This report summarizes results of laboratory studies on pitting corrosion of mild steel associated with leaks of cooling coils in tanks used for storage of liquid high-heat waste (HHW) at the Savannah River Plant (SRP). The objective of this work was to establish the cause of frequent cooling coil leaks in HHW tanks following sludge removal operations and to develop methods to prevent recurrence of leaks. The sludge was removed by slurrying with water after the supernate had been removed.

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