氡计量标准器量值传递技术研究与应用  

Study and Application of Radon Value Transmission Technology Based on Standard Instruments

作　　者：樊春燕[1] 高小其 王小娟 穆慧敏[4] 姚玉霞 张旭燕 FAN Chun-yan;GAO Xiao-qi;WANG Xiao-juan;MU Hui-min;YAO Yu-xia;ZHANG Xu-yan(China Earthquake Networks Center,Beijing 100045,China;National Institute of Natural Hazards,Beijing 100085,China;Gansu Earthquake Agency,Lanzhou 730013,China;ShanxiEarthquakeAgency,Taiyuan 030021,China)

机构地区：[1]中国地震台网中心,北京100045 [2]应急管理部国家自然灾害防治研究院,北京100085 [3]甘肃省地震局,甘肃兰州730013 [4]山西省地震局,山西太原030021

出　　处：《地震》2024年第3期73-85,共13页Earthquake

基　　金：地震科技星火计划项目(XH22010C)。

摘　　要：AlphaGUARD测氡仪被广泛用作氡标准仪器开展量值传递。本文通过标准氡室以及循环氡源验证AlphaGUARD测氡仪在低量程的准确性、高量程的一致性,并建立一定浓度范围(0.6~142.4 Bq·L^(-1))内的量值传递线性关系。为保证量值传递的可靠性,基于溯源到参考标准的氡标准仪器,将量值传递到循环氡源,分别开展以循环氡源以及标准仪器和一定浓度的水样(>5 Bq·L^(-1))作为参考标准的量值传递实验。本研究针对地下流体氡观测网内近年应用的4种新型测氡仪,制定应用氡标准仪器进行量值传递的7种技术方案,并在全国40多个氡观测站应用,其中有12个连续观测站应用2年,结果表明,校准系数相对偏差均小于5%,氡量值传递技术方案是可行的,可满足现有氡观测的校准需求。此外,还开展了传递方案的不确定度评价实验,以DDL型测氡仪为例,其最小不确定度可达5.5%(包含因子k=2)。本研究建立的新型测氡仪氡计量标准器量值传递技术方案,该方案科学可行,应用方案可有效保证新型测氡仪测值的稳定可靠。The AlphaGUARD radon meter is generally widely used as a radon standard instrument for value transfer.This article studied the accuracy of the AlphaGUARD radon meter in low range and consistency in high range,and established a linear relationship for value transfer within the range of 0.6~142.4 Bq·L^(-1).Based on tracing to reference standards,radon standard instruments are used to transfer values to circulating radon sources.Quantity transfer experiments based on circulating radon sources,as well as quantity transfer experiments based on standard instruments and certain concentration water samples(greater than 5 Bq·L^(-1)),are conducted separately.Seven technical schemes for transmitting measurement values using radon standard instruments have been developed for four new types of radon meters used in the underground fluid network in recent years,and have been applied in more than 40 radon observation stations nationwide.The continuous application of 12 observation stations for 2 years has shown that the radon value transmission technology scheme is scientifically feasible.Among the 12 radon observation stations,the relative deviation coefficients was less than 5%.This technology scheme can meet the calibration needs of existing radon observations.In addition,uncertainty evaluation experiments were conducted on the transmission scheme.Taking the DDL radon meter as an example,its minimum uncertainty can reach 5.5%(coverage factor k=2).The radon measurement value trans mission technology established in this study is scientifically feasible,and the application plan can effectively ensure the stability and reliability of the new radon measurement instrument.

关 键 词：氡 标准仪器 计量 传递技术 

分 类 号：P315.7[天文地球—地震学]