All Reports

The Tennessee Valley Authority’s (TVA) three nuclear plants, Browns Ferry, Sequoyah, and Watts Bar, are capable of generating an average of 8,275 megawatts of electricity, making TVA the third-largest nuclear fleet in the United States.  In fiscal year 2025, TVA generated 56,157 million kilowatt hours of nuclear power, accounting for 33 percent of TVA’s total fleet power generation.  To maintain the nuclear fleet, TVA is making significant investment.  For fiscal year 2025, the TVA Board of Directors approved $257 million to support reliable operation of the s

We performed an audit of the Tennessee Valley Authority’s (TVA) Contract No. 15387 with a company to provide a broad range of engineering, design, and construction management support when and as requested by TVA.  The objective of our audit was to determine if the costs billed to TVA were in accordance with the contract’s terms.  Our audit scope included approximately $33.2 million in costs billed to TVA between January 1, 2024, and March 31, 2025. 

We are pleased to present our report for the period October 1, 2025, to March 31, 2026.  In this semiannual period, our audit, evaluation, and investigative activities identified more than $41.7 million in questioned costs, recoveries, fees, and savings; and opportunities for Tennessee Valley Authority (TVA) to improve its programs and operations.  In our semiannual report feature, we discuss TVA’s role and challenges in Energizing the Valley’s and America’s Future. 

The Tennessee Valley Authority’s (TVA) Enterprise Risk Management (ERM) business unit focuses on identifying and prioritizing enterprise risks.  Annually, ERM leads the preparation of an enterprise risk portfolio, which includes risks across TVA, to aid leadership in strategic and business planning processes.  Each business unit includes their specific risks in the portfolio and documents the probability of occurrence, financial impact, and actions to manage the risk.  TVA Labor Relations included Lack of Robust Pathways and Pipelines to Support Workforce Readiness and

The Tennessee Valley Authority (TVA) plans to invest approximately $7 billion to extend and preserve the life of its seven nuclear units over the next 20 years. Selection of suppliers responsible for maintenance or system upgrades within TVA’s nuclear fleet can affect TVA’s ability to maintain generation reliability.

To meet the Tennessee Valley region’s growing demand for power, the Tennessee Valley Authority (TVA) is investing in existing assets and new generation.  In fiscal year 2025, TVA invested more than $4.6 billion in capital investments and plans to invest $4.2 billion in fiscal year 2026.  Due to potential risks to cost and schedule from rework in TVA projects, we performed an evaluation of contractor rework for Major Projects at TVA.  The objectives were to evaluate TVA’s oversight of contractor rework and determine if rework was being handled in accordance with con

Due to constraints on the existing fiber network, in May 2017, the TVA Board of Directors approved the Strategic Fiber Initiative (SFI) with a budget of $300 million to expand TVA’s fiber capacity by 3,500 miles over the course of ten years on 31 prioritized routes.  In addition, TVA planned to lease surplus fiber to external entities to help offset a portion of the operational costs. As of January 2026, the 31 routes that were originally scheduled for fiber installation had been reduced to 19 routes and mileage reduced from 3,500 to approximately 1,900 miles to stay wi

Due to the importance of protecting operational technology from cybersecurity threats, we audited the security of a specific type of system access at the Tennessee Valley Authority’s (TVA) gas sites.  Our objective was to determine if a specific type of system access supporting Gas Operations was securely configured and monitored to mitigate cybersecurity threats.  We made eight recommendations to TVA management.  The specifics are being withheld from public release due to their sensitive nature in relation to TVA’s cybersecurity.

We performed an audit of costs billed to the Tennessee Valley Authority’s (TVA) by a contractor for nuclear steam supply system refueling and inspection services at TVA’s Watts Bar Nuclear Plant and Sequoyah Nuclear Plant.  The contract provided for TVA to compensate the contractor on a time and material or fixed price basis in accordance with the contract’s pricing schedule.  In addition, the contract provided that (1) outside personnel used for craft labor would be reimbursed at the contractual TVA Project Maintenance and Modification Agreement rates plus an admi

The Tennessee Valley Authority’s (TVA) Enterprise Risk Management (ERM) business unit (BU) focuses on identifying and prioritizing enterprise risks.