Conceptual study of vertical sector transport maintenance for DEMO fusion reactor

Hiroyasu Utoh, Kenji Tobita, Youji Someya, Haruhiko Takase

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The maintenance scheme is a critical issue for DEMO design, and requires high availability of the reactor. The SlimCS, designed in JAEA, adopts the horizontal sector transport hot cell maintenance scheme. In order to determine the most appropriate DEMO reactor maintenance scheme, it is important to assess the various maintenance schemes. In this paper the vertical sector transport maintenance concept is proposed for the first time. In the sector maintenance scheme, the amount of cutting/re-welding of the piping is minimized. The sector including blanket modules and a high-temperature shield was divided into 10° segments in a toroidal direction. The sectors are designed to be removed and re-inserted through upper alternate vertical maintenance ports. In the case of the vertical sector transport maintenance scheme, inter-coil structures could be adopted for use against turnover force in toroidal field (TF) coils. This shows an advantage in DEMO maintenance compared with horizontal sector transport.

Original languageEnglish
Pages (from-to)1409-1413
Number of pages5
JournalFusion Engineering and Design
Issue number7-8
Publication statusPublished - 2012 Aug
Externally publishedYes


  • DEMO
  • Design
  • Fusion reactor
  • Maintenance
  • Vertical sector transport

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering


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