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On 10 April 2018, EDF informed the French Nuclear Safety Authority (Autorité de Sûreté Nucléaire) of a significant event relating to the detection of deviations during checks of certain welds of the main secondary circuit at the Flamanville EPR, and ordered a report analysing the causes and nature of these deviations.

On 3 December 2018, EDF submitted to ASN a technical file presenting the procedures for repairing and upgrading the main secondary circuit welds, which had showed deficiencies with respect to the break preclusion requirements, as well as for the specific justification method for the 8 welds located in the reactor containment building structure.

completion of the weld upgrade of the main secondary circuit. a new series of qualification tests of the installation before loading the fuel into the reactor.

Start of operations to repair penetration welds on the main secondary circuit, using remotely-controlled robots, following ASN agreement. Pending ASN decision on the treatment of three nozzles on the main primary circuit.

Start of operations to repair penetration welds on the main secondary circuit, using remotely-controlled robots, following ASN agreement. Pending ASN decision on the treatment of three nozzles on the main primary circuit.

ASN approval of the repair process of 8 penetration welds on the main secondary circuit using remotely-controlled robots. UK: temporary restart of Hinkley Point B and Hunterston B before final shutdown.

Flamanville 3: continuation of the action plan on the welding of the main secondary circuit. Successful integration of Framatome.

-No objection in principle from ASN to carry on with EDF solution (retainer clamp) for the processing of the design deviation of the 3 nozzles on the main primary circuit (4) "Grand Carénage. Four ten-year inspections (fourth 10- year inspection) completed and three underway.

-No objection in principle from ASN to carry on with EDF solution (retainer clamp) for the processing of the design deviation of the 3 nozzles on the main primary circuit (4) "Grand Carénage. Four ten-year inspections (fourth 10- year inspection) completed and three underway.

-No objection in principle from ASN to carry on with EDF solution (retainer clamp) for the processing of the design deviation of the 3 nozzles on the main primary circuit (4) "Grand Carénage. Four ten-year inspections (fourth 10- year inspection) completed and three underway.