Thermodynamic analyses on oxygen and carbon potentials of impure Helium.

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概要

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• Equilibrium oxygen and carbon potentials of impure He containing small amounts of Impurities such as CO, CO<SUB>2</SUB>, CH<SUB>4</SUB>, H<SUB>2</SUB>, H<SUB>2</SUB>O and O<SUB>2</SUB> at 1, 073 and 1, 273 K were studied. The calculation of equilibrium composition of impurities was carried out assuming the gas-gas and gas-metal reactions. The diagrams, expressed with atomic oxygen fraction O/S and atomic carbon fraction C/S were represented and showed a wide range of equilibrium oxygen and carbon potentials of impure He. A parameter, (O-C)S showing the difference between atomic oxygen and carbon fraction, was found to give a measure of both oxygen and carbon potentials of gas mixtures. The results of the calculation showed that the oxygen and carbon potentials of the impure He with (O-C)S value of around zero was easily affected by the small variation of the gas composition. The corrosion behaviors of Inconel 617 in various impure He gases at 1, 273 K could be explained by (O-C)/S values.

• 一般社団法人 日本原子力学会の論文

著者

• OKADA Masatoshi

  Nuclear Materials Division, National Research Institute for Metals

• NODA Tetsuji

  Nuclear Materials Division, National Research Institute for Metals

• HIRANO Toshiyuki

  Nuclear Materials Division, National Research Institute for Metals

• YOSHIDA Heitaro

  Nuclear Materials Division, National Research Institute for Metals

• WATANABE Ryoji

  Nuclear Materials Division, National Research Institute for Metals

関連論文

• Thermodynamic analyses on oxygen and carbon potentials of impure Helium.

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