利用铀矿废石为氡源对测氡仪校准的实验研究  

Experimental Study on Calibration of Radon Detector Using Uranium Mine Waste Rock

作　　者：田兴宇 张雄杰[2] 李文一[1] 冯洋洋 黄仁桂 TIAN Xingyu;ZHANG Xiongjie;LI Wenyi;FENG Yangyang;HUANG Rengui(The First Monitoring and Application Center,Tianjin 300180,China;Engineering Research Center of the Ministry of Education for the Application of Nuclear Technology,Nanchang 330029,China;Earthquake Administration of Jiangxi,Nanchang 330039,China)

机构地区：[1]中国地震局第一监测中心,天津300180 [2]核技术应用教育部工程研究中心,南昌330029 [3]江西省地震局,南昌330039

出　　处：《同位素》2023年第3期313-319,共7页Journal of Isotopes

基　　金：中国地震局第一监测中心科技创新主任基金(FMC2022004);中国地震局地震科技星火计划(XH22017YA);核技术应用教育部工程中心开放基金(HJSJYB2021-6)联合资助项目。

摘　　要：测氡仪须定期进行校准,常用的有固体氡源校准方法和氡室校准方法。前者存在氡源装置老化、操作复杂和放射性物质易受运输管控等问题;后者存在校准用时长,无法实现现场校准等问题。为实现地震测氡仪现场校准,本研究提出一种利用铀矿废石进行测氡仪校准的实验方法。结果表明,该方法的氡浓度控制具有较高的准确性与稳定性,输出气体氡浓度与预设目标之间相对误差为1%;铀矿废石校准实验与标准氡室校准实验的结果对比显示,两者校准因子一致性较好,相对误差为1.14%,归一化误差E n为0.1356,在预期范围内。以上结果可为后续便携式测氡仪校准装置的研制提供参考。Usually,radon detector must be calibrated every year,commonly used solid radon source calibration method and radon chamber calibration method.The former has the problems of radon source device aging,complex operation and radioactive substances vulnerable to transport control.The latter has problems such as calibration time principal and inability to achieve on-site calibration.Based on the above facts,this paper proposes an experimental method for the calibration of radon measuring instrument using uranium waste rock,which is used to realize the field calibration of seismic radon measuring instrument.The results show that the radon concentration control method has high accuracy and stability,and the relative error between the output gas radon concentration and the preset target is 1%.The comparison between the calibration experiment of uranium mine waste rock and the calibration experiment of standard radon chamber shows that the calibration values of the calibration coefficient of the two are in good agreement,the relative error is only 1.14%,and the normalized error En is only 0.1356,which is within the expected range.It can provide theoretical support for the subsequent development of portable radon detector calibration device.

关 键 词：氡 测氡仪 铀矿废石 仪器校准 

分 类 号：TL84[核科学技术—核技术及应用]