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Report No.

Annual report on the environmental radiation monitoring around the Tokai Reprocessing Plant FY2020

Nakada, Akira ; Nakano, Masanao ; Kanai, Katsuta; Seya, Natsumi ; Nishimura, Shusaku; Nemoto, Masashi; Tobita, Keiji; Futagawa, Kazuo; Yamada, Ryohei  ; Uchiyama, Rei; Nagaoka, Mika  ; Matsubara, Natsumi; Matsuo, Kazuki; Maehara, Yushi; Hirao, Moe; Nihei, Hidekazu*; Ito, Chihiro; Onuma, Toshimitsu*; Fujii, Jun*; Kaminaga, Masayuki*; Sugai, Masamitsu*; Watanabe, Hajime*; Tadokoro, Satoshi*; Sato, Yoshimi*; Maejima, Kyoko*; Sasaya, Shinji*; Terakado, Ryo*; Tayama, Tomohiro*; Enokido, Yuka*; Yubune, Kazuhiro*; Takahashi, Hirokazu*

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.



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