Grand Est Deep geological disposal project ASNR considers that the scientific experiments and work conducted by Andra in the underground laboratory at Bure continued in 2025 with a good standard of quality, comparable with that of the preceding years. On 25 November 2025, ASNR also issued an opinion on the creation authorisation application for the Cigéo project, which Andra submitted on 16 January 2023 to the Ministry responsible for nuclear safety (see chapter 13 of the full ASNR Report and the “Cigéo” notable event). Small modular reactor project in Bazancourt On 3 May 2024, Jimmy Energy submitted to the Ministry in charge of nuclear safety a creation authorisation application for a Small Modular Reactor (SMR) in Bazancourt (51). The intended purpose of this reactor would be to provide industrial heat to a factory of the Cristal Union group. On 13 February 2025, the Ministry responsible for nuclear safety asked Jimmy Energy to complete its file so that the examination could continue. Since then, the company has re-evaluated its project and announced a substantial modification to its design. Examination of the file will resume on receipt of the additional information required, particularly in relation to this change by Jimmy Energy (see chapter 9 of the full ASNR Report). Project for a MOX fuel fabrication plant at Pont-sur-Seine and Marnay-sur-Seine Newcleo is planning to build a small modular lead-cooled reactor at Savigny-en-Véron – 37 (see chapter 9 of the full ASNR Report) and a MOX fuel fabrication plant at Pont-sur-Seine and Marnay-surSeine – 10 (see chapter 11 of the full ASNR Report). In this context, on 13 December 2024 and 19 December 2025, it submitted two requests for advice to ASNR on safety options concerning the fuel fabrication plant project and the SMR project respectively. In 2026, a public debate will be held jointly for these two projects, under the aegis of the French National Commission for Public Debate (CNDP). ASNR actions to prevent radon risk Oversight actions ASNR carried out five inspections in 2025 to prevent the risk associated with this radioactive gas: • three inspections of establishments subject to mandatory radon monitoring under the Public Health Code: these revealed that the risk of exposure to radon has been clearly identified, although there are still shortcomings in terms of initial screening requirements and the frequency of measurements, as well as the display of results in some cases; • two inspections of thermal establishments: the radon risk is known and well documented, but the implementation of certain regulatory requirements needs to be continued. During these inspections, ASNR also reiterated the importance of maintaining long-term oversight of this risk and encouraged the sharing of experience and good practice, particularly between municipalities and municipal federations. Areas with radon potential in mainland France, and particularly in the Grand Est region, are shown on page 99. 86 Rn radon ABSTRACTS – ASNR Report on the state of nuclear safety and radiation protection in France in 2025 61
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