Speaker
Description
In the framework of the RadoNorm WP 5.4 project, an international comparison of radon activity concentration, equilibrium equivalent activity concentration total and unattached fraction was held at the Historic Silver mine in the city of Tarnowskie Góry in Poland from 20th to 23rd of February, 2024.
Comparison measurement of continuous monitors in laboratory conditions in mixed fields of radon and thoron was carried out in SURO’s radon chamber during spring 2023 and which will be presented by Karel Jilek and colleagues. During the evaluation period, laboratory conditions were kept stable and homogeneity of activity was ensured. In contrast to that, at workplaces (underground workplaces which are the subject of detailed studies of the WP5.4 are not exceptions), measurement conditions and radon/radon progeny concentration may appear to be on the far edges of operating ranges. The conditions during exposure vary, and these variations can significantly impact the response of the detectors. Multiple parameters are subject to change, each potentially influencing the detector response in a different manner. As a result, these effects can either amplify or negate each other.
The main goal of this comparison measurement was to compare the results of currently mostly used continuous monitors for radon activity concentration measurement and radon progeny measurement in the real conditions of an underground workplace.