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Kokubun, Yuji; Nakada, Akira; Seya, Natsumi; Koike, Yuko; Nemoto, Masashi; Tobita, Keiji; Yamada, Ryohei*; Uchiyama, Rei; Yamashita, Daichi; Nagai, Shinji; et al.
JAEA-Review 2023-046, 164 Pages, 2024/03
JAEA-Review-2023-046.pdf:4.2MB
The Nuclear Fuel Cycle Engineering Laboratories conducts environmental radiation monitoring around the reprocessing plant in accordance with the "Safety Regulations for Reprocessing Plant of JAEA, Part IV: Environmental Monitoring". This report summarizes the results of environmental radiation monitoring conducted during the period from April 2022 to March 2023 and the results of dose calculations for the surrounding public due to the release of radioactive materials into the atmosphere and ocean. In the results of the above environmental radiation monitoring, many items were affected by radioactive materials emitted from the accident at the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company, Incorporated (changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016), which occurred in March 2011. Also included as appendices are an overview of the environmental monitoring plan, an overview of measurement methods, measurement results and their changes over time, meteorological statistics results, radioactive waste release status, and an evaluation of the data which deviated of the normal range.
Nakada, Akira; Kanai, Katsuta; Seya, Natsumi; Nishimura, Shusaku; Futagawa, Kazuo; Nemoto, Masashi; Tobita, Keiji; Yamada, Ryohei*; Uchiyama, Rei; Yamashita, Daichi; et al.
JAEA-Review 2022-078, 164 Pages, 2023/03
JAEA-Review-2022-078.pdf:2.64MB
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2021 to March 2022. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.
Nakada, Akira; Nakano, Masanao; Kanai, Katsuta; Seya, Natsumi; Nishimura, Shusaku; Nemoto, Masashi; Tobita, Keiji; Futagawa, Kazuo; Yamada, Ryohei; Uchiyama, Rei; et al.
JAEA-Review 2021-062, 163 Pages, 2022/02
JAEA-Review-2021-062.pdf:2.87MB
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2020 to March 2021. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.
Sakakibara, Hiroshi; Aoki, Nobuhiro; Muto, Masahiro; Otabe, Jun; Takahashi, Kenji*; Fujita, Naoyuki*; Hiyama, Kazuhiko*; Suzuki, Hirokazu*; Kamogawa, Toshiyuki*; Yokosuka, Toru*; et al.
JAEA-Technology 2020-020, 73 Pages, 2021/03
JAEA-Technology-2020-020.pdf:8.26MB
The decommissioning is currently in progress at the prototype fast breeder reactor Monju. Fuel assemblies will be taken out of its core for the first step of the great task. Fuel assemblies stand on their own spike plugged into a socket on the core support plate and support with adjacent assemblies through their housing pads each other, resulting in steady core structure. For this reason, some substitutive assemblies are necessary for the purpose of discharging the fuel assemblies of the core. Monju side commissioned, therefore, Plutonium Fuel Development Center to manufacture the substitutive assemblies and the Center accepted it. This report gives descriptions of design, manufacture, and shipment in regard to the substitutive assemblies.
Nakano, Masanao; Fujii, Tomoko; Nemoto, Masashi; Tobita, Keiji; Seya, Natsumi; Nishimura, Shusaku; Hosomi, Kenji; Nagaoka, Mika; Yokoyama, Hiroya; Matsubara, Natsumi; et al.
JAEA-Review 2020-069, 163 Pages, 2021/02
JAEA-Review-2020-069.pdf:4.78MB
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed by the Nuclear Fuel Cycle Engineering Laboratories, based on "Safety Regulations for the Reprocessing Plant of Japan Atomic Energy Agency, Chapter IV - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitant due to the radioactivity discharged from the plant to the atmosphere and the sea during April 2019 to March 2020. In this report, some data include the influence of the accidental release from the Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Co., Inc. (the trade name was changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016) in March 2011. Appendices present comprehensive information, such as monitoring programs, monitoring methods, monitoring results and their trends, meteorological data and discharged radioactive wastes. In addition, the data which were influenced by the accidental release and exceeded the normal range of fluctuation in the monitoring, were evaluated.
*; *; *; *; *; *
JNC TJ9400 2003-002, 142 Pages, 2003/02
Process and layout design of external wet gelation stages in vibropacking process was examined for the feasibility study of commercialized FBR cycle system. In this study, solidification, washing, drying, calcination, reduction, sintering stages including interim storage of sintering particles for the oxide core fuel production line were selected. The main results obtained by this study are as follows: (1)Based on the process examination results conducted last year, process-flow, mass balance and number of production line/equipment included sintering and interim storage stage were clarified. (2)On the basis of equipment layout examination, criticality safety considerations were sort out taking into account of abnormal conditions, such as leakage of particles onto the floor and apparatus-container mutual interference during container transfer. (3)Preliminary design of the main equipment was done. Equipment layout design was done in consideration of material transfer flow and maintenance measures to be applied. A schematic layout drawing was presented and a maintenance procedure was arranged along with a time scheduling. (4)Analytical sample taking points and necessary analytical items were extracted taking into account of quality control and process management. (5)A feature of the operating rate at each process stage was sort by examining a failure rate reliability of each component. (6)Based on the results, utility consumed and number of operators required for the plant operation, an amount of wastes was evaluated. (7)Equipment cost was evaluated for the production capacity of 200 ton-HM/year and capacity-cost interrelation dependency was examined in the view of number of production line.
*; *; *; *
JNC TJ8400 99-049, 28 Pages, 1999/02
In study and development of high-level radioactive waste geological disposal, engineering study is being carried out on design, manufacturing, and installation of the engineering barrier to clarify the engineering method that can ensure performances necessary for the engineering barrier. For the overpack, which is one of composition elements of the engineering barrier, at present there are two conceptions; i.e. a carbon steel overpack (of simplex carbon steel construction) and a composite overpack (of two-layer construction having a carbon steel inside for strength and titanium, copper, or others outside for corrosion resistant). Studies are being carried out on them from the viewpoints of their respective functions and manufacturing. For the carbon steel overpack, development elements in manufacturing technology have already been extracted through manufacturing full-scale models. In this entrusted study, we carried out some tests to obtain informations about applicability of some manufacturing method, through manufacturing of full-scale copper canister model which established in the manufacturing method study of last year.
*; *; *; *
JNC TJ8400 99-048, 74 Pages, 1999/02
In study and development of high-level radioactive waste geological disposal, engineering study is being carried out on design, manufacturing, and installation of the engineering barrier to clarify the engineering method that can ensure performances necessary for the engineering barrier. For the overpack, which is one of composition elements of the engineering barrier, at present there are two conceptions; i.e. a carbon steel overpack (of simplex carbon steel construction) and a composite overpack (of two-layer construction having a carbon steel inside for strength and titanium, copper or others outside for corrosion resistant). Studies are being carried out on them from the viewpoints of their respective functions and manufacturing. With respect to the carbon steel overpack, development elements in manufacturing technology have already been extracted through manufacturing full-scale models. In this entrusted study, we carried out some tests to obtain informations about applicability of some manufacturing method, through manufacturing of full-scale copper canister model which established in the manufacturing method study of last year.
Ishii, Toshimitsu; Ooka, Norikazu; Saito, Junichi; Kobayashi, Shunichi; Takahashi, Kunihiro; Tsukada, Takashi; Iwai, Takashi; Kurosawa, Yoshiaki; Hoshiya, Taiji; Tsuji, Hirokazu
Proceedings of International Symposium on Case Histories on Integrity and Failures in Industry (CHIFI), p.227 - 236, 1999/00
no abstracts in English
*; Nakajima, Hajime; ; ; Kondo, Tatsuo
Corrosion Fatigue; Mechanics, Metallurgy, Electrochemistry and Engineering, p.256 - 286, 1983/00
no abstracts in English
; ; Shindo, Masami; ; ; ; ; ; *; *; et al.
JAERI-M 82-062, 23 Pages, 1982/06
no abstracts in English
Nakajima, Hajime; *; ; *; Kondo, Tatsuo
Zairyo, 31(346), p.710 - 716, 1982/00
no abstracts in English
Tanai, Kenji; Kikuchi, Hirohito*; Nakayama, Masashi; Ono, Hirokazu; Shirase, Mitsuyasu*; Takahashi, Akihiro*; Niunoya, Sumio*; Kuriyama, Masanori*
no journal, ,
no abstracts in English
Mitsuyama, Kazuaki*; Takeda, Masaki; Sugita, Yutaka; Ono, Hirokazu; Wakasugi, Keiichiro*; Takase, Hiroyasu*; Takahashi, Hirokazu*; Hashimoto, Tomoko*
no journal, ,
no abstracts in English
Takahashi, Hirokazu*; Takeda, Masaki; Sugita, Yutaka; Ono, Hirokazu; Wakasugi, Keiichiro*; Takase, Hiroyasu*; Mitsuyama, Kazuaki*; Hashimoto, Tomoko*
no journal, ,
no abstracts in English
Sakakibara, Hiroshi; Aoki, Nobuhiro; Muto, Masahiro; Otabe, Jun; Takahashi, Kenji*; Fujita, Naoyuki*; Hiyama, Kazuhiko*; Suzuki, Hirokazu*; Kamogawa, Toshiyuki*; Yokosuka, Toru*; et al.
no journal, ,
no abstracts in English
