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| Determination threshold and detection limits of Radon and its daughter by solid track method |
| CAO Lei1, DENG Jun2, WU Peng3, WANG Xiaotao3, WANG Hongsheng1, GUO Zeqin1 |
1. Beijing Institute of Occupational Medicine for Chemical Industry, Beijing 100093 China;
2. National Institute for Radiological Protection, China CDC;
3. Nuclear and Radiation Safety Center |
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Abstract Objective The bottleneck technique of measuring Radon and its daughter by solid track technique was studied, and the influence of background Radon on individual monitoring reliability and effective control methods were discussed.Methods According to the law of statistics, referring to the relevant literature, combined with the dosimetry analysis, the judgment threshold and detection lower limit by the solid track technology for Radon and its daughters were deduced, and the radiation dose was estimated.Results By using the method of application examples, the judgment threshold and detection lower limit of specific examples were given.Conclusion The probability of β error is not only related to the judgment threshold LC, but also to the net track count. The larger the value of net track meter is, the smaller the probability of β error is. The minimum detectable track count can be given, and the minimum detectable Radon concentration can be estimated, which improves the reliability of radon individual dose monitoring.
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Received: 09 December 2019
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