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Kokubun, Yuji; Nakada, Akira; Seya, Natsumi; Nagaoka, Mika; Koike, Yuko; Kubota, Tomohiro; Hirao, Moe; Yoshii, Hideki*; Otani, Kazunori*; Hiyama, Yoshinori*; et al.
JAEA-Review 2023-052, 118 Pages, 2024/03
Based on the regulations (the safety regulation of Tokai Reprocessing Plant, the safety regulation of nuclear fuel material usage facilities, the radiation safety rule, the regulation about prevention from radiation hazards due to radioisotopes, which are related with the nuclear regulatory acts, the local agreement concerning with safety and environment conservation around nuclear facilities, the water pollution control law, and by law of Ibaraki Prefecture), the effluent control of liquid waste discharged from the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency has been performed. This report describes the effluent control results of the liquid waste in the fiscal year 2022. In this period, the concentrations and the quantities of the radioactivity in liquid waste discharged from the reprocessing plant, the plutonium fuel fabrication facilities, and the other nuclear fuel material usage facilities were much lower than the limits authorized by the above regulations.
Nakada, Akira; Kanai, Katsuta; Kokubun, Yuji; Nagaoka, Mika; Koike, Yuko; Yamada, Ryohei*; Kubota, Tomohiro; Hirao, Moe; Yoshii, Hideki*; Otani, Kazunori*; et al.
JAEA-Review 2022-079, 116 Pages, 2023/03
Based on the regulations (the safety regulation of Tokai Reprocessing Plant, the safety regulation of nuclear fuel material usage facilities, the radiation safety rule, the regulation about prevention from radiation hazards due to radioisotopes, which are related with the nuclear regulatory acts, the local agreement concerning with safety and environment conservation around nuclear facilities, the water pollution control law, and by law of Ibaraki Prefecture), the effluent control of liquid waste discharged from the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency has been performed. This report describes the effluent control results of the liquid waste in the fiscal year 2021. In this period, the concentrations and the quantities of the radioactivity in liquid waste discharged from the reprocessing plant, the plutonium fuel fabrication facilities, and the other nuclear fuel material usage facilities were much lower than the limits authorized by the above regulations.
Takahashi, Yoshihiro*; Oki, Takahiro*; Nagasawa, Takaharu*; Nakajima, Yasuhito*; Kawanabe, Ryu*; Onishi, Kazunori*; Hirao, Toshio; Onoda, Shinobu; Mishima, Kenta; Kawano, Katsuyasu*; et al.
Nuclear Instruments and Methods in Physics Research B, 260(1), p.309 - 313, 2007/07
Times Cited Count:4 Percentile:35.75(Instruments & Instrumentation)no abstracts in English
Makihara, Akiko*; Asai, Hiroaki*; Tsuchiya, Yoshihisa*; Amano, Yukio*; Midorikawa, Masahiko*; Shindo, Hiroyuki*; Kuboyama, Satoshi*; Onoda, Shinobu; Hirao, Toshio; Nakajima, Yasuhito*; et al.
Proceedings of 7th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-7), p.95 - 98, 2006/10
no abstracts in English
Hirao, Toshio; Laird, J. S.; Onoda, Shinobu; Shibata, Toshihiko*; Wakasa, Takeshi; Yamakawa, Takeshi; Abe, Hiroshi; Takahashi, Yoshihiro*; Onishi, Kazunori*; Ito, Hisayoshi
Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.105 - 109, 2004/10
no abstracts in English
Takahashi, Yoshihiro*; Shibata, Toshihiko*; Murase, Yuji*; Onishi, Kazunori*; Hirao, Toshio; Kamiya, Tomihiro
Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.111 - 114, 2004/10
no abstracts in English
Abe, Tetsuo*; Onishi, Kazunori*; Takahashi, Yoshihiro*; Hirao, Toshio
Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.157 - 160, 2004/10
no abstracts in English
Shiotani, Hiroki; Ohtaki, Akira; Ono, Kiyoshi; Hirao, Kazunori; Kato, Atsushi; Yasumatsu, Naoto*; Kubota, Sadae*
JNC TN9400 2004-052, 514 Pages, 2004/09
This report presents the outline of the development and the results of characteristic evaluation on the candidate Fast Reactor (FR) cycle system concepts, scenario study on FR cycle deployment and cost-benefit analysis on the candidate FR cycle system concepts in the interim evaluation (FY2001 through FY2003) of the second phase of the Japanese "Feasibility Study on Commercialization of Fast Breeder Reactor Cycle System (FS)".
Hirao, Kazunori
Genshiryoku Shisutemu Nyusu, 15(3), 0 Pages, 2004/00
Focusing on the cover layer materials (as the Radon Barrier Materials), which could have the effect to restrain the radon from scattering into the air and the effect of the radiation shielding, we produced the radon barrier materials with crude bentonite on an experimental basis, using the rotary type comprehensive unit for grinding and mixing, through which we carried out the evaluation of the characteristics thereof.
Ono, Kiyoshi; Kubota, Sadae*; Heta, Masanori*; Shiotani, Hiroki; Hirao, Kazunori
JNC TN9400 2003-061, 135 Pages, 2003/07
This report is intended to explain the outline of the scenario studies on FBR (Fast Breeder Reactor) cycle introduction. Recently, people value the reduction of environmental impact in addition to the recycle of energy resources and the energy security in these scenario studies. This report summarizes the analysis about the necessity of plutonium recycling in LWR (Light Water Reactor) from short-term view and about the necessity of FBR cycle introduction from a long-term view in Japan, by comparing "FBR scenario" with "LWR once-through scenario" and "Pu recycle in LWR scenario", from the viewpoints of cumulative uranium demand, spent fuel storage, radioactive waste arising, etc. It becomes clear that the plutonium recycling in LWR has a good effect on the reduction of spent fuel storage and the cumulative natural uranium demand before FBR cycle introduction, from short-term view (20 - 30 years). On the other hand, this analysis also shows that there is much effect of FBR deployment not only on saving amount of uranium use and energy security but also on reduction of high-level radioactive waste (spent fuels and vitrified waste) and minor actinide arising, from long-term view (100 - 200 years).
Ono, Kiyoshi; Shiotani, Hiroki; Hirao, Kazunori
Proceedings of International Conference on Advanced Nuclear Energy and Fuel Cycle Systems (GLOBAL 2003) (CD-ROM), 0 Pages, 2003/00
JNC started the feasibility study on commercialized Fast Reactor (FR) cycle system in 1999 and is estimating several promising FR cycle concepts. This report summarizes the analysis about the necessity of FR cycle deployment in Japan and in the world from a long-term viewpoint, by comparing "FR scenari" with "LWR once-through scenario" and "Pu recycling in LWR scenario". The necessity of FR cycle deployment in Japan and in the world was confirmed from viewpoints of effective utilization of uranium resource and reduction of environmental impact.
; Ohtaki, Akira; Kofuji, Hirohide; Ono, Kiyoshi; Hirao, Kazunori
Saikuru Kiko Giho, (12), p.105 - 115, 2001/09
None
; Shiotani, Hiroki; Hirao, Kazunori
International Congress on Advanced Power Plants (ICAPP), 0 Pages, 2001/00
None
Ono, Kiyoshi; Hirao, Kazunori; Ikegami, Tetsuo
Progress in Nuclear Energy, 37(1-4), p.125 - 130, 2000/00
Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)Ono, Kiyoshi; Hirao, Kazunori; Ikegami, Tetsuo
Abstracts P37-38, p.37 - 38, 1999/12
Successful introduction scenarios into the practical application of FBR cycle have been investigated taking into account not only a domestic view point but also a worldwide view point. Considerations are paid on the discrimination between the influence factors that lead to the nuclear power introduction and those that lead to the FBR cycle introduction. The economic competitiveness is one of the most important factors along with the limitation for the CO release. Five major scenarios have been induced on view points of economy, reduction of radioactive waste, utilization of small scale FBRs, and Iimitation of uranium resource.
Furukawa, Kiyoshi; Hirao, Kazunori; Taniyama, Hiroshi; Matsuno, Yoshiaki
PNC TG033 82-01(2), 7 Pages, 1982/02
The sturctural materials of the experimental fast reactor, "JOYO", must maintain sufficient mechanical strength during the entire reactor plant lifetime. In JOYO, the material surveillance for reactor structureal components, safety vessel, primary cooling system piping, secondary cooling system piping and tank have been planned to confirem the design integrity of these structures. The material surveillance speciments have been loaded in the reactor plant and they will be periodically taken out and examined during plant life to monitor any changes in mechanical properites. This report summarizes the material surveillance program of JOYO.
Onishi, Kazunori*; Takahashi, Yoshihiro*; Oki, Takahiro*; Hirao, Toshio; Onoda, Shinobu; Ito, Hisayoshi
no journal, ,
no abstracts in English
Ono, Kiyoshi; Mukaida, Kyoko; Shiotani, Hiroki; Hirao, Kazunori
no journal, ,
GIF Economic Modeling Working Group (EMWG) is developing the G4-ECONS code for economic study of the generation IV nuclear systems. In this paper, we would like to introduce the outline of the total system cost analysis for Japan Atomic Energy Agency (JAEA) sodium cooled fast reactor (JSFR) and its fuel cycle, as an application sample of the G4-ECONS bottom-up approach, and the results of the comparison of it with JAEA original cost estimation using our own calculation model (FCC-EX code). The result of comparison between the electricity generation cost calculated by G4-ECONS code and FCC-EX code demonstrated the validity of calculation function of the G4-ECONS code.