陕西省石煤矿放射性水平调查分析

Investigation and Analysis on Radioactivity Level of Bone-coal Mine in Shaanxi Province

为了掌握陕西省石煤矿的辐射环境现状,对陕西省3个石煤矿进行了放射性水平调查,结果表明陕西省石煤中238 U、226 Ra平均比活度分别为当地环境本底的26~35倍、19~30倍,γ辐射水平为当地天然环境本底的4~7倍,各工作场所及周边环境的222 Rn及其子体浓度处于正常范围之内。石煤开发活动所致矿区作业人员、公众年附加有效剂量满足国家标准相关限值要求。

In order to understand the radiation environment status of bone-coal mines in Shaanxi, radio- activity level of three bone-coal mines in Shaanxi Province was investigated. The investigation result showed that the mean specific activity of 238 U 226Ra were respectively 26-35 times and 19430 times higher than that of the background. The γ-radiation dose rate of the bone-coal was 4 - 7 times higher than background value of the local natural environment. The concentration of 222 Rn and its daughters in the workplace and the surrounding environment was within the range of normality. The additional effec- tive dose of mine workers and the public which caused by the development and utilization of bone-coal are within the relevant national standard limit.