CEA Marcoule BNI OPERATION AND DESCRIPTION CHALLENGE NEXT KEY STEPS ASN OBSERVATIONS BNI 71 Sodium treatment Risk of fire, pyrophoricity, explosion • Commissioning of the Noah sodium treatment facility (scheduled for 2037 (*)). • Removal of fuel (scheduled as of 2025 (*)). Treating the sodium is a prerequisite for decommissioning the facility and significantly reduces the risks it represents. Completion of fuel removal will be pushed back a few years. * Deadline as presented in the last file subject to public inquiry or the deadline stipulated by ASN. CEA Saclay BNI OPERATION AND DESCRIPTION CHALLENGE NEXT KEY STEPS ASN OBSERVATIONS BNI 35 Emptying of tanks MA3 to MA8 of room 98 Safety of the operations with respect to the risk of dissemination of radioactive materials Investigations into the physical state of the tanks and their retention (end scheduled in 2026). The investigations must also allow characterisation of the effluents in the tanks; the reliability of the packaging process must be ensured. All these operations shall be regulated by an ASN requirement. Clean-out of pit 99 Emptying tank-bottom contents present in the pit. In October 2022, ASN authorised the drainage operations on tank 40/4 considered to be a priority. Treatment of the sludges of tanks MA501 to MA507 Characterisation of effluents and clean-out strategy to be consolidated. ASN considers tank MA507 a priority. BNI 72 Retrieval and packaging of drums containing a mixture of waste and fragments of fuel Safety of the storage areas with respect to containment and a seismic hazard • Construction of retrieval equipment (scheduled for 2029). • Adaptation of the retrieval equipment, whatever the envisaged state of the waste. • Commissioning of retrieval equipment (scheduled for 2029). Commissioning of the retrieval equipment was initially scheduled for 2023. This deadline was pushed back to 2029 due to numerous technical and organisational difficulties. This commissioning deadline must be consolidated owing to the need to repeat the studies already carried out. The end of decommissioning is scheduled for 2059 (*). Retrieval and packaging of all the solid waste, fuels, irradiated fuels and radioactive sources Removal from storage and emptying of the pool (end scheduled for 2024 (*)). The removal operations are in progress. Given the numerous technical and organisational difficulties, the initial deadlines have been pushed back by several years. The removal from storage of blocks 108 and 116 was completed in 2022. 40 pits zone – Removal of stored irradiating waste (end scheduled in 2030 (*)). Removal of stored sources from building 116 (end scheduled in 2025 (*)). * Deadline as presented in the last file subject to public inquiry or the deadline stipulated by ASN. 356 ASN Report on the state of nuclear safety and radiation protection in France in 2023 • 14 • Decommissioning of Basic Nuclear Installations
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