Accession Number : AD0261190

Title :   GAMMA-RAY SCANNING TECHNIQUES FOR FAST BREEDER REACTOR SAFETY STUDIES

Descriptive Note : Final rept.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : BEACH,L.A. ; PIEPER,A.G. ; YOUNG,M.P.

Report Date : 12 JUL 1961

Pagination or Media Count : 71

Abstract : A Radiation Scanning Device was constructed to observe meltdown of fast breeder reactor fuel elements in the TREAT reactor by means of self gamma emission. Although the original desired specification had been to view natural uranium pins with a space resolution of 0.1 in. and a time resolution of 1 millisecond, the system had been designed to give the above space resolution, but the time resolution would be 5 milliseconds or longer depending on the signal intensity. The system failed to give satisfactory pictures because of low signal strength which gave poor contrast against high-strength background from the container required for safety reasons. Measurements indicated that a Mark II system could be constructed to view enriched pins in the standard c ntainer with a space resolution of 0.15 in. horizontally and 0.75 in. vertically with a time resolution of 5 milliseconds. (Author)

Descriptors :   *BREEDER REACTORS, *GAMMA RAYS, *REACTOR FUEL PROCESSING, *REACTOR SAFETY SYSTEMS, CAMERAS, ELECTRONIC SCANNERS, FAST REACTORS, GAMMA COUNTERS, GAMMA EMISSION, MELTING, RADIATION MEASURING INSTRUMENTS, REACTOR CORES, REACTOR FUEL ELEMENTS, TELEVISION DISPLAY SYSTEMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE