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THE DEVELOPMENT OF PERIODIC, NON-DESTRUCTIVE INSPECTION TECHNIQUES, PROCEDURES, AND TRANSDUCERS FOR CVTR PRESSURE TUBES AND THERMAL BAFFLES

Author
Paxson, E.
Published
United States : [publisher not identified], 1964.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1964.
Physical Description
microfiche : negative ; 8 x 13 cm
Additional Creators
Hughes, E. T.

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Summary
The objectives, development, conclusions, and recommendations of an AEC sponsored research and development program to develop and determine periodic, non- destructive inspection techniques, procedures, and transducers for Carolinas Virginia Tube Reactor pressure tubes and thermal baffles are given. The program was to establish and specify the minimum number of inspection operations during the periodic refueling of the reactor and to develop the equipment and inspection procedures necessary to ensure a high degree of pressure tube and thermal baffle reliability. The principal inspection techniques specified and developed are ultrasonic inspection to detect defects in the straight Zircaloy portion of the CVTR pressure tubes, and visual inspection to detect defects in the pressure tabe surfaces, the reusable thermal baffle surfaces, the Conoseal gasket seats, and the pressure tube ball-cone seat. The ultrasonic inspection development program included the test type determination, the transducer development, inspection procedure and design of equipment to move the ultrasonic transducers over the surface of the pressure tube. The final method provides better than 3% test sensitivity by means of an immersed, double reflection technique utilizing cylindrically focused 5 Mc ultrasonic transducers. The visual inspection development included the speciftcation of a multipurpose borescope and an underwater viewer. The development of a vacuum drying technlque is described for drying the pressure tubes of both light and heavy water during the refueling operation. Finally, the design of a group of special tools to aid in the vacuum drying operation and ultrasonic inspection is given. (auth)
Report Numbers
CVNA-199
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: AT(30-1)-2289
NSA number: NSA-18-015517
OSTI Identifier 4064900
Research organization: Westinghouse Electric Corp. Atomic Power Div., Pittsburgh.
View MARC record | catkey: 39686484