May 22, 2009
LaSalle Unit 1 Automatically Shuts Down
LaSalle Generating Station Unit 1 automatically shut down at 4:35 p.m. Thursday, May 21. The plant responded as expected, safely and without incident.
MARSEILLES, Ill. (May 22, 2009) - LaSalle Generating Station Unit 1 automatically shut down at 4:35 p.m. Thursday, May 21. The plant responded as expected, safely and without incident.
The cause of the shut down appears to be a failure of a lightning protection device in the plant’s main transformer. That equipment failure caused a small fire in a portion of the transformer that was extinguished quickly by an automatic fire suppression system. Plant teams are investigating the cause of the transformer equipment failure.
As a precaution, fire department personnel from Marseilles responded to the plant site but the fire was extinguished by the time they arrived.
The LaSalle Unit 1 shutdown will not have an impact on electrical service to Exelon customers.
LaSalle County Generating Station is located approximately 75 miles southwest of Chicago. With both units at full power, the site produces more than 2,200 megawatts net, which is enough electricity for 2.3 million homes.
Exelon Corporation is one of the nation’s largest electric utilities with approximately $19 billion in annual revenues. The company has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to approximately 485,000 customers in the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE under the ticker EXC.