[en] The ESNII Plus project: 'Preparing ESNII for Horizon 2020' (2013-2017), is a combination of Collaborative Project and a Coordination and Support Action performed in the 7. European Framework Program. This project merges the contribution of 35 European partners. This crosscutting project is devoted to develop a broad strategic approach for advanced fission systems in Europe in support of the European Sustainable Industrial Initiative (ESNII) as well as perform Research/Development activities on technical issues in support to the development of ESNII fast reactors ASTRID, ALLEGRO, ALFRED and MYRRHA. This paper summarizes the work done in the different areas of the project: -) structuring ESNII for HORIZON 2020, -) strategic road-mapping, -) support to facilities development, -) industrial perspectives, -) training and dissemination, -) core safety, -) fuel safety, -) seismic studies, and -) instrumentation for safety