Back to Media Room

News Releases

Callaway Energy Center is Back in Service
Repairs to the 1,190-Megawatt Nuclear Facility Have Been Completed

The Ameren Missouri Callaway Energy Center is back in service. The plant was taken out of service on July 26 as a result of an electrical fault on the main electrical power cables exiting the plant. The arc was caused by a ventilation louver that had dislodged and came in close proximity to the electrical cables. Inspections performed of the cabling and transformers revealed the impacts were limited to the local arc flash and major equipment replacements were not necessary.

The Callaway Energy Center generates about 20 percent of the electricity supplied to Ameren Missouri’s 1.2 million customers. While the Callaway Energy Center was out of service, power was provided to the grid by other power plants within the Ameren system.


Ameren Missouri has been providing electric and gas service for more than a century, and our electric rates are among the lowest in the nation. We serve 1.2 million electric and 127,000 natural gas customers in central and eastern Missouri. Our mission is to meet their energy needs in a safe, reliable, efficient and environmentally responsible manner. Our service area covers 63 counties and 500 towns, including the greater St. Louis area. For more information, visit AmerenMissouri.com.

CONTACT: Missouri Communications, 314.554.2182, MissouriCommunications@ameren.com