| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Outline of Final Research Achievements |
Regarding disposal technique of High level radioactive waste, it is considered that geological disposal using multiplex barrier system is the better way in Japan at this time. Bentonite-based buffer material changes its condition from unsaturated to saturated by groundwater seepage into the buffer area. In unsaturated state, the behavior of buffer material is not so much considered than that in saturated state. Therefore, it is required to elucidate the behavior of unsaturated buffer material. Therefore, it is important to understand water movements in buffer materials to evaluate the contiguous performance of buffer materials.
This study aims to investigate water absorption properties of various bentonites. Based on the experimental results, this study proposed the evaluation method for water diffusivity of buffer material. The proposed method in this study will be available to design specifications of bentonite-based buffer materials from the viewpoint of water diffusion.
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