A CONTINUOUS SCAN SCINTILLATION SYSTEM FOR THE INSPECTION OF TUNGSTEN BILLETS
NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA
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A continuous scan system, employing a 200 curie Cobalt 60 source, scintillation detection of transmitted radiation, differential d.c. amplificiation and strip-chart recording, has been applied experimentally to the inspection of tungsten billets used in the fabrication of nozzles for solid propellant rocket motors. The results of a detailed inspection of an uninfiltrated billet, were in agreement with radiographic data obtained during an earlier inspection. With this billet, the volume sensitivity of the system was measured to be about five times ten to the minus two cubic centimeters. The experimental work showed the feasibility of the continuous scan method as a primary inspection method for the inspection of tungsten billets and clearly demonstrated its usefulness in the present state of development as a supplement to film radiography.
- Metallurgy and Metallography