辐射环境影响评价是环境评价的重要组成部分.针对隧道工程建设的特点,以粤北某隧道工程为例,对其辐射环境预测及其影响评价进行研究,构建辐射环境预测模型,重点预测隧道内γ辐射剂量率、隧道内氡释放量,并利用空气模型对空气氡扩散进行估算.通过辐射照射剂量估算,探讨隧道工程对周围公众及施工人员辐射照射影响.特别是在铀矿资源丰富的粤北地区修建隧道工程时,更有针对性地加强辐射环境管理,最大限度地减少周围环境以及施工人员的辐射影响.
Radiation environment impact assessment is an important part of the environment assessment.According to the characteristics of tunnel construction,taking a tunnel project of the Northern Guangdong as an example,the radiation environment forecast and its impact assessment were studied,building the radiation environment prediction model,predicting the γradiation dose rate of the tunnel and the amount of radon in the tunnel,estimating the diffusion of radon in air by air model,discussing the influence of the tunnel project on the radiation exposure of the surrounding public and construction workers basing on the estimated radiation dose.The radiation environment management could be strengthened.The additional radiation dose of environment and construction workers could be minimized,especially in the uranium-rich Northern Guangdong.