摘要
为了指导铀矿排风井周边地表环境的辐射防护设计,基于放射性气态流出物大气扩散的高斯烟羽模型,建立了铀矿排风井周边地表年均氡浓度以及公众个人年有效剂量的数学计算模型,研究了排风井气态流出物初始氡浓度、排风风量和源强对排风井周边地表1 km范围内年均氡浓度以及公众个人年有效剂量分布的影响.结果表明,在其他参数不变的情况下,年均氡浓度和公众个人年有效剂量的最大值随气态流出物初始氡浓度的增加而增大,随排风风量的增加而减小;最大值离井口的距离和氡致辐射的影响范围随初始氡浓度的增加而增大,随排风风量的增加而减小;相同源强下,最大值随气态流出物的初始氡浓度增加而增大,随排风风量的增大而减小;最大值离井口的距离随排风风量的增加而增大.最后,根据所得结论提出铀矿排风井周边的辐射防护建议.
In order to instruct the radioactive protection design for the surface around uranium mine exhaust outlet,Gauss plume model on gaseous effluent aerial migration for the uranium mine exhaust outlet was built,and the influences of initial radon concentration of gaseous effluent,wind volume,and source intensity on the annual average values of radon concentration and individual effective dose for general around 1 km of exhaust outlet in a certain uranium mine were studied.The results show that,under the condition of other parameters unchanged,the maximum value of the annual average values of radon concentration and individual effective dose for general increase with the increase of the initial value of radon concentration of gaseous effluent,decrease with the increase of the wind volume;the distance of the maximum value from exhaust pithead and the distribution range of contour map increase with the value of radon concentration of gaseous effluent,decrease with the increase of wind volume;with the source intensity unchanged and the increase of the initial value of radon concentration of gaseous effluent,the maximum increase,the distance of the maximum value from exhaust pithead as well as the distribution range of contour map decrease;with the source intensity unchanged and the increase of wind volume,the maximum decrease,the distance of the maximum value from exhaust pithead as well as the distribution range of contour map increase.Finally,according to above conclusions the suggestion for radiation protection for the environment around the uranium exhaust outlet was proposed.
作者
叶勇军
李实
黄春华
丁德馨
钟永明
谢超
YE Yong-jun;LI Shi;HUANG Chun-hua;DING De-xin;ZHONG Yong-ming;XIE Chao(School of Environment and Safety Engineering,University of South China,Hengyang,Hunan 421001,China;Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy,University of South China,Hengyang,Hunan 421001,China;School of Civil Engineering,University of South China,Hengyang,Hunan 421001,China)
出处
《南华大学学报（自然科学版）》
2018年第1期1-9,共9页
Journal of University of South China：Science and Technology
基金
国家自然科学基金项目(11575080)
南华大学博士科研启动基金项目(2015XQD38)
环保部核与辐射安全监管基金项目(2016KHX54)
关键词
高斯烟羽模型
铀矿排风井
氡浓度
公众个人剂量
Gauss plume model
uranium mine exhaust outlet
radon concentration
individual effective dose for general
