Title of article
Interpretationoffission-producttransportbehaviourinthePhébusFPT0andFPT1testsOriginalResearchArticle
Author/Authors
M.P.Kissane، نويسنده , , I. Drosik، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
14
From page
1210
To page
1223
Abstract
PhébusFPstudiesthephenomenologyofsevereaccidentsinwater-coolednuclearreactors.Testscoverfuelroddegradationandbehaviouroffission-productsreleasedviathecoolantsystemintothecontainment.Analysisusingcomputercodesaimstoidentifymodellingweaknesses.Regardingfission-productbehaviourinthecoolantcircuit,analysesoftestsFPT0andFPT1arepresentedthatusedastandardversionofacode,SOPHAEROS,withinputdatabasedsolelyonmeasuredboundaryconditions.Disagreementsbetweencalculatedandexperimentalresultsareexploredandplausibleexplanationspresented.Itisshownthatinlaminarconditionsforasupersaturatedvapourwithcompetinghomogeneousnucleation,heterogeneousnucleationandcondensationonstructures,codescansignificantlyunderestimatethelatterifentranceeffectsareignored.Wherethermophoresisdominatesinhydrodynamicallydeveloped,weaklyturbulentflow,codescanoverestimatedeposition;thelikelyexplanationisunderestimatedmechanicalresuspension.Concerningthetransportofvapourspecies,itisshownthatobservationsarecompatiblewithpassageofnon-negligibleamountsofthegashydrogeniodidethroughthecircuit.Thefinalaspectoftheexerciseconcernsdepositremobilizationwherethiswasdifferentinthetwotestsandtheunderstandingofwhichremainsmorespeculative.ExplanationinvokesvibrationoftheapparatusproducingmechanicalresuspensioninFPT0andsteamreactingwithcaesiumdepositsproducingcaesiumhydroxideinFPT1.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2006
Journal title
Nuclear Engineering and Design Eslah
Record number
896073
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