1. Fusion reactor blanket device using the D, T reaction with solid tritigenic materials comprising in the vicinity of a neutron generator plasma (F), a neutron multiplicator medium (3) associated with a tritigenic medium (4) cooled by the circulation of a cooling fuid and a circulation (8, 9) of a neutral gas for the entrainment and extraction of the tritium produced in the tritigenic medium for supplying the plasma, characterized in that the association of the neutron multiplicator and tritigenic media is realized by alternate piles of pellets (17, 18) of each of these two media, which are kept in intimate contact over their entire lateral surfaces.
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