Fuel tube barrier gauge

Details Fuel tube barrier gauge Fuel tube barrier gauge

1985-08-12

1988-05-31

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Fluorescence

378 59, 378 44, G01B 1502

Patent

active

047486473

ABSTRACT:
An apparatus using X-ray fluorescence for gauging the thickness of a zirconium barrier layer on the interior surface of a zirconium alloy nuclear fuel tube is disclosed. A gamma radiation source coaxially positioned in the tube emits gamma rays which excite K-alpha and K-beta Sn X-ray in the zirconium alloy substrate. Fluorescent X-rays passing back through the barrier layer are detected by an X-ray detector coaxially positioned in the tube. Attenuation of the exciting gamma rays and the fluorescent X-rays by the barrier layer is used to determine barrier layer thickness.

REFERENCES:
patent: 2859349 (1958-11-01), Bradley et al.
patent: 3497691 (1970-02-01), Chen
patent: 3560742 (1971-02-01), Weinsteck et al.
patent: 4038550 (1977-07-01), Wassen et al.
patent: 4129778 (1978-12-01), Inove et al.
patent: 4147931 (1979-04-01), Puumalainen
patent: 4162528 (1979-07-01), Maldonado et al.
patent: 4208581 (1980-06-01), Kaneko
"Isotopenpraxis" 16th vol. No. 8/1974, pp. 303-305.

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