FirstEnergy Nuclear Operating Co. (FENOC), a unit of FirstEnergy Corp., announced its Perry Nuclear Power Plant in Perry, Ohio, shut down at 12 a.m. today for scheduled refueling, maintenance and a transformer replacement that is expected to enhance reliability.
While the unit is off line, 280 of the 748 fuel assemblies will be replaced, and numerous safety inspections will be conducted on the unit's reactor vessel, turbine and electrical generator.
In addition, preventative maintenance designed to promote continued safe and reliable operations will be performed on major components, including testing more than 130 valves, replacing several control rod blades and inspecting and cleaning cooling tower piping.
During the outage, Perry will also install a new, large transformer, which is one of two circuits that provide power from the off-site transmission network to the plant's on-site electrical systems. The new transformer is about 20 feet tall and weighs 115 tons. Installation of the new equipment is expected to enhance reliability and ensure a critical power source is available for plant operation.
More than 1,000 temporary contractors and FENOC employees from the company's other nuclear plants will supplement the Perry workforce during the outage.
The 1,268 MW Perry unit operated safely and reliably since the completion of its last refueling on May 16, 2013, generating more than 18.6 million megawatt hours of carbon-free electricity. Perry also achieved a site record for consecutive days online during its most recent operating cycle, reaching 405 days of consecutive, reliable electric generation.