The French Authority for Nuclear Safety and Radiation Protection (ASNR) carries out its oversight role by using the regulatory framework and individual resolutions, inspections, and if necessary, enforcement measures and penalties, in a way that is complementary and tailored to each situation, to ensure optimal control of the risks nuclear activities represent for people and the environment. ASNR reports on its duties and produces an assessment of the actions of each licensee, in each activity sector. ASNR ASSESSMENTS ASNR assessments per licensee EDF The nuclear power plants in operation The quality of operation of the Nuclear Power Plants (NPPs) remained satisfactory in 2025. In addition, the figures for 2025 confirm that EDF has improved its management of maintenance outages for its reactors, which is beneficial for plant safety. OPERATION ASNR considers that the quality of reactor operation and control improved in 2025. In particular, ASNR noted fewer situations where installations were operated outside their planned limits, and improvements in the reliability of operations likely to have an impact on reactivity control. ASNR also takes a positive view of the gradual rollout, in the immediate vicinity of control rooms, of operation simulators designed to prepare staff for operational activities. On the other hand, after noting positive results in 2024 concerning control of system configuration, ASNR again identified shortcomings in this area. Fire risk management remains a sensitive issue, as it is one of the main risks present in a nuclear power plant. In 2025, four fire outbreaks outside the nuclear zone led to activation of the on-site emergency plan on the sites concerned, but had no impact on safety. ASNR noted improvements in fire detection management, response resources and staff training. In particular, EDF has implemented changes to its fire-fighting organisation in order to improve response conditions and to enable a fully-fledged fire to be tackled more quickly. The new organisation is designed to ensure that the fire-fighting resources deployed by EDF and by Fire and Emergency Services complement each other more effectively. At some sites, professional firefighters are on standby during the day. However, as in previous years, ASNR considers it necessary for EDF to improve the management of temporary storage of combustible materials during construction work and maintenance operations. 20 ABSTRACTS – ASNR Report on the state of nuclear safety and radiation protection in France in 2025
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