近十年南京市辐射环境质量的变化趋势与分析

Analysis on Change Trend of the Radiation Environmental Quality over the Past Ten Years in Nanjing City

摘要: 目的：通过对2012~2021年南京市辐射环境质量监测数据的分析，总结十年间全市辐射环境质量的变化规律，为今后辐射监管提供科学依据。方法：根据江苏省辐射环境质量监测方案，对南京市省(国)控点的γ辐射空气吸收剂量率、γ辐射累积剂量、饮用水、长江水体、土壤和气溶胶中的放射性核素含量进行监测。结果：2012~2021年南京市各省(国)控点γ辐射空气吸收剂量率和γ辐射累积剂量均在江苏省天然本底范围之内；饮用水和长江水体中的总α和总β放射性活度均低于国家限值；土壤和气溶胶中放射性核素的含量均在江苏省天然本底涨落范围内。结论：南京市辐射环境质量总体良好，空气、水体和土壤未受人工放射性核素的污染。

Abstract: Objective: Through the analysis of the radiation environmental quality monitoring data of Nanjing from 2012 to 2021, the change law of the radiation environmental quality of Nanjing in the past ten years was summarized, so as to provide a basis for future radiation supervision. Methods: According to the radiation environment quality monitoring plan of Jiangsu Province, the absorbed dose rate of γ-radiation in air, cumulative dose of γ-radiation, the content of radionuclides in drinking water, water body of Yangtze River, soil and aerosol of provincial (national) control points in Nanjing was monitored. Results: From 2012 to 2021, the absorbed dose rate of γ-radiation in air and the cumulative dose of γ-radiation at the provincial (national) control points in Nanjing were within the natural background of Jiangsu Province. The total α and total β radioactivity in drinking water and Yangtze River water were lower than the national limit. The contents of radionuclides in soil and aerosol were within the range of natural background fluctuation in Jiangsu Province. Conclusion: The radiation environment quality in Nanjing is generally good, and the air, water and soil are not contaminated by artificial radionuclides.