A cikin man fetur na oxide, akwai yanayin zafi mai tsanani wanda ke haifar da ƙaurawar kayayyakin fission. Zirconium yana motsawa zuwa tsakiyar pellet na man fetur inda zafin jiki ya fi girma, yayin da ƙananan kayan fission ke motsawa zuwa gefen pellet. Pellet yana iya ƙunsar ƙananan ƙananan ƙwayoyin da suke kama da ƙwayoyin da suke samuwa a yayin amfani; xenon samfurin fission yana ƙaura zuwa waɗannan ƙwayoyin. Wasu daga cikin wannan xenon zai rushe don samar da caesium, sabili da haka yawancin waɗannan kumfa suna dauke da babban maida hankali na 137Cs. Tambaya: Matsanancin yanayin zafi yana haifar da ƙaurawar waɗanne abubuwa?
kayayyakin fission