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Report No.

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 2012 for the electron accelerator, the first, the second cobalt irradiation facility and food irradiation facility are 910 h, 15,738 h, 10,537 h and 7,871 h, respectively. Typicaly repairs were next ones. The SF6 gas withdrawal system broke of the accelerator, and there was trouble of mixing in of air. The maintenance check of the first irradiation facility was done. The $$^{60}$$Co ources were purchased and loaded to the first irradiation facility. Fifteen pencil sources of $$^{60}$$Co with length of 30 cm each, twelve ball sources of $$^{60}$$Co and five $$^{137}$$Cs source were disposed of, and they were transferred to Japan Radioisotope Association (JRIA).



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