Historic Moment: Flamanville EPR Connected to the National Grid
he Flamanville EPR achieved a historic milestone by connecting to the French national grid on Friday, 20 December 2024. As the most powerful reactor in France, it solidifies the country’s position as a leader in low-carbon electricity generation in Europe and sets the stage for the upcoming EPR2 programme.
At 11:48 a.m. on 20 December 2024, the Flamanville EPR was officially connected to the national grid, marking a turning point for the French nuclear sector. It is the first new reactor to come online in the country since Civaux 2 began operations 25 years ago. “This is a significant moment for our nation and for our nuclear industry,” said President Emmanuel Macron, hailing it as “a technological and industrial achievement in service of the energy transition.”
Une première pour l'@EDFEPR
🔌 Le réacteur a été connecté au réseau électrique national 👇
— EDF (@EDFofficiel) December 21, 2024
Gradual Power Ramp-Up Through 2026
Following the first nuclear reaction on 3 September 2024, EDF teams carried out an intensive testing programme to ensure the reactor’s safety and reliability. After its initial connection to the grid, the reactor will gradually increase its power output, reaching 20% capacity initially and aiming for full capacity by summer 2025.
Grand moment pour le pays.
L'un des réacteurs nucléaires les plus puissants du monde, l'EPR de Flamanville, vient d’être raccordé au réseau électrique.
Réindustrialiser pour produire une énergie bas carbone, c’est l’écologie à la française. Ensemble nous y arrivons.
— Emmanuel Macron (@EmmanuelMacron) December 21, 2024
In line with operational protocols, Flamanville 3 will undergo a series of tests, including phases of grid connection and disconnection. In 2026, a first inspection (VC1) will be conducted to assess the reactor’s condition and replace the reactor vessel head, which exhibited manufacturing anomalies. This initial production phase is expected to generate approximately 14 TWh of electricity before the first scheduled maintenance.
A Symbol of French and Global Nuclear Revival
The connection of the Flamanville EPR comes at a pivotal moment as nuclear energy experiences a global resurgence. The project demonstrates the French industry’s ability to tackle major technological challenges despite delays and cost overruns during construction.
“This success proves that we have learned from the difficulties faced, enabling us to build a robust and innovative nuclear sector,” said EDF CEO Luc Rémont. Minister of Energy Agnès Pannier-Runacher added, “This monumental effort, though far from easy or perfect, has paid off for the benefit of the French people. We are applying these lessons to ensure the success of the nuclear revival announced by the President.”
C’est le jour J pour l’EPR de Flamanville.
Aujourd’hui en fin de matinée, le réacteur a été raccordé au réseau électrique. Il commence à fournir de l’électricité au réseau français. Notre objectif ? Alimenter à terme environ 2 millions de foyers français.
Cette phase de… pic.twitter.com/6oxNVZEFoU
— Agnès Pannier-Runacher 🇫🇷🇪🇺 (@AgnesRunacher) December 21, 2024
Announced in 2022 by President Emmanuel Macron, the nuclear revival plan includes the construction of six new EPR2 reactors, with an option for eight more. Flamanville 3 joins the ranks of three other operational EPR reactors worldwide, located in China and Finland, reinforcing France’s leadership in the field.
Strengthening France’s Role as Europe’s Leading Low-Carbon Electricity Exporter
With a projected output of 360 TWh in 2024, France remains Europe’s top exporter of low-carbon electricity. The commissioning of the Flamanville EPR enhances this strategic position amid growing demand for decarbonised energy.
This next-generation reactor, with a nominal capacity of 1,650 MW, can supply electricity to approximately two million households. It directly supports France’s and Europe’s climate goals while ensuring economic competitiveness through low-cost, low-carbon energy. ■