【摘要】 驻极体收集积分测氡法,利用驻极体产生的静电场收集²¹⁸Po⁺正离子,极大地提高了测氡灵敏度。采用驻极体法测氡,响应因子比常规被动采样法的大千倍左右,达4.70cm^-2Bq^-1m³h^-1。还对测量装置和方法进行了描述,介绍了该方法在秦山核电站、湖南省环境监测中心站和一些铀矿山应用的情况及质量保证体系。分析结果表明,秦山核电站的氡浓度变化关键因素是海陆风,当风从陆地吹来时氡浓度较高,从海上吹来时则较低,两者的比值约为2。更多还原

【Abstract】 The integrating radon monitoring technique with electret collecting is a method which collects the 218Po+ positive ions by electrostatic field produced by electret. It has greatly improved the sensitivity of radon measurement. The response factor of this method reaches to 4. 7 cm-2Bq-1m3h-1,1000 times larger than that of common passive sampling method. The monitoring device and its principle are introduced in this article. The measuring results of radon concentration and radon flux rate and quality assurance system by using this method in the Qinshan Nuclear Power plant, Hunan Environmental Monitoring Central Station and some uranium mines are also presented. The analytical results show that the radon concentration in the Qinshan Nuclear Power plant is affected by wind direction. When wind directs toward sea, the radon concentration is high. If the wind is to the contrary,it is low. The radon concentration ratio of both is about 2.更多还原