the construction of the reactors, while others arose when making modifications to or performing maintenance on the facilities. ASNR will continue to be particularly attentive to the conformity of the facilities in 2025 and will in this respect continue its inspections of the condition of equipment and systems. 2.6 Prevention and management of environmental and health impacts and non-radiological risks 2.6.1 Water intake, discharges, waste management and health impacts Limiting water intake and environmental discharges The NPPs intake water and discharge liquid and gaseous effluents into the natural environment. Water intake is primarily to cool the reactor’s systems and, to a lesser extent, for industrial uses such as the production of demineralised water or the supply of fire-fighting systems. The effluents, which can be radioactive or chemical, come from chemical conditioning of the systems, which helps preserve them, the production of demineralised water, biocidal treatments and effluent from the wastewater treatment plant. For each site, ASN sets the limit values for water intake and effluents discharge on the basis of the best available techniques in technically and economically acceptable conditions and taking into consideration the characteristics of the installation, its location and the local conditions of the water resource. It verifies that these limits have acceptable environmental and health impacts. ASN also sets the rules concerning the management of detrimental effects and the impact on health and the environment of the reactors. These rules are notably applicable to the management and monitoring of water intake and effluent discharge, to environmental monitoring and to information of the public and the authorities (see chapter 3, point 4.1). In 2024, ASN updated the resolutions governing the conditions for the intake and consumption of water as well as the conditions and limits for discharge into the environment for the Belleville-sur-Loire NPP. This update mainly concerns the use of a biocidal treatment and anti-scaling treatment of the water cooled by the site’s cooling towers. Finally, every year, the licensee of each NPP sends ASN an annual environmental report which notably contains a summary of the intakes from and discharges into the environment, any impacts they may have, and any significant events which have occurred. The impact of thermal discharges from the NPPs NPPs discharge hot liquid effluents into watercourses or the sea, either directly, from those NPPs operating with “oncethrough” cooling, or after cooling of these effluents in cooling towers, enabling some of the heat to be dissipated to the atmosphere. These thermal discharges lead to a temperature rise in the natural environment between the points upstream and downstream of the discharge which, depending on the reactors, can range from a few tenths of a degree to several degrees. These thermal discharges are regulated by ASN resolutions specific to each NPP. Since 2006, provisions have been incorporated into the ASN resolutions for advance definition of the operations of NPPs in exceptional climatic conditions leading to significant warming of the watercourses upstream of the NPPs. These special provisions are nonetheless only applicable if the security of the electricity grid is at stake (see box previous page). Waste management In compliance with the provisions of the Environment Code, EDF carries out waste sorting at source, differentiating in particular between waste from nuclear zones and other waste. For each installation, EDF produces a summary of the management of this waste, in particular presenting a description of the operations which are GRAPH 3 Liquid radioactive discharges for the NPPs in 2024 (per reactor) Blayais/4 Bugey/4 Chinon/4 Cruas-Meysse/4 Dampierre-en-Burly/4 Gravelines/6 Saint-Laurent-des-Eaux/2 Tricastin/4 Belleville-sur-Loire/2 Cattenom/4 Flamanville/3 Golfech/2 Nogent-sur-Seine/2 Paluel/4 Penly/2 Saint-Alban/2 Chooz/2 Civaux/2 0 5 10 15 20 25 30 35 40 45 50 Source : EDF Tritium (TBq) per reactor Discharges other than tritium (GBq) per reactor Activity discharged GRAPH 4 Gaseous radioactive discharges for the NPPs in 2024 (per reactor) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 Blayais/4 Bugey/4 Chinon/4 Cruas-Meysse/4 Dampierre-en-Burly/4 Gravelines/6 Saint-Laurent-des-Eaux/2 Tricastin/4 Belleville-sur-Loire/2 Cattenom/4 Flamanville/3 Golfech/2 Nogent-sur-Seine/2 Paluel/4 Penly/2 Saint-Alban/2 Chooz/2 Civaux/2 Total gases (TBq) per reactor Total halogens and aerosols (GBq) per reactor Gases (TBq) Halogens and aerosols (GBq) As there can be a different number of reactors on each site, the results are given per reactor, to enable a comparison to be made from one site to another. This therefore amounts to dividing the site's discharges by the number of reactors. For example, for the Golfech site, which has two reactors, the discharges are divided by two; for the Chinon site, which has four reactors, the discharges are divided by four. For the Gravelines site, which has six reactors, the discharges are divided by six. Activity discharged 314 ASN Report on the state of nuclear safety and radiation protection in France in 2024 The EDF Nuclear Power Plants
RkJQdWJsaXNoZXIy NjQ0NzU=