InteractionsofI2andCH3IwithreactivemetalsunderBWRsevere-accidentconditionsOriginalResearchArticle

Abstract I2releasedfromfuelintheeventofaseverenuclearreactoraccidenthastheabilitytodepositonsurfacesinthecontainmentbuilding.ThisstudyhasfocusedonthereactionsofI2withreactivemetalsavailableinthecontainment.Theexperimentshavebeenperformedunderconditionssimilartothoseinaboilingwaterreactoratanaccidentsituation.Copper,zincandaluminiumshowedextensiveuptakeofgaseousI2underhumidconditions.Reactionratesweredeterminedat25,50and70°CandcouldbeusedforquantifyingtheeffectofreactionsbetweengaseousI2andcopper,zincandaluminium. ExperimentswiththemetalsplacedinwatershowedlowerI2uptake.ZinciodideandaluminiumiodiderapidlydissolvesinwaterandnouptakeofI2onthesesurfacescouldbeverified.CopperiodidehaslowsolubilityandI2wasadsorbedonthesurface. Experimentsperformedwithreactivemetalsandmethyliodideshowedaminoruptakeofmethyliodideonzincandaluminiuminthegasphasefortemperaturesupto80°C.Acontinuousuptakeofmethyliodideoncopperwasmeasuredat80°C.