This study considers the main tasks of comprehensive radiological monitoring in the areas of NPP location. It is shown that in order to transform an informational monitoring system into a management system, i. e. to expand its functionality it is necessary to incorporate an analytical expert subsystem in it to assess impact of a nuclear power plant on the environment (EkoIES), which is designed to collect, preserve, organize, analyze, share and map the data of comprehensive radiological monitoring / control in the monitoring areas of nuclear power plants. This would provide due support in making decisions concerning the safety of the environment in the area of an NPP impact. A version of a concept of EkoIES creation is presented, taking into account both Ukrainian and European standards on informatization of monitoring of the potentially hazardous objects Keywords: Radiological monitoring, nuclear power plant, information expert system, environmental safety