Method for removing scale from nuclear fuel rods

Details Method for removing scale from nuclear fuel rods Method for removing scale from nuclear fuel rods

1981-11-19

1984-07-24

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 37, 376310, 423 4, B08B 500

Patent

active

044616503

ABSTRACT:
A neclear fuel rod assembly used in a nuclear reactor and deposited with radioactive scale is taken out of a fuel pool and disposed in a substantially sealed vertical casing, while the scale is still wetted by water. Gas in the casing is heated to a temperature higher than room temperature by the heat of nuclear fission or an electric heater to dry and peel off the scale. A mixture of the scale and water collected in a bottom portion of the casing is sent to a waterscale separator. To rapidly and perfectly remove the scale, after completing the step described above, water is sprayed onto the fuel rod assembly to wet remaining scale. Then, the drying of the scale with hot gas is repeated again.

REFERENCES:
patent: 3375169 (1968-03-01), McHugh et al.
patent: 3714323 (1973-01-01), Dolci et al.
patent: 3984345 (1976-10-01), Heylen et al.

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