Constellation advances $800 million in power uprates at its Braidwood and Byron generation stations in Illinois. Latest updates focus on the Braidwood Nuclear Generating Station which is set to commence upgrades soon. Every 18 months, the plant shuts down one of its nuclear reactors and brings in over a thousand specialized contractors to replace fuel and perform maintenance.

The latest refueling sets the stage as the plant prepares for its biggest upgrade yet. These remarks were noted by Dwayne Pickett, Constellation vice president of government affairs and regulatory advocacy. “There’s a need for power,” he said.

“There’s an opportunity to add power and to also meet that need.” Rising electricity demand from data centers has broadened the state’s outlook on renewables as well as given new life to nuclear. Constellation, the largest clean energy producer in the U.S., is focused on spending $800 million to increase output at its two largest nuclear plants in Illinois: Braidwood in Will County and Byron, southwest of Rockford. Other states across the United States are also advancing nuclear energy such as the operational Vogtle nuclear power plant in Georgia. 

Scope of Implementation on the Constellation Power Uprates at Braidwood and Byron

Constellation power uprates at Braidwood and Byron Nuclear Generating Stations is one that is expected to add a combined 158 megawatts to the grid. This is enough to power roughly 100,000 homes every year. Work at Byron began in March and is also expected to be completed in 2028. On the other hand, Braidwood will get underway next spring and will also be completed in 2029. Vice President Adam Schuerman emphasized nuclear power’s reliability.

“Solar, wind, hydro, all the other renewable sources, you can almost consider them part-time power,” he said. However, he noted that nuclear power plants are reliable and can keep going regardless of conditions. Environmental policy groups argue wind and solar offer advantages over nuclear power as Illinois prepares for rising energy demands driven by data centers.

The Braidwood-Byron project will take about three years to add generation capacity to existing plants, Pickett said. Nonetheless, after cycles of ups and downs, Pickett said nuclear energy is entering a new phase of growth and hopes Illinois will continue to take the lead.

Project Overview

• Project Name: Braidwood & Byron Nuclear Uprate Program
• Project Type: Nuclear power plant upgrades
• Value: $800 million
• Additional Capacity: 158 MW combined
• Purpose: Increase electricity generation capacity
• Status: Implementation underway

Key Stakeholders

• Developer / Operator: Constellation Energy
• Key Figures: Dwayne Pickett, Adam Schuerman
• Facilities: Braidwood Nuclear Generating Station, Byron Nuclear Generating Station

Location

• State: Illinois
• Braidwood: Will County
• Byron: Near Rockford
• Country: United States

Scope

• Reactor uprates at two nuclear stations
• Refueling and maintenance-related upgrades
• Also capacity expansion for grid reliability

Funding / Delivery Model

• Privately funded utility investment
• Also phased implementation during reactor outages
• Long-term nuclear generation enhancement strategy

Status

• Byron upgrades started in March
• Braidwood upgrades begin next spring
• Completion targets: 2028 (Byron) and 2029 (Braidwood)

Key Risks & Challenges

• Complex nuclear upgrade execution
• Also regulatory and operational requirements
• Debate over nuclear vs renewable energy expansion

Strategic Significance

• Supports rising electricity demand from data centers
• Adds power for 100,000 homes
• Also reinforces nuclear power’s role in grid reliability

Technical Highlights

• Combined output increase of 158 MW
• Multi-year implementation schedule