The EU-RADION project will provide an innovative solution to deal with selected shortcomings in CBRNe protection indicated in the ENCIRCLE Catalogue. The project will provide an operational radiological threat detection and identification system comprising several technological components. The components encompass radiological threat dispersion modelling and analysis tools, test sensor platforms including swarm of mini UGVs, tactical command tool, network controller and sensor integration unit. The sensor integration unit (SIU) will be a novel detector, which includes several radiological threat sensing devices supported by hydrogen sensor and positioning module. The SIU will be adaptable to several platforms (including stationary, handheld and UGV mounted units) and capable of operating in both indoors and outdoors environments. Furthermore, the system will feature a computational tool allowing for estimating the dispersion of RN material and its potential source. Moreover, the Tactical Command tool (TC) will be the highest layer of the system responsible for providing a user interface to the system and integrating data acquired from measurement and computational components. This component will cooperate directly with the network controller (NC) in order acquire data from radiological sensors. EU-RADION also assumes the implementation of UGV swarm concept for radiological threat detection and evaluation of its performance in CBRNe domain. EU-RADION will be based on system-of-systems approach. All of the developed components will be designed as fully operational and independent modules. This will enhance the system interoperability and facilitate potential integration with other existing systems. The final system will be demonstrated in realistic environment (training tunnel).