氡浓度对气溶胶监测仪判断限的影响及分析

Discussion on the influence of radon concentration on the decision threshold of aerosol monitors

环境中氡浓度水平对气溶胶监测仪的判断限会有所影响,本文以中国辐射防护研究院氡及子体发生系统为基础,通过改造并分别搭载国内外六台气溶胶监测仪对其进行了探究。根据实验数据给出了按照气溶胶监测仪的监测模式选用氡浓度与其判断限的相关关系建议:单次测量模式和固定式累积测量模式的气溶胶监测仪判断限与氡浓度存在线性关系,移动式累积测量模式的气溶胶监测仪判断限与氡浓度平方根为幂函数拟合关系。

The radon concentration in the environment will affect the decision threshold of aerosol monitors.Based on the radon and its daughters generation system of China Institute for Radiation Protection(CIRP),a set of stable circuits with adjustable internal radon concentration were established,and six domestic and overseas aerosol monitors were tested,in order to explore the effect of different environmental radon concentrations on the decision threshold of the aerosol monitors.Based on large number of experiments and data,it is recommended to select the correlation between the radon concentration and decision threshold of the aerosol monitor according to the monitoring mode of the aerosol monitor.When single measurement mode or fixed cumulative measurement mode is adopted,there is a linear relationship between its decision threshold and radon concentration.When mobile cumulative measurement mode is adopted,a power function relationship between its decision threshold and radon concentration is recommended.