Description: During the ultrasonic (UT) inspection of K-Reactor tank by the Equipment Engineering Section in the spring of 1990, solid material (termed debris) was seen on the bottom of the tank. When the UT inspection was complete, a specially designed underwater vacuum cleaner was used to collect the accumulation at 17 monitor pin positions. This material was sent to SRL for characterization as an action item of the Reactor Corrosion Mitigation Committee. Acquisition of this debris provided an opportunity to obtain first-hand information about conditions within the tank that affect corrosion conditions and/or moderator chemistry. The purpose of this memorandum is to describe the results of the analyses and the implications of what was found.
Date: January 20, 1992
Creator: Baumann, E. W.
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