Hart and McCollum: An overhead job at Oconee

摘要

An ambitious refueling outage was completed last fall at Duke Energy's Oconee-3 nuclear power plant. In addition to the refueling work, activities included the replacement of control rod drive cables and the inspection and repair of some Alloy 600 welds on reactor vessel penetrations. The largest job, however, involved abating and recoating half of the carbon steel liner plates in the dome of Unit 3's containment building. The job was necessary due to the aging of the 35-year-old coating system-consisting of a zinc primer and a top layer of enamel paint-on the liner plates. Paint chips were flaking off the liner plates and falling down inside the containment building, causing plant operability concerns.