DEVELOPMENT OF CALIBRATION FACILITY FOR RADON AND ITS PROGENIES AT NIM (CHINA)
DEVELOPMENT OF CALIBRATION FACILITY FOR RADON AND ITS PROGENIES AT NIM (CHINA)
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DOI：
10.1093/rpd/ncv222
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发表时间：
2015-11-01
影响因子：
1
通讯作者：
Guo, Q. J.
中科院分区：
文献类型：
--
作者：
Liang, J. C.;Zheng, P. H.;Guo, Q. J.
氡及其子体的准确测量是控制氡剂量、降低肺癌发病风险的基础。测量仪器的精密校准是氡及其子体浓度测量质量控制的重要组成部分。为建立我国氡及其子体测量仪器的国家标准，实现氡及其子体测量仪器的可靠标定，中国计量科学研究院设计并建造了一个具有环境参数、气溶胶和氡浓度可调功能的氡室。该室的总体积约为20 m3，其中暴露体积为12.44 m3。氡浓度可控制在12 Bq m（-3）~ 232 kBq m（-3）之间。温度调节范围为0.66 ~ 44.39 ℃，相对湿度调节范围为16.4 ~ 95%RH，气溶胶调节范围为10（2）~ 10（6）cm（-3）。本文介绍了中国计量科学研究院氡室的主要优点，即通过对氡和气溶胶的自动调控，使氡子体浓度和平衡因子在较宽范围内保持稳定。
Accurate measurement of radon and its progenies is the basis to control the radon dose and reduce the risk of lung cancer caused. The precise calibration of measuring instrument is an important part of the quality control of measurements of the concentration of radon and radon progenies. To establish Chinese national standards and realise reliable calibrations of measuring instrument for radon and its progenies, a radon chamber with regulation capability of environmental parameters, aerosol and radon concentrations was designed and constructed at National Institute of Metrology (NIM). The chamber has a total volume of similar to 20 m(3) including an exposure volume of 12.44 m(3). The radon concentration can be controlled from 12 Bq m(-3) to the maximum of 232 kBq m(-3). The regulation range of temperature, relative humidity and aerosol are 0.66 -44.39 degrees C, 16.4 -95 % RH and 10(2) -10(6) cm(-3), respectively. The main advantages of the NIM radon chamber with respect to maintaining a stable concentration and equilibrium factor of radon progenies in a wide range through automatic regulation and control of radon and aerosol are described.