With regard to the periodic safety review, the licensee has put in a lot of work to allow its examination. CIS bio international must continue to implement the associated action plans. Delays are nevertheless announced in the updating of the baseline requirements in order to take this examination into account. Particular efforts must be made on this file. A large number of projects, studies and works undertaken by CIS bio international were completed in 2023. In some cases, these projects help to improve the safety of the facility or to reduce the source term with the finalising of removal of disused high-activity sealed sources. Broadly speaking, the large-scale projects undertaken by CIS bio international require better scheduling so that they can be examined appropriately for the risks they represent as a whole. To conclude, ASN observes a deterioration in CIS bio international’s performance in 2023, despite the improvement process applied since 2019. Operating rigour, maintaining the safety culture and the oversight of operations remain the areas on which CIS bio international must focus its efforts. Particular attention must also be paid to the human and technical resources deployed on the themes of safety and radiation protection. The CEA Fontenay-aux-Roses site Created in 1946 as the CEA’s first research centre, the Fontenay‑aux‑Roses site is continuing its transition from nuclear activities towards research activities in living sciences. The CEA Fontenay‑aux‑Roses site, part of the CEA Paris‑Saclay centre since 2017, comprises two BNIs, namely Procédé (BNI 165) and Support (BNI 166). BNI 165 accommodated the research and development activities on nuclear fuel reprocessing, transuranium elements, radioactive waste and the examination of irradiated fuels. These activities were stopped in the 1980s-1990s. BNI 166 is a facility for the characterisation, treatment, reconditioning and storage of legacy radioactive waste from the decommissioning of BNI 165. Broadly speaking, the CEA’s decommissioning and waste management strategy has been examined by ASN, which stated its position in May 2019 on the priorities defined by the CEA (see chapters 14 and 15 of the full ASN Report). Decommissioning of the Fontenay‑aux‑Roses site includes priority operations because it presents particular risks, linked firstly to the quantity of radioactive waste present in the facilities, and secondly to the radiological contamination of the soils under part of one of the BNI 165 buildings. In addition to this, the Fontenay‑aux‑Roses centre, which is situated in a densely-populated urban area, is engaged in an overall delicensing process. PROCÉDÉ AND SUPPORT FACILITIES Decommissioning of the two facilities Procédé and Support, which constitute BNI 165 and BNI 166 respectively, was authorised by two Decrees of 30 June 2006. The initial planned duration of the decommissioning operations was about ten years. The CEA informed ASN that, due to strong presumptions of radioactive contamination beneath one of the buildings, to unforeseen difficulties and to a change in the overall decommissioning strategy of the CEA’s civil centres, the decommissioning operations had to be extended and that the decommissioning plan would be modified. In June 2015, the CEA submitted an application to modify the prescribed deadlines for these decommissioning operations. ASN deemed that the first versions of these decommissioning decree modification application files were not admissible. In accordance with the commitments made in 2017, the CEA submitted the revised versions of these files in 2018. These files were supplemented over the 2019‑2021 period, particularly with respect to the planned decommissioning operations and their schedule. The CEA forecasts end of decommissioning of the BNIs beyond 2040, perhaps even 2050 in the case of BNI 165. These two projects are currently being examined. The new decrees will set the future decommissioning characteristics, and notably their completion time frame. 68 ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2023 Regional overview of nuclear safety and radiation protection • ÎLE-DE-FRANCE •
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