中南大学学报（自然科学版）2013，Vol.44Issue(2)：829-834,6.
铀矿通风尾气中气态放射性核素氡大气扩散数值模拟
Numerical simulation of atmospheric dispersion of gas radioactive nuclides radon from uranium ventilation shaft exhausts
摘要
Abstract
Uranium mine ventilation shaft physical model and dispersion mathematical model of radon were built, CFD methods were used to solve equations and get the atmospheric wind field structure and distributions of radionuclide concentrations of radon on the atmospheric wind speeds (0.5, 1.0, 2.0, 4.0 m/s) and underlying surface roughness conditions (0.1 m, 1.0 m). The numerical results show that the atmospheric wind speeds and surface roughness have important effects on the dispersion of radon. When the atmospheric wind speed is less than 0.5 m/s, the underlying surface roughness has the dominant effects on the dispersion of radionuclides. The greater the surface roughness, the higher the concentration of radon and more serious the local pollution, so the main pollution is within the region of 100 m. When the atmospheric wind speed is greater than 2.0 m/s, atmospheric air speeds have the pronounced effects on dispersion of radon. The faster the atmospheric wind speed, the stronger the diffusion capacity and the farther the distance, so the main pollution is within the region of 400 m. Numerical methods and results in this work can provide some reference basis for uranium areas radiation protection and new uranium mining site-selecting.关键词
铀矿井通风/数值模拟/大气扩散/辐射防护/氡Key words
uranium mine ventilation shaft/ numerical modeling/ atmospheric dispersion/ radiation protection/ radon分类
资源环境引用本文复制引用
谢东,王汉青,刘泽华,叶勇军,熊军..铀矿通风尾气中气态放射性核素氡大气扩散数值模拟[J].中南大学学报（自然科学版）,2013,44(2):829-834,6.基金项目
国家自然科学基金资助项目(11105068) （11105068）
湖南省教育厅优秀青年项目(11B108) （11B108）
