7 5 6 4 4 Improvement in site protection against flooding The aim is to prevent water entering the buildings of the nuclear platform in the event of extreme flooding. This consists, for example, in installing protective structures in front of the exterior access doors, low reinforced concrete walls, and filling in the openings situated in the lower part of the buildings. Since 2017, this work has been carried out on all the sites that required it. 6 Emergency management rooms It is from these rooms that the local crisis teams manage the situation in the event of an accident. After the flooding of the Blayais NPP in December 1999, work was done to ensure that the emergency management rooms were able to withstand high flood levels. Following the Fukushima accident, these rooms have now been reinforced so that they can withstand a safe shutdown earthquake. In addition, mobile crisis management resources available on the sites are stored in premises able to withstand flooding and earthquakes. 5 Ultimate backup generating set If all the existing back-up electricity resources are lost, the ultimate backup diesel generator set can restore electrical power to the equipment needed to ensure the safety of the reactor and the spent fuel pool. It also supplies the ultimate water source pumps. The building housing this equipment is designed to protect it from hazards of extreme intensity (earthquake, flooding, tornado). An ultimate backup generator set is today installed on each EDF reactor in service. 7 Nuclear rapid intervention force The FARN comprises specialised crews and equipment (transport resources, compressors, pumps, electricity generating sets, etc.) ready to intervene on an accident-stricken site and implement resources within less than 24 hours. In concrete terms, the FARN can “plug into” an NPP and provide it with water, electricity or compressed air. Nuclear accidents and developments in nuclear safety and radiation protection • 31
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