An application has been submitted to the nuclear regulator for a licence for a proposed new power station.
Horizon Nuclear Power said it was another “major step” in delivering the Wylfa Newydd power station on Anglesey in north Wales.
A “rigorous” 19-month programme of assessment will now be held, with the Office for Nuclear Regulation (ONR) granting a licence after 36 conditions and obligations have been met.
Anthony Webb, safety and licensing director of Horizon, said: “Today’s announcement marks a significant development in the maturity and growth of Horizon as we get ready to build and operate our lead site at Wylfa Newydd.
“We already have a proven technology, aligned with experienced leadership, and we are rapidly building the wider capability and organisation to help ensure success.
“Our focus will now be fully on providing the ONR with confidence in our ability to safely deliver this crucial project.”
Mike Finnerty of the ONR said: “This is the first licence application for a new nuclear power station since 2011, and over the past three years we have been engaged with Horizon, providing them advice on the licensing process and the robust requirements expected of a nuclear site licensee.”