Gracon is disassembling, rehabilitating, and reassembling all 12 pump turbine generators at the plant in 7–month outages. Gracon has completed 10 overhauls to date. Work includes removal and replacement of the embedded discharge ring, seal ring, wicket gates, and the runner. It also includes refurbishing the stay ring, re-contouring the stay vanes, machining the horizontal surfaces, and line boring.
New York Power Authority
Lewiston, New York