Nuclear fuel pellet design to minimize dimensional changes

Details Nuclear fuel pellet design to minimize dimensional changes Nuclear fuel pellet design to minimize dimensional changes

1976-05-19

1978-06-13

Nelson, Peter A.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

176 89, 264 05, G21C 306

Patent

active

040947386

ABSTRACT:
An improved nuclear fuel composition characterized as a mixture of the dioxide of uranium and plutonium with pores of specified sizes and volumes of each size. The volume of pores of each size are adjusted so that as each group of pores of each size is removed by the nuclear fission induced process of densification, the volume removed is balanced by the volume added by the nuclear fission induced process of solid state swelling. This fuel composition is dimensionally stable in-pile to high burnups because the rate of pore removal is matched to the rate of swelling.

REFERENCES:
patent: 3376201 (1968-04-01), Bain
patent: 3661709 (1972-05-01), Chubb et al.
patent: 3689428 (1972-09-01), Pechin et al.
patent: 3728274 (1973-04-01), Gerontopoulos et al.
patent: 3833470 (1974-09-01), Gyarmati et al.
patent: 3883623 (1975-05-01), Lay

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