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
Link To Document :
https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=895178
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