Process and apparatus for the preparation of sinterable uraniumdioxide.

摘要

1. Process for continuous manufacture of sinterable uranium dioxide which comprises, in a single vessel and in succession, transforming gaseous UF6 into uranium oxifluoride UO2 F2 by reacting UF6 with steam in a nitrogen atmosphere, then circulating UO2 F2 in countercurrent to heated steam for generating U3 O8 which is finally reduced into uranium dioxide UO2 with hydrogen, characterized in that a flow of uranium dioxide to be recycled is also introduced into the airtight conversion vessel (10) and the flow of UF6 and conversion reactants is decreased for maintaining the flow rate of uranium dioxide which is delivered at a value which is close to the rated production capacity.