The U.S. Nuclear Regulatory Commission will announce in the March 27 Federal Register the issuance of a supplemental environmental impact statement on the renewal of Tennessee Valley Authority (TVA) operating licenses DPR-77 and DPR-79 for an additional 20 years of operation for Sequoyah Nuclear Plant Units 1 and 2 (SQN).
In January 2013, TVA applied for renewed operating licenses for Sequoyah Units 1 and 2 for an additional 20-year period. The existing licenses (DPR-77 and DPR-79) for this Tennessee plant expire in September 2020 and September 2021, respectively.
The draft version of the supplement to the Generic Environmental Impact Statement (GEIS) was noticed by the NRC in the Federal Register in August 2014, and noticed by the U.S. Environmental Protection Agency in the same month. The public comment period on draft supplement ended in September 2014, and the comments received are addressed in final supplement now being issued.
SQN is a two-unit, nuclear/steam facility that began commercial operation in July 1981 (Unit 1) and June 1982 (Unit 2). The nuclear reactor for each unit is a Westinghouse pressurized-water reactor (PWR), producing a reactor core rated thermal power of 3,455 megawatts thermal.
Refurbishment activities associated with these license extensions include replacement and repair of major systems, structures, and components. All original SQN steam generators have been replaced. The last steam generator replacement took place in 2012. TVA stated that no plant refurbishment activities were identified as necessary to support the continued operation of SQN beyond the end of the existing operating license terms.