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Takeda, Masaki; Ishii, Eiichi; Ono, Hirokazu; Kawate, Satoshi
no journal, ,
no abstracts in English
Ito, Tsuyoshi*; Tachi, Yukio; Nemoto, Kazuaki*; Sato, Tomofumi*; Takeda, Masaki; Ono, Hirokazu
no journal, ,
To validate the mass transfer model in sedimentary rocks, in-situ tracer test in rock matrix was conducted at rock matrix at 350 m deep drift in the Horonobe URL. The modeling results were evaluated to be reasonable by comparing in-situ and laboratory data.
Ono, Hirokazu; Takeda, Masaki; Ishii, Eiichi; Tachi, Yukio
no journal, ,
It is necessary to clarify the mass transport behavior in a deep underground natural barrier, for improving the reliability of safety assessment of high-level radioactive waste disposal. This study reports an analysis using data from in situ tracer tests for fractures in mudstone at Horonobe Underground Research Laboratory (URL).
Murayama, Shota*; Takeda, Masaki; Ono, Hirokazu; Tachi, Yukio
no journal, ,
To evaluate mass transport in a fault zone containing multiple fractures, it is necessary to develop an mass transfer model based on the characteristics of the actual fault zone, and to conduct an in-situ tracer test. It is important to obtain information on the transport path and parameters through the tracer test. This paper presents the results of the tracer test conducted in a fault zone in the 350m research drift of Horonobe URL. The spatial distributions of the fractures and transport paths were evaluated based on the observation of the core sample collected after the tracer test and the tracer concentration analysis on the fracture surface. Furthermore, the transport model was applied and validated thorough the interpretation of the test results.