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Journal Articles

Effect of electromagnetic force on the pressure drop and coupling loss of cable-in-conduit conductor

Hamada, Kazuya; Takahashi, Yoshikazu; Matsui, Kunihiro; Kato, Takashi; Okuno, Kiyoshi

Cryogenics, 44(1), p.45 - 52, 2004/01

 Times Cited Count:19 Percentile:39.04(Thermodynamics)

In the ITER Central Solenoid Model Coil (CSMC) and a CS Insert Coil (CSIC) experiment, a pressure drop of the CSIC decreased by about 12% at 40 kA, 10 T and coupling losses indicated an transport current dependence. As a result of pressure drop analysis, an electromagnetic force causes a compressive deformation of cable in a jacket and a new flow passage was generated as a gap between cable and jacket. The cable deformation causes a decrease of a contact electrical resistance between strands and an increase of coupling losses. Taking account of the electromagnetic force dependency of a coupling time constant, calculated coupling losses show a good agreement with measured coupling losses at a pulsed operation of CSMC and CSIC.

Journal Articles

Pressure drop characteristics of Nb$$_{3}$$Al cable-in-conduit conductor under electromagnetic force; Relation between pressure drop characteristics and cable stiffness

Hamada, Kazuya; Matsui, Kunihiro; Takahashi, Yoshikazu; Nakajima, Hideo; Kato, Takashi; CS Model Coil Test Group

Teion Kogaku, 38(8), p.417 - 424, 2003/08

As one of the R&D of ITER. a hydraulic performance of Nb$$_{3}$$Al insert coil was measured and compared with other Nb$$_{3}$$Sn conductors. It seems that a longer twist pitch will promote a triangle helium flow space among 4th twist stage cables, jacket and center channel and contribute reduction of pressure drop. Under 500 kN/m of the electromagnetic force, the pressure drop of the Nb$$_{3}$$Al insert decreased by approximately 5%. Nb$$_{3}$$Al conductor indicated quit rigid characteristic under the electromagnetic force and suitable for future magnet with higher magnetic field and current.

Journal Articles

Experimental results of ITER Nb$$_{3}$$Al insert; Characteristics of acoustic emission

Ninomiya, Akira*; Arai, Kazuaki*; Takano, Katsutoshi*; Tsugawa, Kazuhito*; Ishigooka, Takeshi*; Kaiho, Katsuyuki*; Nakajima, Hideo; Okuno, Kiyoshi; CS Model Coil Test Group

Teion Kogaku, 38(8), p.425 - 433, 2003/08

no abstracts in English

Journal Articles

AC loss performance of cable-in-conduit conductor; Influence of cable mechanical property on coupling loss reduction

Matsui, Kunihiro; Takahashi, Yoshikazu; Koizumi, Norikiyo; Isono, Takaaki; Hamada, Kazuya; Nunoya, Yoshihiko; CS Model Coil Test Group

Teion Kogaku, 38(8), p.410 - 416, 2003/08

The test of the ITER Central Solenoid (CS) model coil, CS and Nb$$_{3}$$Al inserts was carried. The AC loss measurement is one of the most important tests to determine coil performance. The coupling losses of CS and Nb$$_{3}$$Al inserts were measured by calorimetric and magnetization methods, respectively. Both coils had coupling losses with many coupling time constant, and induced circulation currents were observed by voltage taps and hall sensors. Coupling losses decreased with exponential decay constants since the electromagnetic force broke weak sinter among the strands. The gap, created between the cable and the conduit by electromagnetic force, is dependent on the pressure drop of the coolant that flows in the conductor. Our analysis shows that the exponential decay constant of coupling losses is dependent on the gap size. If we can evaluate this exponential decay constant and apply the electromagnetic force that corresponds for the exponential decay constant to the conductor before the regular operation, we can use coils of the condition that coupling losses decrease on the operation.

JAEA Reports

Nb$$_3$$Al insert experiment log book; 3rd Experiment of CS model coil

Sugimoto, Makoto; Koizumi, Norikiyo; Isono, Takaaki; Matsui, Kunihiro; Nunoya, Yoshihiko; Tsutsumi, Fumiaki*; Oshikiri, Masayuki*; Wakabayashi, Hiroshi*; Okuno, Kiyoshi; Tsuji, Hiroshi

JAERI-Tech 2002-080, 100 Pages, 2002/11

JAERI-Tech-2002-080.pdf:7.89MB

The cool down of CS model coil and Nb$$_3$$Al insert was started on March 4, 2002. It took almost one month and immediately started coil charge since April 3, 2002. The charge test of Nb$$_3$$Al insert and CS model coil was completed on May 2, 2002. All of the experiments including the warm up was also completed on May 30, 2002.In this campaign, total shot numbers were 102 and the size of the data file in the DAS (Data Acquisition System) was about 5.2 GB. This report is a database that consists of the log list and the log sheets of every shot.

Journal Articles

Current sharing temperature of the ITER-TF insert

Nunoya, Yoshihiko; Sugimoto, Makoto; Isono, Takaaki; Hamada, Kazuya; Matsui, Kunihiro; Okuno, Kiyoshi; CS Model Coil Test Group

Teion Kogaku, 37(10), p.523 - 530, 2002/10

Vurrent sharing temperature (Tcs) measurement of ITER toroidal field insert was performed. The coil is Nb$$_3$$Sn superconducting coil and was installed inside of the ITER CS model coil as a backup field coil. Relation between the voltage of individual strand composing TF insert conductor and the measured voltage using the taps on the jacket is investigated and the evaluation method for Tcs measurement was established. The obtained results shows that there was discrepancy between the expected value from the strand data and the measured value which is lower by about 1.2K. Some discrepancy was already observed just after cool down of the insert before energizing.

Journal Articles

Electromagnetic force effect on pressure drop and coupling loss of cable in conduit conductor

Hamada, Kazuya; Takahashi, Yoshikazu; Matsui, Kunihiro; Kato, Takashi; Okuno, Kiyoshi

Teion Kogaku, 37(6), p.257 - 264, 2002/06

no abstracts in English

JAEA Reports

TF insert experiment log book; 2nd experiment of CS model coil

Sugimoto, Makoto; Isono, Takaaki; Matsui, Kunihiro; Nunoya, Yoshihiko; Tsutsumi, Fumiaki*; Tamiya, Tadatoshi*; Oshikiri, Masayuki*; Wakabayashi, Hiroshi*; Okuno, Kiyoshi; Tsuji, Hiroshi

JAERI-Tech 2001-085, 104 Pages, 2001/12

JAERI-Tech-2001-085.pdf:4.64MB

no abstracts in English

Journal Articles

Quench characteristics of the ITER CS insert coil

Isono, Takaaki; Matsui, Kunihiro; Kato, Takashi; Takahashi, Yoshikazu; CS Model Coil Test Group; Hasegawa, Mitsuru*

Teion Kogaku, 36(6), p.373 - 380, 2001/06

no abstracts in English

Journal Articles

AC Loss performance of CS insert coil

Matsui, Kunihiro; Nunoya, Yoshihiko; Kawano, Katsumi; Takahashi, Yoshikazu; Nishii, Kenji*; CS Model Coil Test Group

Teion Kogaku, 36(6), p.361 - 367, 2001/06

no abstracts in English

JAEA Reports

CS model coil experiment log book

Isono, Takaaki; Nishijima, Gen; Sugimoto, Makoto; Nunoya, Yoshihiko; Wakabayashi, Hiroshi*; Tsuji, Hiroshi

JAERI-Tech 2000-084, 393 Pages, 2001/02

JAERI-Tech-2000-084.pdf:16.39MB

no abstracts in English

JAEA Reports

REARA: Reactor kinetic analysis program for various events of reactivity insertion

Shimakawa, Satoshi; Tabata, Toshio; Komukai, Bunsaku

JAERI-Data/Code 99-045, p.31 - 0, 1999/11

JAERI-Data-Code-99-045.pdf:1.22MB

no abstracts in English

Journal Articles

R&D activity of SAGBO avoidance for the CS insert fabrication

Sugimoto, Makoto; Isono, Takaaki; Koizumi, Norikiyo; Nakajima, Hideo; Kato, Takashi; Hamada, Kazuya; Nunoya, Yoshihiko; Matsui, Kunihiro; Sawada, Kenji*; Takahashi, Yoshikazu; et al.

IEEE Transactions on Applied Superconductivity, 9(2), p.636 - 639, 1999/06

 Times Cited Count:1 Percentile:82.19(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Development of the CS insert coil

Sugimoto, Makoto; *; Isono, Takaaki; Koizumi, Norikiyo; Nakajima, Hideo; Kato, Takashi; Nunoya, Yoshihiko; Matsui, Kunihiro; Takahashi, Yoshikazu; Ando, Toshinari; et al.

Proc. of 15th Int. Conf. on Magnet Technology (MT-15), p.409 - 412, 1997/00

no abstracts in English

Journal Articles

Design of the CS insert coil

Sugimoto, Makoto; *; Isono, Takaaki; Koizumi, Norikiyo; Nakajima, Hideo; Kato, Takashi; Nishi, Masataka; Takahashi, Yoshikazu; Ando, Toshinari; Tsuji, Hiroshi; et al.

IEEE Transactions on Magnetics, 32(4), p.2328 - 2331, 1996/07

 Times Cited Count:6 Percentile:48.11(Engineering, Electrical & Electronic)

no abstracts in English

Journal Articles

Delayed integral counting method for rod drop experiments

Kaneko, Yoshihiko*; Yamane, Tsuyoshi; Shimakawa, Satoshi; Yamashita, Kiyonobu

Nippon Genshiryoku Gakkai-Shi, 38(11), p.907 - 911, 1996/00

 Times Cited Count:0 Percentile:100(Nuclear Science & Technology)

no abstracts in English

Oral presentation

Test results of CS insert for ITER; Test method

Isono, Takaaki; Kawano, Katsumi; Ozeki, Hidemasa; Saito, Toru; Nabara, Yoshihiro; Suwa, Tomone; Shimono, Mitsugu; Ebisawa, Noboru; Sato, Minoru; Uno, Yasuhiro; et al.

no journal, , 

JAEA is procuring conductors for ITER Central Solenoid (CS) and has evaluated its superconducting performance using CS Model Coil Test facility. We measured Tcs values during cyclic charge of 16,000 cycles and warm-up and cool-down cycle of 3 times. And we measured effect of coil deformation by electro-magnetic force on Tcs values and performed quench test. In this presentation, test method will be reported.

Oral presentation

Inductive heating test of ITER CS insert coil

Ozeki, Hidemasa; Suwa, Tomone; Isono, Takaaki; Takahashi, Yoshikazu; Kawano, Katsumi; Nabara, Yoshihiro; Saito, Toru; Nunoya, Yoshihiko

no journal, , 

no abstracts in English

18 (Records 1-18 displayed on this page)
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