放射性廃棄物 (5)

[VII-160] Study on the effect of fracture information set by in-situ data in terms of mass transport calculation

*田部井 和人¹、並川 正¹、羽根 幸司¹、升元 一彦¹、森川 誠司¹、杉田 匠平²、関野 真登³ (1. 鹿島建設株式会社、2. ダイヤコンサルタント、3. 地層科学研究所)

Keywords:discrete fracture network model, seepage analysis, mass transport time, Radioactive waste

In the safety assessment of geological disposal, it is important to evaluate mass transport time and pathway in the natural barrier system. In fractured rock mass, since fractures dominate the permeability, it is particularly necessary to evaluate the groundwater behavior by taking the fractures into account. We built several DFN(discrete fracture network) models with varying amount of in-situ data at underground gallery at Aspo Hard Rock Laboratory and performed analytical case study. In this paper, comparison of these models in terms of mass transport time are described.