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Isaka, Koji; Suwa, Masayuki; Kimura, Kazuya; Suzuki, Makoto; Ikekame, Yoshinori; Nagadomi, Hideki
JAEA-Technology 2021-039, 48 Pages, 2023/02
JAEA-Technology-2021-039.pdf:6.97MB
JRR-3 Process control system is used from the initial criticality (1990) after remodeling JRR- 3 as equipment used for monitoring and control of flow rate, temperature, pressure, water level, etc. of coolant and operation of nuclear reactor equipment, and it became necessary to renew as the aging progressed and spare parts could not be obtained sufficiently. Upon renewal, from the viewpoint of ensuring conservation of the core such as decay heat removal and minimizing the impact on reactor users and minimizing costs, it is important not to stop long-term reactor shutdown we planned to divide it into three stages and make it on a continuous basis. This report summarizes the renewal plan and renewal work divided into three stages.
Nakayama, Masashi; Saiga, Atsushi; Kimura, Shun; Mochizuki, Akihito; Aoyagi, Kazuhei; Ono, Hirokazu; Miyakawa, Kazuya; Takeda, Masaki; Hayano, Akira; Matsuoka, Toshiyuki; et al.
JAEA-Research 2019-013, 276 Pages, 2020/03
JAEA-Research-2019-013.pdf:18.72MB
The Horonobe Underground Research Laboratory (URL) Project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of relevant disposal technologies for geological disposal of High-level Radioactive Waste through investigations of the deep geological environment within the host sedimentary rock at Horonobe Town in Hokkaido, north Japan. The investigations will be conducted in three phases, namely "Phase 1: Surface based investigations", "Phase 2: Construction phase" (investigations during construction of the underground facilities) and "Phase 3: Operation phase" (research in the underground facilities). According to the research plan described in the 3rd Mid- and Long- term Plan of JAEA, "Near-field performance study", "Demonstration of repository design option", and "Verification of crustal-movement buffering capacity of sedimentary rocks" are important issues of the Horonobe URL Project, and schedule of future research and backfill plans of the project will be decided by the end of 2019 Fiscal Year. The present report summarizes the research and development activities of these 3 important issues carried out during 3rd Medium to Long-term Research Phase.
Nakanii, Nobuhiko*; Kondo, Kiminori; Kuramitsu, Yasuhiro*; Mori, Yoshitaka*; Miura, Eisuke*; Tsuji, Kazuki*; Kimura, Kazuya*; Fukumochi, Shuji*; Kashihara, Mamoru*; Tanimoto, Tsuyoshi*; et al.
Applied Physics Letters, 93(8), p.081501_1 - 081501_3, 2008/08
Times Cited Count：4 Percentile：18.74(Physics, Applied)Energetic electrons were generated by the interaction of a high-intensity laser pulse with a plasma preformed from a hollow plastic cylinder via laser-driven implosion. The spectra of a comparatively high-density plasma had a bump around 10 MeV. Simple numerical calculations explained the spectra obtained in this experiment. This indicates that the plasma tube has sufficient potential to convert a Maxwellian spectrum to a comparatively narrow spectrum.
Yokoo, Kenji; Horiguchi, Hironori; Yagi, Masahiro; Nagadomi, Hideki; Yamamoto, Kazuyoshi; Sasajima, Fumio; Oyama, Koji; Ishikuro, Yasuhiro; Sasaki, Tsutomu; Hirane, Nobuhiko; et al.
JAEA-Technology 2007-018, 104 Pages, 2007/03
JAEA-Technology-2007-018.pdf:5.92MB
Reactor operation training using JRR-4 (Japan Research Reactor No.4) was started in FY 1969, one of the curriculums of Nuclear Technology and Education Center (NuTEC). After that, the program was updated and carried out for reactor operation training, control rod calibration, and measurement of various kind of characteristics. JRR-4 has been contributed for nuclear engineer training that is over 1,700 trainees from bother domestic and foreign countries. JRR-4 can be used for experiment from zero power to 3500kW, and the trainees can make experience to operate the reactor from start up to shut down, not only zero-power experiments (critical approach, control rod calibration, reactivity measurement, etc.) but also other experiments under high power operation (xenon effect, temperature effects, reactor power calibration, etc.). This report is based on various kinds of guidance texts using for training, and collected for operation and experiments for reactor physics.
Kawashima, Hisato; Sengoku, Seio; Uehara, Kazuya; Tamai, Hiroshi; Shoji, Teruaki*; Ogawa, Hiroaki; Shibata, Takatoshi; Yamamoto, Masahiro*; Miura, Yukitoshi; Kusama, Yoshinori; et al.
Fusion Science and Technology, 49(2), p.168 - 186, 2006/02
Times Cited Count：3 Percentile：24.08(Nuclear Science & Technology)Experimental efforts on JFT-2M have been devoted to understand SOL/Divertor plasmas and to investigate power and particle controllability. Open divertor configuration was used for the first decade of JFT-2M started in 1984. We found out the SOL/Divertor plasma properties such as in/out asymmetry, heat and particle diffusivities, and SOL current at ELMs. Handling of power and particle was demonstrated by active control methods such as local pumping, edge ergodization, divertor biasing, and edge heating. For improvement of power and particle control capability of divertor, it was modified to closed configuration in 1995, which demonstrated the baffling effects with narrower divertor throat. Dense and cold divertor state (n
= 4
10
m
and T = 4 eV), compatible with the improved confinement modes (e.g. H-mode), was realized by strong gas puffing. Being related with the core confinement at H-mode, the edge plasma fluctuations were identified by an electrostatic probe. These are reviewed in this paper.
Tsuzuki, Kazuhiro*; Kimura, Haruyuki; Kusama, Yoshinori; Sato, Masayasu; Kawashima, Hisato; Kamiya, Kensaku; Shinohara, Koji; Ogawa, Hiroaki; Uehara, Kazuya; Kurita, Genichi; et al.
Fusion Science and Technology, 49(2), p.197 - 208, 2006/02
Times Cited Count：11 Percentile：60.11(Nuclear Science & Technology)no abstracts in English
Tsuzuki, Kazuhiro; Kimura, Haruyuki; Kawashima, Hisato; Sato, Masayasu; Kamiya, Kensaku; Shinohara, Koji; Ogawa, Hiroaki; Hoshino, Katsumichi; Bakhtiari, M.; Kasai, Satoshi; et al.
Nuclear Fusion, 43(10), p.1288 - 1293, 2003/10
Times Cited Count：39 Percentile：74(Physics, Fluids & Plasmas)no abstracts in English
Nagata, M.*; Fukumoto, Naoyuki*; Ogawa, Hiroaki; Ogawa, Toshihide; Uehara, Kazuya; Niimi, Hironobu*; Shibata, Takatoshi; Suzuki, Yoshio; Miura, Yukitoshi; Kayukawa, Naoyuki*; et al.
Nuclear Fusion, 41(11), p.1687 - 1694, 2001/11
Times Cited Count：12 Percentile：38.17(Physics, Fluids & Plasmas)no abstracts in English
Kamiya, Kensaku; Kimura, Haruyuki; Hoshino, Katsumichi; Isei, Nobuaki; Kawashima, Hisato; Ogawa, Hiroaki; Ogawa, Toshihide; Tsuzuki, Kazuhiro; Uehara, Kazuya; JFT-2M Group
Review of Scientific Instruments, 72(7), p.2931 - 2935, 2001/07
Times Cited Count：6 Percentile：40.19(Instruments & Instrumentation)no abstracts in English
Sato, Masayasu; Kawashima, Hisato; Miura, Yukitoshi; Tsuzuki, Kazuhiro; Kimura, Haruyuki; Uehara, Kazuya; Ogawa, Toshihide; Isei, Nobuaki; Tani, Takashi; Akiyama, Takashi*; et al.
Fusion Engineering and Design, 51-52(Part.B), p.1071 - 1076, 2000/11
Times Cited Count：15 Percentile：68.6(Nuclear Science & Technology)no abstracts in English
Kawashima, Hisato; Sato, Masayasu; Tsuzuki, Kazuhiro; Miura, Yukitoshi; Kimura, Haruyuki; Tani, Takashi; Ido, Tsuyoshi; Isei, Nobuaki; Ogawa, Toshihide; Uehara, Kazuya; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 76(6), p.585 - 592, 2000/06
no abstracts in English
Kimura, Haruyuki; Kawashima, Hisato; Tsuzuki, Kazuhiro; Sato, Masayasu; Miura, Yukitoshi; Isei, Nobuaki; Ido, Takeshi*; Ogawa, Toshihide; Uehara, Kazuya; JFT-2M Group
JAERI-Conf 2000-004, p.77 - 80, 2000/03
no abstracts in English
Tsuzuki, Kazuhiro; Sato, Masayasu; Kawashima, Hisato; Miura, Yukitoshi; Kimura, Haruyuki; Abe, Tetsuya; Uehara, Kazuya; Ogawa, Toshihide; Akiyama, Takashi*; Shibata, Takatoshi; et al.
Journal of Nuclear Materials, 283-287, p.681 - 684, 2000/00
Times Cited Count：12 Percentile：62.12(Materials Science, Multidisciplinary)no abstracts in English
Kawashima, Hisato; Sengoku, Seio; Ogawa, Toshihide; Ogawa, Hiroaki; Uehara, Kazuya; Miura, Yukitoshi; Kimura, Haruyuki; JFT-2M Group
Nuclear Fusion, 39(11Y), p.1679 - 1686, 1999/00
Times Cited Count：15 Percentile：46.56(Physics, Fluids & Plasmas)no abstracts in English
Uehara, Kazuya; Ikeda, Yoshitaka; Saigusa, Mikio; Sakamoto, Keishi; Fujii, Tsuneyuki; Maebara, Sunao; Tsuneoka, Masaki; Seki, Masami; Moriyama, Shinichi; Kobayashi, Noriyuki*; et al.
Fusion Engineering and Design, 19(1), p.29 - 40, 1992/07
Times Cited Count：1 Percentile：17.24(Nuclear Science & Technology)no abstracts in English
Uehara, Kazuya; Nagashima, Takashi; Ikeda, Yoshitaka; Imai, Tsuyoshi; Kimura, Haruyuki; Maebara, Sunao; *; *; *; *; et al.
JAERI-M 91-182, 79 Pages, 1991/11
no abstracts in English
Uehara, Kazuya; Kimura, Haruyuki; JT-60 Team
Radio-Frequency Power in Plasmas, p.106 - 113, 1989/00
no abstracts in English
Uehara, Kazuya; Ikeda, Yoshitaka; Saigusa, Mikio; Sakamoto, Keishi; Fujii, Tsuneyuki; Ushigusa, Kenkichi; Maebara, Sunao; Tsuneoka, Masaki; Seki, Masami; Moriyama, Shinichi; et al.
JAERI-M 87-211, 20 Pages, 1988/01
no abstracts in English
Imai, Tsuyoshi; Ushigusa, Kenkichi; Sakamoto, Keishi; Ikeda, Yoshitaka; Fujii, Tsuneyuki; Saigusa, Mikio; Yoshino, Ryuji; Uehara, Kazuya; Nagashima, Takashi; Kimura, Haruyuki; et al.
Nuclear Fusion, 28(8), p.1341 - 1350, 1988/00
Times Cited Count：24 Percentile：64.83(Physics, Fluids & Plasmas)no abstracts in English
; ; ; ; ; Saigusa, Mikio; ; ; ; ; et al.
JAERI-M 87-061, 25 Pages, 1987/05
no abstracts in English
