Decrease of Cesium Release from Irradiated UO_2 Fuel in Helium Atmosphere under Elevated Pressure of 1.0 MPa at Temperature up to 2,773K
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概要
- 論文の詳細を見る
In the case of severe accidents, the radionuclides release from fuel could mostly occur at high temperature under elevated pressure. The effect of temperature on the release has been clarified in many previous studies while the pressure influence has been scarcely investigated so far due to difficulty in the experimental operation. To investigate the effect of pressure on the release, two tests under the same conditions except for the system pressure were performed in the VEGA program at JAERI by heating up the irradiated UO2 fuels up to 2,773 K in inert helium. The test results uniquely showed that the release rate of cesium for the temperatures below 2,773 K at 1.0 MPa could be suppressed by about 30% compared with that at 0.1 MPa. This article describes the outlines of the two tests and the observed effects of system pressure on cesium release as well as the results of various post-irradiation examinations. Moreover, the mechanisms and models that explain the pressure effect are discussed.
- 社団法人 日本原子力学会の論文
- 2002-07-25
著者
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Hidaka A
Japan Atomic Energy Res. Inst. Ibaraki
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Hidaka Akihide
Department Of Reactor Safety Research Japan Atomic Energy Researth Institute
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Kudo Tamotsu
Japan Atomic Energy Research Institute
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KUDO Tamotsu
Department of Reactor Safety Research, Japan Atomic Energy Researth Institute
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Uetsuka Hiroshi
Surface Chemistry Laboratory Kanagawa Academy Of Science And Technology Ksp East 404
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Uetsuka Hiroshi
Japan Atomic Energy Research Institute
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Uetsuka Hiroshi
Institute Of Materials Science University Of Tsukuba
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Uetsuka Hiroshi
Department Of Reactor Safety Research Japan Atomic Energy Research Institute
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Kudo Tamotsu
Department Of Reactor Safety Research Japan Atomic Energy Researth Institute
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NAKAMURA Takehiko
Department of Reactor Safety Research, Japan Atomic Energy Research Institute
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Uetsuka H
Department Of Reactor Safety Research Japan Atomic Energy Research Institute
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Nakamura Takehiko
Japan Atomic Energy Research Institute
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Nakamura Takehiko
Department Of Reactor Safety Research Japan Atomic Energy Research Institute
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Nakamura Takehiko
Department Of Dermatology Kumamoto National Hospital
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UETSUKA Hiroshi
Department of Fuel Safety Research, Japan Atomic Energy Research Institute
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