Seal Ring Installation Device Shortens Outage Time during an Overhaul

摘要

During the recent overhaul of its 663-MW Shasta plant, the U.S. Department of the Interior's Bureau of Reclamation needed a method to quickly and efficiently replace the stationary seal rings. Personnel developed a device that would allow the seal rings to be in the turbine pit with the headcover and boring bar installed. The seal rings then were installed and machined while the contractor worked on the stator rewind overhead. This device was used on the final three of the five units overhauled at this plant and reduced total outage time by several hundred man-hours.