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Fukushi, Keisuke*; Hasegawa, Yusuke*; Maeda, Koshi*; Aoi, Yusuke*; Tamura, Akihiro*; Arai, Shoji*; Yamamoto, Yuhei*; Aosai, Daisuke*; Mizuno, Takashi
Environmental Science & Technology, 47(22), p.12811 - 12818, 2013/11
Times Cited Count：27 Percentile：58.19(Engineering, Environmental)Eu(III) sorption on granite was examined by the combined microscopic and macroscopic approaches. Polished thin sections of the granite were reacted with solutions containing 10 
M of Eu(III) and analyzed using EPMA and LA-ICP-MS. The Eu enrichment up to 6 wt.% was observed on most of the biotite grains. The Eu-enriched parts commonly lose K, which is the interlayer cation of biotite, indicating that the sorption mode is cation exchange in the interlayer. Batch Eu(III) sorption experiments on granite and biotite powders were conducted. The macroscopic sorption behavior of biotite was consistent with that of granite. The obtained sorption edges can be reproduced reasonably by the modeling considering single-site cation exchange reactions. Granite is complex mineral assemblages. However, the combined microscopic and macroscopic approaches revealed that elementary reactions by single phase can be representative for the bulk sorption reaction in complex mineral assemblages.
Shimizu, Ryo; Suzuki, Mitsutoshi; Sakurai, Satoshi; Tamai, Hiroshi; Yamamura, Tsukasa; Naoi, Yosuke; Kuno, Yusuke
JAEA-Review 2011-038, 116 Pages, 2012/02
JAEA-Review-2011-038.pdf:21.45MB
International forum on peaceful use of nuclear energy and nuclear non-proliferation was held at Gakushi-kaikan, Tokyo on February 2-3, 2011 in cooperation with The Japan Institute of International Affairs (JIIA) and The University of Tokyo Global COE. In our International Forum, we would like to encourage active discussion of international challenges to and solutions for compatibility between peaceful use of nuclear energy and nuclear non-proliferation, and international cooperation for emerging nuclear energy states. It was successfully carried out with as many as 310 participants and a lot of discussions. This report includes abstracts of keynote speeches, summary of panel discussions and materials of the presentations in the forum.
Kuno, Yusuke; Naoi, Yosuke; Yamamura, Tsukasa
Nihon Genshiryoku Gakkai-Shi ATOMO
, 52(6), p.346 - 351, 2010/06
Japan has been promoting the peaceful use of nuclear energy, ensuring compliance with international norms relating to nuclear non-proliferation. Japan has also played a role for the promotion of nuclear disarmament. On the other hand concerns about nuclear proliferation have been raised in the world, the situation threatens the peaceful use of nuclear energy. In the field of peaceful use of nuclear energy and the nuclear non-proliferation (arms) it is becoming increasingly important that Japan leads the world to contribute concretely. It needs to overcome many challenges. This report summerizes the discussion at the International Forum on Peaceful Use of Nuclear Energy and Nuclear Nonproliferation/Nuclear Disarmament to be held in December 2009. Authors report and consider the future challenges as well as efforts against those based on the discussion.
