FESSENHEIM NUCLEAR POWER PLANT The Fessenheim NPP is situated 1.5 km from the German border and about 30 km from Switzerland. Its two reactors, which were commissioned in 1977 and definitively shut down in 2020, are currently undergoing preparation for decommissioning. ASN considers that the site is continuing decommissioning preparation conscientiously. An important milestone in the review of the decommissioning file was reached in the first half of 2024, with the holding of the associated public inquiry. As in the previous years, the decommissioning preparation activities proceeded satisfactorily and in accordance with the set schedules, with for example, completion of the preparatory work for converting the turbine hall into a waste management and storage area; preparation of the lower parts of the old steam generators for transportation to Cyclife’s facilities in Swedenfor decontamination and recovery through a melting process; continuation of treatment of activation products waste; and continuation of boron removal and achievement of the required residual level at the start of decommissioning. ASN considers moreover that the organisational changes in 2023 and the successive headcount reductions since 2020 have been well managed and have no negative impacts on site operations. The sites performance in radiation protection is considered broadly satisfactory. NOGENT-SUR-SEINE NUCLEAR POWER PLANT Operated by EDF and situated in the municipality of Nogentsur-Seine in the Aube département, 70 km north-west of Troyes, the Nogent‑sur‑Seine NPP comprises two PWRs each of 1,300 MWe, commissioned in 1987 and 1988. Reactor 1 constitutes BNI 129 and reactor 2 BNI 130. ASN considers that the performance of the Nogent-surSeine NPP is in line with its general assessment of the EDF plants in the areas of nuclear safety, radiation protection and the environment. With regard to nuclear safety, ASN considers that the results are on the whole satisfactory, but the management of unanticipated situations in the control room needs to be improved. ASN notes a distinct improvement in the management of equipment lockout/tagouts and administrative lockouts. With regard to maintenance, a notable event in 2024 was the refuelling outage of reactor 2. ASN considers that the maintenance operations during this outage went well on the whole. As far as occupational radiation protection is concerned, although ASN observes that results regarding the management of worksite radiological cleanliness remain satisfactory, significant deviations were found during inspections. These deviations concern in particular the management of the maintenance worksite access airlocks and the servicing and tracking of the radioactivity measuring devices, particularly in the site’s laundry. Particular vigilance is expected of the licensee in these aspects. Lastly, broadly speaking, ASN considers that further progress must be made in the radiation protection culture of people working on the site. With regard to environmental protection, ASN notes that the subject is receiving greater attention, but considers that the licensee’s organisation in this area can still be improved. Improvements are still required in the management of discharges and the containment of liquid pollutions in particular. Lastly, the labour inspections did not find any particular weak points, other than the abovementioned deviations in occupational radiation protection. The points to be improved identified during the inspections are moreover addressed conscientiously by the employer. AUBE WASTE DISPOSAL FACILITY Authorised by a Decree of 4 September 1989 and commissioned in January 1992, the Aube repository (CSA) took over from the Manche repository (CSM) which ceased its activities in July 1994, while benefiting from the operating experience feedback gained from the latter. This facility, located in Soulaines-Dhuys, has a disposal capacity of one million cubic metres (m3) of low- and intermediate-level, short-lived waste (LL/ILW-SL). It constitutes BNI 149. The operations authorised in the facility include the conditioning of waste, either by injecting mortar into metal containers of 5 or 10 m3 volume, or by compacting 200-litre drums. At the end of 2024, the volume of waste in the facility had reached about 387,000 m3, or 39% of the authorised capacity. According to the estimates made by the French National Radioactive Waste Management Agency (Andra) in 2016 in the concluding report on the periodic safety review of the CSA, the repository could be completely filled by 2062 rather than 2042 as initially forecast. This can be explained by having better knowledge of the future wastes and their delivery time frames, as well as by an optimisation of waste management through the compacting of certain packages. ASN considers that the CSA is operated satisfactorily in the areas of safety, radiation protection and the environment. The inspections conducted in 2024 revealed more specifically that the organisation for selecting and monitoring outside contractors was well managed and appropriate for the risks, and that the quality baseline was robust, well mastered and applied for environmental monitoring on the site. 60 ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2024 Regional overview of nuclear safety and radiation protection GRAND EST
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