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Radionuclide transport in multi-scale fractured rocks: A review

Xiaoying ZhangCollege of Construction Engineering, Jilin University, Changchun 130026, ChinaFuning MaCollege of Construction Engineering, Jilin University, Changchun 130026, ChinaZhenxue DaiCollege of Construction Engineering, Jilin University, Changchun 130026, China; Engineering Research Center of Geothermal Resources Development Technology and Equipment, Ministry of Education, Jilin University, Changchun, China. Electronic address: [email protected]Wang JuCNNC Key Laboratory on Geological Disposal of High-Level Radioactive Waste, Beijing Research Institute of Uranium Geology, Beijing 100029, China; CAEA Innovation Center on Geological Disposal of High Level Radioactive Waste, ChinaLiang ChenCNNC Key Laboratory on Geological Disposal of High-Level Radioactive Waste, Beijing Research Institute of Uranium Geology, Beijing 100029, China; CAEA Innovation Center on Geological Disposal of High Level Radioactive Waste, ChinaHui LingCNNC Key Laboratory on Geological Disposal of High-Level Radioactive Waste, Beijing Research Institute of Uranium Geology, Beijing 100029, China; CAEA Innovation Center on Geological Disposal of High Level Radioactive Waste, ChinaMohamad Reza SoltanianDepartment of Geology, University of Cincinnati, Cincinnati, OH, USA; Departments of Environmental Engineering, University of Cincinnati, Cincinnati, OH, USA

2021en

ABI

Annotatsiya

Significant progress has been achieved on radionuclide transport in fractured rocks due to worldwide urgent needs for geological disposal of high-level radioactive waste (HLW). Transport models designed with accurately constrained parameters are a fundamental prerequisite to assess the long-term safety of repositories constructed in deep formations. Focusing on geological disposal systems of HLW, this study comprehensively reviews the behavoir of radionuclides and transport processes in multi-scale fractured rocks. Three issues in transport modeling are emphasized: 1) determining parameters of radionuclide transport models in various scales from laboratory- to field-scale experiments, 2) upscaling physical and chemical parameters across scales, and 3) characterizing fracture structures for radionuclide transport simulations. A broad spectrum of contents is covered relevant to radionuclide transport, including laboratory and field scale experiments, analytical and numerical solutions, parameter upscaling, and conceptual model developments. This paper also discusses the latest progress of radionuclide migration in multi-scale fractured rocks and the most promising development trends in the future. It provides valuable insights into understanding radionuclide transport and long-term safety assessment for HLW geological repository.

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DOI: 10.1016/j.jhazmat.2021.127550

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