GENESIS is a instrumental platform for characterization of materials with very fine scale. Its main objective is to develop the experimental analysis at the atomic scale materials electro-nuclear facilities. These studiews aim to lift technological obstacles in the analysis of degradation due to neutron irradiation of materials. The results will help to better understand the phenomena at the atomic scale and improve modeling and simulation component aging nuclear systems. The observations at the nanoscale will make possible real progress in understanding phenomena at the origin of the degration of materials.