摘要
本文介绍了环境空气吸收剂量率连续监测的概念和福建省监测的总体情况,进行了环境空气吸收剂量率波动分析,发现自福建省辐射环境监督各站点运行以来,环境空气吸收剂量率水平测值均在天然本底正常波动范围内。监测数据表明,γ剂量率水平波动受降雨影响最大,可翻倍涨幅;次之是地表积水,可使明显下降;一般晴天天气下,土壤中水分、潮汐和大气中氡子体浓度等因素影响有限,不超过20nGy/h。
This paper first introduces the concept of continuous monitoring of the absorbed dose rate of ambient air and the overall situation of monitoring in Fujian Province. Secondly, the fluctuation analysis of the absorbed dose rate of ambient air is carried out. It is found that the measured values of the absorbed dose rate of ambient air are within the normal fluctuation range of the natural background since the operation of various stations of the radiation environmental monitoring in Fujian Province. The monitoring data show that the fluctuation of gamma dose rate level is most affected by rainfall, and can double the increase range;secondly, surface water can make a significant decline;generally in sunny weather, the influence of water, tide and radon daughters concentration in the atmosphere is limited,not exceeding 20 nGy/h.
关键词
辐射监测自动站
空气吸收剂量率
天然本底
波动
automatic radiation monitoring station
air absorption dose rate
natural background
fluctuation
