Following the connection to the grid, the reactor should produce 14 terawatt hours (TWh) of power until its first planned shutdown, which should happen mainly in 2026 and last "several months", the state-owned utility said.
EDF had previously indicated that fuel loading at Flamanville would take place in the first quarter of 2024.
The cost of the project, originally put at 3 billion euros when the project was announced in 2004, were hiked to an estimated 13.2 billion euros by the end of 2022 as repeated difficulties led to numerous delays and additional costs.
The reactor was originally scheduled to go into service in 2012.
EDF expects nuclear power generation in France in 2026 to be between 335-365 TWh, while confirming 2024 and 2025 targets of 315-345 TWh and 335-365 TWh, respectively.
