Needs of nuclear data of structural materials for fast reactors

Structural material nuclear data play an important part for the fast power reactors at different levels: - cell neutron balance (critical enrichment and breeding ratio), - shielding propagation, - γ heating (in the core: absorber rods; in the blanket and in the shielding), - activation and corrosion estimations. According to these different problems the following data are to be taken into account: capture, inelastic total, (n,α) and (n,p) cross sections in various energy ranges. The aim of the present paper is to give the needs for these four problems and to give the present situation in each field mentionned