AMMONIUM URANATE PLUTONATE, MANUFACTURE AND USE FOR MANUFACTURING MIXED OXIDE (U,PU)O2

摘要

The invention relates to an ammonium plutonate uranate, its preparation process and its use for the production of mixed oxide (u, pu) o2. / p & & p & the ammonium plutonate uranate is prepared by neutralization with ammonia, of an aqueous solution of salts of uranium vi and plutonium vi, for example of uranyl nitrate and plutonyl. This solution may be prepared by oxidation of a solution of nitrate and plutonium iv uranyl. By calcination under a reducing atmosphere of the ammonium plutonate uranate precipitate formed, it is possible to obtain a mixed oxide (u, pu) o2 having a solubility in hno3 11n without fluoride of at least 99,9%