The Unit 2 reactor at the Tennessee Valley Authority’s Sequoyah Nuclear Plant returned to service at 4:53 a.m. EDT on Wednesday, following the successful completion of a refueling and maintenance outage. Plant operators will be raising power over the next several days until the unit once again achieves full power.
“The nuclear professionals at Sequoyah did an outstanding job in safely completing approximately 10,000 activities, while working more than 194,000 work-hours and maintaining the safe operation of Unit 1 at 100 percent power,” said John Carlin, Sequoyah site vice president.
“The work accomplished during this outage by a dedicated TVA team, augmented by more than 600 supplemental contract workers, will ensure safe and efficient operations continue at Sequoyah,” he said.
During the outage, workers removed all nuclear fuel assemblies from the reactor, swapping 105 of them for new assemblies, and performed routine inspections of the reactor vessel. These detailed inspections confirmed all components met or exceeded design requirements and were fully able to perform their safety functions.
Additional scheduled inspections found no issues with the unit’s steam generators that were installed during the 2012 refueling outage. Other routine maintenance activities included replacement of components within the reactor coolant system and the replacement of a low-pressure turbine rotor.
Sequoyah Unit 2 is one of six nuclear power generating units operated by TVA at three facilities. At full capacity, Sequoyah’s two, 1,100-megawatt units produce enough electricity to power more than 1.3 million homes while producing no carbon emissions. TVA also operates three units at the Browns Ferry Nuclear Plant near Decatur, Al., and one unit at the Watts Bar Nuclear Plant near Spring City, Tn., where a second unit is scheduled for completion at the end of 2015.