Considerations referring to materials types able to be used in gas-cooled fast reactors

The demand for standard of living and population growth, in developing countries are asking for a considerable increase of energy supply. Nuclear energy is one way to provide it. In this context, an integrated R&D program was initiated: Generation IV reactors Program. Taking in account the operation conditions of these reactors types, it was necessary to find some materials with special characteristics. For exemplification, in this paper are presented aspects regarding the study and selecting modality of some adequate materials for Gas-Cooled Fast Reactor- GFR.