2013—2017年宁德核电站周围食品中90Sr放射性水平调查

目的 了解宁德核电站运行后核电站周围监测点区域内放射性核素⁹⁰Sr放射性水平，并与其对照区域⁹⁰Sr放射性水平进行比较。方法 在宁德核电站周边30 km范围内的监测点区域及其对照点区域进行布点，采集食品样品，利用二-（2-乙基已基）磷酸脂萃取色层法对食品样品中⁹⁰Sr放射性水平进行分析。结果 本次调查共完成宁德核电站周围监测区域及对照区域的6大类，30个品种的食品样品中⁹⁰Sr放射性水平的分析。监测区域内，谷类薯类及杂豆类样品中⁹⁰Sr的放射性比活度范围为0.017~1.830 Bq/kg，蔬菜类样品为0.021~0.318 Bq/kg，水产品类样品为0.007~7.690 Bq/kg，畜禽肉类样品为0.009~0.184 Bq/kg。对照区域内，谷类薯类及杂豆类样品中⁹⁰Sr含量测量范围为0.017~0.700 Bq/kg，蔬菜类为0.034~0.677 Bq/kg，水产品类为0.038~3.360 Bq/kg，畜禽肉类为0.019~0.054 Bq/kg。结论 本次调查的食品中⁹⁰Sr放射性水平均远低于我国食品标准限值，食入所致的居民内照射剂量对公众剂量的贡献极低。

Investigation on 90Sr concentrations in foods near Ningde Nuclear Power Plant in 2013-2017

Objective To investigate the ⁹⁰Sr concentration levels in the monitoring areas and the control area at Ningde Nuclear Power Plant (NPP). Methods Food samples were collected from the monitoring areas in 30 km of Ningde NPP and the control area far away. The radioactive levels of ⁹⁰Sr in food samples were analyzed using the chromatography with 2-(2-ethylhexyl) phosphate fast extraction method. Results In this survey, ⁹⁰Sr radioactive concentrations in 30 varieties of foods in 6 categories were analyzed. In the monitoring area, ⁹⁰Sr radioactivity concentration in the samples collected were in the range of 0.017-1.830 Bq/kg for cereals, beans and potatoes, 0.021-0.318 Bq/kg for vegetables, 0.007-7.690 Bq/kg for quatic products, and 0.009-0.184 Bq/kg for meats; whereas, in the control area, cereals, beans and potatoes in 0.017-0.700 Bq/kg, vegetables in 0.034-0.677 Bq/kg, aquatic products in 0.038-3.360 Bq/kg, and meats in 0.019-0.054 Bq/kg. Conclusions The ⁹⁰Sr radioactive concentrations in foods were far below the food standard limits in this survey. The contribution of evaluated to the public from the ⁹⁰Sr in foods was neglectable.