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-ray irradiation facilitiesKaneko, Hirohisa; Haruyama, Yasuyuki; Haneda, Noriyuki; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Kanazawa, Takao; Kojima, Takuji; Yamaguchi, Toshiyuki*; Yagi, Norihiko*; et al.
JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 192, 2008/11
The accelerator served mainly for graft-polymerization for new material development, radiation effect study on semiconductors and various experiments of visiting users. The annual operation time of the electron accelerator is 706.3h. The Co-60 -ray irradiation facilities consist of three buildings (8 rooms) and cover a wide dose-rate range from 0.04 Gy/h to 20 kGy/h with eight irradiation cells. The annual operation time for the first, second cobalt irradiation facilities and food irradiation facility is 23,433h, 9,010h and 10,631h.
-ray irradiation facilitiesKaneko, Hirohisa; Haruyama, Yasuyuki; Haneda, Noriyuki; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Kanazawa, Takao; Kojima, Takuji; Yamaguchi, Toshiyuki*; Yagi, Norihiko*; et al.
JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 193, 2008/11
An electron accelerator and three -ray irradiation facilities were operated for various research subjects as operation plan in FY 2007 without serious trouble. The number of research subjects for the electron accelerator and -ray irradiation facilities is 505 and 1174, respectively. The number of experiment subject at the electron accelerator increased in the research fields of environment and nuclear facilities, and decreased in the field of heat resist. Also, the number at -ray irradiation facilities increased in the field of resource & bio-technology, and decreased in the field of nuclear facilities.
Seito, Hajime; Ichikawa, Tatsuya*; Haneda, Noriyuki; Kaneko, Hirohisa; Sato, Yoshishige*; Watanabe, Hiroshi*; Kojima, Takuji
JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 200, 2008/03
no abstracts in English
Co -ray in radiation processingSeito, Hajime; Kojima, Takuji; Kaneko, Hirohisa; Haneda, Noriyuki
JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 199, 2008/03
no abstracts in English
-ray irradiation facilitiesKaneko, Hirohisa; Hanaya, Hiroaki; Haneda, Noriyuki; Yamagata, Ryohei; Seito, Hajime; Kanazawa, Takao; Kojima, Takuji; Koyama, Shigeru*; Yamaguchi, Toshiyuki*; Kawashima, Ikuo*; et al.
JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 209, 2008/03
The accelerator served mainly for graft-polymerization for new material development, radiation effect study on semiconductors, and various experiments of outside users. The annual operation time for the electron accelerator is 597.4h(517h for vertical beams, 80.4h for horizontal beams) The Co-60 -ray irradiation facilities consist of three buildings (8 rooms) and cover a wide dose-rate range from 0.04Gy/h to 20kGy/h with eight irradiation cells. The annual operation time for the cobalt first, second irradiation facilities and food irradiation facility is 20,844 h, 6,335 h and 3,150 h.
-ray irradiation facilitiesKojima, Takuji; Kaneko, Hirohisa; Haneda, Noriyuki; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Kanazawa, Takao; Koyama, Shigeru*; Yamaguchi, Toshiyuki*; Kawashima, Ikuo*; et al.
JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 208, 2008/03
An electron accelerator and three ray irradiation facilities were operated for various research subjects as operation plan in FY 2006 without serious trouble. The number of research subjects for the No.1 accelerator, the Cobalt No.1 facility, the Cobalt No.2 facility, and the Food irradiation facility, is 544, 159, 622, and 357, respectively.
Kaneko, Hirohisa; Hanaya, Hiroaki; Haneda, Noriyuki; Yamagata, Ryohei; Seito, Hajime; Kanazawa, Takao; Yamaguchi, Toshiyuki*; Kawashima, Ikuo*; Yagi, Norihiko*
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 201, 2007/02
The No.1 accelerator has been smoothly on service since established in January 1986. The No.1 accelerator renewed both the high frequency inverter power supply in January 2000 and the accelerator control system in June 2001. The No.2 accelerator operation was terminated and the extended operation of the No.1 accelerator was started having one additional consignment operator at April 2005.
-ray irradiation facilitiesKanazawa, Takao; Kaneko, Hirohisa; Haneda, Noriyuki; Hanaya, Hiroaki; Yamagata, Ryohei; Seito, Hajime; Koyama, Shigeru*; Yamaguchi, Toshiyuki*; Kawashima, Ikuo*; Yagi, Norihiko*; et al.
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 200, 2007/02
An electron accelerator and three ray irradiation facilities were operated without any trouble for various experiments in FY 2005. The operation of No.2 accelerator was terminated at April 2005. The number of experimental subjects was 544 for the No.1 accelerator, 287 for the Cobalt No.1 facility, 630 for the Cobalt No.2 facility, and 339 for the Food irradiation facility.
-ray irradiation facilitiesHaneda, Noriyuki; Yamagata, Ryohei; Kaneko, Hirohisa; Hanaya, Hiroaki; Seito, Hajime; Kanazawa, Takao; Koyama, Shigeru*; Kawashima, Ikuo*; Yagi, Norihiko*; Takagi, Masahide*; et al.
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 202, 2007/02
The Co-60 -ray irradiation facilities consist of three buildings and cover a wide dose-rate range from 0.04Gy/h to 20kGy/h with eight irradiation cells. All the facilities have been operated without serious trouble and served for the following various R&D's of JAEA and out side users such as development of new materials, radiation resistance test, radiation biotechnology.
Co -ray high dose rate at radiation processing levelKojima, Takuji; Tachibana, Hiroyuki; Haneda, Noriyuki; Kaneko, Hirohisa; Haruyama, Yasuyuki; Tanaka, Ryuichi*
Radioisotopes, 50(7), p.291 - 300, 2001/07
Plaque type 
Co -ray sources having wide radiation field with high absorbed dose rates ranging of about 100
10,000Gy/h is widely used in radiation processing e.g. radiation sterilization of health care products. Calibration of such radiation processing doses or dose rates is not easy to be performed at the present standard dosimetry laboratories, since characteristics of most of their radiation field can provide collimated gamma-rays from a point source and/or lower dose rates, which are quite different from those of panoramic (uncollimated) radiation fields used in radiation processing. The high-dose calibration technique using a parallel-plate ionization chamber system has developed in the JAERI dose calibration facility. The facility equips two Co -ray plaque sources covering wide dose-rate range of 520,000 Gy/h which have overlapping dose-rate region with that at the National Institute of Advanced Industrial Science and Technology(AIST), the national standard Dosimetry laboratory in Japan. Consistency of dose calibration results at JAERI and those at AIST was verified without additional correction regarding to difference in characteristics of radiation fields involving current/exposure -rate conversion coefficients given in the dose rate level of 10100 Gy/h at the AIST and high-dose rates of 520,000 Gy/h at JAERI. It demonstrates our dose traceability to the AIST from the technical point of view. The dose calibration at JAERI covers the high-dose range of 0.5 to 
Gy with uncertainty of 
2.2% at 95% confidence level.
Kojima, Takuji; Taguchi, Mitsumasa; Haruyama, Yasuyuki; Haneda, Noriyuki; Sunaga, Hiromi*; Miyahara, Makoto*
no journal, ,
no abstracts in English
Hanaya, Hiroaki; Kaneko, Hirohisa; Haneda, Noriyuki; Yamagata, Ryohei; Seito, Hajime; Kojima, Takuji; Yamaguchi, Toshiyuki*; Kawashima, Ikuo*; Yagi, Norihiko*; Takagi, Masahide*
no journal, ,
no abstracts in English
Seito, Hajime; Kojima, Takuji; Kaneko, Hirohisa; Haneda, Noriyuki; Ichikawa, Tatsuya*; Sato, Yoshishige*; Watanabe, Hiroshi*
no journal, ,
no abstracts in English
Ichikawa, Tatsuya*; Takehisa, Masaaki*; Sato, Yoshishige*; Sasuga, Tsuneo*; Watanabe, Hiroshi*; Haneda, Noriyuki; Seito, Hajime; Kojima, Takuji; Haruyama, Yasuyuki
no journal, ,
no abstracts in English
Seito, Hajime; Kojima, Takuji; Kaneko, Hirohisa; Haneda, Noriyuki; Haruyama, Yasuyuki; Kanazawa, Takao
no journal, ,
no abstracts in English
