Hydrolysis of Uranium Nitrides
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概要
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Studies were made on the hydrolysis of uranium nitrides (UN and cubic U<SUB>2</SUB>N<SUB>3</SUB>) by super-heated steam. The resulting gaseous products were mainly hydrogen, though with U<SUB>2</SUB>N<SUB>3</SUB> the hydrogen generation was replaced by that of nitrogen at higher temperatures. The condensed water contained ammonia, but not hydrazine. Both UN and U<SUB>2</SUB>N<SUB>3</SUB> powders were ultimately con-verted to UO<SUB>2.1</SUB> after hydrolysis at temperatures up to 600°C; intermediate products (formed below 400°C) were presumably UO<SUB>2</SUB>(N) or UN<SUB>1.7</SUB> in the case of UN and UN<SUB>1.8</SUB> with U<SUB>2</SUB>N<SUB>3</SUB>.<BR>The reaction mechanisms corresponding to the formation of such chemical species were estimated mainly from the behavior of nitrogen and hydrogen evolution and from the yield of ammonia. The effect brought by N<SUB>2</SUB> atmosphere on the ammonia formation and on the dissolu-tion of nitrogen into solids were studied also by the hydrolysis under flowing N<SUB>2</SUB> gas. It was revealed that the yield of ammonia increased and the dissolution was inhibited by N<SUB>2</SUB> atmos-phere.
- 一般社団法人 日本原子力学会の論文
著者
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Imoto Shosuke
Department Of Nuclear Engineering Faculty Of Engineering
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Sugihara Sunao
Department Of Material Science And Ceramic Technology Shonan Institute Of Technology
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SUGIHARA Sunao
Department of Nuclear Engineering, Faculty of Engineering, Osaka University
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