A new article was published by colleagues from the National Institute for Nuclear, Chemical and Biological Protection in the Czech Republic, working in WP5 (Mitigation) of RadoNorm.

Given the considerable variability of environmental and working conditions at different workplaces, obtaining site-specific aerosol data to support more accurate and tailored dose coefficient calculations is beneficial. The key parameters influencing effective dose include the equilibrium equivalent activity concentration (EEAC), total aerosol concentration, and the size distribution of radioactive aerosol particles. In their paper titled Determination of the radon progeny activity size distribution at different types of workplaces in the Journal of Environmental Radioactivity, the authors presents field measurements of the activity size distribution of short-lived radon progeny at several workplaces, using the Dekati ELPI + cascade impactor and the Graded Screen Array Diffusion Battery (GSA DB). The measurements were conducted primarily at underground workplaces with natural ventilation, including former mining excavations and tourist caves. For comparison, the study also includes one site with forced ventilation—a facility for disposing of low-level radioactive waste—and one outdoor location influenced by radon exhalation from a uranium mining waste rock dump. Other key parameters influencing effective dose, such as the equilibrium factor (F) and unattached fraction (fp), were measured.

This and more publications can be found on the RadoNorm website.