NATIONAL LARGE HEAVY ION ACCELERATOR The National Large Heavy Ion Accelerator (Ganil) economic interest group was authorised in 1980 to create an ion accelerator in Caen (BNI 113). This research facility produces, accelerates and distributes ion beams with various energy levels to study the structure of the atom. The high-energy beams produce strong fields of ionising radiation, activating the materials in contact, which then emit radiation even after the beams have stopped. Irradiation thus constitutes the main risk created by Ganil. “Exotic nuclei” are nuclei which do not exist naturally on Earth. They are created artificially in Ganil for nuclear physics experiments on the origins and structure of matter. In order to produce these exotic nuclei, Ganil was authorised in 2012 to build phase 1 of the SPIRAL2 project, whose commissioning was authorised by ASN in 2019. A new project is currently underway on the site with the “DESIR” facility, standing for Disintegration, Excitation and Storage of Radioactive Ions. The primary function of the DESIR project will be to create new experimentation areas based on beams of radioactive ions produced by the SPIRAL1 and S3 facilities (experimental area of the SPIRAL2 phase 1 facility). This project involves modifying the BNI perimeter. Examination of this file continued in 2023 and a public inquiry was held, further to which the inquiry commissioner issued a favourable opinion. Subsequently, the building permit was issued and the works have begun. Examination of the second periodic safety review of the facility is also in progress. In August, ASN asked the licensee to supplement the safety review concluding report, and the additional elements were provided in December 2023. An inspection of this periodic safety review on 20 December confirmed the Ganil’s progress in defining requirements associated with the activities and elements important for the protection of interests, even if the incorporation of these changes into the baseline operating requirements is still to be finalised. With regard to nuclear safety, ASN considers that the licensee’s organisational set-up is satisfactory. The licensee has also been able to render its radiation protection organisation more robust. However, greater rigour is required in filling out the documents relating to the periodic inspections and tests and increased vigilance regarding strict compliance with the regulatory frequencies. La Hague site The Orano site at La Hague is located on the north-west tip of the Cotentin peninsula, in the Manche département, 20 km west of Cherbourg and 6 km from Cap de La Hague. The site is situated about fifteen kilometres from the Channel Islands. THE ORANO RECYCLAGE REPROCESSING PLANTS IN OPERATION AT LA HAGUE The La Hague plants for reprocessing fuel assemblies irradiated in the nuclear reactors are operated by Orano Recyclage La Hague. Commissioning of the various units of the Fuel reprocessing and waste packaging plants UP3-A (BNI 116) and UP2‑800 (BNI 117) and the Effluent Treatment Station (STE3 – BNI 118) spanned from 1986 (reception and storage of spent fuel assemblies) until 2002 (R4 plutonium treatment unit), with the majority of the process units being commissioned in 1989‑1990. The Decrees of 10 January 2003 set the individual reprocessing capacity of each of the two plants at 1,000 tonnes per year (t/year), in terms of the quantities of uranium and plutonium contained in the fuel assemblies before burn-up (in the reactor), and limit the total capacity of the two plants to 1,700 t/year. The limits and conditions for discharges and water intake by the site are defined by ASN resolutions 2022-DC-724 and 2022-DC-0725 of 16 June 2022. Operations carried out in the plants The reprocessing plants comprise several industrial units, each intended for a particular operation. Consequently there are facilities for the reception and storage of spent fuel assemblies, for their shearing and dissolution, for the chemical separation of fission products, uranium and plutonium, for the purification of uranium and plutonium, for treating the effluents and for packaging the waste. When the spent fuel assemblies arrive at the plants in their transport casks, they are unloaded either “under water” in the spent fuel pool, or “dry” in a leaktight shielded cell. The fuel assemblies are then stored in pools to cool them down. They are then sheared and dissolved in nitric acid to separate the pieces of metal cladding from the spent nuclear fuel. The pieces of cladding, which are insoluble in nitric acid, are removed from the dissolver, rinsed in acid and then water, and transferred to a compacting and packaging unit. The nitric acid solution comprising the dissolved radioactive substances is then processed in order to extract the uranium and plutonium and leave the fission products and other transuranic elements. 74 ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2023 Regional overview of nuclear safety and radiation protection • NORMANDIE •
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