Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Encased with nonfuel component
Patent
1987-07-15
1988-11-08
Jordan, Charles T.
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Encased with nonfuel component
376415, 376418, 376419, 376902, G21C 320
Patent
active
047833114
ABSTRACT:
Nuclear fuel elements are provided that are resistant to pellet-clad interaction. The closed end nuclear fuel elements comprise a zirconium or zirconium alloy tube that has a layer of lubricant, preferably graphite, on the inner surface thereof, and enriched uranium dioxide pellets that have a coating on the outer surface thereof of a thickness sufficient to absorb fission products. The coating on the pellets may be a burnable absorber or a material that has a relatively low neutron absorption compared to a burnable absorber. The combination of the layer on the tube and the coating on the pellets reduces both the stress level and the concentration of damaging fission products that would contact and react with the layer of lubricant about the inside surface of the tubular cladding and thus reduces conditions for pellet-clad interaction.
REFERENCES:
patent: 3119747 (1964-01-01), Wallace et al.
patent: 3427222 (1969-02-01), Biancheria et al.
patent: 3925151 (1975-12-01), Klepfer
patent: 3928130 (1975-12-01), Pawlin et al.
patent: 4146431 (1979-03-01), Tarasuk et al.
patent: 4541984 (1985-09-01), Palmer
Jordan Charles T.
Wendtland Richard W.
Westinghouse Electric Corp.
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