宁德核电厂周围环境空气中14C的监测与评价

摘要/Abstract

摘要： 开展环境空气中¹⁴C的监测是核电厂辐射环境监督性监测的重要内容。本文给出了宁德核电厂周围环境空气中¹⁴C的取样与监测方法,分析了2013—2021年间监测结果变化及趋势,对比分析了运行前辐射本底调查结果、对照点监测结果及国内外其他核电厂的监测结果,并与宁德核电厂气态流出物排放量进行了相关性研究。分析表明,核电厂周围各监测点位空气中¹⁴C的比活度均值范围为0.229~0.230 Bq/g(碳),其中距离厂址最近的牛郎岗监测点的结果可能受到核电厂排放的影响。分析了¹⁴C比活度的年周期变化规律,结果表明,除牛郎岗监测点外,¹⁴C的比活度一般在7—9月相对较高。

关键词: 宁德核电厂, 辐射环境监测, ¹⁴C, 空气中放射性

Abstract: The monitoring of atmospheric ¹⁴C around nuclear power plant is an important content of the supervisory monitoring of radiation environment. In this paper, the sampling and monitoring methods of ¹⁴C in the ambient air around Ningde NPP were presented. The variations and trends of the monitoring results from 2013 to 2021 were analyzed, and were comparatively studied with the baseline and other reported values around NPPs. Meanwhile, the correlation study with the gaseous effluent emission from Ningde NPP were analyzed. It was shown that the average specific activity of atmospheric ¹⁴C at each monitoring point of Ningde NPP ranges from 0.229 to 0.230 Bq/g(C), and the results of the Niulanggang monitoring point closest to the plant site may be affected by the discharge of the NPP. Furthermore, the seasonal variation of ¹⁴C specific activity was analyzed. It was shown that, except for the Niulanggang monitoring point, the specific activity of ¹⁴C was higher during July to September.

Key words: Ningde Nuclear Power Plant, environmental radiation monitoring, ¹⁴C, radioactivity in atmosphere

中图分类号:

TL75+1

林明贵. 宁德核电厂周围环境空气中¹⁴C的监测与评价[J]. 辐射防护, 2022, 42(5): 418-424.

LIN Minggui. The monitoring and assessment of atmospheric ¹⁴C specific activities around Ningde NPP[J]. RADIATION PROTECTION, 2022, 42(5): 418-424.

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宁德核电厂周围环境空气中¹⁴C的监测与评价

The monitoring and assessment of atmospheric ¹⁴C specific activities around Ningde NPP

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