DOE closes $1.9B loan to restart NextEra's Duane Arnold plant

The US Department of Energy's Office of Energy Dominance Financing has closed a loan of up to $1.9 billion to NextEra Energy to finance the restart of the Duane Arnold Energy Center, Iowa's only nuclear power plant. The 615-megawatt unit is slated to return to service by early 2029 under a 25-year power purchase agreement with Google.

Key facts

• The US Department of Energy's Office of Energy Dominance Financing closed a loan of up to $1.9 billion to NextEra Energy on Sept. 8, 2026.
• The loan backs the restart of the 615-MW Duane Arnold Energy Center, enough to power nearly 500,000 homes.
• NextEra targets a return to service by the first quarter of 2029, subject to US Nuclear Regulatory Commission approval.
• A 25-year power purchase agreement with Google, announced in October 2025, underpins the restart.
• The project is expected to create nearly 1,500 jobs during construction and support more than 450 jobs in operations.
• The Iowa Utilities Commission issued a certificate authorizing construction and operation of the plant in June 2026.

What happened

The Department of Energy announced the financial close on Sept. 8, the third nuclear plant restart its Office of Energy Dominance Financing (EDF) has financed. Duane Arnold is a single-unit boiling water reactor owned and operated by NextEra Energy in Linn County, Iowa, near the town of Palo. It has been offline since August 2020.

"Restarting Duane Arnold is about delivering new power to meet new demand while generating billions of dollars in economic value for Iowans," NextEra Energy Chairman, President and CEO John Ketchum said in the DOE announcement. "By bringing new generation online to serve new demand, we can strengthen the grid, create hundreds of good-paying jobs and help ensure Iowa families and businesses are not asked to bear the costs of growth."

Deputy Secretary of Energy James P. Danly framed the loan as industrial policy. "Returning 615 megawatts of reliable baseload generation will drive down electricity costs, while supporting thousands of American jobs," he said. EDF Director Gregory A. Beard called Duane Arnold "exactly the kind of investment that will help restore American nuclear leadership."

The close also advances NextEra's consolidation of the asset. The company has definitive agreements to acquire Central Iowa Power Cooperative and Corn Belt Power Cooperative's combined 30% interest in the plant, which would leave NextEra as sole owner; CIPCO would buy output from the restarted unit under the same contract terms as Google.

Why it matters

The loan is the strongest single signal yet that reactor restarts have become a federal finance priority rather than a one-off rescue. EDF — the office formerly known as the Loan Programs Office — has now financed three restarts, including Duane Arnold, and the DOE notes it has completed four concurrent conditional commitments and financial closings under the current administration, moving capital toward restarted and new reactors quickly.

Just as consequential is who is buying the power. The restart is underpinned by a 25-year PPA with Google, which places hyperscaler demand at the center of a Midwestern restart for the first time. That matches the pattern NNN has tracked all year: data-center demand is now the dominant pull behind nuclear power deals, from record data-center nuclear contracting volumes to polling showing Americans prefer nuclear generation serving local AI data centers over gas alternatives.

Duane Arnold joins a restart queue that now spans three states. Holtec International has begun fuel loading at Palisades in Michigan, and the Crane Clean Energy Center — the renamed Three Mile Island Unit 1 in Pennsylvania — has a $1 billion conditional loan commitment finalized in November 2025 behind a Microsoft offtake. Each close makes the next restart cheaper to finance, because lenders and utilities can price against a growing book of completed federal credit deals.

Background

Duane Arnold operated for 45 years before it shut down in August 2020, after a derecho damaged the plant and officials determined repairs did not make economic sense, POWER reported. At the time it left service, the unit was licensed to operate until 2034, leaving more than a decade of licensed life on the table.

NextEra announced the restart plan in October 2025. The company is pursuing the return under a comprehensive regulatory, operational readiness and licensing process, with inspections, engineering evaluations and readiness activities under the oversight of the NRC and other federal, state and local agencies. The Iowa Utilities Commission certificate in June 2026 cleared the key state-level hurdle.

The economics rest on more than the Google contract. An economic study cited by NextEra estimates the restart could generate more than $9 billion in economic benefits for Iowa over 25 years and about $75 million in tax revenue over the project life. For context on how the DOE's financing office fits into the broader federal nuclear funding stack, see NNN's explainer on DOE nuclear funding.

What's next

The restart now hinges on NRC licensing approvals and NextEra's execution of the readiness program. Commercial operation is targeted for the first quarter of 2029, and construction-phase hiring is expected to ramp toward the projected 1,500-job peak. Watch for NRC restart authorization milestones, the first concrete dates for major equipment and inspection campaigns, and whether more shuttered units join the queue now that three restarts carry federal credit.