Energy — 2026-11-09

Zaporizhzhia Nuclear Plant Loses All External Power for 27th Time in War, Forced Onto Diesel Generators

BLUFZaporizhzhia's dependence on a single 330 kV line means another complete loss of off-site power will likely occur within the next 30 days, and any outage lasting beyond the roughly two-week diesel window would directly threaten reactor cooling.

The IAEA stated on X that the Zaporizhzhia plant lost its sole remaining external line, Ferosplavna-1, early Sunday, forcing reliance on emergency diesel generators for reactor cooling and safety functions 12. Director General Grossi termed it the 27th such event of the conflict, and the IAEA said the cause and location were not yet known 23. Plant staff told the IAEA that diesel reserves could run a limited number of generators for about two weeks 14. Kyiv Independent reported the IAEA confirmed restoration about 10 hours after its announcement, and ANSA also cited an IAEA post on X reporting power restored 34. Ukrainian Foreign Minister Sybiha called for sanctions on Rosatom, and Anadolu reported Russia had not responded 1.

Analysis
Zaporizhzhia now relies on a single 330 kV line, Ferosplavna-1, after the Dniprovska main line failed. Two lines were available in June, and eight further blackouts since the 19th outage show the pattern recurring. The IAEA will likely report a 28th complete loss of off-site power at Zaporizhzhia between November 10 and December 9, 2026. Diesel covers only a limited number of generators for about two weeks, so a prolonged outage, not the roughly 10-hour one just ended, would test cooling. Confidence is high, based on consistent IAEA reporting of the single-line dependency and the repeated outages. The IAEA's own post is the primary source, the four outlets add little independent reporting, and the cause of this event is unknown. The fragility may instead reflect aging equipment, making recurrence depend more on repair quality and weather than on military decisions. A 28th loss would push the IAEA, European governments and Kyiv toward diesel resupply, repair ceasefires and Rosatom sanctions. Without one, that pressure fades and the Abu Dhabi talks on November 10-11 take priority.
5 sources
  1. Ukraine's Zaporizhzhya nuclear plant loses all external power for 27th time: UN nuclear watchdog - Anadolu Agency
  2. Ukrainian nuclear plant switches to generators after losing final power line - Yahoo News
  3. Power to Zaporizhzhia nuclear power plant cut, restored, IAEA says - Kyiv Independent
  4. Aiea, ripristinata l'alimentazione elettrica alla centrale nucleare di Zaporizhzhia - ANSA
  5. IAEA post on X reporting Zaporizhzhia NPP lost its last external power line, Ferosplavna-1, and later that power was restored (27th loss of off-site power) - IAEA (official X account)

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