驻极体法在建筑材料氡析出率测量中的应用研究  

An applied research of electret method in the measurement of Radon exhalation rate of buiding materials

作　　者：张庆召[1] 武云云[1] 宋延超[1] 崔宏星[1] 尚兵[1] 侯长松[1] ZHANG Qing-zhao;WU Yun-yun;SONG Yan-chao(Key Laboratory of Radiological Protection and Nuclear Emergency,China CDC,National Institute for Radiological Protection,Chinese Center for Disease Control and Prevention,Beijing 100088,China;不详)

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所,辐射防护与核应急中国疾病预防控制中心重点实验室,北京100088

出　　处：《中国医学装备》2021年第2期29-32,共4页China Medical Equipment

摘　　要：目的:研究使用驻极体氡探测器测量建材氡222(^(222)Rn)析出的方法。方法:设计、制作建筑材料^(222)Rn析出测量专用密封箱,将驻极体氡探测器与建材样品放入箱中并密封,分不同时间段做累积测量,并于密封箱外部串联一台氡连续测量仪,与驻极体同时测量密封箱内^(222)Rn浓度。通过测量计算密封箱内累积氡浓度,分析比较驻极体法与连续测量法测量^(222)Rn析出率结果的差异及影响因素。结果:驻极体在各累积时间段的测量结果与连续测量方法测量结果比较,其相对百分偏差范围为9.24%~28.8%,且驻极体法24 h的测量结果与连续测量方法百分偏差最小,相对百分偏差为9.24%。结论:驻极体法可以用于建筑材料^(222)Rn析出的测量,且在短周期现场测量方面驻极体氡探测器具有布放方便,测量简便的优势。Objective:To study the method of measuring Radon exhalation from building materials by electret Radon detector.Methods:A special sealed box for the measurement of Radon exhalation of building materials was designed and manufactured.The electret Radon detector and the samples of building materials were put into the box and were sealed.The accumulated measurement was conducted in different time quantum.And a Radon continuous detector was connected with the exterior of sealed box by series connection,and it was used to measure the Radon concentration inside of sealed box at the same time.The difference and influence factor of measured result of Radon exhalation rate between electret method and continuous measurement method were analyzed and compared through measured and calculated the accumulated Radon concentration inside of the sealed box.Results:The relative percentage deviation between the results of electret measurement of each accumulated time quantum and the results of continuous measurement was from 9.24%to 28.8%.The percentage deviation between the measured results of electret method within 24 hours and that of continuous method was the smallest,and the relative percentage deviation was 9.24%.Conclusion:Electret method can be used to measure Radon exhalation of building materials,and it has the advantages of convenient arrangement and simple measurement in field measurement with short period.

关 键 词：氡(^(222)Rn)析出 建筑材料 驻极体 测量 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]