Centre‑Val de Loire ASNR considers that the nuclear safety performance of the Dampierre-en-Burly NPP is below ASNR’s general assessment of EDF plant performance. On the other hand, performance in the area of environmental protection compares favourably with this assessment, while performance in the area of radiation protection matches it. In terms of nuclear safety, the results of the Dampierre-en-Burly NPP deteriorated in 2025, particularly in the area of normal reactor operation, after a slight recovery in 2024. However, progress has been made in managing circuit configuration changes and controlling reactivity. On the other hand, improvements are expected in the supervision of control room installations, the management of periodic tests and the management of documentation, which have been the cause of a large number of significant safety events. The actions of the rigorous recovery plan, implemented over the course of 2023 and 2024 and supported by the management team, must now be assimilated and implemented on the ground by all those involved. ASNR also highlights the significant improvements made by the site in fire risk management. Regarding the maintenance of the facilities, ASNR considers that the performance of the Dampierre-en-Burly NPP is in line with the national average, in a busy industrial context. However, the site must pay particular attention to the management of the emergency generator sets, for which a high number of significant safety events were declared in 2025, as well as to the quality of the first-level analyses, which are intended to determine whether maintenance operations have been carried out in accordance with requirements. In the area of radiation protection, the results of the Dampierre-enBurly NPP are in line with the national average and have improved with respect to 2024. Although the site has one of the lowest rates of contamination of workers among EDF’s NPPs, progress still needs to be made in carrying out radiological checks on equipment leaving the controlled area – contamination points having been detected in recent years on the site’s roads – and in the management of the marking of limited stay areas. The environmental protection performance of the Dampierre-enBurly NPP remained at a good level in 2025, in particular as regards management of the microbiological risk, management of copper and zinc discharges in the liquid effluents and waste management. The site must nevertheless continue its work for improving management of hazardous substance containment and increasing the number of effluent storage tanks to take into account low water levels and the problems posed by current tanks ageing. In terms of occupational safety, in the light of the inspections it has carried out on the management of explosive atmospheres, ventilation and sanitation facilities in workplaces, prevention of the risk of exposure to lead, and the use of lifting equipment, ASNR considers that the action plans put in place by the site should be continued in order to correct the deviations noted. In addition, a severe accident was reviewed by ASNR in 2025. THE INSTALLATIONS AND ACTIVITIES TO REGULATE COMPRISE: ▸ basic nuclear installations: • the Belleville‑sur‑Loire NPP (2 reactors of 1,300 MWe), • the Dampierre‑en‑Burly NPP (4 reactors of 900 MWe), • the Saint-Laurent-des-Eaux site: the NPP in operation (2 reactors of 900 MWe), and the 2 Gas-Cooled Reactors (GCRs) undergoing decommissioning and the irradiated graphite sleeve storage silos, • the Chinon site: the NPP in operation (4 reactors of 900 MWe), the 3 GCRs undergoing decommissioning, the Irradiated Material Facility (AMI) and the Inter-Regional Fuel Warehouse (MIR); ▸ small-scale nuclear activities in the medical sector: • 9 external-beam radiotherapy departments, • 3 brachytherapy departments, • 11 nuclear medicine departments, • 43 centres using interventional procedures, • 54 computed tomography scanners for diagnostic purposes in 37 centres, • some 2,700 medical and dental radiology devices; ▸ small-scale nuclear activities in the industrial, veterinary and research sectors: • 15 companies with an industrial radiography activity, • around 400 users of industrial equipment, 60 of which are subject to licensing and registration systems, • 1 cyclotron, • 25 public and private research units, • around 190 veterinary facilities providing diagnostic radiology services, including 6 with a scanner and 17 for equine radiology; ▸ activities associated with the transport of radioactive substances; ▸ ASNR-approved laboratories and organisations: • 1 organisation approved for radiation protection controls, • 5 laboratories approved for taking environmental radioactivity measurements, • 1 organisation approved for measuring radon. Chap.7 Chap 6 Chap.5 ABSTRACTS – ASNR Report on the state of nuclear safety and radiation protection in France in 2025 51
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