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France’s Flamanville Nuclear Reactor Reaches Full Power for First Time

The Flamanville 3 reactor generated 1,669 MW gross at full power, enabling equipment testing amid France's nuclear revival after long delays and increased costs, EDF said.

Summary
Update on the Flamanville EPR: the reactor has reached 100% of nuclear thermal power 14 December 2025 marks a major milestone : the Flamanville 3 reactor...

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Center

The EPR reactor in Flamanville reached for the first time "100% nuclear power". A technical success, after years of delay and major additional costs. And a symbolic step for the first reactor put into operation in France in 25 years. - The EPR reactor in Flamanville reaches for the first time its full power (Economy).

Center

Connected to the power grid in December 2024, the EPR reactor in Flamanville took a key step by reaching 100% on Sunday of its capacity The EPR reactor in Flamanville, in the northwest

·France
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Lean Right

Flamanville 3 is the first nuclear reactor to start in France for 25 years, 12 years behind the original date.

·Paris, France
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Lean Right

Energy is pleased with the "crossing of a major step" one year after the reactor was connected to the French electricity grid.

·Paris, France
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With 12 years behind schedule and a cost explosion, the EDF reactor operated for the first time at full power on Sunday 14 December 2025. But some adjustments are still to be made.

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Le Figaro broke the news in Paris, France on Sunday, December 14, 2025.
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