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Journal Articles

ITER magnet systems; From qualification to full scale construction

Nakajima, Hideo; Hemmi, Tsutomu; Iguchi, Masahide; Nabara, Yoshihiro; Matsui, Kunihiro; Chida, Yutaka; Kajitani, Hideki; Takano, Katsutoshi; Isono, Takaaki; Koizumi, Norikiyo; et al.

Proceedings of 24th IAEA Fusion Energy Conference (FEC 2012) (CD-ROM), 8 Pages, 2013/03

The ITER organization and 6 Domestic Agencies (DA) have been implementing the construction of ITER superconducting magnet systems. Four DAs have already started full scale construction of Toroidal Field (TF) coil conductors. The qualification of the radial plate manufacture has been completed, and JA and EU are ready for full scale construction. JA has qualified full manufacturing processes of the winding pack with a 1/3 prototype and made 2 full scale mock-ups of the basic segments of TF coil structure to optimize and industrialize the manufacturing process. Preparation and qualification of the full scale construction of the TF coil winding is underway by EU. Procurement of the manufacturing equipment is near completion and qualification of manufacturing processes has already started. The constructions of other components of the ITER magnet systems are also going well towards the main goal of the first plasma in 2020.

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

Structure of the 11/2$$^{-}$$ analog state in $$^{91}$$Nb populated by the $$^{90}$$Zr($$alpha$$, t) reaction

Van der Molen, H. K. T.*; Akimune, Hidetoshi*; Van den Berg, A. M.*; Daito, Izuru*; Fujimura, Hisako*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Harakeh, M. N.*; Ihara, F.*; Inomata, Toru*; et al.

Physics Letters B, 502(1-4), p.1 - 8, 2001/03

 Times Cited Count:3 Percentile:28.74(Astronomy & Astrophysics)

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