NextEra Energy and the U.S. Department of Energy have agreed to a deal providing a loan of up to $1.9 billion to help restart Iowa’s only nuclear power plant, the 615-megawatt Duane Arnold Energy Center in Palo. The financing moves the project another step toward returning to service during the first quarter of 2029, provided remaining regulatory and technical work stays on schedule. The restart matters because it represents one of the most significant U.S. nuclear restart efforts at a moment when utilities and developers are looking to add reliable, around-the-clock generation to increasingly power-hungry grids.
The plant operated for more than four decades before closing in 2020. It was first licensed in 1970, began commercial operations in 1975, and uses a General Electric BWR-4 boiling water reactor design. A renewed operating license was issued in 2010. NextEra began assembling a development and execution plan to restart the plant in 2024, citing what it called an “unprecedented” increase in electrical demand. The company says the project could generate more than $9 billion in economic benefits for Iowa over the next 25 years, according to a study commissioned to assess the project, and is expected to create thousands of construction and refurbishment jobs plus at least 400 permanent positions when the plant returns to operation.
The evidence comes from a single secondary source, Power Engineering, which reported the DOE loan agreement and the restart timeline. The report also notes that Google will be the primary buyer of electricity from the plant, according to an announcement last year. Duane Arnold is one of several retired U.S. nuclear plants being considered for or already undergoing a restart, joining Palisades in Michigan and the Crane Clean Energy Center, formerly Three Mile Island, in Pennsylvania. In June, the Iowa Utilities Commission issued a certificate authorizing NextEra to construct and operate the facility, marking another milestone in the restart effort.
The sector context is significant. Restarting a reactor presents unique operational and regulatory challenges because the unit is no longer operating but not fully decommissioned. The work underway at Palisades, expected to become the first retired U.S. nuclear plant returned to service, offers a glimpse of the scale Duane Arnold could face. Since acquiring the retired 800-MW Palisades plant in 2022, Holtec International has undertaken extensive inspection, refurbishment and requalification work, including reactor vessel internal inspections, more than 300 piping and weld inspections, steam generator cleaning and tube repairs, and the plant’s first comprehensive chemical cleaning of the primary coolant system. Inspections identified stress-corrosion cracking in more than 1,100 steam generator tubes, requiring a significant repair effort before restart.
The report leaves several limitations and unknowns. The DOE financing is described as a loan of up to $1.9 billion, but the source does not detail the loan’s terms, conditions, or disbursement schedule. The restart target of early 2029 is explicitly contingent on remaining regulatory and technical work staying on schedule, and the source does not specify which NRC approvals or engineering milestones remain outstanding for Duane Arnold. The $9 billion economic benefit figure comes from a commissioned study, but the source does not identify the study’s author or methodology. What to watch is whether Duane Arnold follows the Palisades path on schedule, and whether the DOE loan closes without additional conditions that could alter the restart timeline.