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JNC TJ8400 2000-005, 71 Pages, 2000/05
In this research, simulations with some parameters which characterize ground water flow and the reliability evaluation for the expansion of the calculation method of groundwater flow were carried out by using the radionuclide transport computations in nearfield heterogeneous porous media. Concretely contents are follows: (1)With the series of calculation method for three-dimensional saturated/unsaturated groundwater flow and one-dimensional radionuclide transport, the computational analyses with the parameters used in JNC report in 2000 was carried out and the influence of the different input flux was evaluated. (2)The examination of the application for the different ways of inverse laplace transformation which is used in one-dimensional radionuclide transport analysis code "MATRICS" was carried out. (3)The examination of the application of multi-element "MATRICS" (m-MATRICS) for radionuclide transport computations in nearfield heterogeneous porous media was carried out. (4)The series of calculation methods from three-dimensional saturated/unsaturated ground water flow simulation code to one-dimensional radionuclide transport simulation code was integrated.
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JAERI-M 87-142, 17 Pages, 1987/09
no abstracts in English
Atsumi, Hiroyuki*; Masumoto, Kazuhiko*; Ishii, Tomoko*; Jo, Mayumi*; Nakayama, Masashi; Ono, Hirokazu
no journal, ,
In the vertical disposal concept of high level radioactive waste, it is important to evaluate influence of the groundwater inflow into the disposal pits against performance of buffer material as an artificial barrier because the inflow might cause the erosion of buffer material. The target of this study was to estimate the inflow control technique (e.g. grouting) around the disposal pits using numerical analysis. The model for the simulation should be a discrete fracture network model when the groundwater mainly flows along the fractures in the rock mass, therefore, the discrete fracture network model was selected to estimate the inflow control technique in this study. The results of numerical flow analysis showed that the effectiveness of grouting for the disposal pits and the impact of grouting for the other disposal pits or surrounding disposal tunnel could be evaluated quantitatively.
Dan, Hanae*; Motoshima, Takayuki*; Kimura, Shun; Takeda, Masaki
no journal, ,
no abstracts in English
Ueda, Akihiro*; Kawakubo, Shohei*; Chijimatsu, Masakazu*; Matsui, Hiroya; Ozaki, Yusuke
no journal, ,
no abstracts in English
Dan, Hanae*; Motoshima, Takayuki*; Kimura, Shun; Takeda, Masaki
no journal, ,
no abstracts in English
Sekino, Masato*; Kawahara, Shuji*; Ishibashi, Masayuki*; Miyoshi, Takako*; Masumoto, Kazuhiko*; Takeuchi, Ryuji
no journal, ,
no abstracts in English