Nuclear fuel pellet producing method, involves producing mixed powder by mixing uraninite and uranium dioxide powders, producing compact body by compressing mixed powder, and sintering body in reducing gas atmosphere at preset temperature

摘要

The method involves producing a uraninite powder having a mass surface of 1 square meter per gram by oxidation of uranium dioxide pellets, such that increasing speed of maximal weight of the pellets attains 0.06 percentages in weights per minute. An additive comprising a compound is mixed with the uraninite powder. A mixed powder is produced by mixing the uraninite powder and a uranium dioxide powder. A compact body is produced by compressing the mixed powder, and is sintered in an atmosphere of reducing gas e.g. hydrogen, at a temperature of 1600-1800 degrees Celsius. The reducing gas is chosen among carbon dioxide, water vapor and inactive air.