The three replica simulators are for the Alvin W. Vogtle plant in Waynesboro, Georgia; the Edwin I. Hatch plant in Baxley, Georgia; and the Joseph M. Farley plant near Dothan, Alabama.
TVA CEO Jeff Lyash said the upgrades, coupled with increased use of solar power, will help TVA reduce carbon emissions by 70 percent of 2005 levels by 2030.
The recommendations, made public Tuesday, include reducing the time and scope of some annual inspections at the nation's 90-plus nuclear power plants. Some other inspections would be cut from every two years to every three years.
Graham, focused on design and manufacturing of equipment for oil refining, petrochemical and defense industries, put its Energy Steel commercial nuclear division up for sale in March.
Watts Bar 2 has been operating non-stop for the past 17 months (or 492 days), generating more than 13.5 billion kWh of electricity.