| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 101 === Nuclear waste disposal is an important issue that every nuclear power country is very concerned. The management strategy in Taiwan is using dry storage and seeking overseas disposal. Before this project feasibility is confirmed, it will be continue to investigate the final disposal technique in the domestic. Deep geological disposal is recognized internationally as a feasible method.
In this study, using Taiwan Power Company ”The report of the host rock characteristics survey and assessment in final disposal of spent nuclear fuel plan.” Choosing its exploration data and disposal field size, using finite element method and 3D model to analysis.
Thermal stress analysis adopt sequentially coupled thermal-stress analysis. Because Taiwan is located in the earthquake zone, the earthquake may create weak band in the top of disposal field. This research will focus on the effect of weak band’s stiffness and length.
In this study, when the weak band’s length increases or stiffness decreases, the horizontal stress on the disposal site will increase. But the vertical stress will decrease. And when the weak band occurs, the water flow of the disposal site will increase, it may cause leakage of dangerous radionuclides.
Keywords: decay heat, spent nuclear fuel waste, deep geological disposal, granite.
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