METHOD OF PRODUCING PELLETED FUEL FOR FUEL ELEMENTS Russian patent published in 2015 - IPC G21C3/62 

FIELD: atomic physics.

SUBSTANCE: invention relates to the nuclear industry and production of pelleted fuel. A method of producing fuel includes mixing UO₂ powder, enriched with uranium U-235 to 5 wt %, with U₃O₈ powder in an amount of less than 15 wt %; premixing the mixture of uranium oxides with dry binder - zinc stearate to 0.3 wt % and a blowing agent - azodicarbonamide to 1 wt %; compacting, vibration milling and vibration granulation of the prepared mixture; final mixing - homogenisation with the dry binder - zinc stearate, such that the total amount of zinc stearate is not greater than 0.5 wt % taking into account the previously added zinc stearate. The method is universal and is suitable for producing fuel pellets on a "dry" scheme using any UO₃ powder obtained via an ADU process.

EFFECT: high strength of compacted products, achieving low thermal stability values, high strength of sintered pellets.

3 cl, 2 tbl