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M&R-II - In-Bore Tools For Blanket Replacement In The Demo Fusion Reactor
J. Rey1, C. Köhly1, P. C. Polixa1, J. Reimann1
1Forschungszentrum Karlsruhe, P.O. Box 3640, 76021 Karlsruhe, Germany
Abstract: Studies for the integration of a blanket in a fusion reactor have been performed during the last year in FZK. In
these investigations a maintenance concept based on the replacement of large blanket modules and a lay-out for a
helium coolant manifold has been addressed [1]. The proposed concepts assume that about 350 blanket modules
with a weight limit of about 10 t have to be replaced through the equatorial ports of the reactor [2]. This paper
describes the design of the He cooling pipe system and the requirements and strategies for the in-bore welding
and cutting tools for (re-)placing a blanket module.
The Helium cooled fusion reactor requires a pipe system inside the Vacuum Vessel (VV) which has to be
welded, cut and re-welded with in-bore tools. The overall length of one pipe section and thus the distance the
tool has to pass, could be larger than several x 10 m. The pipes are fixed radial behind the shield modules which
are lifetime components and constitute the segmentations for the pipes compensators. Additional requirements
are path detection and position detection as well as inspection of the weld. Therefore different in-bore tool
modules are required to execute such different tasks.
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Synopsis (pdf)