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Numerical simulation on dynamic migration behaviour of radon of the exposed beach surface under non-isothermal conditions

Zhou Ning|Ye Yongjun|Yu Ting
한국원자력학회 (Korean Nuclear Society)|2025.09|Nuclear Engineering and Technology|제57권 제9호|DOI 10.1016/j.net.2025.103638

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키워드

CFDRadon exhalation rateUnder non-isothermal conditions
주제분류원자력공학

초록

Seasonal climate change profoundly affects radon release from uranium tailings beaches. This study evaluates radon migration in uranium tailings reservoirs by developing a non-isothermal radon migration model that incorporates freeze-thaw cycles. Using Computational Fluid Dynamics (CFD) numerical simulations combined with temperature and moisture control equations, the research analyzes the effects of atmospheric temperature variations on radon migration. The study examines the migration and exhalation patterns during typical heating and cooling stages. Findings reveal that both temperature and effective water saturation significantly influence radon migration parameters. Specifically, radon exhalation rates increase with tailings temperature, while freezing conditions notably restrict radon migration and release. This research provides a theoretical foundation for dynamically estimating radon exhalation rates and assessing radon pollution on uranium tailings surfaces in response to seasonal temperature fluctuations

Abstract

Seasonal climate change profoundly affects radon release from uranium tailings beaches. This study evaluates radon migration in uranium tailings reservoirs by developing a non-isothermal radon migration model that incorporates freeze-thaw cycles. Using Computational Fluid Dynamics (CFD) numerical simulations combined with temperature and moisture control equations, the research analyzes the effects of atmospheric temperature variations on radon migration. The study examines the migration and exhalation patterns during typical heating and cooling stages. Findings reveal that both temperature and effective water saturation significantly influence radon migration parameters. Specifically, radon exhalation rates increase with tailings temperature, while freezing conditions notably restrict radon migration and release. This research provides a theoretical foundation for dynamically estimating radon exhalation rates and assessing radon pollution on uranium tailings surfaces in response to seasonal temperature fluctuations

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