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Structural material properties and dimensional stability of components in first wall components of a breeding blanket module

増殖ブランケット第一壁における構造材料の特性と部材の寸法安定性

廣瀬 貴規; 榎枝 幹男; 荻原 寛之; 谷川 博康; 秋場 真人

Hirose, Takanori; Enoeda, Mikio; Ogiwara, Hiroyuki; Tanigawa, Hiroyasu; Akiba, Masato

熱間等方圧加圧(HIP)法を用いて、低放射化フェライト鋼(F82H)製の実規模ITERテストブランケット構造物第一壁を試作し、工業的に実施可能な方法で第一壁構造物を製作する見通しを得た。本研究では、HIP接合に影響を及ぼす組み立て時の部品間の隙間を極小化する加工方法を明らかにした。さらに構造材料F82Hの材料特性を損なわないHIP処理条件を確立した。これにより、優れた寸法精度と材料特性を両立させるブランケット構造物を製作することに成功した。

This paper summarize the fabrication process of the first wall structure and provides the material properties of the structural material F82H and dimensional stability of the components through whole of the process. A cold-rolling process introduced typical stretched rolling structure and ferrite/martensite dual phase structure, which lead reduction in strength. These anisotropic microstructural features were successfully recovered by optimized HIP process at 1373 K. As for dimensional stability of the components, a full-scale mockup has been developed with F82H tubes and plates. The HIPped mockup demonstrated good accordance with a design drawing. The dimensions of wall thickness and cooling channels were to size even after HIP. According to these results, the fabrication process does not degrade the material properties and demonstrates good dimensional accuracy and stability of the FW structure.

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パーセンタイル:23.69

分野:Nuclear Science & Technology

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