The Callaway Energy Center near Fulton remains closed after a small fire in the turbine building.
Ameren Missouri says that workers have been performing tests and repairing damage from a small fire Friday night. The fire was in the "non-nuclear" power-generation side of the Callaway County nuclear facility. An Ameren spokesman says cables that connect the plant to the electric grid shorted, causing nearby insulation to catch fire.
An earlier press release said the center is "out of service in accordance with safety protocols and procedures."
The Callaway Energy Center just outside Fulton is back in service this week after a routine shutdown for refueling and maintenance. The plant was out of commission for 50 days while several new modifications were made in addition to normal inspections and tests.
Barry Cox, the senior director of nuclear operations for the plant, says the improvements mean it will take a few days for the plant to get back to full capacity.