Orano - Annual Activity Report 2025 94 3 RISK CONTROL AND VIGILANCE PLAN Vigilance plan In 2025, detailed impact studies continued on the Zuuvch Ovoo and Dulaan Uul sites in Mongolia to assess the impacts of the mining project in ISR (In Situ Recovery) and propose mitigation measures and environmental monitoring principles. In Kazakhstan, with regard in particular to the Katco site located in a sensitive area for biodiversity, the specific mitigation measures selected and implemented relate to reforestation plans covering a total of nearly 12,000 hectares, spread over the Kyzylorda regions (national project for the reforestation of the dry seabed of the Sea of Aral, called ODAM) and Turkestan (Green Belt project). In France, uranium mining was completed in 2001, with the closure of the last site located at Jouac in Haute-Vienne, and the depletion of economically mineable uranium deposits. Orano has launched a major conversion and remediation program for all its former mining sites. In total, more than 35% of these mines have been converted into ecological and/or forested areas with extremely rich biodiversity. Orano has relied on the implementation of a Simple Management Plan (PSG). This tool allows for the planning and scheduling of logging and maintenance work over a ten-year period by defining silvicultural objectives. These are maintenance operations, to prevent the forest from closing in on itself during its growth phase, and reasoned logging, when possible, to ensure the maintenance of ecosystems. These operations make it possible to promote the integration of the former site into the environment and the surrounding landscape. To date, Orano is responsible for some 1,300 hectares of French forests as part of a forest management program. For more detailed information on the measures taken at Orano’s various sites, see Section 4.2.3.3 of this report. Sustainable water management Orano’s mining and chemistry enrichment activities require water resources. In the event of a shortage, the group’s use of water and raw materials could impact ecosystems. Sustainable water management is therefore a major environmental and societal concern for Orano. A working group, consisting of the group’s largest water consumers, was initiated in 2021 to focus on water management in order to continue the efforts made within the group (such as leak detection, recycling of washing water, etc.) and to meet the commitments for reducing water withdrawals. Each major contributing site has thus developed a multi-year roadmap. The improvement of the instrumentation for industrial and potable water networks and the gradual implementation of consumption monitoring have enabled the repair of leaking networks, and the reduction of water consumption. Orano has launched a plan to improve the understanding and management of water resources (Water Master Plan) at seven of its sites, which are major consumers. The objective is to improve the understanding of water flows within a site and to identify areas for improving water management performance. The exercise includes an assessment of the level of water stress using the “Aqueduct Water Risk Atlas” tool of the World Resources Institute (WRI). Water stress is a critical situation that arises when available water resources are lower than water demand. To date, this tool indicates that no group production site is located in an area of high or extremely high-water stress. For example, in 2025, the two mining sites in production, McClean Lake and Katco, have developed their own Water Master Plan. These framework documents enable sites to ensure the longterm sustainability of their activities by identifying current and future challenges, risks and opportunities, taking into account dependencies on water resources in their respective watersheds, for efficient, resilient, and coordinated water management. These same framework documents will be developed on all sites commissioned in future years. The Tricastin site achieved a 65% reduction in its water consumption between 2015 and 2025, which to put it into perspective can be compared with the more than 26 million m3 consumed 15 years ago. This reduction has been made possible by upgrades to the industrial plant and actions linked to the adaptation of installations, backed up by real-time monitoring of consumption through the deployment of sensors enabling the reactive identification of any leaks in the supply networks, and the implementation of corrective action where necessary. The site’s water conservation efforts will continue in 2026 with the development of a water master plan and the implementation of a water conservation plan for 2026-2030. Between 2019 and 2025, the group’s water consumption was reduced by -47%. For more details on water management, see Section 4.2.2.2 of this report. Sustainable energy management Orano has reactivated a network of energy leaders since 2019 and has dedicated teams on sites to define and manage new energy performance plans (replacement of equipment operating on combustible energy with electrical equipment, use of LED lighting, etc.). Energy consumption increased between 2024 and 2025 due to the restoration of plant production levels. Nevertheless, the group reduced its energy consumption by 3% between 2019 and 2025. In 2025, Orano continued to roll out its energy roadmap with the following priorities: ● conducting in-depth energy audits to identify new projects at its most energy-intensive sites, in particular la Hague, Tricastin and Malvési; ● deploying energy performance software, known as EMS (Energy Management Systems), in order to use the data generated by the meters installed on its facilities; and ● improving the efficiency of engines/ventilation, the main consumers at industrial sites. Between 2019 and 2025, the Tricastin site achieved energy savings of 39.5 GWh thanks to process optimization and improvements in heat and cooling production. This performance is part of the trajectory towards 10% additional energy efficiency by 2030, after normalizing production effects and weather conditions. The site also plans to gradually diversify its energy sources, in particular through the integration of solar electricity. Two photovoltaic power plants, measuring 30 MWp and 2.3 MWp, installed on its grounds, will eventually produce some of the electricity used locally, thus improving the site’s energy performance.
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