Les cahiers de l’ASN #02 - Conditions for the continued operation of EDF’s 900MWe reactors

Complementary safety improvements required by ASN: • Completion of deployment of the “hardened safety core”, protection against extreme hazards • Steam generator ultimate auxiliary feedwater system • Injection at reactor coolant pump (RCP) seals • Management of contaminated water Submission of the periodic safety review concluding report to ASN by EDF Public inquiry ASN resolution on the continued operation of the reactor concerned Year N Year N+1 Year N+2 10-yearly outage Year N-1 Year N+4 Year N+5 Year N+3 Major part of the checks on compliance with the safety baseline requirements: • Primary system hydrostatic pressure test • Containment test • Verification of safety-important systems or environmental protection-important systems • Correction of the detected deviations Major part of the safety improvements: • Additional spent fuel pool cooling system • Ultimate heat sink system • Reduction of iodine releases in accident situations • Improved protection against certain hazards (fire, explosion, flooding, earthquake, etc.) Conditions for the continued operation of EDF’s 900MWe reactors • 7