Ukraine's Zaporizhzhia nuclear plant offline from external grid for week

The Zaporizhzhia nuclear power station in southeastern Ukraine has operated without connection to the external electrical grid for more than seven days, forcing operators to rely entirely on backup diesel fuel supplies to cool reactor cores and maintain essential safety systems.

This marks the 27th occasion since Russia's full-scale invasion in February 2022 that the facility has been forced to switch to emergency power generation. Each disconnection, whether caused by military strikes on surrounding infrastructure or deliberate sabotage, underscores the precarious situation at Europe's largest nuclear complex.

The plant's dependence on finite diesel reserves during extended outages creates mounting pressure on maintenance crews tasked with keeping the facility safe. International nuclear regulators have repeatedly warned that prolonged reliance on backup generators increases operational risks and complicates efforts to sustain critical cooling and safety protocols.

Russia seized control of the Zaporizhzhia station in March 2022, though Ukrainian staff continue operating the facility under Russian military oversight. The recurring power disruptions have become a flashpoint in international discussions about nuclear security during active conflict and have prompted calls from the United Nations' atomic energy watchdog for measures to stabilize the plant's power supply.