Process for the production of sintered nuclear fuel pellets from

Details Process for the production of sintered nuclear fuel pellets from Process for the production of sintered nuclear fuel pellets from

1994-01-12

1995-02-21

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Consolidation of powder prior to sintering

419 48, 423 11, 423 16, B22F 100, C01G 5600

Patent

active

053913477

ABSTRACT:
Process for obtaining fritted oxide pellets of the MxOy type for nuclear fuels from solutions of soluble salts of the element or elements M, involving stage of precipitating the elements M by hydrogen peroxide in an acid medium. During this precipitation, there is an instantaneous dispersion of one of the reagents (solution of salts or peroxide) in the other, in order to obtain a homogenous mixture and an also instantaneous precipitation of the nuclei in a continuous liquid phase confined in an enclosure having minimum dimensions, the mother liquors being rapidly exhausted. The process makes it possible to obtain sintered pellets whose density exceeds 96% of the theoretical density.

REFERENCES:
patent: 4152395 (1979-05-01), Borner et al.
patent: 4271127 (1981-06-01), Borner et al.
patent: 4615834 (1986-10-01), Yamagishi et al.
patent: 4839339 (1989-06-01), Bunker et al.
patent: 4971734 (1990-11-01), Floreancig et al.
patent: 5001107 (1991-03-01), Bunker et al.
Reactor Fuel Processing, fol. 5, No. 3, Jul. 1962, pp. 61-71, "Production of uranium, thorium, plutonium and their compounds".

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