Stability of krypton fixed in zeolite-3A and -5A.

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概要

• 論文の詳細を見る

• The fixation operation was carried out at 450650°C, 1, 000 atm for 24 h. The amount of fixed Kr was measured using thermal neutron activation analysis. For zeolite-3A the amount of Kr fixed decreased from 20 to 5 % as the fixation temperature rose. In the case of zeolite-5A, Kr fixation was observed at 550°C and above, and the amount increased to 15 w/o as the temperature rose to 650°C. The diffusion coefficient of Kr in the zeolite was determined from the result of heating tests. The value obtained was substituted in a diffusion equation, enabling us to predict the Kr release behavior at any temperature in a dry atmosphere. Both the samples of zeolite-3A fixed below 525°C and of zeolite-5A below 625°C showed an intensive Kr release in water that would not be expected from the release behavior under dry conditions. However, such unexpected release was not observed in either sample fixed above these respective temperatures. This could be accounted for by the fact that zeolite cations move easily when zeolite is moisturized.

• 一般社団法人 日本原子力学会の論文

著者

• Matsuoka Shingo

  Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo

• Nakamura Hirone

  Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo

• Tamura Takaaki

  Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo

• ITO Yasuo

  Tokai Division, Research Center for Nuclear Science and Technology, University of Tokyo

• TAKANO Takemi

  Tokai Division, Research Center for Nuclear Science and Technology, University of Tokyo

• MATSUOKA Shingo

  Nuclear Engineering Research Laboratory,Faculty of Engineering, University of Tokyo

• SUGAWARA Ichiro

  Nuclear Project Division, JGC Corp.

関連論文

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• Negative Ion Formation by Thermal Electron Attachment to Nitrous Oxide at Atomospheric Pressure (イオン化特集-続-)
• Stability and chemical form of iodine sorbed on silver-exchanged zeolite X.
• Stability of krypton fixed in zeolite-3A and -5A.

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