Analysis of plasma position control for DEMO reactor

原型炉におけるプラズマ位置制御解析

高瀬 治彦; 宇藤 裕康; 坂本 宜照; 森 一雄; 工藤 辰哉; 飛田 健次

Takase, Haruhiko; Uto, Hiroyasu; Sakamoto, Yoshiteru; Mori, Kazuo; Kudo, Tatsuya; Tobita, Kenji

幅広いアプローチ活動で設計されている原型炉のプラズマ位置制御解析に関して、数値シミュレーションコードを開発し、原型炉特有の問題について検討した。その結果、増殖ブランケットによる安定化効果は、その渦電流の時定数が10msと短く、ほとんど安定化効果には寄与しないこと、保守シナリオにより保守用ポートの配置で安定化効果が減少する等の結果を得たので、本会議で報告する。

Pre-conceptual design of DEMO reactor has been preceded under collaboration Japan and Europe (Broader Approach activities (BA)). In the case of DEMO reactor, it is important for design of plasma position control to take into account the actual shape of vacuum vessel and in-vessel components precisely since the design condition of DEMO reactor is different from current tokamak devices and ITER (for example, installation of maintenance ports). To consider the DEMO design condition, the numerical simulation that consists of three modules has been developed. As results, (1) The time constants of eddy current in the breeding blankets are less than 10ms and there is no influence to passive stabilization effect. (2) The stabilization effect of conducting components decreases by considering installation of vertical maintenance port. The adoption of vertical port is related to the choice of the maintenance scenario.