Title of article
Advancedtreatmentofzircaloycladdinghigh-temperatureoxidationinsevereaccidentcodecalculations:PartIII.VerificationagainstrepresentativetransienttestsOriginalResearchArticle
Author/Authors
FFichot، نويسنده , , BAdroguer، نويسنده , , AVolchek، نويسنده , , YuZvonarev، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
13
From page
97
To page
109
Abstract
Thetreatmentofzirconiumoxidationkineticsinsevereaccident(SA)codeshasbeenthesubjectofmanydiscussionsandcontroversiesinrecentyears.Themainproblemwastheexistenceofseveralcorrelationswhichcouldleadtolargedifferencesinthecalculatedresults.Itappearedclearlythattherewasaneedtoconvergetowardsacommonunderstandingofthephysicalprocessesthatmustbemodeled(oxygendiffusion,blanketingeffect,etc.)andanagreeddatabaseamongcodedevelopersandusers.ItwouldhelpreducinganimportantsourceofuncertaintiesinSAcalculations.
Thekineticcorrelationdatabase,obtainedasaresultofexaminationofcomplementaryexperimentaldatainPartsIandII,isappliedheretoanalyzeafewhigh-temperatureseparate-effectstestsandbundleexperimentswhereZryoxidationreactionplayedadominantrole.TheICARE/CATHAREcomputercodedevelopedbyIRSNisusedtocheckthevalidityofthehigh-temperaturecorrelationsderivedinPartsIandII.Thephysicalmodelingprovidedbythecodeincludesdetailedaccountofspecificfeaturesofchemicalinteractionsbetweenfuelrodcladdingandsteam.Inparticular,highreactionratesatT>2000Karemoderatedbytwoeffects,examinedinPartI:steamblanketingduringthinoxidelayersgrowthandtransitiontooxidationofα-Zr(O)phaseaftertotalconsumptionofprimaryβ-Zrincladdingmetallicpart.
Whenappliedtoseparate-effectstests,theevaluatedparaboliccorrelationshaveshowntheirapplicabilitytodifferenttypesoftemperaturetransientstakingintoaccountZryoxidationspecificsinrodgeometry.ThebundleintegralexperimentsQUENCH-06andPHEBUSB9+didnotleadtoextremelylargetemperatureexcursions.Calculatedtemperatures,hydrogenproductionandoxidethickness,aswellasparametersofmeltrelocationwerefoundtoagreewellwithexperimentallymeasuredvalues.Asaresultofthisstudy,webelievethatthenewbest-fittedcorrelations,obtainedinagreementwithavailableexperimentaldata,canbeusedinfurtherstudiesandcanimprovepredictivepowerofthecodes.ThecontinuationofthecurrentworkwillbetheapplicationofICARE/CATHAREcodewithbest-fittedZryoxidationcorrelationstoNPPaccidentscenarios.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2004
Journal title
Nuclear Engineering and Design Eslah
Record number
894780
Link To Document