FIELD: nuclear power engineering; manufacture of fuel elements for fuel assemblies of nuclear reactors.
SUBSTANCE: proposed process includes introduction of aluminum and silicon oxides in molded powder which form alumosilicate as result of pellet sintering aiding in enlargement of uranium dioxide grain to 10 - 20 μm and in increasing hardness compensated for by plasticity. In this way promising pelletized fuel of enlarged grain size and desired creep rate is obtained. Fuel pellets are noted for improved performance characteristics with respect to after-sintering and for enhanced effectiveness of fuel cycle in nuclear reactor due to enhanced burn-up.
EFFECT: enlarged yield and enhanced operating safety of nuclear reactor.
1 cl, 6 dwg
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