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Sono, Hiroki; Izawa, Kazuhiko; Yoritsune, Tsutomu; Suyama, Kenya; Tonoike, Kotaro
Proceedings of 12th International Conference on Nuclear Criticality Safety (ICNC2023) (Internet), 7 Pages, 2023/10
Japan Atomic Energy Agency (JAEA) has constructed and operated nine critical assemblies. Of these nine facilities as of 2023, four have already been dismantled, four are under decommissioning, and only STACY is active but under temporally shutdown. STACY is scheduled to restart in 2024 after core modification from a "critical assembly using uranium nitrate solution fuel" to a "general-purpose critical assembly using uranium fuel rods and light-water moderator." The immediate objective of new STACY is to acquire criticality data for fuel debris removal from the damaged reactors in Fukushima-Daiichi Nuclear Power Plant. After the critical experiment program regarding fuel debris, the new STACY is expected to be used for various R&D on next-generation power reactors and others. In addition, the new STACY will serve as an educational and training reactor. These activities are useful not only for Japan but also for international collaborative research and joint use.
Yoritsune, Tsutomu; Ishida, Toshihisa
JAERI-Tech 2003-022, 118 Pages, 2003/03
JAERI-Tech-2003-022.pdf:18.03MB
no abstracts in English
Araya, Fumimasa; Nakatsuka, Toru; Yoritsune, Tsutomu; Kureta, Masatoshi; Yoshida, Hiroyuki; Ishikawa, Nobuyuki; Sato, Takashi; Watanabe, Hironori; Okubo, Tsutomu; Iwamura, Takamichi; et al.
JAERI-Research 2002-018, 37 Pages, 2002/10
JAERI-Research-2002-018.pdf:2.62MB
no abstracts in English
Yoritsune, Tsutomu; Ishida, Toshihisa; Imayoshi, Sho*
Journal of Nuclear Science and Technology, 39(8), p.913 - 922, 2002/08
Times Cited Count：4 Percentile：28.66(Nuclear Science & Technology)no abstracts in English
Ishida, Toshihisa; Yoritsune, Tsutomu
Nuclear Engineering and Design, 215(1-2), p.51 - 67, 2002/06
Times Cited Count：115 Percentile：98.36(Nuclear Science & Technology)no abstracts in English
Yoritsune, Tsutomu; Ishida, Toshihisa
JAERI-Research 2001-053, 45 Pages, 2001/12
JAERI-Research-2001-053.pdf:1.77MB
no abstracts in English
Ura, Tamaki*; Takamasa, Tomoji*; Nishimura, Hajime*; Aoki, Taro*; Ueno, Michio*; Maeda, Toshio*; Nakamura, Masato*; Shimazu, Shunsuke*; Tokunaga, Sango*; Shibata, Yozo*; et al.
JAERI-Tech 2001-049, 154 Pages, 2001/07
JAERI-Tech-2001-049.pdf:11.24MB
JAERI has studied on design and operation of a nuclear powered submersible research vessel, which will navigate under sea in the Arctic Ocean, as a part of the design study of advanced marine reactors. This report describes operation conditions and an operating system of the vessel those were discussed by the specialists of hull design, sound positioning, ship motions and oceanography, etc. The design conditions on ship motions for submersible vessels were surveyed considering regulations in our country, and ship motions were evaluated assuming the observation activities in the Arctic Ocean. A submarine transponder system and an on ice communication buoy system were examined as a positioning and communication system supposing the activity under ice. Procedures to secure safety of nuclear powered submersible research vessel were discussed based on the investigation of accidents. These results were reflected to the concept of the nuclear powered submersible research vessel, and subjects fto be settled in the next step were clarified.
Kusunoki, Tsuyoshi; Takahashi, Teruo*; Nishimura, Hajime*; Tokunaga, Sango*; Odano, Naoteru; Yoritsune, Tsutomu; Ishida, Toshihisa
JAERI-Tech 2001-045, 68 Pages, 2001/07
JAERI-Tech-2001-045.pdf:5.33MB
A concept of a submersible research vessel navigating in 600 m depth and a compact nuclear reactor were carried out for the expansion of the nuclear power utilization. The mission of the vessel is the research of mechanism of the climate change. Through conditions of the Arctic Ocean and the sea at high latitude have significant impacts on the global environmental change, it is difficult to investigate those areas by ordinary ships because of thick ice or storm. By taking account of the research mission, the basic specifications of the vessel are decided; the total weight is 500 t, the submersible depth is 600 m, the maximum speed is 12 knots (22.2km/h), and the number of crews is 16. Nuclear power has an advantage in supplying large power of electricity in the sea for long period. Based on the requirements, it has been decided that two sets of compact nuclear reactor, SCR, which is light-weighted and of enhanced safety characteristics to supply the total electricity of 500 kW.
Ishida, Toshihisa; Imayoshi, Sho*; Yoritsune, Tsutomu; Nunokaya, Hiroshi*; Ochiai, Masaaki; Ishizaka, Yuichi*
Journal of Nuclear Science and Technology, 38(7), p.557 - 570, 2001/07
Times Cited Count：21 Percentile：79.60(Nuclear Science & Technology)no abstracts in English
Nunokawa, Hiroshi*; Yoritsune, Tsutomu; Imayoshi, Sho*; Kasahara, Yoshiyuki*; Ochiai, Masaaki; Ishida, Toshihisa
JAERI-Tech 2001-040, 115 Pages, 2001/06
JAERI-Tech-2001-040.pdf:10.18MB
no abstracts in English
Kusunoki, Tsuyoshi; Odano, Naoteru; Yoritsune, Tsutomu; Ishida, Toshihisa; Hoshi, Tsutao*; Sako, Kiyoshi*
Nuclear Engineering and Design, 201(2-3), p.155 - 175, 2000/10
Times Cited Count：51 Percentile：93.22(Nuclear Science & Technology)no abstracts in English
Ishida, Toshihisa; Kusunoki, Tsuyoshi; Odano, Naoteru; Yoritsune, Tsutomu; Fukuhara, Yoshifumi*; Ochiai, Masaaki; Hoshi, Tsutao*
Proceedings of International Workshop on Utilization of Nuclear Power in Oceans (N'ocean 2000), p.55 - 66, 2000/02
no abstracts in English
Odano, Naoteru; Kusunoki, Tsuyoshi; Yoritsune, Tsutomu; Fukuhara, Yoshifumi*; Saito, Kazuo*; Takahashi, Teruo*; Ishida, Toshihisa
Proceedings of International Workshop on Utilization of Nuclear Power in Oceans (N'ocean 2000), p.164 - 169, 2000/02
no abstracts in English
Kusunoki, Tsuyoshi; Odano, Naoteru; Yoritsune, Tsutomu; Fukuhara, Yoshifumi*; Nakajima, Nobuya; Ochiai, Masaaki
Proceedings of the 4th JSME-KSME Thermal Engineering Conference, p.1_61 - 1_66, 2000/00
no abstracts in English
Yoritsune, Tsutomu; Kusunoki, Tsuyoshi; Odano, Naoteru; Ishida, Toshihisa
Proceedings of the 4th JSME-KSME Thermal Engineering Conference, p.1_31 - 1_36, 2000/00
no abstracts in English
Takahashi, Hiroki; ; Yamamoto, Kazuyoshi; Yoritsune, Tsutomu
JAERI-Conf 99-006, p.125 - 130, 1999/08
no abstracts in English
Takahashi, Hiroki; Yamamoto, Kazuyoshi; Yoritsune, Tsutomu; ;
JAERI-Tech 99-037, 44 Pages, 1999/03
no abstracts in English
Kusunoki, Tsuyoshi; Yoritsune, Tsutomu; Ishida, Toshihisa
Nihon Genshiryoku Gakkai-Shi, 40(2), p.135 - 143, 1998/00
Times Cited Count：1 Percentile：14.80(Nuclear Science & Technology)no abstracts in English
; Yoritsune, Tsutomu;
JAERI-Tech 97-052, 84 Pages, 1997/10
no abstracts in English
Kasahara, Y.*; Nakazawa, Toshio; Kusunoki, Tsuyoshi; Takahashi, Hiroki; Yoritsune, Tsutomu
JAERI-Tech 97-048, 62 Pages, 1997/10
no abstracts in English
