Requirements and selection criteria for plasma-facing materials and components in the ITER EDA design

The goal of the International Thermonuclear Experimental Reactor (ITER) is to demonstrate the scientific and technological feasibility of fusion energy for peaceful purposes. The Engineering Design Activities (EDA) are developing the design of this next step experiment in controlled fusion energy research. Severe demands are placed on performance of materials, especially of those in contact with the plasma. The present status of the design is summarized, with emphasis on the vacuum vessel and the in-vessel components. The requirements to be met by plasma-facing materials and components are highlighted, and the research and development needs are described. (author). 12 refs, 4 figs