Nuclear performance of the D-D phase of ITER

Deuterium plasma will be used during the early phase of the International T hermonuclear Experimental Reactor (ITER) operation. For a typical reduced c ost ITER the D-D-neutron yield similar to3.5 x 10(18) n s(-1) will be accom panied by a considerable tritium production and a D-T (14.1-MeV)-neutron yi eld of similar to0.7 - 3.5 x 10(18) n s(-1). This paper describes the nucle ar performance for the two-component neutron source experienced in the prop osed advanced H-mode D-D regimes. The calculated nuclear energy release and residual activity estimates can be important from the radiation safety, ma intenance and staged ITER construction standpoints. (C) 2000 Elsevier Scien ce B.V. All rights reserved.