Correcting Trashrack Failure at a Pumped-Storage Plant

摘要

After the December 2005 failure of the 450-MW Taum Sauk Pumped-Storage plant, Ameren Missouri personnel discovered portions of the draft tube trashracks from the lower reservoir while cleaning out the tailrace. An investigation indicated the failures, brought on by corrosion-accelerated fatigue, occurred at the area experiencing the highest velocities during generation. A new trashrack design was developed, and the new trashracks were placed into service when the plant began operating in 2010. The trashracks have operated reliably, with no indications of cracking or degradation.