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Yamaguchi, Tetsuji; Negishi, Kumi; Ebashi, Katsuhiro; Inagaki, Shingo*; Shibata, Mitsunobu*; Tanaka, Tadao; Nakayama, Shinichi
JAERI-Conf 2004-011, p.139 - 140, 2004/07
Uncertainties should be quantitatively assessed in a long-term assessment of radioactive waste disposal. We focus our experimental efforts on parameters that induce major uncertainties in the radionuclide migration analysis and that have not been quantitatively understood. Solubility of radionuclides, diffusion in bentonite buffer material and sorption on rocks were investigated to quantify the uncertainties associated with the parameters and to minimize the uncertainties.
Ban, Yasutoshi; Mineo, Hideaki; Asakura, Toshihide; Hotoku, Shinobu; Matsumura, Masakazu; Kim, S.-Y.; Morita, Yasuji
JAERI-Conf 2004-011, p.101 - 102, 2004/07
Experimental studies and numerical analysis on physical and chemical behavior of actinide elements in the solutions of aqueous reprocessing process have been done for compiling technical data that are necessary for evaluating processes such as reprocessing facilities. The objective of the present study is obtaining technical data that are conductive to the construction of reprocessing process that cope with high burn-up nuclear fuel, the evaluation of nuclear fuel cycle, and the drawing up policy on reprocessing.
Kanno, Mitsuhiro*; Takeda, Seiji; Minase, Naofumi; Kato, Hideo; Kimura, Hideo
JAERI-Conf 2004-011, p.131 - 132, 2004/07
no abstracts in English
Takeda, Seiji; Minase, Naofumi; Kimura, Hideo
JAERI-Conf 2004-011, p.133 - 134, 2004/07
no abstracts in English
Oda, Chie; Mihara, Morihiro; Honda, Akira
JAERI-Conf 2004-011, p.155 - 156, 2004/07
The use of cementitious materials and bentonite is envisaged in the construction of geological disposal facilities for TRU wastes. Groundwaters that have reacted with these materials should widely change in the chemical conditions due to the cement degradation and the bentonite alteration. In this study, a number of thermodynamic calculations were carried out for estimating the groundwater chemistry in the engineerd barrier systems in TRU waste repository.
