VERFAHREN ZUR HERSTELLUNG EINES PULVERS AUF DER BASIS VON URANOXID(EN), MINDESTENS EINES NEBENAKTINIDS UND GEGEBENENFALLS VON PLUTONIUM

摘要

The invention relates to a method for preparing a powder based on oxide(s) comprising uranium, at least one minor actinide and optionally plutonium, comprising the following steps: a) a step of adding at least one monomer to an aqueous solution comprising nitrate ions and comprising uranium, at least one minor actinide and optionally plutonium, said monomer comprising at least one ethylenic group and at least one polar group capable of forming hydrogen bonds ;b) a step of obtaining a gel trapping said aqueous solution by polymerization of the monomer(s) added in a); c) a step of obtaining a xerogel comprising nitrates of uranium, of at least one minor actinide and optionally of plutonium by dehydration of the gel obtained in b); d) a step of obtaining said powder by heat treatment of the xerogel obtained in c).