UO.sub.2 pellet fabrication process

Details UO.sub.2 pellet fabrication process UO.sub.2 pellet fabrication process

1989-01-13

1991-05-14

Hunt, Brooks H.

Plastic and nonmetallic article shaping or treating: processes

Shaping or treating radioactive material

252636, 252643, 423260, 423261, 423 15, G21C 2100

Patent

active

050154222

ABSTRACT:
Making uranium dioxide pellets of controlled grain size by treating 50-500 g/l UO.sub.2 F.sub.2 with NH.sub.3 in a first and a second stages to form (NH.sub.4).sub.2 U.sub.2 O.sub.7 precipitate, wherein the NH.sub.3 /U molar ratio is between 3-5 in the first stage and between 6-12 in the second stage. The precipitate is then formed into UO.sub.2 pellets having grain size within the range from 10 to 100 .mu.m.

REFERENCES:
patent: 3726650 (1973-04-01), Welty
patent: 3758664 (1973-09-01), Gerrald
patent: 4401628 (1983-08-01), Chiang et al.
patent: 4430276 (1984-02-01), Radford et al.
patent: 4505882 (1985-03-01), Hasegawa et al.
patent: 4963294 (1990-10-01), Yato et al.

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