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Uchida, Masahiro; Maeda, Tsuyoshi; Takimoto, Misaki; Takada, Chie; Tsujimura, Norio
no journal, ,
no abstracts in English
Tamura, Ken; Takahashi, Akina
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no abstracts in English
Honda, Fumiya; Isozaki, Kohei; Nabatame, Satoru
no journal, ,
no abstracts in English
Sasaki, Kazuki; Okuyama, Shun; Sagawa, Naoki; Hosomi, Kenji; Takada, Chie
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no abstracts in English
Tsubota, Yoichi; Yoshida, Masato; Honda, Fumiya; Tokonami, Shinji*; Nakagawa, Takahiro; Kawasaki, Takashi
no journal, ,
In order to measure the airborne concentration in air in real time, a dust monitor to measure directly the alpha-particle concentration in a flat-type flow path was developed and its performance was evaluated. The performance of the prototype dust monitor was evaluated in a high-humidity environment, and its counting rate was more than ten times higher than that of a conventional dust monitor.
Saegusa, Yu; Kodaka, Noriyasu; Yamamoto, Masahiko; Horigome, Kazushi; Inada, Satoshi; Kuno, Takehiko
no journal, ,
Determination of iodine-129, in sample of reprocessing process has high priority to evaluate the environmental impact at treatment and disposal of radioactive solid wastes. In this study, we have been developed analytical method for iodine-129 by ICP-MS with collision reaction cell technique. Oxygen gas has been introduced into the collision reaction cell and isobaric ion, xenon-129, has been eliminated. In this presentation, optimized oxygen gas flow rate, analytical performance, and the measurement results of iodine-129 in the iodine adsorption filter collected from the liquid waste treatment facility in Tokai Reprocessing Plant are reported.
Yoshida, Masato; Kawasaki, Kohei; Aita, Takahiro; Tsubota, Yoichi; Kikuchi, Ryo*; Honda, Fumiya
no journal, ,
no abstracts in English
Taniguchi, Takumi; Osugi, Takeshi; Sone, Tomoyuki; Kobayashi, Kentaro
no journal, ,
no abstracts in English
Sato, Daisuke; Miyazaki, Yasunori; Watanabe, So; Nakamura, Masahiro; Kai, Tetsuya; Shibata, Atsuhiro; Nomura, Kazunori
no journal, ,
no abstracts in English
Okita, Shoichiro
no journal, ,
Neutronic calculations are performed for VHTRC core with JENDL-4.0 and the thermal neutron scattering law for graphite in ENDF/B-VIII, and the effective multiplication factor is compared with the experimental data. The calculation accuracy is improved by using the thermal neutron scattering law for graphite in ENDF/B-VIII compared with the previous results based on JENDL-4.0.
Hirooka, Shun; Okumura, Kazuyuki; Makino, Takayoshi
no journal, ,
no abstracts in English
Kawasaki, Kohei
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no abstracts in English
TaEndo, Shunsuke; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Osamu; Iwamoto, Nobuyuki; Rovira Leveroni, G.
no journal, ,
no abstracts in English
Asakawa, Jun; Ono, Yosuke; Shibanuma, Tomohiro; Aita, Takahiro; Nagai, Yuya
no journal, ,
no abstracts in English
Sawada, Sho
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no abstracts in English
Terasaka, Yuta; Watanabe, Kenichi*; Uritani, Akira*
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no abstracts in English
Watanabe, Nao; Sugawara, Takanori; Okubo, Nariaki; Nishihara, Kenji
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no abstracts in English
Morishita, Yuki; Hoshi, Katsuya; Torii, Tatsuo*
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no abstracts in English
Sasaki, Koei
no journal, ,
We are developing a fuel coating material with a Cs capture function in anticipation of reducing the exposure dose of HTGR plants, improving safety in the event of a primary reactor accident, making the plant more compact and reducing construction costs due to the reduction of shielding wall thickness. Bi and Sb were selected as Cs getter materials. Their simulated Cs trap compounds were formed in the carbon structure and high temperature stability at 1500
C was evaluated. Although Bi was precipitated in carbon, the formation of Cs compounds could not be seen. Sb formed a Cs compound (Cs
Sb, etc.) in carbon structure and showed stability at 1500C. Therefore, it was found that Sb has a Cs trap function.