Tricastin Operational Hot Unit The Tricastin Operational Hot unit (BCOT) constitutes BNI 157. Operated by EDF, it was intended for the maintenance and storage of equipment and tooling, fuel elements excluded, originating from contaminated systems and equipment of the nuclear power reactors. In a letter dated 22 June 2017, EDF declared final shutdown of the BCOT in June 2020. The storage activities and maintenance operations are now carried out in its Saint-Dizier maintenance base. Decree 2023-1049 of 16 November 2023 authorises decommissioning of the BCOT, for which the public inquiry ran from 15 February to 17 March 2022. ASN considers that the level of safety of the BCOT is satisfactory. In 2024, ASN will be particularly attentive to compliance with the steps of the decommissioning decree and the requirements introduced by the associated new baseline requirements for carrying out the decommissioning and the structure and soil clean-up operations. Siloette, Siloé, LAMA reactors and effluents and solid waste treatment station – CEA Centre The CEA Grenoble centre (Isère département) was inaugurated in January 1959. Activities associated with the development of nuclear reactors were carried out there before being gradually transferred to other CEA centres in the 1980’s. The Grenoble centre now carries out research and development in the areas of renewable energies, health and microtechnology. In 2002, the CEA Grenoble centre began a site delicensing process. The site accommodated six nuclear installations which have gradually stopped their activities and are now in the decommissioning phase with a view to delicensing. Delicensing of the Siloette reactor was declared in 2007, that of the Mélusine reactor in 2011, of the Siloé reactor in January 2015 and of the LAMA reactor in August 2017. The last BNIs on the site (BNIs 36 and 79) were the STED and the decay storage facility. Given the final state of the site after decommissioning, ASN made their delicensing conditional upon the application of active institutional controls which enable the future use of the site to be limited to industrial purposes and the residual pollution record to be kept. ASN then declared the delicensing of the CEA Grenoble centre’s last two BNIs through ASN resolution 2023-DC-0751 of 13 January 2023. 44 ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2023 Regional overview of nuclear safety and radiation protection • AUVERGNE‑RHÔNE‑ALPES •
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