雄安新区环境水体中放射性水平研究与评价

Research and Evaluation of Radioactive Levels in Environmental Water in Xiong'an New District

通过研究雄安新区环境水体中放射性水平,估算其所致有效剂量,并对周边居民经饮水途径引起的健康风险进行了评估,充实了雄安新区放射性水平基线数据。在雄安新区全境范围内采集有代表性的地表水、地下水、饮用水,依据标准方法对水中^(238)U、^(232)Th、^(226)Ra、^(40)K、^(90)Sr、^(137)Cs、^(3)H等核素进行分析检测,估算居民饮水摄入放射性所致待积有效剂量。地表水、地下水、饮用水中^(238)U、^(232)Th、^(226)Ra、^(40)K、^(90)Sr、^(137)Cs、3H的放射性水平在全国本底水平范围内,饮用水中总α、总β活度浓度水平均低于GB 5749—2006《生活饮用水卫生标准》中规定的放射性指标指导值。水体中主要放射性核素对周围生活居民造成的年有效剂量贡献十分有限,饮入后不会对居民的健康造成影响。

By studying the radioactivity level in the environmental water of Xiong'an New District,estimating the effective dose,the health risks caused by drinking water to surrounding residents were assessed,and the baseline data of radioactivity level in Xiong'an New District was enriched.Representative surface water,groundwater and drinking water were collected throughout the whole territory of Xiong'an New District,and radionuclides such as^(238)U,^(232)Th,^(226)Ra,^(40)K,^(90)Sr,^(137)Cs and 3H in the water were analyzed and detected according to the standard methods,so as to estimate the annual effective dose to be accumulated due to the radioactive intake of residents from drinking water.The average radioactivity of^(238)U、^(232)Th、^(226)Ra、^(40)K、^(90)Sr、^(137)Cs and~3H in environmental water of Xiong'an New District are within the national background level,the activity concentration levels of grossαand grossβin drinking water are lower than the guide value of radioactivity index stipulated in"Sanitation Standard for Drinking Water"(GB 5749—2006).The contribution to the annual effective dose to the surrounding residents is very low,and it will not affect the health of the residents after drinking water.