固体核径迹测氡风速影响的研究

Study on influence of wind on state solid nuclear track detector for measuring radon

固体核径迹方法具有探测限低及受环境影响较小等优点,在矿工职业卫生评价与环境氡水平调查中已广泛应用,然而当测量环境风速较大时,该方法是否还能满足要求是一个值得关注的问题。本文利用伯努利定律就风速对密闭式固体核径迹测氡方法响应的影响进行了理论分析,并在南华大学氡实验室对核工业北京化工冶金研究院生产的KF-606B固体核径迹累积氡探测器(密闭式)进行了风速影响的实验研究。理论和实验结果均表明,通常情况下风速不是密闭式固体核径迹测氡的主要影响因素,该方法可满足环境风速较大时的测量要求。

The state solid nuclear track detector（SSNTD） used for measuring radon has been widely applied in assessment of the miners＇ occupational health and survey of radon in environment because of its low detect limit and small influence of environment. But there has been a concern that if the method can meet the requirements of the measurement when there is a strong wind. This paper theoretically analysis the influence of wind in the measurement of dosed SSNTD by using the Bernoulli law, and related experiment also was done at radon labo- ratory of the University of South China by using KF -606B SSNTD （dosed）which is the product of Beijing Re- search Institute of chemical engineering and metallurgy. Theoretical and experimental results show that wind is not main factor in measuring aecurnulated radon with dosed SSNTD usually, dosed SSNTD can be used whenthere is a strong wind.