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进一步了解掌握田湾核电站外围环境γ辐射水平。方法收集近十年间(2004~2013)田湾核电站外围环境γ辐射水平监测数据并进行分析。结果近十年来电站外围环境γ辐射水平累积剂量法监测年均值为95.2n Gy/h(65.5n Gy/h~133.6n Gy/h),环境γ辐射水平瞬时监测年均值为94.8n Gy/h(69.0n Gy/h~122.8n Gy/h)。结论近十年来田湾核电站外围γ辐射水平均在本底范围之内,且与电站运行前本底无显著差异,环境γ辐射所致公众年吸收剂量不大于0.96m Sv.
Learn more about the gamma radiation level at the periphery of Tianwan Nuclear Power Station. Methods The monitoring data of gamma radiation level in the periphery of Tianwan Nuclear Power Station during the past ten years (2004 ~ 2013) were collected and analyzed. Results The annual mean cumulative dose of γ radiation in power plants was 95.2 n Gy / h (65.5 n Gy / h ~ 133.6 n Gy / h) over the past decade. The average annual ambient gamma radiation level was 94.8 n Gy / h (69.0 n Gy / h to 122.8 n Gy / h). Conclusions The gamma radiation level in the periphery of Tianwan NPP in the recent ten years is within the background range, and there is no significant difference with the background before the operation of the hydropower station. The annual absorbed dose caused by environmental gamma radiation is not greater than 0.96m Sv.