低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
研究論文
ITER TF コイル・ダブルパンケーキの製作技術開発
―高精度巻線技術の開発成果―
諏訪 友音梶谷 秀樹中本 美緒高橋 良和吉澤 一美宇野 康弘松井 邦浩小泉 徳潔中平 昌隆野元 一宏久野 和雄藤原 英弘坂口 香織吉澤 裕一
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2020 年 55 巻 5 号 p. 319-327

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Double-pancake (DP) of ITER Toroidal Field (TF) coil consists of a cable-in-conduit conductor with Nb3Sn strands and a radial plate (RP). In the TF coil winding manufacturing process, a significant technical issue that was considered is that the difference of length between the heat-treated conductor and the RP grove must be controlled within ±0.023% to insert the conductor into the RP. This technical issue was solved by developing a highly accurate winding system and an RP assembly process to adjust the groove length. However, RP assembly was not able to begin before the winding is heat-treated, because the RP groove length is adjusted to the heat-treated conductor length in the assembly process developed. Therefore, it was difficult to satisfy the schedule required by ITER using this original manufacturing process. To solve this issue, an accuracy prediction method for the heat-treated conductor length was developed in which a highly accurate manufacturing process is used, and RP assembly can proceed in parallel with the winding manufacturing process. Applying this optimized process, both the required accuracy of the winding and the scheduling requirements of ITER are successfully satisfied for the series production of TF coil windings.

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© 2020 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
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