Zaporizhzhia nuclear plant suffers 16th blackout of 2026, falls back on diesel generators

The Russian-occupied Zaporizhzhia Nuclear Power Plant lost all external electricity at 2:36 a.m. local time on Sunday, November 8, forcing the facility onto emergency backup diesel generators, Ukrainian state nuclear operator Energoatom announced.

The outage — the 16th external power blackout recorded at the station in 2026 — followed the disconnection of the last operating 330-kilovolt overhead line, designated Ferrosplavna-1, from Ukraine's unified power grid. An automatic attempt to re-engage the line failed, Energoatom said.

All six reactor units at Zaporizhzhia, Europe's largest nuclear generating station, remain in cold shutdown. Even so, continuous external power is required to run coolant circulation pumps, cooling circuits and radiation sensors. Energoatom warned that reliance on diesel generators creates a severe risk of equipment failure, fuel exhaustion or cooling degradation that "could lead to a radiation accident."

Ukrainian military intelligence data indicates the station requires approximately 150 metric tons of diesel fuel per day to power generator arrays during a full grid disconnection. The Ferrosplavna-1 line suffered three separate outages in August alone; in June the plant endured an extended 65-hour blackout on emergency generators.

Safety concerns have been compounded by falling water levels in the station's primary cooling pond. Ukrainian intelligence recorded the pond dropping from 12.9 metres in July to 12.6 metres in late August, well below the 15-metre threshold needed for optimal operations.

Energoatom stated that "the systematic loss of external power is a direct consequence of the occupation of the ZNPP." A minimum staffing complement of approximately 1,150 technicians operates the facility's safety systems under Russian occupation, according to Ukrainian military intelligence.