He details of impact of the fire or whether it will delay plans to for test firing in November was not yet known and a detailed assessment would be made later.
"The only consolation is that the fire is far away from boiler and turbine," he said. "It was in a peripheral area."
The 300 MegaWatt power plant, built by China on a long term Chinese credit is a lynchpin in the CEB's strategy to cut operating costs and turnaround the loss-making utility.
Power minister Champika Ranawaka said last week that the utility hoped to complete test firing and connect the plant to the national power grid by January 2011.