Numerical Simulation on Radon Retardation Behavior of Covering Floats in Radon-Containing Water  

作　　者：LIU Shu Yuan ZHANG Li YE Yong Jun DING Ku Ke 

机构地区：[1]National Institute for Radiological Protection,Chinese Center for Disease Control and Prevention,Beijing 100088,China [2]Office for Public Health Management,Chinese Center for Disease Control and Prevention,Beijing 102206,China [3]Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy,University of South China,Hengyang 421001,Hunan,China

出　　处：《Biomedical and Environmental Sciences》2024年第4期406-417,共12页生物医学与环境科学（英文版）

基　　金：supported by a grant from the National Natural Science Foundation of China(Grant nos.31770907,31640022);the National Natural Science Foundation of China(Grant No.11575080);the Natural Science Foundation of Hunan Province,China(Grant No.2022JJ30482).

摘　　要：Objective This study aimed to efficiently reduce the release of radon from water bodies to protect the environment.Methods Based on the sizes of the experimental setup and modular float,computational fluid dynamics(CFD)was used to assess the impact of the area coverage rate,immersion depth,diffusion coefficient,and radon transfer velocity at the gas–liquid interface on radon migration and exhalation of radon-containing water.Based on the numerical simulation results,an estimation model for the radon retardation rate was constructed.The effectiveness of the CFD simulation was evaluated by comparing the experimental and simulated variation values of the radon retardation rate with the coverage area rates.Results The effect of radon transfer velocity on radon retardation in water bodies was minor and insignificant according to the appropriate value;therefore,an estimation model of the radon retardation rate of the coverage of a radon-containing water body was constructed using the synergistic impacts of three factors:area coverage rate,immersion depth,and diffusion coefficient.The deviation between the experimental and simulated results was<4.3%.Conclusion Based on the numerical simulation conditions,an estimation model of the radon retardation rate of covering floats in water bodies under the synergistic effect of multiple factors was obtained,which provides a reference for designing covering floats for radon retardation in radoncontaining water.

关 键 词：Radon-containing water Radon retardation rate CFD Coverage experiment Optimized design 

分 类 号：X52[环境科学与工程—环境工程]