Abstract
The aimed of the work was estimated the value (level) of mean annual 222Rn activity concentration in an underground space based on monthly (k1m) and quarterly (k3m) correction factors. The calculations of factors were developed with the assumption that measurements will be conducted for at least 1month or a quarter of a year. Radon monitoring to confirm the calculated values was carried out continuously from 2008 to 2019 and verification was made on real data obtained in 2020. The estimated mean annual 222Rn activity concentration for spaces with natural air exchange depends on factors k1m and for mechanically ventilated spaces-k3m. The k1m for the first group varies from 1.2 to 3.3 between January and March, and between October and December. In the remaining months, k1m assumes the values from 0.6 to 0.8. In spaces where natural air exchange with the atmosphere is not impeded by airlocks, the k1m takes the values of 1.0-1.5 (I-III and X-XII), 0.7-0.8 (V-IX), and 1.0 (IV). For spaces with mechanical ventilation, the k3m is characterized by values in the range of 1.3-1.4 (I and IV quarter), and 0.9 in the others. In spaces with an unknown ventilation method or when the methods are mixed, the averages for both groups of correction factors can be used: k1m in the range of ≥ 1.0-1.6 (I-III and IX-XII) and < 1.0-0.7 (IV-XI), and k3m-in the range of 1.3-1.4 (I and IV quarter) and 0.9 in the others.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.