Hauts‑de‑France The Lille division regulates nuclear safety, radiation protection and the transport of radioactive substances in the 5 départements of the Hauts-de-France region. In 2025, ASNR carried out 118 inspections in the Hauts‑de‑France region, including 37 at the Gravelines Nuclear Power Plant (NPP), 76 in small-scale nuclear activities, 3 in the field of transport of radioactive substances and 2 concerning organisations and laboratories approved by ASNR. ASNR also carried out 14 days of labour inspection in the Gravelines NPP. During 2025, the Gravelines NPP notified ASNR of 11 significant events rated level 1 and 1 significant event rated as level 2 on the International Nuclear and Radiological Events Scale (INES scale). In small-scale nuclear activities, 4 events were rated level 1 on the INES scale. 118 inspections 16 significant events on a level greater than or equal to 1 on the INES scale 0 significant event of level 2 or higher on the ASN-SFRO scale Gravelines nuclear power plant The Gravelines NPP operated by EDF is located in the Nord département on the shores of the North Sea, between Calais and Dunkerque. This NPP comprises six 900 Megawatts electric (MWe) Pressurised Water Reactors (PWRs) giving a total power of 5,400 MWe. Reactors 1 and 2 constitute Basic Nuclear Installation (BNI) 96, reactors 3 and 4 BNI 97 and reactors 5 and 6 BNI 122. ASNR considers that the performance of the Gravelines NPP is below ASNR’s general assessment of EDF’s NPPs in terms of nuclear safety and radiation protection. In terms of environmental protection, the performance is in line with ASNR’s general assessment of EDF’s NPPs. Nuclear safety performance deteriorated in 2025, particularly in the areas of maintenance and normal operation, which featured strongly in the analysis of notified events. The site has managed to stabilise its performance in terms of managing significant events and emergency situations. The plan of rigour implemented by the licensee is continuing, focusing on the areas experiencing difficulty: while the actions taken have borne fruit in terms of controlling reactivity, ASNR expects efforts to continue, particularly in the area of maintenance, by bringing together all those involved. Once again, ASNR noted a number of inappropriate practices or behaviours, non-compliance with procedures and poorly prepared or carried out maintenance activities. Finally, the conformity deviation management process, which is essential for maintaining the compliance and safety levels of facilities, needs to be made more robust. The year 2025 was again marked by significant extensions of reactor outage times, largely due to technical contingencies. Two or three reactors were shut down simultaneously for 28 weeks, making it difficult to prepare activities and allocate resources. The industrial programme was busy in 2025 with the continued deployment of modifications linked to the fourth periodic safety review and the construction of the new local emergency response centre and ultimate water sources implemented as part of the operational experience feedback from the accident at the Fukushima Daiichi NPP in Japan. THE INSTALLATIONS AND ACTIVITIES TO REGULATE COMPRISE: ▸ one basic nuclear installation: • the Gravelines NPP (6 reactors of 900 MWe) operated by EDF; ▸ small-scale nuclear activities in the medical sector: • 19 external beam radiotherapy departments, • 2 brachytherapy departments, • 30 nuclear medicine departments, of which 8 practise internal targeted radiotherapy, • 90 centres practising fluoroscopy-guided interventional procedures, • 153 computed tomography scanners, • some 4,600 medical and dental radiology devices; ▸ small-scale nuclear activities in the industrial, veterinary and research sectors: • about 600 industrial and research centres, including 23 companies with an industrial radiography activity, 6 particle accelerators, including one designed for inspecting freight trains and 2 cyclotrons, 20 laboratories, situated mainly in the region’s universities and 7 companies using gamma ray densitometers, • 340 veterinary surgeries or clinics practising diagnostic radiology; ▸ activities associated with the transport of radioactive substances; ▸ ASNR -approved laboratories and organisations: • 1 organisation approved for radiation protection controls. Chap.7 Chap 6 Chap.5 62 ABSTRACTS – ASNR Report on the state of nuclear safety and radiation protection in France in 2025
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