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Onoue, Ryuji; Kawamata, Takanori; Otsuka, Kaoru; Sekine, Katsunori; Koike, Sumio; Gorai, Shigeru; Nishiyama, Yutaka; Fukasaku, Akitomi
JAEA-Review 2012-010, 116 Pages, 2012/03
JMTR is a light water moderated and cooled tank-type reactor, and its thermal power is 50 MW. The JMTR is categorized as high flux testing reactors in the world. The JMTR has been utilized for irradiation experiments of nuclear fuels and materials, as well as for radioisotope productions since the first criticality in March 1968 until August 2006. JAEA is decided to refurbish the JMTR as an important fundamental infrastructure to promote the nuclear research and development. And The JMTR refurbishment work is carried out for 4 years from 2007. Before refurbishment work, from August 2006 to March 2007, all concerned renewal facilities were selected from evaluation on their damage and wear in terms of aging. Facilities which replacement parts are no longer manufactured or not likely to be manufactured continuously in near future, are selected as renewal ones. Replace priority was decided with special attention to safety concerns. A monitoring of aging condition by the regular maintenance activity is an important factor in selection of continuous using after the restart. In this report, renewal of the cooling system within refurbishment facilities in the JMTR is summarized.
Harada, Hideo; Sekine, Toshiaki*; Hatsukawa, Yuichi*; Shigeta, Noriko*; Kobayashi, Katsunori*; Otsuki, Tsutomu*; Kato, Toshio*
Journal of Nuclear Science and Technology, 31(3), p.173 - 179, 1994/03
no abstracts in English
Sekine, Toshiaki*; Hatsukawa, Yuichi*; Kobayashi, Katsunori*; Harada, Hideo; Watanabe, Hisashi; Kato, Toshio*
Proceedings of International Conference on Nuclear Data for Science and Technology, p.57 - 58, 1992/00
no abstracts in English
Harada, Hideo; Watanabe, Hisashi; Sekine, Toshiaki*; Hatsukawa, Yuichi*; Kobayashi, Katsunori*; Kato, Toshio*
Journal of Nuclear Science and Technology, 27(6), p.577 - 580, 1990/06
Times Cited Count:26 Percentile:95.89(Nuclear Science & Technology)The thermal neutron cross section of the Cs(n,)Cs reaction was measured in order to supply a basic data for the nuclear transmutation research of radioactive waste. Irradiated Cs samples were chemically purified and their -ray spectra were measured with a HPGe detector. From the intensity ratio between the Cs -rays and the Cs -ray, the capture cross section was deduced to be 0.2500.013 barn, which is 2.3 times larger than the one measured by Stupegia.
Watanabe, Hironori; Mitsutake, Toru*; Kakizaki, Sadayuki*; Sekine, Katsunori*; Takase, Kazuyuki
no journal, ,
no abstracts in English
Kawamata, Takanori; Otsuka, Kaoru; Sekine, Katsunori; Onoue, Ryuji; Koike, Sumio; Nishiyama, Yutaka
no journal, ,
no abstracts in English