RUSSIAN DEMO PLANT STUDY

A conceptual design study of the DEMO reactor is being carried out in Russia. The main efforts are concentrated on the study of steady state reactor DEMO-S. This reactor will be operated with an advanced plasma regime involving a high fraction of bootstrap current. A divertor con cept with open liquid lithium as a plasma facing material was chosen. Two extreme approaches were analyzed: the first assumes that liquid li thium is loaded with direct heat flux from 100 to 150 MW m(-2); the co nsumption of liquid lithium and a form of lithium surface are defined; in the second approach lithium plasma dynamics in the divertor is ana lysed using the 2-D MHD divertor code. With this approach heat loads a re considerably decreased by the radiation. Some additional issues con nected with utilization of vanadium alloys in the DEMO reactor, includ ing environmental and safety aspects, material activation and refabric ation were also analyzed. (C) 1998 Published by Elsevier Science S.A. All rights reserved.