With regard to the control of intakes and discharges, the inspectors observed the ageing of certain equipment involved in the management of radioactive and chemical effluents, such as the equipment used to treat the effluents, produce demineralised water and treat the sludges resulting from this production. This ageing and the associated malfunction of certain equipment could have consequences for availability, effectiveness of treatment, quality of effluents discharged, water consumption and use of the effluent storage tanks prior to discharge into the environment. Moreover, a number of incidents that occurred in 2023, related to chemical product leaks inside the facilities of some NPPs, are also the result of equipment ageing. Finally, with regard to NPP adaptation to climate change, the campaign of tightened inspections revealed the need for each site to draw up a medium and long-term strategy taking account of its specific issues (condition of effluent-related equipment, sizing and availability of effluent storage tanks prior to discharge, constraints associated with water intakes during low-water periods, etc.). With regard to OEF from certain NPPs, this strategy must also address the issues of groundwater consumption, notably to better identify and prevent leaks which could affect the underground networks. This campaign of in-depth inspections will be repeated in 2024 on three other NPPs, on the topics of controlling the containment of liquid pollution incidents. Several incidents of this type also occurred in 2023. GRAPH Liquid radioactive discharges for the NPPs in 2023 (per pair of reactors) 3 0 10 20 30 40 50 60 70 80 90 100 110 0 10 20 30 40 50 60 70 80 90 100 110 Blayais/2 Bugey/2 Chinon/2 Cruas-Meysse/2 Dampierre-en-Burly/2 Gravelines/3 Saint-Laurent-des-Eaux Tricastin/2 Belleville-sur-Loire Cattenom/2 Flamanville Golfech Nogent-sur-Seine Paluel/2 Penly Saint-Alban Chooz Civaux Activity discharged Tritium (TBq) Other than Tritium (GBq) GRAPH Gaseous radioactive discharges for the NPPs in 2023 (per pair of reactors)) 4 0 1 2 3 4 0 0.02 0.04 0.06 0.08 Activity discharged Gas (TBq) Halogens and aerosols (GBq) Blayais/2 Bugey/2 Chinon/2 Cruas-Meysse/2 Dampierre-en-Burly/2 Gravelines/3 Saint-Laurent-des-Eaux Tricastin/2 Belleville-sur-Loire Cattenom/2 Flamanville Golfech Nogent-sur-Seine Paluel/2 Penly Saint-Alban Chooz Civaux As there can be a different number of reactors on each site, the results are given “per pair of reactors”, to enable a comparison to be made from one site to another. This for example entails: keeping the results as they are for the Golfech site, which has two reactors; dividing by two those of Chinon, which has four reactors (Chinon/2); dividing by three those of Gravelines, which has six reactors (Gravelines/3). Moreover, the discharge data for each site, sent to ASN by EDF, are not representative of the operating time of the facilities or activities. ASN Report on the state of nuclear safety and radiation protection in France in 2023 309 • 10 • The EDF Nuclear Power Plants 10 05 15 08 11 04 14 06 07 13 AP 03 02 09 12 01
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