Unit 4 at the Vogtle nuclear power station in the US state of Georgia has been synchronised and connected to the electric grid for the first time.
Georgia Power, majority owner of the Vogle nuclear station, said grid connection is another major milestone in startup testing for the Westinghouse-supplied AP1000 nuclear power plant, which reached first criticality on 14 February.
The company said operators will continue to raise reactor power for generation of electricity while performing tests at various power levels, ultimately raising power to 100%.