Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 424, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.127550
Keywords
Radionuclide transport; Fractured rocks; Experimental techniques; Upscaling; Conceptual models
Categories
Funding
- National Key Research and Development Program of China [2018YFC1800900]
- National Natural Science Foundation of China [41972249, 41772253, 51774136]
- Program for Jilin University (JLU) Science and Technology Innovative Research Team [2019TD-35]
- Graduate Innovation Fund of Jilin University [101832020CX240]
- Engineering Research Center of Geothermal Resources Development Technology and Equipment, Ministry of Education, China
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This study focuses on the significant progress achieved in radionuclide transport in fractured rocks for geological disposal of high-level radioactive waste. It emphasizes the importance of accurately constrained transport models and discusses various issues in transport modeling, including parameter determination and upscaling. The paper provides valuable insights into radionuclide transport behavior and safety assessment for HLW repositories.
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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