Progress of ITER TF Coil Development in Japan

Matsui, K.; Hemmi, T.; Kajitani, Hideki; Takano, Katsutoshi; Yamane, Minoru; Koizumi, N.

doi:10.1109/tasc.2013.2294959

Cited by 10 publications

(2 citation statements)

References 5 publications

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“…To achieve these targets, a welding procedure that combines a laser and arc welding was established via trials in RP segment and sector assembly. A machining process was also established as well [9]. Consequently, all 63 RPs were manufactured as per the flatness, profile, and groovelength scatter requirements shown in Figs.…”

Section: Radial Plate Fabrication and Cover Plate Weldingmentioning

confidence: 99%

Completion of all Winding Packs for ITER Toroidal Field Coils in Japan

Kajitani

Nakamoto

Suwa

et al. 2023

Plasma and Fusion Research

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In Japan, National Institutes for Quantum Science and Technology (QST) has the responsibility to develop nine toroidal field (TF) coils, each of which consists of a winding pack (WP) and coil case for the ITER project. The WP consists of seven double-pancakes (DPs), which consist of conductors inserted into D-shaped radial plates (RPs). Although a WP is significantly large (14 m high and 9 m wide), the position of the current center line of the WP must be controlled within a few millimeters. Therefore, numerous technical challenges arose in DP and WP manufacturing. Herein, in the RP manufacturing, the optimization of welding and machining procedures, and accurate manufacturing techniques were established. Subsequently, all RPs were fabricated around the flatness errors of 1 mm from the nominal. In cover plate (CP) welding, the welding procedure was optimized so that a good DP flatness after CP welding was achieved. In the WP insulation, by developing a method to insulate a WP while applying compression, the dimensions within errors of a few milli-meters is achieved in all of WPs. Consequently, all nine WPs were successfully completed for TF coils in Japan in March 2022.

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Section: Radial Plate Fabrication and Cover Plate Weldingmentioning

confidence: 99%

Completion of all Winding Packs for ITER Toroidal Field Coils in Japan

Kajitani

Nakamoto

Suwa

et al. 2023

Plasma and Fusion Research

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“…Following this, new RP manufacturing procedures were proposed by EUDA, full final machining of RP grooves [7] by JADA, final assembly of RP sub-sections with extra length [8] to accommodate the ±0.05% error between the RP grooves and the heat-treated conductor lengths.…”

Section: Development Of Iter Tf Coils In Japanmentioning

confidence: 99%

Progress of ITER and JT-60SA Magnet Development in Japan

Koizumi¹,

Yoshihiko²,

Yoshida³

et al. 2014

Physics Procedia

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Japan Atomic Energy Agency (JAEA), as the Japan Domestic Agency (JADA), has the responsibility to procure 9 ITER toroidal field (TF) coils, 19 TF coil (TFC) structures, 25% of the TF conductors and 100% of the central solenoid (CS) conductors in ITER and, in addition, CS and equilibrium field (EF) coils including their conductors in JT-60SA, which is being developed as a satellite facility for ITER. In ITER, more than 90% of TF conductor fabrication was completed and finalization of the manufacturing procedure of TF coils is in progress through full-scale trials, such as trial fabrication of dummy double pancakes (DPs). In JT-60SA, fabrication of the EF4 coil was completed and the EF5 and EF6 coils are being assembled.

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