Process for the purification of urananium hexafluoride containing traces of plutonium fluoride and/or neptunium fluoride

摘要

The subject of the invention is a process for the purification of uranium hexafluoride containing traces of plutonium fluoride and / or neptunium fluoride. According to this process, the uranium hexafluoride to be purified is brought into contact with a metal fluoride chosen from the group comprising lead fluoride PbF2, uranium fluorides of formula UF4 → x in which x has a value ranging from 0 to 1 and the chromium trifluoride CrF3, at a temperature such that the plutonium and / or neptunium fluorides are reduced, and the thus purified uranium hexafluoride is recovered. Application to the purification of uranium hexafluoride from a facility for reprocessing irradiated fuels.