METHOD TO MANUFACTURE CERAMIC FUEL PELLETS Russian patent published in 2014 - IPC G21C21/02 C01G43/25 

FIELD: WITH BURNABLE ABSORBER FOR NUCLEAR REACTORS.

SUBSTANCE: FIELD: power engineering.

EFFECT: SUBSTANCE: for pressing of pellets they use a mixture of uranium dioxide powder prepared in accordance with one of available technologies with specific surface of particles of 2.0-2.2 m/g, ultradispersed powder UO₂ with specific surface of 10.5-11 m²/g, and nanocrystalline powders of oxides Gd₂O₃, TiO₂, Nb₂O₅, Al₂O₃, Cr₂O₃ Content of the ultradispersed powder UO₂ in the mixture is 5-10 wt %, nanocrystalline oxide powders Gd₂O₃ - 3-5 wt %, other oxides - 0.02-0.1 wt % Such fuel considerably excels the standard one by the index of average grain size (25-60 mcm instead of 10-20 mcm).

EFFECT: increased depth of fuel burning during its operation due to increased grain of fuel pellets, improvement of its process and operating properties due to increased plasticity, and higher reliability of operation of fuel elements

5 cl, 2 tbl