Pyrohydrolysis reactions of UF4 and UO2F2. Effect of Oxygen on reactions.:Effect of Oxygen on Reactions
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概要
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This study was made for clarification of the pyrohydrolysis behaviors of UF<SUB>4</SUB> and UO<SUB>2</SUB>F<SUB>2</SUB>. The progress of the reaction was measured by titrating the amount of produced hydrogen fluoride. When nitrogen was used as carrier gas of water, the pyrohydrolysis of UF<SUB>4</SUB> pro-ceeded at the temperatures of 350400°C, and UO<SUB>2+<I>x</I></SUB> (<I>x</I> ?? 0.3) was formed; the value of <I>x</I> decreased with the decrease of oxygen dissolved in the water. In the case of oxygen car-rier gas, the pyrohydrolysis of UF<SUB>4</SUB> formed U<SUB>3</SUB>O<SUB>8</SUB>-UO<SUB>2</SUB>F<SUB>2</SUB> mixture as the reaction product in the above temperature region and the reaction was markedly retarded in the course because of lower rate in the pyrohydrolysis of UO<SUB>2</SUB>F<SUB>2</SUB>. The pyrohydrolysis of UO<SUB>2</SUB>F<SUB>2</SUB> proceeded at a little higher temperature of 450500°C in both cases of nitrogen and oxygen carrier gas and α-UO<SUB>3</SUB> was formed.
- 一般社団法人 日本原子力学会の論文
著者
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IWASAKI Matae
Tokai Research Establishment, Japan Atomic Energy Research Institute
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ISHIKAWA Niro
Tokai Research Establishment, Japan Atomic Energy Research Institute