FLAMANVILLE NUCLEAR POWER PLANT Operated by EDF and situated in the Manche département in the municipality of Flamanville, 25 km south-west of Cherbourg, the Flamanville NPP comprises two Pressurised Water Reactors (PWRs), each of 1,300 MWe commissioned in 1985 and 1986. Reactor 1 constitutes BNI 108 and reactor 2 BNI 109. ASN considers that the performance of the Flamanville NPP with regard to nuclear safety, radiation protection and environmental protection is in line with the general assessment of EDF plant performance. In the area of nuclear safety, ASN observed a stable situation with regard to control of the state of the facilities and application of the fundamental safety principles by the plant personnel and outside contractors. With regard to reactor management and operation, ASN considers that the site’s performance is stable but remains tenuous. The restarting of reactor 2 following an outage involving numerous maintenance operations, including the ten-yearly requalifications of the secondary systems, went well on the whole. The year 2024 was nevertheless marked, as in the preceding years, by a large number of significant events notified to ASN linked to a deficiency in facility monitoring and noncompliance with the baseline operating requirements. The licensee must take action on these points to improve work rigour in the service responsible for operational management. ASN considers that the maintenance operations were carried out proficiently by the licensee during the reactor outages in 2024, despite the damage that occurred during a test on an emergency diesel generator set at the start of reactor 2 shutdown, making it necessary to review the activities schedule. In 2025, the licensee must be particularly attentive to the coordination and monitoring of subcontracted activities, especially during the reactor 2 outage during which replacement of the four steam generators is scheduled. The radiation protection performance remained stable in 2024, with an effective process for detecting and analysing significant radiation protection events. Nevertheless, anomalies regarding the wearing of dosimeters and control of the risk of contamination dispersion were still present in 2024. ASN expects to see improvements in these two points. With regard to environmental protection, ASN observes a stable situation where the licensee controls the impacts of its facilities and seeks to reduce them. The year 2025 must be used to improve responsiveness when anomalies are detected and achieve greater rigour in the treatment of the waste produced during reactor outages. With regard to labour inspection, despite an apparently robust organisation, ASN considers that the licensee is not making sufficient progress in correcting its weak points for the situation to be deemed satisfactory. The occurrence of several accidents, one of them particularly noteworthy, justified the licensee’s deployment of a specific action plan at the end of 2024. The Authority for Nuclear Safety and Radiation Protection (ASNR) will be particularly attentive to the progress and application of this action plan. Normandie The Caen division regulates nuclear safety, radiation protection and the transport of radioactive substances in the 5 départements of the Normandie region. 213 inspections 20 significant events rated level 1 or higher In 2024, ASN carried out 213 inspections in Normandie, comprising 72 in the Nuclear Power Plants (NPPs) of Flamanville, Paluel and Penly, 17 on the Flamanville EPR reactor, 64 on “fuel cycle” facilities, research facilities and facilities undergoing decommissioning, 41 in small-scale nuclear activities, 11 in the transport of radioactive substances and eight in ASN-approved organisations and laboratories. In addition to this, 21 days of labour inspection were carried out on the NPP sites and the Flamanville 3 EPR construction site. In 2024, ASN was notified of 20 significant events rated level 1 on the International Nuclear and Radiological Event Scale (INES), of which 18 occurred in Basic Nuclear Installations (BNIs) and two in small-scale nuclear activities. Lastly, in the context of their oversight duties, the ASN inspectors issued one violation report. 72 ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2024
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