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目的:调查分析全国首台AP1000核电机组安装后周围生活饮用水中n 90Sr和n 137Cs及食品中n 137Cs放射性水平及变化。n 方法:2012—2019年，选取全国首台AP1000核电机组所在的三门核电站周围的4个生活饮用水监测点，分别在丰水期和枯水期采集并测定n 90Sr和n 137Cs放射性活度浓度；采集当地产大米、包菜、鲫鱼和鲻鱼，测定分析n 137Cs放射性活度浓度。n 结果:2012—2019年，生活饮用水中n 90Sr和n 137Cs放射性活度浓度范围分别为1.2～9.8、0.2～8.1 mBq/L；食品中n 137Cs放射性活度浓度为1.1×10n -2～2.8×10n -1 Bq/kg，小于《食品中放射性物质限制浓度标准》(GB 14882-94)限制浓度。n 结论:全国首台AP1000核电机组安装后周围生活饮用水中n 90Sr和n 137Cs及食品中n 137Cs放射性水平平稳，调查数据显示未发现对环境带来影响。n “,”Objective:To investigate and analyze the radioactivity levels of n 90Sr and n 137Cs in drinking water and n 137Cs in food after the installation of the first AP1000 nuclear power unit in China.n Methods:From 2012 to 2019, four drinking water monitoring points around AP1000 nuclear power unit located at Sanmen nuclear power plant site were collected during the wet season and dry season, n 90Sr and n 137Cs and radioactivity concentrations were determined in drinking water. Local rice, cabbage, crucian and mullet were collected to determine the radioactivity concentration of n 137Cs.n Results:From 2012 to 2019, the radioactivity concentrations of n 90Sr and n 137Cs in drinking water were 1.2-9.8 mBq/L and 0.2-8.1 mBq/L, respectively. The radioactivity concentration of n 137Cs in food were 1.1×10n -2-2.8×10n -1 Bq/kg, lower than the limits specified in the n Limited concentrations of radioactive materials in foods (GB 14882-94).n Conclusions:After the installation of the first AP1000 nuclear power unit in China, the radioactivity levels of n 90Sr and n 137Cs in drinking water and n 137Cs in foods are stable, without environmental impact identified.n