Zaporizhzhia nuclear plant loses external power again before grid link is restored
The Zaporizhzhia Nuclear Power Plant lost all external electricity at 02:36 on 8 November after its last operating 330 kV Ferosplavna-1 line was disconnected. Backup diesel generators supplied its own needs until the line was reconnected at 17:41, but Energoatom warned that the blackout created a critical nuclear and radiation safety risk. The cause and location of the cutoff were not established.
Key points
- External power was lost at 02:36 on 8 November after the 330 kV Ferosplavna-1 line was disconnected.
- The automatic attempt to reconnect Ferosplavna-1 was unsuccessful.
- Backup diesel generators supplied the plant's own needs during the blackout.
- External power was restored at 17:41 on 8 November by switching Ferosplavna-1 back on.
- The cause and location of the power cutoff were not established.
- IAEA representatives said available fuel could support the diesel generators for about two weeks.
- Energoatom called for the plant to return to Ukrainian control and its lawful operator.
Why it matters
The plant relies on external grid power for safety-critical systems. During the blackout, only backup diesel generators maintained its own supplies. Their failure or exhaustion could interrupt life-support and nuclear-fuel cooling systems and potentially cause a radiation accident. Although power was restored the same day, the station remained exposed to renewed outages while under Russian occupation.
What happened
At 02:36 on 8 November, the Zaporizhzhia Nuclear Power Plant lost all external electricity when its last operating 330 kV Ferosplavna-1 line was disconnected. An automatic reconnection attempt failed, and backup diesel generators supplied the station's own needs. At 17:41, Ferosplavna-1 was switched on again, restoring the plant's connection to Ukraine's energy system. The cause and location of the cutoff were not established.
How Ukrainian sources describe it
Ukrainian reporting emphasizes that the blackout was the 16th complete loss of external supply since the beginning of 2026 and identifies Ferosplavna-1 as the station's final connection to the Ukrainian grid. Coverage also centers on Energoatom's warning that the blackout created a critical nuclear and radiation safety threat and attributes the recurring outages to the plant's occupation.
How international sources describe it
International coverage highlights that the cause and location of the cutoff remained unknown, while the IAEA estimated that available fuel could operate the backup diesel generators for about two weeks. It also reports IAEA Director General Rafael Grossi's calls to reconnect the plant to the grid as soon as possible and increase diesel fuel reserves.
Where reporting differs
Sources disagree on the outage's sequence number. Most Ukrainian reports call it the 16th complete loss of external power since the beginning of 2026, while international reports variously describe it as the 27th or 28th such loss since the full-scale invasion began.
Background
Russian forces seized the plant in the early weeks of the full-scale invasion in February 2022, and all six reactors have been in cold shutdown since then. The station does not generate electricity. Its previous blackout occurred on 20 August, while the longest lasted from 23 September to 23 October 2025. Ukrainian energy workers restored Ferosplavna-1 on 7 September. IAEA representatives remain at the plant to monitor safety.