Koeberg's unit one is back on the electricity grid after almost a year and long delays. Its three steam generators had to be replaced to extend Koeberg's lifespan for another 20 years.

Fin24 reports that Eskom confirmed that the unit had been successfully synchronised to the electricity grid on Saturday night.

Its three steam generators needed to be replaced as part of Eskom's application for a licence to operate the nuclear plant for another 20 years.

Koeberg was designed to be operated for only 40 years.

Its licence from the National Nuclear Regulator expires in July 2024.

Full Fin24 report