France — Nuclear Fleet Overview

Operating Reactors (database): 2 tracked in platform Total Tracked Capacity: 1650 MWe Under Construction (database): 2 Planned: 9 Regulatory Body: ASN (Autorité de sûreté nucléaire)

Fleet Summary

France operates one of the largest civilian nuclear fleets in the world, with 56 operational power reactors across 18 sites, providing a net capacity of approximately 61.4 GWe and generating over 70% of the country’s electricity. The fleet, primarily composed of pressurized water reactors (PWRs), was developed through a rapid expansion in the 1970s and 1980s under the Messmer Plan to ensure energy independence. Recent challenges include aging infrastructure, with many reactors approaching or exceeding their initial 40-year design life, prompting life-extension programs and new builds like Flamanville 3 (EPR, 1.65 GWe). The trajectory includes a renewed commitment to nuclear with plans for up to 14 new EPR2 reactors by 2050 and investment in small modular reactors (SMRs) like Nuward.

Policy & Outlook

France’s nuclear policy has pivoted toward expansion under President Macron’s 2022 energy strategy, which aims to build six new EPR2 reactors with an option for eight more, targeting first operations by 2035-2037. Legislation passed in 2023 accelerates nuclear project approvals and reinforces state control over EDF, the national utility operating the fleet, which was fully renationalized in 2023 to secure energy sovereignty. The policy also emphasizes innovation, with significant funding for SMR development, notably the Nuward project (300-400 MWe), aiming for deployment by the 2030s to complement large-scale reactors and support industrial decarbonization.

Key Sites

• Flamanville Nuclear Power Plant: Located in Normandy, this site hosts the newly operational Flamanville 3 (EPR, 1.65 GWe), marking France’s first new reactor in over two decades despite significant delays and cost overruns since construction began in 2007.
• Gravelines Nuclear Power Plant: Situated in northern France, it is the largest nuclear site by capacity with six 900 MWe reactors (total ~5.4 GWe), and is slated for two additional EPR2 units under the new build program.
• Cadarache Research Center: A key hub for nuclear R&D managed by the CEA, it houses the under-construction Jules Horowitz Reactor (JHR) for materials testing and is a focal point for advanced reactor design studies.

Historical Context

France’s nuclear program began in the 1950s with early research reactors under the Commissariat à l’Énergie Atomique (CEA), followed by the first power reactor, Chinon A1, coming online in 1963. The 1973 oil crisis catalyzed the ambitious Messmer Plan, leading to a massive buildout of standardized PWRs through the 1980s, establishing France as a global leader in nuclear energy. A notable incident was the 2009 discovery of carbon segregation issues in Flamanville 3’s reactor vessel, delaying its commissioning by over a decade. Today, France leverages this legacy to position itself as a cornerstone of Europe’s low-carbon energy transition.

Operating Reactors (Platform Database)

Reactor	Site	Type	Capacity (MWe)	Operator	Commercial Operation
RHF (Réacteur Haut Flux)	—	Heavy water	—	Institut Laue-Langevin (ILL)	—
Flamanville 3	—	EPR	1650	—	—

Under Construction (Platform Database)

Reactor	Site	Type	Capacity (MWe)	Expected Operation
Jules Horowitz Reactor (JHR)	—	Pool	—	TBD
Penly 1 (EPR2)	—	EPR2	1670	TBD

Sources

• IAEA PRIS — France — IAEA Power Reactor Information System
• WNA Country Profile — World Nuclear Association
• ASN (Autorité de sûreté nucléaire) — National nuclear regulator

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Enriched by Grok · Second Atomic Age Nuclear Wiki · 2026-05-10