Title of article :
DevelopmentofthemechanisticcodeMFPRformodellingfission-productreleasefromirradiatedUO2fuelOriginalResearchArticle
Author/Authors :
M.S.Veshchunov، نويسنده , , V.D.Ozrin، نويسنده , , V.E.Shestak، نويسنده , , V.I.Tarasov، نويسنده , , R.Dubourg، نويسنده , , G.Nicaise، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
ThemodelsofthemechanisticcodeMFPRdevelopedincollaborationbetweenIBRAE(Moscow,Russia)andIRSN(Cadarache,France)aredescribed.Exhaustivedescriptionoffission-gasbehaviouringrainandoutofgrainisgiveninrelationwithindividualvalidationresultsonanalyticalexperimentsundervariousconditions(steadyirradiation,transient,post-irradiationannealing).ItisshownthatmicroscopicdefectsintheUO2crystalstructurecanstronglyinfluencefission-gastransportoutofgrainsandreleasefromfuelpellets.Thesedefectsincludepointdefectssuchasvacancies,interstitialsandfissionatoms,andextendeddefectssuchasbubbles,poresanddislocations.AmodelforthedislocationgenerationandevolutioninirradiatedUO2fuelhasbeendevelopedandimplementedinthemechanisticcodeMFPRalongwithafueldensificationmodel.Beingcombinedwiththesetofequationsdescribingevolutionofpointdefects(vacanciesandinterstitials)andtheirinteractionswithfission-gasbubbles,acompletelyself-consistentconsiderationofthewholesystemofpointandextendeddefectsinirradiatedUO2fuelhasbeenobtained.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
