Some issues in the implementation of the current system of protection

, to adapt to science evolution and changes in society, taking also into account the experience from the application of the system. In this sense, some difficulties arise in the implementation of the current ICRP recommendations, both for regulators and for operators. It is important that these difficulties be identified in order to be analysed for the need for further clarification or guidance in the framework of the future general revision. The objective of this article is to present some issues from the experience of the implementation of the current system of protection in some existing exposure situations (EES), such as radon, naturally occurring radioactive material (NORM), and trade of commodities. The main issues identified deal with cases where exposure situations are difficult to classify; the categorisation of occupational exposure and application of a graded approach in EES; the implementation of reference levels from the point of view of regulators; and the implementation of protection strategies in line with sustainability principles and safety requirements, addressing safety and an overall well-being. Finally, from a practical point of view, the need for simplification of the system of protection is necessary, where possible.