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Report No.
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Progress in design study of low aspect ratio DEMO, "SlimCS"

Tobita, Kenji; Nishio, Satoshi; Yamada, Masao*; Kakudate, Satoshi; Nakamura, Hirofumi; Hayashi, Takumi; Enoeda, Mikio; Tsuru, Daigo; Kawashima, Hisato; Kurita, Genichi; Nakamura, Yukiharu; Kamada, Yutaka; Ozeki, Takahisa; Nishitani, Takeo

Maintenance is one of critical issues that determines the torus configuration of a fusion reactor. For high availability of operation, in-vessel components should be replaceable easily. On the other hand, the in-vessel components must be supported robustly enough to withstand the electromagnetic forces acting on a disruption. In addition, the fraction of the structural material of blanket should be reduced to keep the breeding region high as possible. In order to meet these requirements, JAEA has attempted to find a sector transport maintenance scheme based on the existing technologies in industries. Possible ideas on transportation of the sector, cask and support structure of toroidal field coils for the sector transport maintenance will be presented.

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