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驻极体收集积分测氡法,利用驻极体产生的静电场收集~(218)Po~+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~(-2)Bq~(-1)m~3h~(-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。
Electret collected integral radon method, the use of electret generated electrostatic field collected ~ (218) Po ~ + positive ion, which greatly improves the sensitivity of the measured radon. The radon measured by electret method has a response factor of 4.70cm ~ (-2) Bq ~ (-1) m ~ 3h ~ 1, which is about one thousand times larger than the conventional passive sampling method. The measuring devices and methods are also described, and the application of this method at Qinshan Nuclear Power Station, Hunan Provincial Environmental Monitoring Center Station and some uranium mines and the quality assurance system are also introduced. The analysis shows that the key factor of the radon concentration in Qinshan NPP is the sea-land breeze. When the wind blows from the land, the radon concentration is high and low when it blows from the sea. The ratio of the two is about 2.