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Yokomura, Ryota*; Goto, Masataka*; Yoshida, Takehito*; Warisawa, Shinichi*; Hanari, Toshihide; Kawabata, Kuniaki; Fukui, Rui*
IEEE Robotics and Automation Letters (Internet), 9(4), p.3275 - 3282, 2024/04
To reduce errors in the remote control of robots during decommissioning, we developed a Rail DRAGON, which enables continuous observation of the work environment. The Rail DRAGON is constructed by assembling and pushing a long rail structure inside the primary containment vessel (PCV), and then repeatedly deploying several monitoring robots on the rails to enable constant observation in a high-radiation environment. In particular, we have developed the following components of Rail DRAGON: bendable rail modules, straight rail modules, a basement unit, and monitoring robots. Concretely, this research proposes and demonstrates a method to realize an ultralong articulated structure with high portability and workability. In addition, it proposes and verifies the feasibility of a method for deploying observation equipment that can be easily deployed and replaced, while considering disposal.
Nishio, Kazuhisa; Matsuoka, Toshiyuki; Mikake, Shinichiro; Tsuruta, Tadahiko; Amano, Kenji; Oyama, Takuya; Takeuchi, Ryuji; Saegusa, Hiromitsu; Hama, Katsuhiro; Yoshida, Haruo*; et al.
JAEA-Review 2009-001, 110 Pages, 2009/03
JAEA-Review-2009-001.pdf:49.84MB
Japan Atomic Energy Agency (JAEA) at Tono Geoscience Center (TGC) is developing a geoscientific research project named Mizunami Underground Research Laboratory (MIU) project in crystalline rock environment in order to establish scientific and technological basis for geological disposal of HLW. Geoscientific research at MIU is planned to be carried out in three phases over a period of 20 years; Surface-based Investigation Phase (Phase 1), Construction Phase (Phase 2) and Operation Phase (Phase 3). Currently, the project is under the Construction Phase. This document presents the following results of the research and development performed in 2006 fiscal year, as a part of the Construction Phase based on the MIU Master Plan updated in 2002, (1) Investigation at the MIU Construction Site, (2) Construction at the MIU Construction Site, (3) Research Collaboration.
Nishio, Kazuhisa; Matsuoka, Toshiyuki; Mikake, Shinichiro; Tsuruta, Tadahiko; Amano, Kenji; Oyama, Takuya; Takeuchi, Ryuji; Saegusa, Hiromitsu; Hama, Katsuhiro; Yoshida, Haruo*; et al.
JAEA-Review 2008-073, 99 Pages, 2009/03
JAEA-Review-2008-073-1.pdf:37.33MBJAEA-Review-2008-073-2.pdf:37.16MB
Japan Atomic Energy Agency (JAEA) at Tono Geoscience Center (TGC) is developing a geoscientific research project named Mizunami Underground Research Laboratory (MIU) project in crystalline rock environment in order to establish scientific and technological basis for geological disposal of HLW. Geoscientific research at MIU is planned to be carried out in three phases over a period of 20 years; Surface-based Investigation Phase (Phase 1), Construction Phase (Phase 2) and Operation Phase (Phase 3). Currently, the project is under the Construction Phase. This document presents the following results of the research and development performed in 2005 fiscal year, as a part of the Construction Phase based on the MIU Master Plan updated in 2002, (1) Investigation at the MIU Construction Site, (2) Construction at the MIU Construction Site, (3) Research Collaboration.
Yoshida, Hiroshi; Glugla, M.*; Hayashi, Takumi; L
sser, R.*; Murdoch, D.*; Nishi, Masataka; Haange, R.*
Fusion Engineering and Design, 61-62, p.513 - 523, 2002/11
Times Cited Count：28 Percentile：84.16(Nuclear Science & Technology)ITER tritium plant is composed of tokamak fuel cycle systems, tritium confinement and detritation systems. The tokamak fuel cycle systems, composed of various tritium sumsystems such as vacuum vessel cleaning gas processing, tokamak exhaust processing, hydrogen isotope separation, fuel storage, mixing and delivery, and external tritium receiving and long-term storage, has been designed to meet not only ITER operation scenarios but safety requirements (minimization of equipment tritium inventory and reduction of environmental tritium release at different off-normal events and accident scenarios). Multiple confinement design was employed because tritium easily permeates through metals (at 
150 
C) and plastics (at ambient temperature) and mixed with moisture in room air. That is, tritium process equipment and piping are designed to be the primary confinement barrier, and the process equipments (tritium inventory 1 g) are surrounded by the secondary confinement barrier such as a glovebox. Tritium process rooms, which contains these facilities, form the tertiary confinement barrier, and equipped with emergency isolation valves in the heating ventillation and air conditioning ducts as well as atmosphere detritiation systems. This confinement approach has been applied to tokamak building, tritium building, and hotcell and radwaste building.
Iwai, Yasunori; Misaki, Yonosuke*; Hayashi, Takumi; Yamanishi, Toshihiko; Konishi, Satoshi; Nishi, Masataka; Ninomiya, R.*; Yanagimachi, S.*; Senrui, S.*; Yoshida, Hiroshi
Fusion Science and Technology, 41(3), p.1126 - 1130, 2002/05
no abstracts in English
Iwai, Yasunori; Yoshida, Hiroshi; Yamanishi, Toshihiko; Senrui, S.*; Nishi, Masataka
Fusion Engineering and Design, 49-50, p.847 - 853, 2000/11
Times Cited Count：15 Percentile：68.65(Nuclear Science & Technology)no abstracts in English
Zhidkov, A. G.; Sasaki, Akira; Utsumi, Takayuki*; Fukumoto, Ichiro; Tajima, Toshiki; Saito, Fumikazu*; Hironaka, Yoichiro*; Nakamura, Kazutaka*; Kondo, Kenichi*; Yoshida, Masataka*
Physical Review E, 62(5), p.7232 - 7240, 2000/11
Times Cited Count：51 Percentile：85.94(Physics, Fluids & Plasmas)no abstracts in English
Nakamura, Hirofumi; Hayashi, Takumi; Suzuki, Takumi; Yoshida, Hiroshi*; Nishi, Masataka
JAERI-Research 2000-044, 24 Pages, 2000/10
JAERI-Research-2000-044.pdf:0.97MB
no abstracts in English
Sn superconducting wire and large current conductorIsono, Takaaki; Nunoya, Yoshihiko; Matsui, Kunihiro; Sugimoto, Makoto; Yoshida, Kiyoshi; Nishi, Masataka; Takahashi, Yoshikazu; Ando, Toshinari; Tsuji, Hiroshi; Shimamoto, Susumu*
Denki Gakkai Rombunshi, B, 119(11), p.1263 - 1269, 1999/00
no abstracts in English
Yamanishi, Toshihiko; Iwai, Yasunori; Nishi, Masataka; Yoshida, Hiroshi
Fusion Technology, 34(3), p.531 - 535, 1998/11
no abstracts in English
Sn strands for the International Thermonuclear Experimental Reactor (ITER) in JapanIsono, Takaaki; Nishi, Masataka; Nunoya, Yoshihiko; Yoshida, Kiyoshi; Tsuji, Hiroshi
Teion Kogaku, 32(4), p.150 - 157, 1997/00
no abstracts in English
Sn strands by internal tin diffusion prosess for the ITER project*; Kubo, Yoshio*; *; *; *; *; *; Isono, Takaaki; Nunoya, Yoshihiko; Yoshida, Kiyoshi; et al.
Teion Kogaku, 32(4), p.173 - 180, 1997/00
no abstracts in English
Sn wires for the ITER*; *; *; *; *; Nishi, Masataka; Yoshida, Kiyoshi; Isono, Takaaki; Tsuji, Hiroshi
Teion Kogaku, 32(4), p.167 - 172, 1997/00
no abstracts in English
Sn strand with low AC loss and high critical-current density for the ITEREndo, Sakaru*; *; *; *; *; *; *; Nishi, Masataka; Isono, Takaaki; Nunoya, Yoshihiko; et al.
Teion Kogaku, 32(4), p.158 - 166, 1997/00
no abstracts in English
Yoshida, Kiyoshi; Nishi, Masataka; Tsuji, Hiroshi; Sasaki, Takashi*; Yasukawa, Yukio*; Tsukamoto, Hideo*; *; *; *; Hasegawa, Mitsuru*
Nihon Genshiryoku Gakkai-Shi, 37(10), p.938 - 947, 1995/00
Times Cited Count：2 Percentile：28.12(Nuclear Science & Technology)no abstracts in English
Sugimoto, Makoto; Isono, Takaaki; Koizumi, Norikiyo; Takahashi, Yoshikazu; Nishi, Masataka; Okuno, Kiyoshi; Yoshida, Kiyoshi; Nakajima, Hideo; Ando, Toshinari; Hosono, Fumikazu*; et al.
IEEE Transactions on Magnetics, 30(4), p.2042 - 2045, 1994/07
Times Cited Count：1 Percentile：24.71(Engineering, Electrical & Electronic)no abstracts in English
Sn demo poloidal coil(DPC-EX)Ando, Toshinari; Nakajima, Hideo; *; Hiyama, Tadao; Takahashi, Yoshikazu; Nishi, Masataka; Yoshida, Kiyoshi; Okuno, Kiyoshi; Kato, Takashi; Sugimoto, Makoto; et al.
Advances in Cryogenic Engineering, Vol.39, 0, p.335 - 341, 1994/00
no abstracts in English
Sn superconducting coils in JAERI Demo Poloidal Coil ProjectOkuno, Kiyoshi; Takahashi, Yoshikazu; Tsuji, Hiroshi; Ando, Toshinari; Nishi, Masataka; Yoshida, Kiyoshi; Sugimoto, Makoto; Koizumi, Norikiyo; Hosono, Fumikazu*; *
IEEE Transactions on Applied Superconductivity, 3(1), p.602 - 605, 1993/03
Times Cited Count：5 Percentile：50.21(Engineering, Electrical & Electronic)no abstracts in English
Takahashi, Yoshikazu; Koizumi, Norikiyo; *; Okuno, Kiyoshi; Nishi, Masataka; Isono, Takaaki; Yoshida, Kiyoshi; Sugimoto, Makoto; Kato, Takashi; *; et al.
IEEE Transactions on Applied Superconductivity, 3(1), p.610 - 613, 1993/03
Times Cited Count：12 Percentile：69.71(Engineering, Electrical & Electronic)no abstracts in English
Hosono, Fumikazu*; Sugimoto, Makoto; Tsukamoto, Hideo*; Oshikiri, Masayuki*; Hanawa, Hiromi*; Seki, Shuichi*; *; Koizumi, Norikiyo; Isono, Takaaki; Takahashi, Yoshikazu; et al.
IEEE Transactions on Applied Superconductivity, 3(1), p.535 - 538, 1993/03
Times Cited Count：1 Percentile：23.77(Engineering, Electrical & Electronic)no abstracts in English
