某核电厂放射性流出物及外围环境样品中氚和碳-14的监测

Monitoring of Tritium and Carbon-14 in Radioactive Effluent and Peripheral Environmental Samples of a Nuclear Power Plant

本文介绍了广东省环境辐射监测中心自2017年以来对某核电厂放射性流出物及外围环境样品中氚和碳-14的监督性监测情况。结果表明:该核电附近空气中偶尔可监测到高于探测限的氚,液态流出物排放口附近海水中能监测到高于本底水平的氚,未出现累积效应;核电附近降水、地表水、饮用水、地下水、生物样品及厂内监测井水中的氚均小于探测限;核电附近的空气碳-14和生物碳-14与对照点分析结果处于同一放射性水平,未发现异常。该核电厂流出物氚和碳-14的排放满足国家审管部门的批复要求。

Tritium and carbon-14 are the main nuclides for emission control of effluents from nuclear power plants,and they are also the key nuclides for radiation environment monitoring around nuclear power plants.This paper introduces the supervisory monitoring of tritium and carbon-14 in radioactive effluents and peripheral environmental samples of a nuclear power plant by Guangdong Environmental Radiation Monitoring Center since 2017.The results showed that the discharge of tritium and carbon-14 from the effluent of the nuclear power plant meets the approval requirements of relevant national departments.Occasionally,tritium above the detection limit can be detected in atmospheric samples near the nuclear power plant,and tritium above the background level can be detected in seawater near the liquid effluent discharge outlet,without tritium cumulative effect.The tritium content of other samples is less than the detection limit,including precipitation,surface water,drinking water,groundwater,biological samples,and monitoring well water in the nuclear power plant.There is no abnormal carbon-14 level in atmospheric and biological samples.