ASN Report 2022

Activated waste packaging and storage installation The Activated waste packaging and interim storage facility (Iceda), which constitutes BNI 173, is intended for the packaging and storage of various categories of radioactive waste on the Bugey site (in the Ain département). It is designed for the reception, packaging and storage of: • low-level long-lived graphite waste (LLW-LL) from the dismantling of the Bugey 1 reactor, which is destined – after interim storage – for near-surface disposal in a facility whose concept is still being studied; • activated metallic intermediate-level long-lived waste (ILW-LL) from the operation of the in-service power plants, for example parts which have spent time near the reactor core, such as control rod clusters, destined for deep geological disposal after interim storage; • some low-level or intermediate-level short-lived waste (LL/ILW-SL), called “deferred transfer” waste, intended for above-ground disposal but requiring a period of radioactive decay ranging from several years to several decades before being accepted at the Aube repository (CSA – BNI 149), operated by the French national agency for radioactive waste management (Andra). On 28 July 2020, ASN authorised the commissioning of Iceda and regulated operation of the facility through requirements relative to the operating range, the maximum storage durations for radioactive waste, the defining of criteria for activating the On-site Emergency Plan (PUI), the content of the end-of-startup file which was submitted on 24 March 2022, compliance with waste package qualification heights, and the conditions of reception of source rods from Chooz A. The first activated waste package was received in late September 2020. By letter of 5 May 2021, EDF submitted to the Minister responsible for nuclear safety a request to amend the Iceda Creation Authorisation Decree, to allow the acceptance of decommissioning waste from the Fessenheim NPP, which is currently being examined by ASN. Regarding packaging of the waste, ASN authorised EDF to package its waste in the C1PGSP package through resolution CODEP‑DRC-2021‑013808 of 19 July 2021. ASN nevertheless noted that complementary studies were still in progress and decided, in its authorisation, to limit the thermal power released by each package and within each storage hall and to limit the validity of its packaging agreement to 31 December 2023. The extension of this agreement is conditional upon submittal of the abovementioned additional studies no later than 31 December 2022 and the agreement of ASN following their examination. These studies were submitted to ASN on 19 December 2022 and are currently being examined by ASN. The inspections carried out in 2022 on the installation revealed weaknesses in the organisation for managing the waste produced by the process on the site. An action plan was submitted by EDF in December 2022 and will undergo examination and oversight by ASN. Inter-Regional Warehouse The Inter-Regional Warehouse (MIR – BNI 102) operated by EDF at Bugey is a storage facility for fresh nuclear fuel intended for the NPP fleet in operation. MIR presented a satisfactory overall level of safety in 2022, year in which its operating activities resumed following the renovation of various items of equipment. Saint-Alban nuclear power plant The Saint-Alban NPP, operated by EDF in the Isère département on the municipalities of Saint‑Alban‑du‑Rhône and Saint‑Maurice‑l’Exil, 40 km south of Lyon, comprises two 1,300 MWe PWRs commissioned in 1986 and 1987. Reactor 1 constitutes BNI 119 and reactor 2 BNI 120. ASN considers that the nuclear safety performance of the Saint-Alban NPP stands out positively with respect to its general assessment of EDF plant performance, and that its radiation protection and environmental protection performance is in line with the general assessment of the fleet. With regard to nuclear safety performance in 2022, ASN notes that the Saint-Alban NPP maintains its level. The site installations are operated and maintained satisfactorily. ASN considers that the site must continue the actions undertaken to improve the integration of Social, Human and Organisational Factors (SHOF). With regard to maintenance, reactor 2 was shut down for its refuelling and maintenance outage. ASN considers that EDF ensured the quality of performance of the planned activities and met the corresponding safety requirements. With regard to worker radiation protection, ASN considers that the operational results were satisfactory. ASN nevertheless still expects a reinforcement of the radiation protection culture and the rigour in marking out work sites, tools and nuclear waste. As far as protection of the environment is concerned, ASN wants to see faster responses to the technical problems impacting the environmental protection systems. With regard to occupational safety, ASN considers the site’s results to be relatively satisfactory. There were no serious accidents or accidents related to critical risks. This being said, several “near-accidents” associated with the electrical risk require particular attention. 40 ABSTRACTS – ASN Report on the state of nuclear safety and radiation protection in France in 2022 Regional overview of nuclear safety and radiation protection • AUVERGNE‑RHÔNE‑ALPES •