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Ota, Kazunori; Kurumada, Osamu; Nio, Daisuke; Uno, Yuki; Murayama, Yoji
JAEA-Testing 2011-004, 47 Pages, 2011/08
JAEA-Testing-2011-004.pdf:1.92MB
The JRR-3 start-up channels, used for monitoring neutron flux during the start-up procedure, are exchanged periodically. The exchange procedure was reviewed and improved to the JRR-3 start-up channels exchanging manual. Following the manual, exchanging work would be carried out adequately.
Nio, Daisuke; Ikekame, Yoshinori; Kurumada, Osamu
UTNL-R-0471, p.12_2_1 - 12_2_8, 2009/03
no abstracts in English
Nio, Daisuke; Ota, Kazunori; Ishizaki, Katsuhiko
Nihon Hozen Gakkai Dai-5-Kai Gakujutsu Koenkai Yoshishu, p.393 - 395, 2008/07
The research reactor JRR-3 was constructed for the purpose of development of nuclear technology and a large scale modification was done. It is necessary to investigate a maintenance methods considering high aging, because more than 15 years has passed from a large modification. In such situation, we should continue condition monitoring method which does not spoil safety and reliability and apply other instruments. So far, monitoring of vibration and lubricating oil has been done, and we might think it appropriate. From now on, we continue investigating that condition monitoring could be applied for other instruments.
Takeda, Ryoma; Omori, Takazumi; Mitsui, Kento; Takeuchi, Tomoaki; Ushijima, Hiroki; Matsui, Yoshinori; Nio, Daisuke; Endo, Yasuichi; Okada, Yuji; Ide, Hiroshi
no journal, ,
no abstracts in English
Ha, Yoosung; Hata, Kuniki; Okada, Yuji; Ushijima, Hiroki; Mitsui, Kento; Fuyushima, Takumi; Ishijima, Yasuhiro; Nio, Daisuke; Watanabe, Masaya; Tagami, Susumu; et al.
no journal, ,
no abstracts in English
Mitsui, Kento; Ushijima, Hiroki; Ogasawara, Reira; Okada, Yuji; Suzuki, Makoto; Kimura, Kazuya; Ouchi, Satoshi; Nio, Daisuke; Ishijima, Yasuhiro; Endo, Yasuichi; et al.
no journal, ,
no abstracts in English
Nio, Daisuke; Ikekame, Yoshinori; Suwa, Masayuki; Isaka, Koji; Ouchi, Satoshi; Mineshima, Hiromi; Motohashi, Jun; Torii, Yoshiya; Kinase, Masami; Murayama, Yoji
no journal, ,
no abstracts in English
Nio, Daisuke; Yagi, Masahiro; Hirane, Nobuhiko; Horiguchi, Hironori; Terakado, Yoshibumi
no journal, ,
no abstracts in English
Hata, Kuniki; Okada, Yuji; Ha, Yoosung; Ushijima, Hiroki; Mitsui, Kento; Fuyushima, Takumi; Ishijima, Yasuhiro; Nio, Daisuke; Watanabe, Masaya; Katsuyama, Jinya
no journal, ,
no abstracts in English
Nio, Daisuke; Nakashima, Hiroshi; Sakasai, Kaoru; Takamiya, Koichi*; Tanaka, Susumu*; Kumada, Hiroaki*
no journal, ,
The stability of neutron flux intensity at an accelerator-based BNCT facility is relatively worse than that at a reactor-based one. Therefore, it is necessary to measure the neutron flux precisely in real-time to optimize the patient's exposure dose for the accelerator-based BNCT. However, the neutron flux is so intense (about 10
(n/cm
/s)) that the real-time measurement has not been realized yet. Hence we tried to measure the neutron flux with a small detector using a Eu:LiCaF scintillator on the tip of optical fibers. We have carried out some experiments to check the followability and the linearity of the detector to the reactor power at KUR.
Fuyushima, Takumi; Ushijima, Hiroki; Mitsui, Kento; Endo, Yasuichi; Matsui, Yoshinori; Okada, Yuji; Ha, Yoosung; Hata, Kuniki; Ishijima, Yasuhiro; Nio, Daisuke; et al.
no journal, ,
no abstracts in English