Investigation and suitability study of pre-selected sites for geological disposal of high level radioactive waste

Based on the requirement of safe disposal of high-level radioactive waste, this study aims at the pre-selection area of the preferred pre-selection area of China's high-level radioactive waste disposal bank (Beishan pre-selection area). The data and materials of geology, hydrogeology, future natural change, geochemistry, construction and engineering, environmental protection and social economy were obtained by using the methods of geology, geophysics, hydrogeology and geochemistry. The constructability of preselected rock mass is demonstrated from the perspectives of engineering construction and engineering safety. The acceptability of the preselected rock mass in transport condition, land use, social economy and humanity was confirmed. On this basis, a relatively perfect site investigation and suitability comprehensive analysis method for the disposal warehouse is established, and a candidate site for the granite disposal warehouse is selected from the computational sub-section through the comprehensive analysis of site suitability and the comprehensive comparison of site identification and safety in the lot. The research results will directly serve the site screening and site characteristics evaluation of China's high-level radioactive waste geological disposal repository, and have important practical significance to ensure the safe management of nuclear waste and the sustainable development of nuclear energy in China.