Method for preparing a sinterable uranium dioxide powder

Details Method for preparing a sinterable uranium dioxide powder Method for preparing a sinterable uranium dioxide powder

C - Chemistry, Metallurgy

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G

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C01G 43/025 (2006.01) G21C 3/62 (2006.01)

Patent

CA 1197069

METHOD FOR PREPARING A SINTERABLE URANIUM DIOXIDE POWDER ABSTRACT OF THE DISCLOSURE The invention discloses an improved method for preparing a sinterable uranium dioxide powder for use and preparation of nuclear fuel wherein microwaves heat a start- ing material comprising a compound selected from uranyl nitrate hexahydrate, ammonium diuranate and ammonium uranyl carbonate for a sufficient period to decompose the starting compound; continuing to heat the decomposed compound in a microwave induction furnace in reducing atmosphere until the decomposed compound further decomposes to uranium dioxide powder. The powder is then cooled in a reducing atmosphere. The method may be practiced in a number of different atmospheres, such as an oxidizing atmosphere or a reducing atmosphere, to meet specific products needs. Desirable temperature ranges for practicing the invention are also practiced.

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