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Suganuma, Kazuaki; Hiroki, Fumio; Ito, Takashi; Yamazaki, Yoshio
Proceedings of 16th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.846 - 848, 2019/07
In the past, water flow decreased at water cooling system in J-PARC Linac. Contamination get mixed in cooling water. The problem was resolved by changing the system of the circulation pumps and reducing the tiny metal in water cooling system. However, suppression of occurring tiny metal is unresolved. The tiny metal is the unique problem of accelerator. It is caused by heavy using oxygen free copper and phosphorus deoxidized copper. The two copper is used for the part of accelerator and purified water. The object of the report is investigation of tiny metal contamination of water cooling system in J-PARC Linac.
Suganuma, Kazuaki; Hiroki, Fumio; Ito, Takashi; Yamazaki, Yoshio
Proceedings of 15th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.309 - 311, 2018/08
It is the report to improve the problem of flow reduction in water cooling system resolved completely in summer, 2017. It is continued the phenomenon decreasing the flow (5,800 L/min) of circulating water cooling in DTL and SDTL about 3% per week. By the flow reduction, the entire operation of J-PARC and operation of the accelerator are stopped and low flow contact of flowmeter installed in cavities. The phenomenon is progressed about 9 years since we confirm it and drastic measures for it are aspired. In this report, the point of interest to solve this problem is written. Similarly, it is suggested that the point we should be careful when we use the water cooling system it is one of the utility of J-PARC accelerator. In last summer, the flow reduction is not occur completely as specification changes and replacement of the pumps. Thanks of that, the entire operation and operation of accelerator of J-PARC is operated safety.
Suganuma, Kazuaki; Hiroki, Fumio; Ito, Takashi; Yamazaki, Yoshio
Proceedings of 14th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.871 - 873, 2017/12
J-PARC LINAC has a problem that the amount of the flowing water is reduced. It spends such time from alarm to the restoration that it is desirable to take measures. So we have to solve this problem. We tried to focus again on the related water level fluctuation in the storage tank of cooling water equipment and the flow rate fluctuation all of the cooling water that has observed in cooling water equipment named RI4 from RFQ to SDTL of the LINAC. At the same time, we check new information of the operating data. We have hypothesized about the cause of fluctuation of the whole flow rate. That can be deterioration of water quality and lacking of performance of circulation pumps. That can be deterioration of water quality and lacking of performance of circulation pumps.
Suganuma, Kazuaki; Hiroki, Fumio; Ito, Takashi; Yamazaki, Yoshio
Proceedings of 13th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.304 - 306, 2016/11
J-PARC LINAC has a problem that the amount of the flowing water is reduced. It spends such time from alarm to the restoration that it is desirable to take measures. So we have to solve this problem. We tried to focus again on the related water level fluctuation in the storage tank of cooling water equipment and the flow rate fluctuation all of the cooling water that has observed in cooling water equipment named RI4 from RFQ to SDTL of the LINAC. At the same time, we check new information of the operating data. We have hypothesized about the cause of fluctuation of the whole flow rate. That can be deterioration of water quality and lacking of performance of circulation pumps. That can be deterioration of water quality and lacking of performance of circulation pumps.
Kanazawa, Kenichiro; Ogiwara, Norio; Suganuma, Kazuaki; Inohara, Takashi*; Wada, Kaoru*
Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.391 - 393, 2008/00
no abstracts in English
Yamada, Seiya; Washiya, Tadahiro; Takeuchi, Masayuki; Suganuma, Takashi; Aose, Shinichi
Proceedings of 12th International Conference on Nuclear Engineering (ICONE-12) (CD-ROM), 8 Pages, 2004/00
As a part of the feasibility study on commercialized fast reactor cycle systems, Japan Nuclear Cycle Development Institute (JNC) has been developing the fuel decladding technology for the dry reprocessing process (oxide electrowinning process) and aqueous reprocessing process. Particularly, in the oxide electrowinning process, the spent fuel should be reduced to powder for quick dissolution in the molten salt at electrolyzer. Heat treatment method such as a voloxidation might not be applicable in the decladding process, because of the high plutonium content as fast reactor fuel. Therefore, JNC proposes new decladding system with innovative mechanical decradding devices. The decladding system consists of fuel crushing stage, hull separation stage and hull rinsing stage. In this paper, the outline of this new decladding system and its innovative devices will be descried.
Takeuchi, Masayuki; Kato, Toshihiro*; Washiya, Tadahiro; Takashi, Suganuma,; Aose, Shinichi
Saikuru Kiko Giho, (23), p.31 - 40, 2004/00
The corrosion resistance of ceramic materials was discussed through thermodynamic calculation and corrosion test. The corrosion test was basically carried out in alkari molten salt under chlorine gas. In addition, the effects of oxygen, carbon and simulated fission products on ceramics corrosion were evaluated in molten salt under chlorine gas. As results, silicon nitrides, mullite and cordierite had a good corrosion resistance in above conditions.
Washiya, Tadahiro; Koizumi, Kenji; Koichi, Sugai,*; Takashi, Suganuma,; Aose, Shinichi
Saikuru Kiko Giho, (25), p.33 - 44, 2004/00
As a part of the feasibility study (FS) on commercialized fast reactor cycle systems, JNC has been developing the fuel decladding technology for the dry reprocessing process (oxide electrowinning process). In this process, the spent fuel should be reduced to powder for quick dissolution in the molten salt at electrolyzer. Therefore, JNC proposes new decladding system with innovative mechanical decradding devices. The decladding system consists of fuel crushing stage, hull separation stage and hull rinsing stage. In the fuel crushing stage, disassembled spent fuel pins are crushed and powdered by mechanical decladding device, then the following stage, the hull and the fuel powder are separated by magnetic separator. Only the fuel powder is fed to the electrolyzer. On the other side, the separated hull is melted by induction heating method, and the small amount of oxide included in the hull fragments is recovered at the hull rinsing stage. The recovered oxide fuel is fed back to the electrolyzer.
Ikeda, Yoshitaka; Naito, Osamu; Seki, Masami; Kondoh, Takashi; Ide, Shunsuke; ; *; ; *; ; et al.
Fusion Engineering and Design, 24, p.287 - 298, 1994/00
Times Cited Count：22 Percentile：85.01(Nuclear Science & Technology)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：17.26(Nuclear Science & Technology)no abstracts in English
Seki, Masami; Ikeda, Yoshitaka; Imai, Tsuyoshi; Ushigusa, Kenkichi; Naito, Osamu; Ide, Shunsuke; Kondoh, Takashi; Nemoto, Masahiro; Takeuchi, Hiroshi; Suganuma, Kazuaki; et al.
Proc. of the 19th European Conf. on Controlled Fusion and Plasma Physics, p.985 - 988, 1992/00
no abstracts in English
Seki, Masami; Ikeda, Yoshitaka; *; Imai, Tsuyoshi; ; Yokokura, Kenji; Sawahata, Masayuki; Suganuma, Kazuaki; Sato, Minoru; *; et al.
Fusion Technology 1990, p.1060 - 1064, 1991/00
no abstracts in English
Ikeda, Yoshitaka; Imai, Tsuyoshi; Fujii, Tsuneyuki; Honda, Masao; ; Maebara, Sunao; Nagashima, Takashi; Saigusa, Mikio; Sakamoto, Keishi; Sawahata, Masayuki; et al.
Fusion Engineering and Design, 13, p.209 - 217, 1990/00
Times Cited Count：1 Percentile：19.6(Nuclear Science & Technology)no abstracts in English
Ikeda, Yoshitaka; Imai, Tsuyoshi; Ushigusa, Kenkichi; Seki, Masami; *; Naito, Osamu; Honda, Masao; ; Maebara, Sunao; Nagashima, Takashi; et al.
Nuclear Fusion, 29(10), p.1815 - 1819, 1989/10
Times Cited Count：24 Percentile：70.1(Physics, Fluids & Plasmas)no abstracts in English
Yokokura, Kenji; Ikeda, Yoshitaka; Suganuma, Kazuaki; Nagashima, Takashi; *
Shinku, 31(12), p.945 - 953, 1988/12
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
Yokokura, Kenji; Ikeda, Yoshitaka; Imai, Tsuyoshi; Suganuma, Kazuaki; Nagashima, Takashi
Shinku, 31(5), p.359 - 364, 1988/00
no abstracts in English
Imai, Tsuyoshi; Nagashima, Takashi; Kimura, Haruyuki; Uehara, Kazuya; ; Fujii, Tsuneyuki; Honda, Masao; Ikeda, Yoshitaka; *; ; et al.
AIP Conference Proceedings 159, p.115 - 118, 1987/00
no abstracts in English
Hoshino, Takanori; Ikeuchi, Hirotomo; Sano, Yuichi; Watanabe, Masayuki; Suganuma, Takashi
no journal, ,
no abstracts in English
Wakui, Ryohei; Higuchi, Hidetoshi; Kitagaki, Toru; Washiya, Tadahiro; Takeuchi, Masayuki; Kobayashi, Tsuguyuki*; Watanabe, Masayuki; Suganuma, Takashi
no journal, ,
no abstracts in English
