摘要
气溶胶中的γ核素是核电厂辐射环境监测中的重点关注项目。为掌握防城港核电厂周围环境气溶胶中γ核素放射性水平及变化趋势,自2016年1月起,对防城港核电厂周边10km范围内的沙螺寮、红沙、仙人岛三个点位的气溶胶进行连续取样和监测,结果表明:气溶胶中^(54)Mn、^(58)Co、^(60)Co、^(137)Cs等人工γ核素未检出,7Be活度浓度随季节变化,夏秋季低冬春季高。监测结果与运行前本底调查监测结果处于同一水平,说明核电厂运行未对周围环境造成明显的辐射影响。
The monitoring ofγradioactivity in atmospheric aerosol is critical in environmental monitoring around nuclear facilities.This study aimed to investigate the status and trend ofγradioactivity in atmospheric aerosol around Fangchenggang Nuclear Power Plant(NPP)during 2016~2019,including three observatories of Shaluoliao,Hongsha,and Xianrendao.It was shown that the activity concentrations of the focusedγ-nuclides that released from the gaseous effluent of Fangchenggang NPP were all below the minimum detection concentrations(MDC),while the values 7Be were lower in summer and higher in winter.The monitoring results are at the same level as the background,the operation of the Fangchenggang NPP is safe.
作者
毛位新
王磊
林明媚
李玮衡
邓旋
龚行健
Mao Weixin;Wang Lei;Lin Mingmei;Li Weiheng;Deng Xuan;Gong Xingjian(Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Regio,Nanning 530222,China)
出处
《核安全》
2021年第5期34-38,共5页
Nuclear Safety
关键词
气溶胶
γ核素
放射性水平
atmospheric aerosol
γ-nuclide
radioactivity level
