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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

The charge test of Central Solenoid Model Coil(CSMC) and Toroidal Field Insert Coil(TFIC) were carried out fo about one month from September 2001 with international collaboration under ITER EDA. In the experiment, Acoustic Emission(AE) signals were measured which were induced from CSMC and TFIC. It was the first trial to measure the AE signals from the insert coil directly. Relations among AE signals from TFIC, intensity, number and voltages are discussed in this paper.

Journal Articles

Development of ITER toroidal field insert; International collaboration with Russia

Sugimoto, Makoto; Nakajima, Hideo; Kato, Takashi; Okuno, Kiyoshi; Tsuji, Hiroshi; Rodin, I.*; Egorov, S. A.*

Teion Kogaku, 37(10), p.513 - 522, 2002/10

The Central Solenoid (CS) model coil programme has been carrying out since 1992 as a back born project in International Thermonuclear Experimental Reactor (ITER) Engineering Design Activity (EDA). The CS model coil programme has a plan to develop the toroidal fieled (TF) insert to demonstrate the conductor performance of ITER real TF coils under 13 T of magnetic flux density. The fabrication of TF insert was completed on May 2001 by D.V.Efremov Scientific Research Institute for Electrophysical Apparatus(Efremov institute) at St. Petersburg, Russia. Experiments including the cooldown and warmup were completed November 2001 at JAERI Naka. TF insert was achieved to charge up to 13T with 46kA without training under the back up magnetic field by the CS model coil.

Journal Articles

Hydraulic characteristics of ITER TF insert coil; Electromagnetic force effect on hydraulic performance

Hamada, Kazuya; Kawano, Katsumi; Matsui, Kunihiro; Kato, Takashi; Sugimoto, Makoto; Hara, Eiji*; Okuno, Kiyoshi; Egorov, S. A.*; Rodin, I.*; Sytnikov, V. E.*; et al.

Teion Kogaku, 37(10), p.531 - 538, 2002/10

In the Engineering Design Activities of the International Thermonuclear Experimental Reactor (ITER), Toroidal Field (TF) Insert have been developed and tested successfully. In the experiment, pressure drop performance of TF insert was investigated. There were two purposes for the investigation. One is to verify the pressure drop prediction using correlations proposed by various researchers. Second is to observe a behavior of pressure drop under the electromagnetic force. The pressure drops of TF insert decreased by around 12% during current-carrying operation of 46kA at 13T. After several current-carrying operation, the friction factor of TF insert has finally reached a value which is around 12% lower than that of virgin state and was not recovered even if there were zero current. It is considered that a deformation of cable cross section inside the conductor jacket appears due to electromagnetic force and a new flow path in the jacket is generated.

Journal Articles

Quench characteristics and AC loss measurement in the ITER TF insert

Isono, Takaaki; Koizumi, Norikiyo; Matsui, Kunihiro; Sugimoto, Makoto; Hamada, Kazuya; Nunoya, Yoshihiko; Rodin, I.*; CS Model Coil Test Group

Teion Kogaku, 37(10), p.539 - 544, 2002/10

The Toroidal Field (TF) insert has been developed by Russia to demonstrate the TF conductor performance and tested in the bore of the Central Solenoid (CS) model coil, which applies a 13-T magnetic field. In this paper, quench property and AC loss measurement is described. Major difference between TF and CS conductor is the jacket shape and existence of mandrel and they effect on quench property and AC loss measurement. Quench test was performed at 46kA, 12T, 6.5K and the currents of the TF insert and the CS model coil were kept for 9 seconds after normal zone appearance. An inductive heater of 200mm length made a quench. Normal zone length was 16m, and the maximum velocity was 2m/s. Maximum temperature is estimated to be 160 K with some errors. Hysteresis loss was measured by calorimetric method and the values are almost same as the expected values from strand data. It was pointed out that coupling loss measurement using calorimetric method is difficult because loss at the mandrel is more than 10 times higher than coupling loss.

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.

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


no abstracts in English

Oral presentation

Fabrication of insert coil with ITER TF conductor

Ozeki, Hidemasa; Isono, Takaaki; Kawano, Katsumi; Saito, Toru; Kawasaki, Tsutomu; Nishino, Katsumi; Okuno, Kiyoshi; Kido, Shuichi*; Semba, Tomoyuki*; Suzuki, Yozo*; et al.

no journal, , 

no abstracts in English

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