ASN Report 2023

3. Facilities containing radioactive or fissile substances and meeting characteristics defined by Decree of the Council of State; 4. Particle accelerators meeting characteristics defined by Decree of the Council of State; 5. Deep geological repositories for radioactive waste mentioned in Article L. 542-10-1 of the Environment Code. The installations and facilities are subject to the BNI System, governed by Chapters III and VI of Title IX of Book V of the Environment Code and their implementing texts. The list of BNIs as at 31 December 2023 figures in an appendix to this report. Prevention of accidental risks and nuclear safety The fundamental internationally adopted principle underpinning the specific organisational system and regulations applicable to nuclear safety is that of the responsibility of the licensee (see chapter 2). The public authorities ensure that this responsibility is fully assumed, in compliance with the regulatory requirements. As regards the prevention of risks for workers, BNI licensees are required to implement all necessary means to protect workers against the hazards of ionising radiation. They must more particularly ensure compliance with the general rules applicable to all workers exposed to ionising radiation (work organisation, accident prevention, medical monitoring of workers, including those of outside contractors, etc.). As regards protection of the population and the environment, the BNI licensee must also take all necessary steps to achieve and maintain an optimum level of protection. More particularly, discharges of liquid and gaseous effluents, whether radioactive or not, are strictly limited (see chapter 3). Zones with low radon potential Zones with low radon potential but in which specific geological factors can facilitate radon transfer to buildings Zones with significant radon potential Radon potential zones defined according to the radon exhalation fluxes from the ground: Source: IRSN. Radon potential zones in metropolitan France defined by the Order of 27 June 2018 ASN Report on the state of nuclear safety and radiation protection in France in 2023 105 • 01 • Nuclear activities: ionising radiation and health and environmental risks 01 05 15 08 11 04 14 06 07 13 AP 03 10 02 09 12

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