All Reports

In August 2019, the Tennessee Valley Authority (TVA) Board of Directors approved the installation of aeroderivative combustion turbines (CTs), a first-of-its-kind technology for TVA.  The site of the former Johnsonville Fossil Plant was selected for the aeroderivative generation.  TVA initiated the Johnsonville Aeroderivative CT project in September 2019 with a planned project cost of $498.5 million and an in‑service date of September 2023.  In December 2021, the planned project cost increased to $598.9 million due to changes in the model o

We performed an audit of costs billed to the Tennessee Valley Authority (TVA) by a contractor for services in connection with the construction permit application for deployment of a BWRX-300 small modular reactor at the TVA Clinch River Nuclear site.  Our audit objective was to determine if costs billed to TVA were in accordance with the contract’s terms.  Our audit scope included approximately $31.6 million in costs billed from July 1, 2022, through August 31, 2025. 

We performed an audit of costs billed to the Tennessee Valley Authority (TVA) by a company for services related to cooling tower fill repair at Watts Bar Unit 1.  The objective of our audit was to determine if costs were billed in compliance with the contract’s terms.  Our audit scope included about $18.4 million in costs paid from October 2, 2023, through December 31, 2025.

The Tennessee Valley Authority (TVA) initiated the Allen Aeroderivative Combustion Turbine (CT) project in May 2023.  The purpose of the project was to install 6 aeroderivative CTs that would replace 200 of the 240 megawatts lost when TVA demolished 16 CT units at the Allen CT site in Memphis, Tennessee.  TVA’s Generation Projects and Outage Management organization is responsible for executing the Allen Aeroderivative CT project.  Because aeroderivative technology is new to TVA, we performed an evaluation to determine whether the Allen Aeroderivative CT project (1)&nbsp

The Tennessee Valley Authority (TVA) entered into a partnership with state agencies, local power companies (LPCs), and third-party developers to create a foundational network of publicly available electric vehicle (EV) fast-charging stations in its seven-state region.  The Fast Charge Network (FCN) program was designed to support installation of fast charging stations at least every 50 miles along interstates and major highways. 

The Tennessee Valley Authority (TVA) operates Browns Ferry Nuclear Plant (Browns Ferry), Sequoyah Nuclear Plant (Sequoyah), and Watts Bar Nuclear Plant (Watts Bar), which have a combined generating capacity to power more than 4.5 million homes and businesses.  During calendar years (CY) 2024 through 2025, these three nuclear plants used about 1,410 fuel assemblies combined.

According to the Occupational Safety and Health Administration, worker fatigue increases the risk for illness and injuries and has been a contributing factor in several industrial disasters.  The Tennessee Valley Authority’s Nuclear Fatigue Rule (NFR) procedure establishes requirements for managing fatigue and controlling work hours in accordance with Title 10 Code of Federal Regulations, Part 26, Subpart I, Managing Fatigue.  The regulation has (1) a maximum average work hour requirement for covered individuals which limits worker hours to an average of 54 hours p

The Tennessee Valley Authority (TVA) has four coal plants that include 24 units with a combined net capacity of 5,815 megawatts.  These coal plants have operated well beyond their original book life and are among the oldest still in operation in the nation. Due to the performance and cost risks of operating an aging coal fleet, we performed an evaluation of coal plant asset condition to determine if TVA had assessed the condition of assets and had plans in place to address degradation.  

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.