江苏省城市放废库辐射环境监测水平研究北大核心CSCD

随着核技术在各领域的广泛应用,辐射环境的安全受到越来越多的重视。以江苏省城市放废库为研究对象,从2015年起连续对放废库进行辐射环境监测6年。对放废库周围的γ辐射空气吸收剂量率,水源水中总α、总β以及土壤中放射性核素进行了监测,并对辐射监测结果进行了分析。研究结果表明γ辐射空气吸收剂量率敏感点范围为59.0~96.5 nGy/h,源库四周范围为81.92~103.32 nGy/h;水源的总α和总β范围分别为0.90×10^(-2)~5.87×10^(-2)Bq/L和3.00×10^(-2)~16.00×10^(-2)Bq/L。γ辐射空气吸收剂量率的变化主要与源库的距离和废源的管理有关;水体中放射性水平变化主要与年降水量有关;土壤中核素的变化主要与放射性气溶胶有关。所有变化均在本底范围内涨落,对环境几乎没有影响,可以确保辐射环境安全。

Research on radiation environment monitoring level of urban radioactive waste repository in Jiangsu province

With the widespread application of nuclear technology in various fields, radiation environment safety has received more and more attention. This article takes the urban radioactive waste storage in Jiangsu Province as the research object,. The radiation environment arround the radioactive waste storage has been continuously monitored for 6 years since 2015. The gamma radiation dose rate in the air around the radioactive waste storage, the gross alpha and gross beta in the water resources and the radionuclides in the soil have been monitored, and the radiation monitoring results are analyzed and evaluated. The results show that the mean range of the gamma radiation dose rate in the air at sensitive points is 59.0-96.5 nGy/h, the mean range around source storage is 81.92-103.32 nGy/h; the mean range of the gross alpha and gross beta in water resources are 0.90×10^-2-5.87×10^-2 Bq/L and 3.00×10^-2-16.00×10^-2 Bq/L, respectively. The changes in the gamma radiation dose rate in the air are mainly related to the distance from the source storage and the management of waste sources; the changes in the level of radioactivity in water are mainly related to the annual precipitation; the changes of radionuclides in the soil are mainly related to radioactive aerosols. All changes fluctuate within the background range, with almost no impact on the environment, which can ensure the the radiation environment safety.