Abstract
A process for manufacture of pellets of (U, Pu)C by reactive sintering was developed in connection with high duty fuel for fast reactors. This method involves cold-pressing a mixture of UC powder (capable of being mixed, pressed and sintered) with a mixture of oxide of fissile material and carbon which has not been reacted or only partially reacted. The cold-pressed material is then sintered; the PuO 2 which is later to be used was simulated by UO 2. To achieve densities up to 90% theoretical, the mixture had to be partially reacted at 1300 °C. The possible advantages of this way of manufacturing (U, Pu)C pellets lie in the smaller manufacturing costs, smaller losses of plutonium, and the greater purity achievable. The simultaneous process of carbide synthesis and sintering contraction may be a disadvantage.
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