Shielding for future fusion reactors

This paper outlines the main principles of shield design criteria for the future fusion reactors with an emphasis on the main parameters for shield optimization. The nuclear performance of the blanket and the inboard, outboard and penetration shields and their significant impact on the performance, operating conditions and cost of the fusion reactors are also discussed. In addition, the measured and calculated data of 14 MeV neutron fluxes and energy distributions in materials widely used for shield construction of fusion reactors are given and discussed. (orig.)