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Report No.
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Operation of the electron accelerator and the $$gamma$$-ray irradiation facilities

Agematsu, Takashi; Haruyama, Yasuyuki; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Nagao, Yuto; Kaneko, Hirohisa; Yamaguchi, Toshiyuki*; Yagi, Norihiko*; Takagi, Masahide*; Kawashima, Ikuo*; Matsuzaki, Shinya*

The electron accelerator and the $$gamma$$-ray irradiation facility have been operated without serious trouble. The annual operation time in FY 2011 for the electron accelerator, the first, the second cobalt irradiation facility and food irradiation facility are 1,059 h, 18,722 h, 9,976 h and 7,427 h, respectively. Typically repairs were next ones. The beam control circuit trouble and the isolation trouble by mixing in of air into SF$$_{6}$$ gas at electron accelerator were repaired. The maintenance check of the second irradiation facility was done. The $$^{60}$$Co sources were purchased and loaded to the second irradiation facility. Forty five pencil sources of $$^{60}$$Co with length of 30 cm each, eight coin sources of $$^{60}$$Co and the $$gamma$$-ray radiographic apparatus with a $$^{60}$$Co source were disposed to Japan Radioisotope Association (JRIA).

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