PROCESS FOR PREPARING PELLETS OF A DENSE MIXED FUEL BASED ON URANIUM, PLUTONIUM AND OPTIONALLY MINOR ACTINIDE(S)

摘要

The invention relates to a process for preparing pellets of a dense mixed fuel comprising uranium dioxide UO₂, plutonium oxide PuO₂ and optionally at least one oxide of minor actinide(s) or of a fuel comprising a solid solution of uranium dioxide, plutonium and optionally at least one minor actinide successively comprising the following steps: a) a step of co-micronization of a mixture of powders comprising a powder of uranium oxide(s), of which all or some of this powder consists of triuranium octoxide U₃O₈, a powder of plutonium oxide PuO₂ and optionally a powder of oxide(s) of minor actinide(s); b) a step of compacting the mixture of powders in the form of pellets; c) a step of sintering the pellets obtained in b).