On April 17, 2020, EDF declared to ASN earthquake resistance defects in the equipment of the standby generator sets of reactors 1 and 4 of the Cruas nuclear power plant, of reactor 2 of the Chinon B nuclear power plant and of the reactor 1 of the Gravelines nuclear power plant. These faults concern: mounting faults in elastomeric pipe fittings of one of the two backup diesels of reactors 1 and 4 of the Cruas nuclear power plant and of reactor 2 of the Chinon nuclear power plant; corrosion defects in certain portions of the piping of one of the two backup diesels in reactor 1 of the Gravelines nuclear power plant. These faults were detected during checks carried out during the shutdown of these reactors. These checks were prescribed by ASN on February 19, 2019 in order to verify the compliance of the electrical sources.
ASN 20th May 2020 read more »