365 Days and Counting: Koeberg Unit 2 Hits Major Milestone After Upgrades

Earlier this month, Eskom announced that Unit 2 of the Koeberg Nuclear Power Station had operated for 365 consecutive days without interruption following extensive technical upgrades.

The Milestone

Eskom said the unit has operated at an average Energy Availability Factor (EAF) of 99.4% since the major upgrades were completed, supplying around 946MW of electricity to the national grid.

“This milestone follows major upgrades to Unit 2, which returned to the grid on 30 December 2024 and has operated continuously since 9 March 2025,” said Eskom Group Executive for Generation Bheki Nxumalo.

“It showcases the strength of South Africa’s nuclear skills base. The successful installation of the new steam generators highlights the skill and dedication of the Koeberg team, engineers, technicians, operators, and support staff, who have worked tirelessly to ensure the unit runs safely and efficiently.”

The Impact

Koeberg Nuclear Power Station, located near Melkbosstrand in the Western Cape, serves Cape Town and the rest of the province by providing a local source of electricity.

It reduces the region’s reliance on power lines from coal-fired stations in northern areas.

“Nuclear power also produces electricity without greenhouse gas emissions, supporting a cleaner environment while keeping costs affordable,” Eskom said.

The power station also reinforces the national grid by serving as a stable anchor, helping to prevent instability and lowering the need for more expensive power stations.

What’s Next

The unit is currently projected to run continuously for 412 days before it is taken offline for planned maintenance on 26 April 2026.

While this duration is less than the previous record of 454 days set in 2022, Eskom stated that it highlights their success in reducing unplanned outages.

The upcoming scheduled maintenance is crucial for safeguarding recent investments and ensuring the unit’s reliability for the next 20 years.

The Bottom Line

365 days. 99.4% availability. 946MW of clean energy.

Koeberg Unit 2’s milestone is more than a technical achievement. It’s a testament to South Africa’s nuclear skills baseand a stable anchor for a grid that badly needs it.

{Source: BusinessTech}

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