The European Council Directive 2013/59/Euratom of December 2013 established inter alia the uniform basic safety standards for the health protection of individuals being subject to occupational exposure. In Article 54, a new obligation is introduced-to regulate radon exposure in workplaces. The EU Member States are obliged to set national reference value for radon in workplaces, delineate the areas where the regulation will be applied and determine the concerned types of workplaces. The presented article shows the Czech approach to implementation of this obligation in national legislation and the first design of regulator's control activities to set the obligation in practice.

The Czech approach to limit the occupational exposures to natural radiation is based on the rules given by the Atomic Act and by the Decree of the State Office for Nuclear Safety (SONS) on radiation protection. Workplaces with potential risk of increased exposure to natural sources are specified explicitly. A new method to perform the above-mentioned measurements and to determine the effective doses of workers was proposed in 2005 and accepted by the SONS in 2007. The first experience illustrates its applicability.