ANNUAL RESULTS 2020

Strategy and investments ESG Renewables Regulated FLAMANVILLE 3 EPR (1,650 MW) (1/2) France Generation and supply Consolidated sales Operational data and markets CONSTRUCTION PROGRESS In October 2020, ASN and Senior Civil Servant for Defense and Safety gave their approval for the fuel arrival on site. Following this authorisation, the first fuel assemblies were warehoused in the EPR's Fuel Building UPDATE ON SECONDARY CIRCUIT WELDS Penetration welds In a letter dated 19 June 2019, the French Nuclear Safety Authority (ASN) asked EDF to rework, before commissioning, the eight VVP (1) penetration welds on the Flamanville EPR reactor containment building that deviated from the "break preclusion" reference document. EDF also decided to rework four ARE (2) penetration welds. The scenario retained by EDF for reworking the penetration welds (VVP and ARE) is the use of remotely-controlled robots, designed to conduct high-precision operations within the pipes in question. This technology has been developed for the fleet in operation. The ASN approved the VVP weld repair process in March 2021 and the repair works have started. The qualification of the ARE weld repair process is underway, with the goal of works taking place at the end of the second half of 2021. This process is an adaptation of the one used for VVP penetration repairs. Other welds In addition, the technical investigation into reworking the welds located in the Main Secondary Circuit (Circuit Secondaire Principal) with quality shortfalls and/or not complying with the requirements of the break preclusion reference document defined by EDF is ongoing. The ASN gave its agreement in July 2020 for the repair of a first batch of five welds, then in November for the repair of a second batch of two welds and in April 2021 for the repair of a third batch of six welds. The five welds in the first batch and the two of the second batch were repaired and the ASN control is ongoing. Repairs on the six welds in the third batch are in progress. Repairing the penetration welds is the main challenges on the critical pathway of the project. However, repair work on other welds of the Main Secondary Circuit and other activities underway on the worksite are also creating additional risk to the schedule and the target cost on completion for the reactor. (1) Steam discharge pipework circuit (2) Water supply circuit for steam generators eDF SALES FIRST QUARTER 2021 18

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