Manufacturing progress of ITER TF coil in Japan

Japan Atomic Energy Agency (JAEA) has a responsibility of the procurement of 25% of TF conductor, 9 TF winding packs and 19 TF coil cases as Japanese Domestic Agency (JADA). The TF conductor is a circular shaped cable-in-conduit conductor, which is composed of a cable and a stainless steel jacket, and its maximum length is 760 m. JAEA started to produce strands, cables, jackets and to contract a jacketing facility from 2008, and a jacketing facility, dummy cable, jacket sections and procedures have been prepared in December 2009. After the preparation, JAEA fabricated the 760-m Cu dummy conductor as a process qualification. Furthermore, JAEA has contracted companies for fabrication trials of a full-scale RP and winding trials of a one-third scale double pancake to verify feasibility of the required tolerances from an industrial view point. Prior to these trials, JAEA developed a preliminary manufacturing plan, and industry is carrying out small-scale trials to demonstrate applicability of the manufacturing plan. The progress of the TF conductor procurement, results of the small-scale trials and progress on the reduced and full-scale trials are presented. (author)