ASN considers that the nuclear safety performance of the Dampierre-en-Burly NPP is below ASN’s general assessment of EDF plant performance. The radiation protection and environmental performance is broadly in line with ASN’s general assessment of the EDF plants. With regard to nuclear safety, following the significant deterioration observed in reactor operational management in 2022, the licensee implemented a rigorous recovery plan. Several measures to improve the performance of the service responsible for reactor operational management were thus applied during 2023 and 2024. Improvements were observed in 2024, notably in the management of the facilities in compliance with the General Operating Rules (RGEs) and in documentation management. Efforts are however still required to align the site’s performance with the national average, particular regarding the management of configuration changes and control of reactivity. The in-depth inspection carried out by ASN in June 2024 also revealed the strong involvement of the site’s managerial line in the turnaround in safety performance. The various actions of the recovery plan must now be fully assimilated and implemented in the field by all personnel involved. With regard to maintenance of the facilities, the Dampierreen-Burly NPP’s performance is in line with the national average, in a high workload context marked by the fourth ten-yearly outage of the site’s reactor 4. The site must nevertheless be particularly attentive to the quality of the first-level analyses, which aim to rule on the conformity of the maintenance operations performed and on the conducting of preventive maintenance at the specified intervals. Further to the technical difficulties encountered in 2023 on the emergency diesel generator sets, the licensee took measures in 2024 to improve the availability of these generators, even though some difficulties appear to subsist. In the area of radiation protection, the performance of the Dampierre-en-Burly NPP is in line with the national average and has remained stable with respect to 2023. Although the site has one of EDF’s lowest rates of worker contamination, progress must still be made in the management of the radiological work regimes, in the performance of the radiological checks of equipment leaving controlled areas – numerous hot spots were detected in 2023 and 2024 on the site’s roadways – and in the management of the marking out of limited-stay areas. The environmental protection performance of the Dampierre-en-Burly NPP remained at a good level in 2024, 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 to improve the containment of hazardous substances and undertake the necessary actions to increase the number of effluent storage tanks to take into account the effects of climate change and the ageing of the existing tanks. With regard to labour inspection, although the deviations found in the employment of young workers were rectified by reactive corrective actions, ASN considers that the management of the workplace airing and sanitation systems also requires corrective actions and close involvement of the site. Following the deviations observed when ASN inspected the employment conditions of employees of outside contractors working on the site, several work contracts were regularised. ASN also notes that there were no serious accidents on the site in 2024. 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, • 31 centres using interventional procedures, • 38 centres using one or more diagnostic computed tomography scanners, • 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, • about 330 industrial, veterinary and research radiography devices; • activities associated with the transport of radioactive substances; • ASN-approved organisations and laboratories: • 1 organisation approved for radiation protection controls, • 5 laboratories approved for taking environmental radioactivity measurements. Chapter 7 Chapter 8 Chapter 9 ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2024 51 Regional overview of nuclear safety and radiation protection CENTRE-VAL DE LOIRE
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