* See glossary page 21 The schedule for the periodic safety reviews The 4th periodic safety reviews* for the 1,300 MWe reactors are scheduled by EDF to take place between 2027 and 2035. The twenty 1,300 MWe reactors entered service between 1984 and 1994. EDF has drawn up a schedule which includes the transmission to ASN of the conclusions of the 4th periodic safety reviews* of the reactors concerned. This schedule (below) was drawn up on the basis of the date of the previous periodic safety review*. Paluel NPP reactors 1 and 2 and Cattenom NPP reactor 1 were the first to undergo their 3rd periodic safety review* and they will therefore be the first reactors to undergo their 4th periodic safety review*. A heavy initial schedule With three reactors to undergo their periodic safety review* no later than 2027, the schedule for the first year of the 4th periodic safety review of the 1,300 MWe reactors represents a large volume of installations, whereas only one of the 900 MWe reactors was concerned in the first year of their review. This situation demands even greater preparation on the part of EDF for performance of the ten‑yearly outage inspections* which precede the issue of the review concluding reports. It is during these ten‑yearly outage inspections*, to be held in 2026 for Paluel reactors 1 and 2 and Cattenom reactor 1, that many of the checks and much of the work to improve safety included in the review are carried out. However, owing to their scale, it is impossible to deploy all the safety improvements during the ten‑yearly outage inspections*. Some of the work is in fact carried out several years later. In order to ensure that the improvements most important for safety are made as early as possible, ASN issued a position statement in 2023 regarding the work to be done during the ten‑yearly outage inspections* associated with the 4th periodic safety review of the 1,300 MWe reactors. THE PERIODIC* SAFETY REVIEWS UNTIL 2035 2027 • Cattenom 1 • Paluel 1 • Paluel 2 2029 • Saint-Alban 1 • Saint-Alban 2 2030 • Belleville 2 • Cattenom 2 • Flamanville 1 • Flamanville 2 • Nogent 1 • Nogent 2 • Paluel 3 • Paluel 4 2031 • Belleville 1 • Cattenom 3 2032 • Penly 1 2033 • Cattenom 4 • Golfech 1 2034 • Penly 2 2035 • Golfech 2 THE METHODS OF THE 4TH PERIODIC SAFETY REVIEW 10 • Les cahiers de l’ASN • January 2024
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