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Nishimura, Arata*; Muroga, Takeo*; Takeuchi, Takao*; Nishitani, Takeo; Morioka, Atsuhiko
Fusion Engineering and Design, 81(8-14), p.1675 - 1681, 2006/02
Times Cited Count：3 Percentile：23.71(Nuclear Science & Technology)In a fusion reactor plant, a neutral beam injector (NBI) will be operated for a long time, and it will allow neutron streaming from NBI ports to outside of the plasma vacuum vessel. It requires the superconducting magnet to develop nuclear technology to produce stable magnetic field and to reduce activation of the magnet components. In this report, the back ground of the necessity and the contents of the nuclear technology of the superconducting magnets for fusion application are discussed and some typical investigation results are presented, which are the neutron irradiation effect on Nb
Sn wire, the development of low activation superconducting wire, and the design concept to reduce nuclear heating and nuclear transformation by streaming. In addition, recent activities in high energy particle physics are introduced and potential ripple effect of the technology of the superconducting magnets is described briefly.
Sasa, Toshinobu; Yang, J. A.*; Oigawa, Hiroyuki
Radiation Protection Dosimetry, 116(1-4), p.256 - 258, 2005/12
Times Cited Count：0 Percentile：0.00(Environmental Sciences)The proton beam duct of the accelerator-driven system (ADS) acts a streaming path for spallation neutrons and photons and causes the activation of the magnets and other devices above the subcritical core. We have performed a streaming analysis at the upper section of the lead-bismuth target/cooled ADS (800MWth). MCNPX was used to calculate the radiation dose from streamed neutrons and photons through the beam duct. For the secondary photon production calculation, cross sections for several actinides were substituted for plutonium because of the lack of gamma production cross section. From the results of this analysis, the neutron dose from the beam duct is about 20 orders higher than that of the bulk shield. The magnets and shield plug were heavily irradiated by streaming neutrons according to the DCHAIN-SP analysis.
Oguri, Tomomi*; Nakashima, Hiroshi; Tanaka, Susumu; JAERI-University Collaboration Group for Accelerator Shielding Study
Journal of Nuclear Science and Technology, 41(Suppl.4), p.54 - 57, 2004/03
In shielding design of proton accelerator facilities, it applies simplified formulae and Monte Carlo calculation methods to calculation radiation streaming of access way and duct. A radiation streaming experiment was carried out in order to validate accuracy of intermediate energy region in labyrinth of access way connected to the 1st heavy ion room in TIARA at JAERI. In this paper, it is described comparing of measured data and calculations by MCNP-4B Monte Carlo code and simplified formulae. In Monte Carlo calculations, HILO86 constant set and LA150 was used for cross section data. The results of this experimental analysis show the accuracy of 50% errors for Monte Carlo calculations overall and a factor of 3 for simplified formulae. So applicability for these calculation methods in region of intermediate energy is validated.
Tanaka, Susumu; Nakashima, Hiroshi; Sakamoto, Yukio; Nakane, Yoshihiro; Meigo, Shinichiro; Tanaka, Shunichi; Nakamura, Takashi*; Takada, Masashi*; Kurosawa, Tadahiro*; Hirayama, Hideo*; et al.
Health Physics, 81(4), p.406 - 418, 2001/10
Times Cited Count：5 Percentile：38.50(Environmental Sciences)no abstracts in English
Shibata, Keiichiro*; Maki, Koichi*; Inoue, Takashi*; Hanada, Masaya; Okumura, Yoshikazu; Yamashita, Y.*
Fusion Engineering and Design, 51-52, p.357 - 362, 2000/11
Times Cited Count：1 Percentile：11.90(Nuclear Science & Technology)no abstracts in English
Seki, Yasushi; Mori, Seiji*; Nishio, Satoshi; Ueda, Shuzo; Kurihara, Ryoichi
Journal of Nuclear Science and Technology, 37(Suppl.1), p.268 - 275, 2000/03
no abstracts in English
; Nakane, Yoshihiro; Sakamoto, Yukio; Nakashima, Hiroshi; Meigo, Shinichiro; Tanaka, Shunichi; Kurosawa, Tadahiro*; Nakamura, Takashi*; Nakao, Noriaki*; Hirayama, Hideo*; et al.
Proc. of 1998 ANS Radiat. Protection and Shielding Division Topical Conf. Technol. for the New Century, 2, p.164 - 169, 1998/00
no abstracts in English
Sato, Satoshi; Takatsu, Hideyuki; Seki, Yasushi;
J. Fusion Eng. Des., 30(3), p.1129 - 1133, 1996/12
no abstracts in English
Tanaka, Susumu; Nakashima, Hiroshi; Nakane, Yoshihiro; Sakamoto, Yukio; Meigo, Shinichiro; Tanaka, Shunichi; Takada, Masashi*; Kurosawa, Tadahiro*; Nakamura, Takashi*; Nakao, Noriaki*; et al.
Genshikaku Kenkyu, 41(3), p.101 - 112, 1996/06
no abstracts in English
Sato, Satoshi; ; Seki, Yasushi; Takatsu, Hideyuki; Mori, Seiji*; Kuroda, Toshimasa*; S.Zimin*
JAERI-M 93-093, 29 Pages, 1993/03
no abstracts in English
S.Zimin*
JAERI-M 92-120, 212 Pages, 1992/08
no abstracts in English
;
Journal of Nuclear Science and Technology, 24(1), p.1 - 11, 1987/01
Times Cited Count：6 Percentile：55.28(Nuclear Science & Technology)no abstracts in English
; Iida, Hiromasa; R.T.Santoro*; ;
Transactions of the American Nuclear Society, 38, p.555 - 557, 1981/00
no abstracts in English
