DOE Closes $1.9 Billion Loan to Restart Duane Arnold Nuclear Plant in Iowa

The U.S. Department of Energy has closed a $1.9 billion loan to NextEra Energy to restart the Duane Arnold nuclear plant in Iowa. The 615 MW facility shut down in 2026 and will require NRC relicensing before returning to service, expected by 2029. Google committed to a 25-year power purchase agreement to supply its Iowa data centers, underpinning the project's financial case. The restart will create around 1,500 construction jobs and 450 permanent operations roles.

Where this fits

This is a firm-power story. Duane Arnold adds dispatchable 24/7 baseload electricity to a grid facing rising demand from data-centre proliferation. Google's willingness to sign a quarter-century contract for nuclear output, not wind or solar, confirms that data-intensive load cannot run on weather-dependent generation alone. The project also sits within a wider pattern: nuclear plants are being restarted in the U.S. precisely because renewables-heavy grids require firming, and because firms like Google see nuclear as the only firm, low-emission source that can guarantee power.

What it means

For Australia, Duane Arnold illustrates what the country is forgoing. A 615 MW coal or gas plant closing here and moving to a renewables-plus-wind system would require battery storage, transmission build-out, and gas or pumped hydro firming at whole-system cost far exceeding the plant's headline retirement saving. Australia has no Duane Arnold restart option: nuclear is banned by law. Instead, the grid must rely on firming that is either expensive (batteries, pumped hydro) or carbon-intensive (gas), or on accepting curtailment and managed demand. The faster Australia's electricity demand grows, the more visible that absence becomes.