- 312 - With regard to the emergency management premises, the Local Strategic Management Command Posts (PCDL) of each entity are designed to the DBE, with the exception of the Comurhex premises, whose robustness was not studied. Moreover, the emergency management premises have a limited autonomy in the event of loss of the electrical power supply. ASN observes that the SET does not have its own PCDL, and would use the PCDL of Eurodif in the event of a severe accident. However, the availability of this PCDL in the event of an accident affecting Eurodif and SET simultaneously is not guaranteed. ASN will issue a requirement concerning this point. Fall-back premises designed to the DBE are also planned for should the control rooms be unavailable. However, the licensee does not specify in its report whether the fall-back premises will be equipped with filtration systems in the same way as the control rooms. ASN considers that the control of the facilities on the Tricastin site must be ensured from the control or fall-back premises until a lasting safe condition is reached. It will issue a requirement to this end. With regard to the intervention means, the site's personnel and material resources are geared to meet two simultaneous accidents in standard situations and three in exceptional situations, whereas the complementary safety assessment led to the envisaging of up to 6 simultaneous accident situations. ASN will issue requirements for the Tricastin site licensees to reinforce their material and organisational provisions to include accident situations affecting all or part of the site facilities simultaneously. Measures envisaged to reinforce the accident management capabilities AREVA states that the availability and functionality of the technical and human resources necessary for interventions in severe accident situations cannot be fully guaranteed in the event of a DBE-type earthquake. Emergency management such as it is planned in the PUI would very likely be disturbed by such lack of availability. The situation would be the same in the event of flooding, except that the slower kinetics of the event would allow the facilities to be made safe. Lastly, the combination of an earthquake and flooding would make intervention extremely difficult or even impossible, depending on the rate of rise of the water. The licensees plan conducting various studies relating to emergency management in the extreme situations studied for the CSAs, and concerning the following points in particular: alerting and communication means, coordination means necessary for emergency management, installation of emergency resources and new wells, mitigation means available to the FLS. On the other hand, the licensees do not decide on or make any commitments regarding the implementation of reinforcement provisions. ASN considers it essential that the Tricastin licensees reinforce their organisational and material provisions for severe accident situations. It considers that these reinforcements must take into account the consequences of any hazardous phenomenon that could occur on the Tricastin site and the neighbouring facilities, notably the Tricastin NPP (explosive, thermal, toxic, radioactive release phenomena, etc.). ASN will issue requirements regarding these points, focusing in particular on the emergency premises, material resources, means of communication and coordination between neighbouring licensees, including EDF. With regard to the joint emergency organisation project, AREVA envisages grouping safety/environment departments and skills and reinforcing the professionalisation of the emergency teams for the "shareable" functions (human resources, logistics, accident impact assessment, etc.). ASN considers that the people involved in emergency management, particularly with regard to the individual PUIs of the Tricastin site (reflex response sheets, scenarios, etc.), must have the necessary competence before they take up their function. The ASN inspectors will endeavour to verify this point during their field inspections.
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