Effect of Irradiation on the Microstructure of Swaged UO<SUB>2</SUB>

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概要

• 論文の詳細を見る

• A study was made of the microstructure of swaged UO<SUB>2</SUB>, irradiated to a burnup of 3, 000 MWD/T-U at an estimated center-line temperature of 1, 400°C.<BR>In the peripheral zones of the specimen near the cladding, evidence was observed of sintering of the UO<SUB>2</SUB> particles by irradiation even at comparatively low temperatures (about 300°400°C). Tracks of fission product fragments were observed at the inner wall surface of cracks in the specimen. The width of the tracks is seen to be larger than observed on thin films and on sintered UO<SUB>2</SUB>. Mixed phases of UO<SUB>2</SUB> and fission products precipitated in the interior of crystal grains, observed in the form of hillocks left unetched, were surmounted by several sprouts of substances still more chemically stable. Mixed phases of UO<SUB>2</SUB> and fission products were precipitated on the inner wall surface of the cracks and appeared upon etching as stepped protuberances of irregular contours. A comparison between the microstructures of swaged UO<SUB>2</SUB> and sintered UO<SUB>2</SUB> irradiated under the similar conditions is discussed.

• 一般社団法人 日本原子力学会の論文

著者

• ISHII Bumpei

  Engineering and Research Laboratory, Mitsubishi Atomic Power Industries Inc.

• TAKAHASHI Shuichiro

  Engineering and Research Laboratory, Mitsubishi Atomic Power Industries, Inc.

• TAKAHASHI Shuichiro

  Engineering and Research Laboratory of Mitsubishi Atomic Power Ind., Inc.

関連論文

• Fabrication of Stabilized Uranium Monocarbide Compacts
• Fabrication of UO2 Fuel Rod by Vibratory Compaction
• Microstructure of Irradiated Uranium Dioxide
• Effect of Irradiation on the Microstructure of Swaged UO2

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