Plasma and Fusion Research

Volume 11, 2405047 (2016)

Regular Articles

Proposal for the Method of Maintaining Breeder Blankets in the LHD-Type Helical Fusion Reactor FFHR
Takuya GOTO, Junichi MIYAZAWA, Hitoshi TAMURA, Teruya TANAKA, Nagato YANAGI, Akio SAGARA and the FFHR Design Group
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 30 November 2015 / Accepted 9 February 2016 / Published 17 May 2016)


A maintenance method for the breeder blanket of the LHD-type helical reactor FFHR was considered. A simple segmentation in a plane with a constant toroidal angle was proposed by utilizing the flexible arrangement capacity of the coolant path in the blanket module with a molten salt tritium breeder. Moreover, it was found that all blanket modules can be extracted by a combination of uniaxial movements and poloidal rotation without cutting of the coolant pipes inside the vacuum vessel.


helical reactor, breeder blanket, maintenance, toroidal segmentation

DOI: 10.1585/pfr.11.2405047


  • [1] A. Sagara et al., Fusion Eng. Des. 89, 2114 (2014).
  • [2] T. Goto et al., Plasma Fusion Res. 7, 084 (2012).
  • [3] H. Tamura et al., Fusion Eng. Des. 89, 2336 (2014).
  • [4] T. Tanaka et al., Fusion Eng. Des. 89, 1939 (2014).
  • [5] I. Ribeiro et al., Fusion Eng. Des. 86, 471 (2011).