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Report No.

Status of procurement for ITER superconductors

Takahashi, Yoshikazu; Isono, Takaaki; Hamada, Kazuya; Nunoya, Yoshihiko; Nabara, Yoshihiro; Matsui, Kunihiro; Hemmi, Tsutomu; Koizumi, Norikiyo; Kawano, Katsumi; Oshikiri, Masayuki; Yoshikawa, Masatoshi*; Nakajima, Hideo; Okuno, Kiyoshi

The toroidal field (TF) coil system of the International Thermonuclear Experimental Reactor (ITER) consists of 18 D-shape coils. The operating current, the maximum field and the stored magnetic energy are 68 kA, 11.8 T and about 41 GJ, respectively. Nb$$_{3}$$Sn cable-in-conduit conductor (CICC) with a central channel is used. The superconducting cable consists of 900 Nb$$_{3}$$Sn strands and 522 copper strands, and they are cabled to a 5th stage cable with a central cooling spiral. The conductor manufacture started in 4 companies (strands in 2 companies, cabling, jacketing) in Japan, from March 2008. The 14.4 tonnes of strands were completed and satisfy their specifications in 2 companies. The copper dummy cable with a length of 760 m was successfully fabricated. The jacketing line was also completed. These details are reported.



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