Pull to refresh
Logo
US closes federal loan to restart Iowa's Duane Arnold nuclear plant

US closes federal loan to restart Iowa's Duane Arnold nuclear plant

Built World

Department of Energy commits up to $1.9 billion; 615-megawatt reactor targets early 2029 return

Yesterday: DOE closes $1.9 billion loan

Overview

Updated 1 hour ago

A shuttered Iowa nuclear plant is getting federal money to come back online. The Department of Energy closed a loan of up to $1.9 billion on September 8 to help NextEra Energy restart the Duane Arnold Energy Center, which a 2020 derecho knocked offline.

The 615-megawatt reactor is set to return to the grid in early 2029, pending approval from the Nuclear Regulatory Commission. Google will buy most of the output under a 25-year power purchase agreement, part of a wave of data-center demand that is pushing utilities to revive retired reactors.

Why it matters

If Duane Arnold returns on schedule, restarting old reactors becomes a proven template for powering AI data centers without new fossil generation.

Questions about this story

Free account needed to ask — your question is kept and asked for you right after sign-up. Answers are public.

No questions yet — be the first to ask.

Key Indicators

$1.9B
DOE loan commitment
Up to $1.9 billion from the Office of Energy Dominance Financing to fund the restart.
615 MW
Restart capacity
Baseload power the plant will add to the grid, enough for roughly 500,000 homes.
90%
Output contracted to Google
Share of electricity going to Google under the 25-year power purchase agreement.
~1,500
Construction jobs
Jobs supported during construction, plus more than 450 permanent positions in operations.

Voices

Curated perspectives — historical figures and your fellow readers.

Ever wondered what historical figures would say about today's headlines?

Sign up to generate historical perspectives on this story.

Play

Exploring all sides of a story is often best achieved with Play.

Most of these play right now — no account needed. Sign up to save scores, keep a streak, and unlock Debate and Predict. Log in Sign Up
Predict 3 ways this could play out. Back the one you believe — contrarian picks score more when a scenario has a resolution date. Log in to play

People Involved

Organizations Involved

Timeline

August 2020 September 2026

5 events Latest: Yesterday
Tap a bar to jump to that date
  1. DOE closes $1.9 billion loan

    Latest Financing

    Office of Energy Dominance Financing commits up to $1.9 billion to fund the restart.

  2. Iowa approves restart certificate

    Regulatory

    Iowa Utilities Commission issues generating certificate; a lawsuit follows.

  3. Google signs 25-year power deal

    Agreement

    NextEra announces the restart plan with Google as anchor customer for most output.

  4. Plant retires permanently

    Decision

    NextEra decides the repair cost is not worth it after 45 years of operation.

  5. Derecho knocks Duane Arnold offline

    Incident

    A severe windstorm damages the plant, forcing shutdown of Iowa's only nuclear reactor.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

2022-2026

Palisades Nuclear Plant restart (2022-2026)

Michigan's 805-megawatt Palisades reactor closed in May 2022 under owner Entergy. Texas-based Holtec International bought the plant and won a $1.5 billion federal loan commitment, aiming to become the first company ever to restart a decommissioned US nuclear plant.

Then

The restart faced repeated schedule slips and cost growth but remains the leading test of US reactor revival.

Now

Palisades established the regulatory and financial path later restarts now use.

Why this matters now

Duane Arnold is the third attempt following this path, and its loan is the largest so far.

2024-2026

Three Mile Island Unit 1 restart (2024-2026)

Constellation Energy shut the 837-megawatt Pennsylvania reactor in 2019. In 2024 it struck a power deal with Microsoft and announced plans to restart, then secured a $1 billion federal loan for the work.

Then

The project is the first restart tied to a major tech power purchase, with a target return in the late 2020s.

Now

It set the template of tech companies backing nuclear restarts with long-term contracts and federal financing.

Why this matters now

Duane Arnold follows the same playbook: a shuttered plant, an anchor tech buyer, and government money.

Sources

(11)