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Helium release from the uranium-plutonium mixed oxide (MOX) fuel irradiated to high burn-up in a fast breeder reactor (FBR)

高速炉用MOX燃料からのヘリウム放出挙動

勝山 幸三 ; 石見 明洋 ; 前田 宏治 ; 永峯 剛; 浅賀 健男

Katsuyama, Kozo; Ishimi, Akihiro; Maeda, Koji; Nagamine, Tsuyoshi; Asaka, Takeo

高速実験炉「常陽」で照射した燃料ピンのパンクチャ試験を実施し、燃料ペレットから放出されたヘリウム量を測定した。その結果、燃焼度に比例してヘリウム放出量が増加することを確認するとともに、製造時の$$^{241}$$Amの含有量も影響していることを確認した。

The helium releases were investigated in FBR fuel pins irradiated to high burn-up. The released amounts of helium gas increased with the increase of burn-up, but their data were scattered in the region of high burn-up region. This was understood to be caused by the differences of $$^{241}$$Am contents among fuel pellets, because this nuclide generates $$^{242}$$Cm which undergoes alpha decay at a short half life.

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パーセンタイル:26.36

分野:Materials Science, Multidisciplinary

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