中文摘要：

以某铀尾矿库为研究对象，从源的强度、当地气候、地形等，分析了铀尾矿库主要风频下风向区域的氡浓度分布，及其所致的公众年有效剂量。结果表明，高斯模式理论计算和实际测量结果比较吻合，说明氡在大气扩散的高斯模式理论计算只要参数选择合理此方法是可行的。以公众年有效剂量限值为标准，验证了该铀尾矿库辐射安全距离内居民的辐射剂量在国家限值标准以内，建议根据现场实际，合理地确定安全防护距离。

英文摘要：

Regarding a uranium railings as the study case and in aspects of the source intensity, local climate and topogra phy characteristics, this paper makes an attempt to analyze radon concentration distribution and the individual effective dose of main tailing downwind. The results show that Gauss model numerical results are consistent with the measurement results, indicating that Gauss model theory calculation method of radon diffusion in the atmosphere is feasible under reasonable pa rameters. According to national public dose limit personal standards, the individual effective dose of the public within radia tion safety protection distance is verified, which satisfies limit standards of the state. For the actual situation, appropriate adjustments can be made to determine reasonable safety protection distance.