Les cahiers de l'ASN #03 - 10 years after Fukushima

Reinforced crisis management buildings The crisis management rooms must be accessible, available and habitable in extreme situations, including in the event of long‑duration releases of radioactive or chemical substances. They must be self‑sufficient in terms of electrical power, thermal conditioning, air filtration and food and water supplies. The Orano* sites of La Hague and Tricastin today have a reinforced crisis management building. That of Orano Melox is scheduled to be commissioned in 2023. The CEA* crisis building in Cadarache is for its part still at the design stage. Since the end of 2016, the high-flux research reactor in Grenoble, operated by the Institut Laue-Langevin*, has been equipped with an emergency control station capable of withstanding extreme hazards. EDF built a new crisis management building at Flamanville capable of withstanding extreme hazards and intends to equip all of its nuclear power generating sites in this way by 2026. In the meantime, its existing crisis rooms are capable of withstanding flooding and “safe shutdown earthquakes” (with an intensity greater than the maximum historically probable earthquake). Revised emergency exercises The various works carried out for the stress tests took into account scenarios that had not been tested in the past. This had consequences for the exercise scenarios, which now include earthquakes and accidents affecting the spent fuel pools. * See glossary page 24 10 years after Fukushima, what safe ty improvements for nuclear facilities in France? • 19