For the 5 reactors currently in operation (Tricastin 2 et 4, Fessenheim 1, Gravelines 4, et Civaux 1), Autorité de Sûreté Nucléaire (ASN- Nuclear Safety Authority) in its Decision No . 2016- DC- 0572 of 18 October 2016, requested EDF to conduct controls before 18 January 2017. Consequently, in order to conduct these controls, EDF decided the following reactor outages.