Why do this project? During the 2009 Trenton #5 shutdown, the original equipment manufacturer (OEM) recommended replacement of the IP rotor impulse row of blades because of wear from solid particle erosion. The blades are configured in pac...
AI summary During the 2009 Trenton #5 shutdown, the OEM recommended replacing the IP rotor impulse row blades due to wear. A temporary weld repair was done to allow planned replacement in 2010. The outage was also used to complete other OEM-recommended work, including various blade, seal, and component replacements.
Why do this project now? Delaying the project beyond 2010 increases the risk of a shroud failure, which could result in an unplanned unit outage of significant duration. The OEM has confirmed that the weld repair carried out in 2009 should...
AI summary The project should proceed now to avoid the risk of a shroud failure, which could lead to a prolonged unplanned outage. The OEM has stated that the 2009 weld repair is only a temporary solution until replacement blades arrive in 2010.
Why do this project this way? The project should be completed in accordance with OEM recommendations on a planned basis in 2010. An additional year of run-time increases the risk of an in-service impulse blading shroud failure which would...
AI summary The project should be completed according to OEM recommendations during the 2010 planned maintenance shutdown to avoid risks of impulse blading shroud failure. The variance in cost is due to updated vendor quotes, resulting in a decrease in material costs.