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Journal Articles

Sorption distribution coefficients of selenium on a sandy mudstone under reducing conditions of underground

Iida, Yoshihisa; Kimura, Yuichiro*; Yamaguchi, Tetsuji; Ueda, Masato*; Tanaka, Tadao; Nakayama, Shinichi

Genshiryoku Bakkuendo Kenkyu, 15(2), p.57 - 67, 2009/03

Sorption of radionuclides on rocks is an important factor for safety assessments of geologic disposal of radioactive wastes. Batch sorption tests were conducted to investigate effects of concentrations of NaNO$$_{3}$$ and NaCl on sorption distribution coefficients(Kd) of selenium(Se) on a sandy mudstone under reducing environment of underground. The rock and groundwater used in the tests were sampled from depths of 129-156 m with special care minimizing contact with air. Se was spiked as HSe$$^{-}$$ or Se$$_{4}$$$$^{2-}$$ to the test solutions and kept as HSe$$^{-}$$ throughout the test periods by keeping reducing conditions (Eh, pH) of the solutions. Obtained Kd values were in a range of 0.015-0.037 m$$^{3}$$ kg$$^{-1}$$, which were as high as those for a typical sorbing element, Cs.

Journal Articles

Dose calculation system for remotely supporting radiotherapy

Saito, Kimiaki; Kunieda, Etsuo*; Narita, Yuichiro*; Kimura, Hideo; Hirai, Masaaki*; Deloar, H. M.*; Kaneko, Katsutaro*; Ozaki, Masahiro*; Fujisaki, Tatsuya*; Myojoyama, Atsushi*; et al.

Radiation Protection Dosimetry, 116(1-4), p.190 - 195, 2005/12

 Times Cited Count:2 Percentile:17.64(Environmental Sciences)

A dose calculation system for providing accurate dose distribution in a patient body is under developing for supporting radiotherapy using photons and electrons. In this system, a sophisticated human model, a precise accelerator head model, and a Monte Carlo calculation will be utilized to perform realistic simulation. The dose distribution is calculated by this system on the ITBL computer at the dose calculation center, and the related data are transferred through a network. This system is intended to support the quality assurance of current treatments carried out in Japan. Further, this system is planned to apply to advanced radiotherapy. The project started on November 2003 and is scheduled to continue for five years. Prototypes of some parts constituting the system have been already developed, and the fundamental features on the radiation fields have been investigated. On the basis of the fundamental investigation, the final system will be designed and constructed.

Journal Articles

Experimental study on long-term safety assessment considering uncertainties for geological disposal of radioactive wastes; JAERI status at 2005

Yamaguchi, Tetsuji; Sakamoto, Yoshifumi; Iida, Yoshihisa; Negishi, Kumi; Taki, Hiroshi; Akai, Masanobu; Jinno, Fumika; Kimura, Yuichiro; Ueda, Masato; Tanaka, Tadao; et al.

Proceedings of International Conference on Nuclear Energy System for Future Generation and Global Sustainability (GLOBAL 2005) (CD-ROM), 6 Pages, 2005/10

no abstracts in English

Oral presentation

Determination of distribution coefficients on rocks under maintained reducing conditions of underground, 1; Considerations on reducing conditions of underground

Yamaguchi, Tetsuji; Kimura, Yuichiro; Iida, Yoshihisa; Tanaka, Tadao; Nakayama, Shinichi; Ueda, Masato*; Araki, Kunio*

no journal, , 

no abstracts in English

Oral presentation

Determination of distribution coefficients on rocks under maintained reducing conditions of underground, 2; Consideration on conditions of sorption tests

Kimura, Yuichiro; Yamaguchi, Tetsuji; Iida, Yoshihisa; Tanaka, Tadao; Nakayama, Shinichi; Ueda, Masato*; Araki, Kunio*

no journal, , 

no abstracts in English

Oral presentation

Experimental research for long term evaluation on radioactive waste disposal; Progress in 2006

Tanaka, Tadao; Yamaguchi, Tetsuji; Iida, Yoshihisa; Kimura, Yuichiro; Taki, Hiroshi; Fujiwara, Takeshi; Ueda, Masato*; Mukai, Masayuki; Yamada, Fumika; Mizuno, Tsuyoshi; et al.

no journal, , 

no abstracts in English

Oral presentation

Experimental research for long term evaluation on radioactive waste disposal; Progress in 2007

Kimura, Yuichiro; Yamaguchi, Tetsuji; Iida, Yoshihisa; Otsuka, Ichiro; Taki, Hiroshi*; Mukai, Masayuki; Yamada, Fumika; Hoshino, Seiichi; Kadowaki, Mitsushi; Tanaka, Tadao; et al.

no journal, , 

no abstracts in English

Oral presentation

The Effects of NaNO$$_{3}$$ and NaCl concentrations on sorption distribution coefficients of hydrogen selenide anion (HSe$$^{-}$$) on a sandy mudstone

Kimura, Yuichiro; Yamaguchi, Tetsuji; Iida, Yoshihisa; Tanaka, Tadao; Nakayama, Shinichi

no journal, , 

no abstracts in English

Oral presentation

Heavy-ion fusion and fission study at JAEA

Hirose, Kentaro; Nishio, Katsuhisa; Ikezoe, Hiroshi; Mitsuoka, Shinichi; Nishinaka, Ichiro; Makii, Hiroyuki; Wakabayashi, Yasuo*; Tsukada, Kazuaki; Asai, Masato; Nagame, Yuichiro; et al.

no journal, , 

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