Title of article
Analysisofmechanicalloadoncladdinginducedbyfuelswellingduringpowerrampinhighburn-uprodbyfuelperformancecodeFEMAXI-6OriginalResearchArticle
Author/Authors
MotoeSuzuki، نويسنده , , HiroshiUetsuka، نويسنده , , HiroakiSaitou، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
14
From page
1
To page
14
Abstract
Mechanicalloadoncladdinginducedbyfuelswellinginahighburn-upBWRtyperodwasanalyzedbyafuelperformancecodeFEMAXI-6.ThecodewasdevelopedfortheanalysisofLWRfuelrodbehaviorsinnormaloperationandtransientconditionsusingfiniteelementmethod(FEM).
Duringapowerrampforthehighburn-uprod,instantaneouspelletswellingcansignificantlyexceedthelevelthatispredictedbya“steady-rate”swellingmodel,causingalargecircumferentialstrainincladding.Thisphenomenonwassimulatedbyanewswellingmodeltotakeintoaccountthefissiongasbubblegrowth.AsaresultitwasfoundthatthenewmodelcangivereasonablepredictionsoncladdingdiameterexpansionincomparisonwithPIEdata.Thebubblegrowthmodelassumesthattheequilibriumstateequationholdsforabubbleunderexternalpressure,andsimultaneoussolutionisobtainedwithbothbubblesizedeterminationequationanddiffusionequationoffissiongasatoms.Inaddition,apellet-cladbondingmodelwhichhasbeenincorporatedinthecodetoassumesolidmechanicalcouplingbetweenpelletoutersurfaceandcladdinginnersurfacepredictedthegenerationofbi-axialstressstateinthecladdingduringramp.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2004
Journal title
Nuclear Engineering and Design Eslah
Record number
894695
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