退役铀尾矿库保护性开放利用工程环境氡浓度调查研究

Radon Concentration in Protecting and Opening Utilization Project for a Decommissioned Uranium Tailings Pond

尾矿库作为常规铀矿冶系统地面最大的工程子项和放射性污染源之一,在利用寿期终了应进行退役治理,治理深度为有限制开放。为消除公众疑虑,对尾矿库环境氡采用固体径迹核累积测量法和短时连续测量法对该设施及周边环境开展了为期一年的空气氡浓度调查,基本查明了调查区周边的环境空气氡浓度水平,讨论氡浓度随季节分布和昼夜时间变化特征,运用自组织映射神经网络法对调查结果和影响因素进行系统分析,并对调查区内的氡气所致公众有效剂量当量进行评价。

Uranium tailings pondisone of the largest engineering sub-projects and radioactive pollution sources on the ground in conventional uranium mining and smelting systems.It hould be decommissioned and treated at the end of itslife.To reassure the public that nuclear accumulation of tailings,this study uses solid track environmental radon measurement method and the short-term continuous measurement method to analyze the radon concentration in surrounding environment during one year.The paper studied the basic certain radioactive-polluted area surrounding air radon level,discuss the radon concentration distribution and the seasons changes of day and night time.The self-organizing mapping neural network method was used to analyze the results and influencing factors,and the public effective dose equivalent caused by radon gas in the survey area was evaluated.