The ALLIANCE project focuses on the preparatory phase for developing the ALLEGRO demonstrator. This is based on the Gas Fast Reactor (GFR) concept, one of the 2 alternative systems under the SET-Plan’s European Sustainable Nuclear Industrial Initiative (ESNII), expected to be built in Central Europe. ALLIANCE covers a number of preliminary studies on fuel management, R&D roadmap & infrastructures needs, and siting, as well as the licensing roadmap, preliminary design and safety analysis. ALLIANCE will integrate experience and knowledge gained from the past or ongoing related initiatives.Arguments on why GFR technology could be accepted in Europe as a complementary option of SFR will be clearly stated. Furthermore map and highlight of national or regional initiatives supporting the development of this technology and list of countries interested in the hosting of the ALLEGRO demonstrator on its territory. The conditions for the site selection should be defined within this project.In addition the project specification on licensing and construction period will be suggested. For the R&D activities as well as for the operational and decommissioning phases specifications should be elaborated. These specifications would cover the licensing roadmap, financing and project organisation setup.According to the latest concept, a common Centre of Excellence will be created in Central Europe for GFR studies. The creation of the Centre will be the first step towards integration of fuel and reactor safety research in the region.