaloyalloyhasbeenconsideredasapossibledegradationmechanismofspentnuclearfuelcladdingininterimdrystorage.Somerecentin-corefuelfailuresindicatedthatalongaxialcrackdevelopedinthecladdingwasasecondaryfailurebydelayedhydridecracking.TheaimofthisstudyistodefinetheeffectsofhydridereorientationonthefailureofZircaloycladding.Differenthydrideorientations,theamountofzirconiumhydrideandvariouscrackingtypes,allhavebeenconsideredfortheireffectsonthecrackgrowthandstabilityofthecladding,andhavebeenthoroughlydiscussedinthispaper.Afiniteelementcomputercode,ANSYS,hasbeenusedinconjunctionwiththestrainenergydensitytheory.Insummary,thecrackpropagationwillbeaggravatedifthehydrideorientationisshiftedfromthecircumferentialtotheradialdirection.Foralargercracklength,thezirconiumhydrideplaysanimportantroleinaffectingthecrackgrowthbecausethestrainenergydensityfactorincreasesasthehydrideapproachesthecracktip.Furthermore,whenthermaleffectsareconsidered,acompressivestressexistsattheinnersideofthecladding,whileatensilestressisfoundattheoutersideofcladding,thusresultingincrackpropagationfromtheoutersidetotheinnersideofthecladding.Thesefindingsareinaccordancewithotherexperimentalresultsinrelatedliterature.
Journal title :
Nuclear Engineering and Design Eslah
Serial Year :
2008
Link To Document :
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