Method and apparatus for locating defective fuel rods in a react

Details Method and apparatus for locating defective fuel rods in a react Method and apparatus for locating defective fuel rods in a react

1975-05-06

1976-10-05

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

176 19LD, G01N 2572

Patent

active

039837416

ABSTRACT:
A typical embodiment of the invention permits defective fuel rods to be identified with the fuel rods arrayed in a fuel element. A bell jacket is placed over the submerged plenum ends of the fuel rods in the fuel element and gas pressure is admitted to the jacket interior to expel water from the enclosed volume and expose the plenum ends of the fuel rods to the gas stream. The cooling effect of the flowing gas on steam rising within the interior of a defective fuel rod causes the steam to condense within the plenum and increase the temperature of the exposed end of the defective rod relative to the ends of the sound rods. An infra red or other suitable temperature detector identifies the higher temperature end of the defective rod for individual removal from the fuel element and replacement, as appropriate.

REFERENCES:
patent: 3240673 (1966-03-01), Stubbs et al.
patent: 3566669 (1971-03-01), Lawrence et al.

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