Author/Authors :
KensukeKonishi، نويسنده , , Jun-IchiToyooka، نويسنده , , KenjiKamiyama، نويسنده , , IkkenSato، نويسنده , , ShigenobuKubo، نويسنده , , ShojiKotake، نويسنده , , KazuyaKoyama، نويسنده , , AlexanderD.Vurim، نويسنده , , ValeryA.Gaidaichuk، نويسنده , , AlexanderV.Pakhnits، نويسنده , , YuriS.Vassiliev، نويسنده ,
Abstract :
TheWF(wallfailure)testoftheEAGLEprogram,inwhich∼2kgofuraniumdioxidefuel-pinsweremeltedbynuclearheating,wassuccessfullyconductedintheIGR(ImpulseGraphiteReactor)ofNNC/Kazakhstan.Inthistest,a3mm-thickstainlesssteel(SS)wallstructurewasplacedbetweenfuelpinsanda10mm-thicksodium-filledchannel(sodiumgap).Duringthetransient,fuelpinswereheated,whichledtotheformationofafuel-steelmixturepool.Underthetransientnuclearheatingcondition,theSSwallwasstronglyheatedbythemoltenpool,leadingtowallfailure.Thetimeneededforfuelpenetrationintothesodium-filledgapwasveryshort(lessthan1safterthepoolformation).TheresultsuggeststhatmoltencorematerialsformedinhypotheticalLMFBRcoredisruptiveaccidentshaveacertainpotentialtodestroySS-wallboundariesearlyintheaccidentphase,therebyprovidingfuelescapepathsfromthecoreregion.Theearlyestablishmentofsuchfuelescapepathsisregardedasafavorablecharacteristicineliminatingthepossibilityofseverere-criticalityevents.ApreliminaryinterpretationontheWFtestresultsispresentedinthispaper.
