Abstract
This paper presents the results of economic assessment for nuclear fusion power reactors. In the study, we perform conceptual designs of commercial fusion power reactors, and, based upon the designs, the cost of electricity of the reactors is evaluated. The evaluation, however, inevitably requires estimates of various uncertain performances of future fusion power reactors. Considering the uncertainties, we extensively execute many sensitivity analysis and mainly discuss what factor is influential to the economy. The study reveals that the beta value of plasma, neutron wall loading on the first wall, current density in toroidal coils, current-drive efficiency, and the capacity factor have strong impacts on the cost of electricity of fusion power reactors.
