Title of article
ThemodelingofgraphiteoxidationbehaviorforHTGRfuelcoolantchannelsundernormaloperatingconditionsOriginalResearchArticle
Author/Authors
XinliYu، نويسنده , , LaurentBrissonneau، نويسنده , , ChristianBourdeloie، نويسنده , , SuyuanYu، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
9
From page
2230
To page
2238
Abstract
Theoxidationofgraphiteinnormaloperatingconditionsisaveryimportantfactorwhenevaluatingtheservicetimeofthegraphitestructuralmaterialinahightemperaturegas-cooledreactor(HTGR).Thispaperdealswiththemodelingofgraphiteoxidationbysteamintheheliumchannelofafuelblock.TheFEMsoftwareCOMSOLisused:theturbulentflowofthecoolantissimulatedbyusingthek–ɛmodelandthechemicalreactionisexpressedbytheLangmuir–Hinshelwoodequation.Calculationswerecarriedoutforsteampressuresaround1Paandfordifferenttemperaturedistributions.Theinfluenceofburn-offandthediffusioningraphiteporositieswerebothconsideredintheoxidation.Resultsshowthatoxidationmainlyoccurredonthegraphitesurfaceatthebottomofthecorebecauseofthehighertemperature.Thethicknessofgraphitewithaburn-offhigherthan8%wasabout1mmatthecorebase.Lessthan15%ofsteamwasconsumedinthecoolantchannelofthefuelassemblies.Calculationsalsoshowedthatthemeangasificationrateinonechannelforthesecondservicetimewaslargerthanthefirstservicetime.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895178
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