Importance of Stress and Temperature-Dependent Permeability of Rocks and its Application in Underground Nuclear Waste Disposal

Water flow is an essential factor in the sealability of any underground cavern, including those for nuclear waste disposal, and significantly affected by permeability rock. The rocks various factors, stress temperature. rock changes excavating a temperature decay heat from waste, change induces thermal stress. Therefore, water around such caverns must be evaluated considering effects Numerical analyses migration disposal have been carried out. However, studies temperature-dependent may not published yet. To demonstrate necessity to consider temperature-dependency permeability, equations that represent post-failure as function average effective were proposed. inflow was numerically calculated simple cavern with or without dependency which showed significance dependency. Also, importance types demonstrated three granite, sandstone, tuff full-scale radioactive site permeability. A high could expected granite sandstone but tuff. Introducing contribute thoughtful design repository types.