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Koeberg Unit 1 returns to service after shutdown

Published

Eskom said Koeberg Unit 1 is stable and synchronised to the grid after recovery work. The unit shut down automatically on 16 October 2026 during testing linked to the planned maintenance outage of Unit 2.

Eskom said the 400 kV and 24 kV breakers of Unit 1 opened automatically during an electrical disturbance. It said a conservative protection relay setting contributed to the response. Eskom said the protection system worked as designed to shut down the unit safely.

Eskom said there was "no impact on nuclear safety". It added that Unit 2 remains in planned maintenance. Eskom made the statements in posts on X on Thursday.

Key facts

Who
Eskom (power utility that operates Koeberg Power Station)
What
Eskom reported that Koeberg Unit 1 returned to service after recovery activities. The unit had been automatically shut down on 16 October 2026 during testing linked to the planned maintenance outage of Unit 2; Eskom said a conservative protection relay setting contributed and there was "no impact on nuclear safety".
When
22 October 2026
Where
Koeberg, Western Cape
Status
Reported

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