Uncertainty evaluation of calibration radon chamber

Shumin Zhou; Bin Tang

doi:10.1117/12.806623

13 October 2008 Uncertainty evaluation of calibration radon chamber

Shumin Zhou, Bin Tang

Proceedings Volume 7128, Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment; 712810 (2008) https://doi.org/10.1117/12.806623
Event: Seventh International Symposium on Instrumentation and Control Technology, 2008, Beijing, China

Abstract

The uncertainty evaluation of calibration instrument is an important step to evaluate the performance of instrument. The radon chamber is a standard instrument used to calibrate the radon monitors. Because the radioactivity decay and statistical fluctuation of radioactivity measurement, the uncertainty evaluation of radioactivity measurement instrument is different from the general instrument, the uncertainty evaluation of radon chamber should trace to the national reference radium source. In this paper, the two different uncertainty evaluation model of radon concentration based the radon source and radon monitor is described. The uncertainty of different input variables include radon concentration, radioactivity statistical fluctuation, the temperature and humidity is evaluated in evaluation standard Type A or Type B. According to the contribution of different factor to the uncertainty of radon concentration, the expanded and relativity expanded uncertainty of radon chamber is calculated and discussed in detail. Through comparison, the uncertainty evaluation of radon concentration based on radon monitor is better than the model based on radon source.

Citation Download Citation

Shumin Zhou and Bin Tang "Uncertainty evaluation of calibration radon chamber", Proc. SPIE 7128, Seventh International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment, 712810 (13 October 2008); https://doi.org/10.1117/12.806623

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