Method and device for detecting defective nuclear fuel elements

Details Method and device for detecting defective nuclear fuel elements Method and device for detecting defective nuclear fuel elements

1983-12-16

1987-08-04

Cangialosi, Salvatore

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Leak detection

G21C 1700

Patent

active

046844937

ABSTRACT:
Defective fuel elements in an assembly immersed in a liquid are detected using ultrasonic absorption. A train of ultrasonic waves having a frequency and duration such that propagation takes place as Lamb waves is applied to an end portion of the sheath. The echoes are detected. Transmission and detection are repeated for different frequencies. Some frequencies are in a range corresponding to absorption by water which may be contained in the sheath. Other frequencies correspond to a range for which there is an echo at a mechanical defect of the sheath, such as a crack.

REFERENCES:
patent: 3936348 (1976-02-01), Wachter et al.
patent: 3945245 (1976-03-01), Stehle et al.
patent: 4366711 (1983-01-01), Weilbacher et al.
patent: 4517152 (1985-04-01), Pieper et al.

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