DUNC THRESHER RADIATION SURVEY.
NAVAL ORDNANCE LAB WHITE OAK MD
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A radiation survey was made in the area of the Thresher sinking using the DUNC underwater gamma spectrometer. Any release of fission products added less than 3 to the normal radioactivity of the water. Other, less sensitive, gamma spectrometers were used to survey larger areas and to test points on the bottom. No fission products were found. Author