The fifth periodic safety review In 2023, EDF sent ASN the envisaged guidelines for the generic phase study programme for the fifth periodic safety review of the 900 MWe reactors. ASN will issue a position statement on these guidelines in 2024, after consulting the Advisory Committee of Experts for Nuclear Reactors (GPR). The ASN position statement will also be submitted to the public for consultation in autumn 2024. The 1,300 MWe reactors The third periodic safety review At the beginning of 2015, ASN issued a position statement on the generic aspects of the continued operation of the 1,300 MWe reactors beyond thirty years of operation. On this occasion, ASN underlined the importance of the modifications made by EDF following their third periodic safety review. Within the framework of this review, EDF is notably deploying material and operational modifications in order to mitigate the consequences of an SG tube break accident, to prevent the occurrence of severe accidents with early loss of containment, and to reduce the risk of uncovering the fuel assemblies present in the spent fuel pool. With regard to hazards, EDF is modifying its installations in order to guarantee operation of the equipment needed for the safety of these reactors in the event of a heatwave, to protect the safetyimportant equipment against projectiles created by strong winds and to prevent the risks of explosion further to an earthquake. To help conclude the generic phase of this review, ASN issued additional requests in 2021 applicable to all the 1,300 MWe reactors, with the aim of reinforcing their safety. The third ten-yearly outages for the 1,300 MWe reactors will run until 2024. The fourth periodic safety review In July 2017, EDF produced a file giving the guidelines envisaged for the generic phase of the fourth periodic safety review of the 1,300 MWe reactors. In 2019, ASN issued a position statement on these guidelines, after involving the public and consulting the GPR: ASN considered that the general objectives set by EDF for this review are acceptable in principle. They aim more specifically to avoid the need to implement population protection measures for design-basis accidents, and in the case of severe accidents, to try to have population protection measures that are limited in space and time. With regard to the safety of the spent fuel pool, ASN asked EDF to set an objective of no uncovering of the assemblies and to eventually return the installation to and permanently maintain it in a state without pool water boiling. The modifications associated with this periodic safety review will also incorporate those linked to deployment of the “hardened safety core” (see point 2.4.5). In 2023, ASN continued with the examinations performed for the generic phase of this periodic safety review. After primarily looking at methods, the examinations in 2023 concerned the application studies, in particular concerning the containments, the studies of accidents with or without core melt, evaluation of the robustness of the installations to hazards and the methods for implementing certain systems involved in the “hardened safety core”. EDF also continued the studies needed to update the regulation reference files for the main primary and secondary systems; this update is particular in that the design hypotheses were initially produced for 40 years of operation. Bugey 2 Bugey 3 Bugey 4 Bugey 5 Tricastin 1 Gravelines 1 Tricastin 2 Tricastin 3 Gravelines 2 Dampierre 1 Gravelines 3 Saint‑Laurent B1 Dampierre 2 Saint‑Laurent B2 Blayais 1 Dampierre 3 Tricastin 4 Gravelines 4 Dampierre 4 Blayais 2 Chinon B1 Cruas 1 Blayais 4 Blayais 3 Chinon B2 Cruas 3 Paluel 1 Cruas 2 Paluel 2 Gravelines 5 Cruas 4 Saint‑Alban 1 Paluel 3 Gravelines 6 Flamanville 1 Paluel 4 Saint‑Alban 2 Flamanville 2 Chinon B3 Cattenom 1 Cattenom 2 Nogent 1 Belleville 1 Chinon B4 Belleville 2 Nogent 2 Cattenom 3 Penly 1 Golfech 1 Cattenom 4 Penly 2 Golfech 2 Chooz B1 Chooz B2 Civaux 1 Civaux 2 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1990 1991 1992 1993 1996 1997 1999 1,800 MWe 1,800 MWe 7,200 MWe 6,300 MWe 1,800 MWe 3,600 MWe 6,200 MWe 4,800 MWe 6,100 MWe 4,800 MWe 2,600 MWe 3,900 MWe 1,300 MWe 1,300 MWe 1,300 MWe 1,450 MWe 2,900 MWe 1,450 MWe Total power Date of 1st criticality Source: ASN. 1,300 MWe 1,450 MWe 900 MWe Time-line of first criticality of the French nuclear power reactors ASN Report on the state of nuclear safety and radiation protection in France in 2023 315 • 10 • The EDF Nuclear Power Plants 10 05 15 08 11 04 14 06 07 13 AP 03 02 09 12 01
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