The 20-year renewals take effect in 2020 and 2021. Unit 1 was originally issued an operating license in 1980, followed a year later by Unit 2.
TVA says the units have generated more than 500 billion kilowatt/hours of electricity. Together with Browns Ferry near Decatur, Alabama, and Watts Bar near Spring City, Tennessee, TVA says nuclear power routinely provides more than 30 percent of TVA's total power generation. Completion of Watts Bar Unit 2 early next year will increase nuclear generation to nearly 40 percent.
TVA is the nation's largest public utility, supplying power to about 9 million people in Tennessee, Alabama, Mississippi, Kentucky, Georgia, North Carolina and Virginia.