Management strategy of radioactive waste generated in periodic replacement may be important in the
point of view of fusion reactor design, because it has a large impact on the design of the hot cell and
waste storage in the plant. In the replacement period of a fusion power reactor, the assembly of blanket
or divertor modules needs to be removed from the reactor in order to minimize remote maintenance in
the vacuum vessel and to attain reasonable plant availability. In the hot cell, the modules will be removed
from the back plate of the assembly. Here, note that the active cooling must be done by a way that does
not cause contamination of the hot cell environment due to dispersion of tritium and tungsten dust.
In this sense, the cooling scenario is adopted that the existing pipe of cooling water in the assembly is
connected to a different cooling water system in the hot cell. On the other hand, it is assumed that the
structural material (F82H) of the blanket and divertor is not recycled due to its high contact dose rate.
It should be crushed into small pieces to reduce volume of the waste and required storage space. In this
paper, the basic idea of the waste management scenario and the conceptual design in the hot cell and
waste storage for DEMO has been proposed.
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