ABSTRACT
The main workplaces where worker’s exposure to radon may be considered as occupational exposures are mines (independent of the mined substance), other underground workplaces such as caves and galleries (which accumulates high radon concentration), spas (using radon in care process or just the exposure through water usage), desalinization of underground brines and operations involving naturally occurring radioactive substances (NORM in the extraction of gas and oil, phosphate industry, etc.) (Nikolov et al., 2014). Thermal establishments, in particular, were identified by the European Union as one of the professional activities with higher exposure to radon.
