ENSAR is the Integrating Activity of Nuclear Scientists from almost all European countries performing research in three of the major subfields of Nuclear Physics: Nuclear Structure, Nuclear Astrophysics and Applications of Nuclear Science. It proposes an optimised ensemble of Networking (NAs), Transnational Access and Joint Research Activities (JRAs), which will ensure qualitative and quantitative improvement of the access provided by the current seven infrastructures, which are at the core of this proposal. The novel and innovative developments that will be achieved by the RTD activities will also assure state-of-the-art technology needed for the new large-scale projects.Our community of nuclear scientists profits from the diverse range of world-class research infrastructures in Europe that can supply different ion beams and energies. We have made great efforts to make the most efficient use of these facilities by developing the most advanced and novel equipment needed to pursue their excellent scientific programmes and applying state-of-the-art developments in nuclear instrumentation to other research fields and to benefit humanity (e.g. archaeology, medical imaging). Together with multidisciplinary and application-oriented research at the facilities these activities ensure a high-level socioeconomic impact.To enhance the access to these facilities, the community has defined a number of JRAs, using as main criterion scientific and technical promise. These activities deal with novel and innovative technologies to improve the operation of the facilities. In addition, a key JRA aims at integrating the laboratories in Central and South-Eastern European countries with those elsewhere in Europe.The NAs of ENSAR have been set-up with specific actions to strengthen the communities’ coherence around certain research topics and to ensure a broad dissemination of results and stimulate multidisciplinary and application-oriented research at the Research Infrastructures.