- 322 - The CEA has envisaged the following measures (some of which were mentioned earlier in this report) to reinforce the accident management capabilities of the Phénix facility in particular: procuring means to limit the ingress of water into the buildings (inflatable anti-flood tubes); establish a preparation procedure for the mobile pumping means in the event of forecast river flooding or rainfall events; have a buffer volume for storing potentially contaminated water before treatment and discharging into the environment; study the setting up of argon or nitrogen tanks and injection means to ensure the inerting of certain sodium-containing areas; study the implementation of means of injecting Marcalina power into the sodium-containing areas to extinguish a fire; specify its plan of action relative to complementary sodium fire extinguishing means. These measures chiefly target the means of fighting floods and sodium fires. In addition, in the framework of the centre's CSA that will be submitted in September 2012, the licensee has undertaken to examine the environmental instrumentation necessary for emergency management. ASN considers it necessary for the CEA to implement additional measures for managing the situations that can lead to sodium fires. ASN will issue a requirement for CEA to submit a plan of action relative to the setting up of complementary means for extinguishing sodium fires. 6.2.2. Reactor operated by the ILL As indicated earlier, the feared severe accidents are meltdown in air and BORAX (explosive type of reactivity accident). The ILL has thus presented in its CSA report the accident management measures aiming at guaranteeing: core cooling before and after the fuel becomes damaged; cooling of the spent fuel elements in the pool ; containment after fuel damage, that is to say control of environmental releases. Identification of the factors potentially hindering accident management and of the resulting constraints The ILL considers that the following factors can aggravate accident management: an earthquake, which could have an impact on the means of communication (the current PCS is designed to the SSE earthquake); flooding to a level of 216.2 m NGF, which would render the current PCS unavailable, as it is designed to a level of 210.5 m NGF; combined earthquake and flooding. The ILL indicates that it has particular operating instructions dedicated to the management of the facility in the event of an earthquake or flooding. The analysis of the resistance of the structures and equipment in the event of an earthquake, flooding or the two combined is presented in the "earthquake" and "flooding" sections of the present report. The ILL has undertaken to assess the possible impact of the industrial environment and the communication routes on the emergency management means. Existing severe accident management measures As mentioned above, severe accident management requires management of cooling and containment. ILL considers that the management of core cooling before damage occurs relies on: controlling the water inventory in the pile block above the natural convection valves;
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