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Development of two-step softening heat-treatment for manufacturing 12Cr-ODS ferritic steel tubes

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成田 健; 鵜飼 重治  ; 皆藤 威二 ; 大塚 智史   ; 小林 十思美*

Narita, Takeshi; Ukai, Shigeharu; Kaito, Takeji; Otsuka, Satoshi; Kobayashi, Toshimi*

将来の実用化段階の高速炉燃料要素用の高性能炉心材料として酸化物分散強化型(ODS)フェライト鋼を開発している。ODSフェライト鋼被覆管が有する難加工性と低延性を克服する手段として開発した再結晶熱処理技術を被覆管製造プロセスに適用する場合に有効な二段軟化熱処理技術を開発した。

Focusing on the cover layer materials (as the Radon Barrier Materials), which could have the effect to restrain the radon from scattering into the air and the effect of the radiation shielding, we produced the radon barrier materials with crude bentonite on an experimental basis, using the rotary type comprehensive unit for grinding and mixing, through which we carried out the evaluation of the characteristics thereof.

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