Reference device for calibration of radon exhalation rate measuring instruments and its performance

Wei-Gang Li; De-Tao Xiao; Zheng-Zhong He; Xiang-Yuan Deng; Shou-Kang Qiu

doi:10.1007/s41365-023-01275-3

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Reference device for calibration of radon exhalation rate measuring instruments and its performance

NUCLEAR ELECTRONICS AND INSTRUMENTATION | Updated：2023-09-19

- Reference device for calibration of radon exhalation rate measuring instruments and its performance
- Reference device for calibration of radon exhalation rate measuring instruments and its performance
- 核技术（英文版） 2023年34卷第8期文章编号：128
- Affiliations：
  
  1.School of Nuclear Science and Technology, Hunan provincial key laboratory of radon, University of South China, Hengyang 421001, China
- Author bio：
  
  * xiaodt@usc.edu.cn
- Funds：
  
  National Natural Science Foundation of China(11875165)
- DOI：10.1007/s41365-023-01275-3
  中图分类号：
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Reference device for calibration of radon exhalation rate measuring instruments and its performance[J]. 核技术（英文版）, 2023,34(8):128

Wei-Gang Li, De-Tao Xiao, Zheng-Zhong He, et al. Reference device for calibration of radon exhalation rate measuring instruments and its performance[J]. Nuclear Science and Techniques, 2023,34(8):128
Reference device for calibration of radon exhalation rate measuring instruments and its performance[J]. 核技术（英文版）, 2023,34(8):128 DOI： 10.1007/s41365-023-01275-3.

Wei-Gang Li, De-Tao Xiao, Zheng-Zhong He, et al. Reference device for calibration of radon exhalation rate measuring instruments and its performance[J]. Nuclear Science and Techniques, 2023,34(8):128 DOI： 10.1007/s41365-023-01275-3.

摘要

Abstract

Environmental radon emanates from the exhalation and release of soil, rocks, and building materials. Environmental radon contamination tracing and radon pollution prevention and control require the measurement of the radon exhalation rate on media surfaces. Reliable measurements of the radon exhalation rate cannot be achieved without regular calibration of the measuring instrument with a high-performance reference device. In this study, a reference device for the calibration of radon exhalation rate measuring instruments was developed using a diffusion solid radon source with a high and stable radon emanation coefficient, an integrated diffusion component composed of a plasterboard and a high-density wooden board, an air pressure balance device, a radon accumulation chamber, and a support structure. The uniformity and stability of the reference device were evaluated using the activated carbon-γ spectrum and open-loop method, respectively, to measure the radon exhalation rate. The reference device achieved different radon exhalation rates by using different activities of diffusion solid radon sources. Nineteen measurement points were regularly selected on the radon exhalation surface of the reference device, and the uniformity of the radon exhalation rate exceeded 5%. The short-term stability of the reference device was better than 5% under different environmental conditions and was almost unaffected by the ambient air pressure, environmental temperature, and relative humidity.

关键词

Keywords

Radon exhalation rateStabilityUniformityHigh-density wooden boardPlasterboard

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