During its inspections, ASN found that the overall upkeep of the premises and worksites was good. However, although management of the periodic inspections and tests is judged satisfactory on the whole, efforts must be made to guarantee that deadlines are met and certain internal procedures are updated. Furthermore, additional information is awaited in order to clarify the list of PICs in effect. Saint-Laurent-des-Eaux silos The installation, which was authorised by Decree of 14 June 1971, comprises two silos which are used to store irradiated graphite liners from operation of the GCRs of SaintLaurent A. The static containment of this waste is ensured by the concrete structures of the silo bunkers which are sealed by a steel liner. In 2010, EDF installed a geotechnical containment around the silos, reinforcing the control of the risk of dissemination of radioactive substances, which is the main risk presented by the installation. Operation of this installation is limited to surveillance and upkeep measures: radiological monitoring inspections and measurements in the silos, checking there is no water ingress, checking the relative humidity, the dose rates around the silos, the activity of the water table, monitoring the condition of the civil engineering structures. In the context of the change of decommissioning strategy for the GCRs, EDF announced in 2016 its decision to start removing the graphite sleeves from the silos without waiting for a definitive graphite waste disposal route to become available. To this end, EDF envisages creating a new graphite sleeve storage facility on the Saint‑Laurent‑des‑Eaux site. The final shutdown notification for the facility was sent by EDF in March 2022. At the end of 2022, EDF submitted the silo decommissioning file, integrating the silo emptying operations for the recovery and repackaging of the graphite waste and creation of the future graphite waste package storage facility. Based on the current assumptions made in the file currently being examined, silo emptying should begin in the early 2030’s. ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2024 55 Regional overview of nuclear safety and radiation protection CENTRE-VAL DE LOIRE
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