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Okumura, Masahiko; Kerisit, S.*; Bourg, I. C.*; Lammers, L. N.*; Ikeda, Takashi*; Sassi, M.*; Rosso, K. M.*; Machida, Masahiko
Journal of Environmental Radioactivity, 189, p.135 - 145, 2018/09
Times Cited Count：51 Percentile：87.2(Environmental Sciences)no abstracts in English
Yaita, Tsuyoshi; Honda, Mitsunori; Shimoyama, Iwao; Ito, Kenichi*; Mampuku, Yuzo*; Tsuji, Takuya; Matsumura, Daiju
Nihon Genshiryoku Gakkai-Shi ATOMO
, 59(8), p.483 - 487, 2017/08
no abstracts in English
Yaita, Tsuyoshi; Kobayashi, Toru; Ikeda, Takashi; Matsumura, Daiju; Machida, Masahiko; Okumura, Masahiko; Nakamura, Hiroki
Hoshako, 27(6), p.315 - 322, 2014/11
no abstracts in English
Yaita, Tsuyoshi
Petorotekku, 37(5), p.329 - 333, 2014/05
no abstracts in English
Naganawa, Hirochika
no journal, ,
no abstracts in English
Kamikawa, Masaaki*; Izumi, Keisuke*; Takemoto, Jumpei*; Kawasaki, Masaji*; Oka, Kiyoshi; Yamagata, Ryohei
no journal, ,
no abstracts in English
Ishiyama, Shintaro
no journal, ,
Chemical interface controlled dispersion and high speed shearing washing test was implemented for the purpose of performance of refinement and volume reduction, and measured micro-grained particles by laser method after washing. From these results, it is concluded that about 85% volume reduction was achieved by this technique.
Yaita, Tsuyoshi; Shiwaku, Hideaki; Kobayashi, Toru; Awual, M. R.; Suzuki, Shinichi; Motokawa, Ryuhei; Matsumura, Daiju; Tsuji, Takuya; Nishihata, Yasuo; Yoshigoe, Akitaka; et al.
no journal, ,
no abstracts in English
Yaita, Tsuyoshi
no journal, ,
Yaita, Tsuyoshi
no journal, ,
no abstracts in English
Shimoyama, Iwao; Honda, Mitsunori; Kogure, Toshihiro*; Baba, Yuji; Hirao, Norie; Okamoto, Yoshihiro; Yaita, Tsuyoshi; Suzuki, Shinichi
no journal, ,
We have proposed a low-pressure sublimation method for Cs removal from radioactive-contaminated soil in Fukushima. In this work, we investigated compositional and structural changes of Cs-sorbed weathered biotite (WB) before and after low-pressure sublimation with addition of NaCl-CaCl
salts, to study Cs desorption mechanism from clay minerals. X-ray fluorescence spectroscopy clarified that 100% of Cs was removed with the salts at 700 
C. Moreover, we found that 99% of K in WB was removed as well with the salts. On the other hand, Ca increased with heating temperature. X-ray diffraction analysis clarified that the reflections from WB disappeared and a number of new reflections appeared after the treatment with the salts. These results indicate WB changed to some silicates, and we clarified that the dominant silicate was augite using transmission electron microscopy. Based on these results, we propose a new idea, Cs-free mineralization, for Cs removal from clay minerals utilizing the mechanism in which monovalent large cations are discharged with accompanying phase transition from clay minerals to other minerals.
Takeuchi, Masayuki; Sano, Yuichi; Watanabe, So
no journal, ,
In order to achieve the reduction of vitrification waste volume, it is important not to move minor actinides (MA) to vitirification waste by its partitioning and transmutation. In this presentation, the summary of MA partitioning program from high level radioactive liquid waste using extraction chromatography will be introduced.
Sato, Daisuke; Watanabe, So; Yano, Kimihiko; Kitawaki, Shinichi; Arai, Tsuyoshi*; Shibata, Atsuhiro; Takeuchi, Masayuki
no journal, ,
no abstracts in English
