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Nakajima, Hideo; Takano, Katsutoshi; Tsutsumi, Fumiaki; Kawano, Katsumi; Hamada, Kazuya; Okuno, Kiyoshi
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no abstracts in English
Nakajima, Hideo; Hamada, Kazuya; Abe, Kanako*; Takano, Katsutoshi; Tsutsumi, Fumiaki; Kawano, Katsumi; Okuno, Kiyoshi
no journal, ,
no abstracts in English
Okuno, Kiyoshi
no journal, ,
no abstracts in English
Takano, Katsutoshi; Tsutsumi, Fumiaki; Kawano, Katsumi; Hamada, Kazuya; Nakajima, Hideo; Okuno, Kiyoshi
no journal, ,
no abstracts in English
Sugimoto, Makoto; Kitamura, Kazunori; Okuno, Kiyoshi
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no abstracts in English
Tsunematsu, Toshihide
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The ITER site was decided to be Cadarashe, France at the minister's meeting held in Moscaw in June. After that six Parties, EU, Japan, China, Korea and the US, restarted the works for finalizing the Agreement for establishing the International Organization and its related documents. The presentation will include the process of the works and technical preparation for the start of the construction.
Isono, Takaaki; Koizumi, Norikiyo; Nunoya, Yoshihiko; Hamada, Kazuya; Nabara, Yoshihiro; Okuno, Kiyoshi
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no abstracts in English
Isono, Takaaki; Nabara, Yoshihiro; Nunoya, Yoshihiko; Okuno, Kiyoshi
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no abstracts in English
Takahashi, Yoshikazu; Yoshida, Kiyoshi; Nabara, Yoshihiro; Edaya, Masahiro*
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Quench tests of Center Solenoid (CS) insert in both DC and pulse modes have been carried out with various initial conditions in the Center Solenoid Model Coil Facility, in order to investigate the CS conductor behavior during a quench. The conductor of the coil is cable-in-conduit conductors with Nb
Sn strands and has similar design and configuration to the conductor for the ITER Central Solenoid. The length of the conductor of the CS insert is about 140 m. Simulations of electric, thermal and hydraulic behavior of the conductor during quench tests in the pulse mode were carried out by using the "Gandalf" simulation code. The quench currents obtained by the simulation agree to the experimental results within 10%. The implication for quench detection in ITER is also discussed and it is confirmed that the maximum temperature of the ITER-CS conductor during a quench is 132K and lower than the design criteria (
150 K) with enough margin. The ITER-CS will not have serious damages during a quench.
Nunoya, Yoshihiko; Isono, Takaaki; Koizumi, Norikiyo; Hamada, Kazuya; Nabara, Yoshihiro; Okuno, Kiyoshi
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no abstracts in English
Hasegawa, Mitsuru*; Takayanagi, Tadatoshi*; Ichihara, Tadashi*; Sugimoto, Makoto; Isono, Takaaki; Okuno, Kiyoshi
no journal, ,
no abstracts in English
Al CIC conductor measured with spring methodKizu, Kaname; Ando, Toshinari*; Tsuchiya, Katsuhiko; Shimada, Katsuhiro; Matsukawa, Makoto; Tamai, Hiroshi; Koizumi, Norikiyo; Okuno, Kiyoshi; Nishimura, Arata*; Hishinuma, Yoshimitsu*; et al.
no journal, ,
no abstracts in English
Ando, Toshinari*; Nishio, Satoshi
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no abstracts in English
Makida, Yasuhiro*; Iida, Masahisa*; Ohata, Hirokatsu*; Okamura, Takahiro*; Ogitsu, Toru*; Kimura, Nobuhiro*; Tanaka, Kenichi*; Nakamoto, Tatsushi*; Yamamoto, Akira*; Idesaki, Akira; et al.
no journal, ,
A Superconducting magnet system will be adopted for the J-PARC neutrino beam line. Since the magnet system will be exposed to high radiation field, the radiation resistance of a cryostat is very important. We have developed radio-proof control valve and relief valve by selection of some parts and separation of the positioner. In this work, the developed valves were worked under the 
ray irradiation, and it was found that the valves show the radiation resistance above 1MGy.
-ray irradiation effects on organic materials at 77 KNakamoto, Tatsushi*; Ohata, Hirokatsu*; Ogitsu, Toru*; Kimura, Nobuhiro*; Makida, Yasuhiro*; Yamamoto, Akira*; Idesaki, Akira; Ito, Hisayoshi; Morishita, Norio
no journal, ,
A Superconducting magnet system will be adopted for the J-PARC neutrino beam line. GFRPs whose matrices are phenol resin and epoxy resin, and polyimides are used as structural materials and electrical insulation. Radiation resistance of these polymeric materials is very important, because they are exposed to high radiation field. In this work, specimens were irradiated by rays with the maximum dose beyond 10MGy at liquid nitrogen temperature (77K), and the properties of gas evolution and mechanical strength were investigated. It was verified experimentally that the polymeric materials have sufficient radiation resistance for the using in the J-PARC neutrino beam line.