In the USA, commercial nuclear power plants are initially licensed by the Nuclear Regulatory Commission (NRC) to operate for up to 40 years. A first licence renewal covers an additional 20 years for an operating lifetime of 60 years, and subsequent licence renewals cover a further 20 years of operation beyond that, focusing on on the management of plant ageing during the 60-80 year operating period.
The first renewal of the Browns Ferry reactors’ licensing term from 40 to 60 years was granted in 2006, meaning the units’ licences would have expired in the mid-2030s. The Tennessee Valley Authority (TVA) submitted its application for a subsequent licence renewal for the plant in January 2024. The NRC issued a safety evaluation in July 2025, and a final supplemental environmental impact statement in August. The renewed facility operating licences will expire in December 2053 for unit 1, June 2054 for unit 2, and July 2056 for unit 3.
“This is a strong example of how independent oversight and effective collaboration can deliver results that support our energy future,” said Jeremy Groom, Acting Director of the NRC’s Office of Nuclear Reactor Regulation. “The NRC confirmed that Browns Ferry’s reactors can safely operate for up to 80 years, and TVA’s responsiveness helped us complete our rigorous review nearly 3 months ahead of schedule.”
To mark the occasion, TVA hosted a signing ceremony with the NRC at the Browns Ferry site.
“The subsequent licence renewal at Browns Ferry marks a proud and historic moment for TVA and the communities we serve,” said TVA President and CEO Don Moul. “This is more than a regulatory milestone – it affirms TVA’s continued commitment to nuclear power and the future of American families, jobs and energy independence.”
Browns Ferry (Image: TVA)
Browns Ferry is TVA’s largest generating asset and can produce up to 3,954 MW of electricity, powering more than two million homes and businesses according to TVA. The authority is currently in the process of upgrading its plants through some 400 projects aimed at enhancing performance and efficiency across its nuclear fleet. These upgrades are expected to add up to 244 megawatts of additional generation over the next 10-15 years, which it says is equivalent to bringing a small modular reactor online.
Browns Ferry is one of three nuclear power plants that together account for around 42% of TVA’s electricity generation: the two-unit Sequoyah plant, which started operations in the early 1980s and is currently licensed to operate until the early 2040s; and two units at Watts Bar, connected to the grid in 1996 (unit 1) and 2016 (unit 2) and licensed to operate until 2035 and 2055 respectively. TVA said it intends to subsequent licence renewal applications for the Sequoyah and Watts Bar nuclear plants (the Watts Bar plant is still under its initial 40-year operating licences).
The NRC has issued ten licence renewals in 2025: Oconee units 1, 2 and 3; VC Summer unit 1; Point Beach units 1 and 2; Perry unit 1; and Browns Ferry units 1, 2 and 3.
