| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 99 === Nuclear energy power generation is major in Taiwan. But the spent fuel will produce higher temperature in nuclear power station. Deep geological disposal used worldwide for radioactive spent fuel, which needs to be completely isolated form human life cycle.
Based upon the concept of the deep disposal method. Our study uses finite element method and conducts analysis of the coupled thermo-hydro-mechanical calculations. The heat conduction analysis uses the Fourier’s law of heat conduction to obtain the temperature field. The temperature diffusion rate is consequently increased. Hydraulic calculation uses Darcy’s law, generalized Hooke’s law and effective stress theory.
In addition of considering the size of repository, initial condition and boundary condition of the internal paper. Consider the internal source, we used the buffer material is Zhishin clay. The effect due to water saturation is discussed and compared with experiment results of materials.
After the completion of the emplacement, filling and sealing, the invasion of the groundwater is not avoidable. The hydraulic conductivities of materials and pore pressure boundary condition will influence the rate of saturation. The study directed at the influences of the saturation histories on the hydro conductivity of the disposal.
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