14. パルス運転トカマク核融合炉 : IDLT (<特集>核融合エネルギーの社会的受容性と科学的見通し III)

概要

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Based on scientific data bases adopted for designing ITER plasmas and on the advancement of fusion nuclear technology from the recent R&D program, the scientific feasibility of inductively-driven tokamak fusion reactors is studied. A low wall-loading DEMO fusion reactor is designed, which utilizes an austenitic stainless steel in conjunction with significant data bases and operating experiences, since we have given high priority to the early and reliable realization of a tokamak fusion plasma over the cost performance. Since the DEMO reactor with the relatively large volume(i. e., major radius of 10m)is employed, plasma ignition is achievable with a low fusion power of 0.8GW, and an operation period of 4-5 hours is available only with inductive current drive. Disadvantages of pulsed operation in commercial fusion reactors include fatigue in structural materials and the necessity of an energy storage system to compensate the electric power during the dwell time. To overcome these disadvantages, a pulse length is prolonged up to about 10 hours, resulting in the remarkable reduction of the total cycle number to 10^4 during the life of the fusion plant.
社団法人プラズマ・核融合学会の論文
1998-09-25