Method for manufacturing oxidic sintered nuclear fuel bodies

Details Method for manufacturing oxidic sintered nuclear fuel bodies Method for manufacturing oxidic sintered nuclear fuel bodies

1982-09-30

1985-04-23

Sebastian, Leland A.

Plastic and nonmetallic article shaping or treating: processes

Shaping or treating radioactive material

252638, 423 15, G21C 2100

Patent

active

045129398

ABSTRACT:
Method for the manufacture of oxidic sintered nuclear fuel bodies by compacting UO.sub.2 -starting powder or a mixture of UO.sub.2 -and PuO.sub.2 starting powder which contains up to 10% by weight rare-earth oxide, especially Gd.sub.2 O.sub.3, as an additive into blanks and subsequent densification of these blanks by a heat treatment in a sintering atomsphere with reducing action. The UO.sub.2 -starting powder used for compacting has a specific surface in the range of 2 to 4.5 m.sup.2 /g and/or a mean crystallite diameter in the range of 80 nm to 250 nm, and the heat treatment in the sintering atmosphere with reducing action is carried out at a temperature in the range of 1,500.degree. C. to 1,750.degree. C.

REFERENCES:
patent: 3344081 (1967-09-01), Elyard et al.
patent: 3374178 (1968-03-01), May et al.
patent: 3862908 (1975-01-01), Fitch et al.
patent: 4094738 (1975-06-01), Chubb
patent: 4119563 (1978-10-01), Kadner et al.
patent: 4278560 (1981-07-01), Sondermann
patent: 4409157 (1983-10-01), Haas et al.

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