High speed radiation scanning technique for simultaneously deter

Details High speed radiation scanning technique for simultaneously deter High speed radiation scanning technique for simultaneously deter

1975-10-14

1976-12-21

Dixon, Harold A.

Radiant energy

With infrared or thermal pattern recording

Thermal copying of documents

250359, G03C 900, G01M 2300

Patent

active

039990672

ABSTRACT:
A method of determining the pitch and eccentricity of the winding of a coil unit is provided. It specifically relates to nondestructively examining completely encased heating coils used to simulate the heat generated from fuel rods in reactor studies. The method comprises (1) the use of an x-ray transmission technique through the axial centerline of the coil unit after the winding of the coil unit has been completely encased, (2) the use of a radiation detection instrument to monitor the transmitted radiation, and (3) the use of recording instrumentation calibrated as a function of the distance between windings. A change in the pitch of the winding is detected by a general increase or decrease in the distance between recorded peaks of the transmitted radiation. Eccentricity is detected by a consistent variation in distance between peaks occuring in alternate pairs.

REFERENCES:
patent: 2465676 (1949-03-01), De Ment
patent: 2511853 (1950-06-01), Kaiser
patent: 3684888 (1972-08-01), Knuflemann

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