Nuclear performance of the D–D phase of ITER

Deuterium plasma will be used during the early phase of the International Thermonuclear Experimental Reactor (ITER) operation. For a typical reduced cost ITER the D–D-neutron yield ∼3.5×1018 n s−1 will be accompanied by a considerable tritium production and a D–T (14.1-MeV)-neutron yield of ∼0.7–3.5×1018 n s−1. This paper describes the nuclear performance for the two-component neutron source experienced in the proposed advanced H-mode D–D regimes. The calculated nuclear energy release and residual activity estimates can be important from the radiation safety, maintenance and staged ITER construction standpoints.