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Isono, Takaaki; Hamada, Kazuya; Kawano, Katsumi; Abe, Kanako*; Nunoya, Yoshihiko; Sugimoto, Makoto; Ando, Toshinari*; Okuno, Kiyoshi; Bono, Takaaki*; Tomioka, Akira*; et al.
Teion Kogaku, 39(3), p.122 - 129, 2004/03
JAERI has been developing a large-capacity high-temperature superconductor (HTS) current lead for fusion application, and succeeded in fabricating and testing a 60kA HTS current lead satisfying ITER requirements. Targets of performance are 1/10 heat leak and 1/3 electric power consumption of cryogenic system compared with a conventional lead. To achieve the target, selection of sheath material of HTS, optimizing the Cu part, reduction of joule heat at joint between HTS and Cu parts, improve of heat transfer between HTS and stainless steel tube. Developed 60kA HTS current lead satisfied the design condition and almost achieved the targets. Adoption of the HTS current lead can reduce 13% electric power consumption of cryogenic system for ITER.
Isono, Takaaki; Kawano, Katsumi; Hamada, Kazuya; Matsui, Kunihiro; Nunoya, Yoshihiko; Hara, Eiji*; Kato, Takashi; Ando, Toshinari*; Okuno, Kiyoshi; Bono, Takaaki*; et al.
Physica C, 392-396(Part2), p.1219 - 1224, 2003/10
A 60-kA high-temperature-superconductor (HTS) current lead has been fabricated and tested for aiming at the application to a fusion magnet system, providing a low heat leak current lead. The design of HTS current leads is optimized not only to reduce the heat leak but also to perform safe operation even in fault conditions. The HTS current lead consists of a forced flow cooled copper part and a conduction cooled HTS part. The HTS part is composed of 288 Ag-10at.%Au sheathed Bi-2223 tapes and they are cylindrically arrayed on a stainless steel tube. The diameter and the length of the HTS part are 146 mm and 300 mm, respectively. Operation of a 60 kA current, which is the world record, was successfully achieved at coolant of 20 K, 3.2 g/s for the copper part, and a low heat leak of 5.5 W at 4.2 K was demonstrated. This result shows that the electric power of a refrigerator to cool the current lead can be reduced by 1/3 of that in a conventional current lead. In conclusion, technology of a large HTS current lead for fusion application is established.
Ando, Toshinari; Isono, Takaaki; Hamada, Kazuya; Nishijima, Gen; Tsuji, Hiroshi; Tomioka, Akira*; Bono, Takaaki*; Yasukawa, Yukio*; Konno, Masayuki*; Uede, Toshio*
IEEE Transactions on Applied Superconductivity, 11(1), p.2535 - 2538, 2001/03
Times Cited Count：6 Percentile：42.31(Engineering, Electrical & Electronic)no abstracts in English
Isono, Takaaki; Hamada, Kazuya; Ando, Toshinari; Tsuji, Hiroshi; Yasukawa, Yukio*; Tomioka, Akira*; *; *; *
IEEE Transactions on Applied Superconductivity, 9(2), p.519 - 522, 1999/06
Times Cited Count：8 Percentile：51.58(Engineering, Electrical & Electronic)no abstracts in English
Sugimoto, Makoto; Isono, Takaaki; Hamada, Kazuya; Kawano, Katsumi; Koizumi, Norikiyo; Nunoya, Yoshihiko; Matsui, Kunihiro; Kato, Takashi; Nakajima, Hideo; Takahashi, Yoshikazu; et al.
Teion Kogaku, 33(8), p.549 - 560, 1998/00
no abstracts in English
*; Matsui, Kunihiro; ; *; Kato, Takashi; Tsuji, Hiroshi; *; Yoshida, Kiyoshi; Yasukawa, Yukio*; Hiue, Hisaaki*; et al.
Proc. of 16th Int. Cryogenic Engineering Conf. /Int. Cryogenic Materials Conf., 0, p.135 - 138, 1996/00
no abstracts in English
Takahashi, Yoshikazu; Sugimoto, Makoto; Matsui, Kunihiro; Takano, Katsutoshi*; *; Koizumi, Norikiyo; Nunoya, Yoshihiko; Nakajima, Hideo; Kato, Takashi; *; et al.
Proc. of 16th Int. Cryogenic Engineering Conf. /Int. Cryogenic Materials Conf., 0, p.795 - 798, 1996/00
no abstracts in English
; ; *; Hiyama, Tadao; Kato, Takashi; *; Kawano, Katsumi; ; *; *; et al.
Advances in Cryogenic Engineering, Vol.31, p.225 - 233, 1986/00
no abstracts in English
; ; ; *; *; *
FAPIG, (114), p.25 - 30, 1986/00
no abstracts in English
*; ; *;
JAERI-M 85-107, 32 Pages, 1985/08
no abstracts in English
; ; *;
Teion Kogaku, 18(6), p.324 - 325, 1983/00
no abstracts in English
