Process for the production of spherical fuel elements

Details Process for the production of spherical fuel elements Process for the production of spherical fuel elements

1985-09-04

1987-05-19

Terapane, John F.

Plastic and nonmetallic article shaping or treating: processes

Shaping or treating radioactive material

252637, 252639, 264 57, 264 63, 264 65, 264 66, 376327, 376411, 427 6, G21C 2102, G21C 2100

Patent

active

046666397

ABSTRACT:
To produce spherical fuel or absorber elements for high temperature reactors a mixture of coated nuclear fuel or absorber particles and graphite molding composition is molded into spheres, carbonized in a furnace having gas flushing and calcined in a vacuum. There are attained high throughputs without addition of transportation aides by employing as resin binders a thermosetting synthetic resin, hardening the resin at 110.degree. to 170.degree. C. and subsequently allowing the spheres to roll for 1 to 10 hours through an oven which is inclined around 2.degree. to 12.degree. to the horizontal. Thereby the oven must exhibit an increasing and decreasing temperature profile, the flushing gas introduced from both sides and be removed in a temperature zone of 400.degree. to 500.degree. C.

REFERENCES:
patent: 3978177 (1976-08-01), Huschka et al.
patent: 4045526 (1977-08-01), Iwamoto et al.
patent: 4140738 (1979-02-01), Hrouat et al.

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