Ferosplavna-1 330 kV line

The 330 kV Ferosplavna-1 line is the backup external power feed for the Zaporizhzhia Nuclear Power Plant (ZNPP). In the week of 17-22 April 2026, the plant lost all external power for the fourteenth and fifteenth times in the war. The main 750 kV Dniprovska line was repaired via an IAEA-mediated local Ceasefire then severed again. Repair crews simultaneously discovered new damage on the Ferosplavna-1 feeder 1.8 kilometres from the switchyard. As of 22 April, one external line was running.

Ferosplavna-1 was reconnected on 5 March 2026 under the fifth IAEA-brokered local Ceasefire, restoring partial redundancy after previous lines were lost. Since the 750 kV Dniprovska main line disconnected on 24 March, Ferosplavna-1 has been ZNPP's only external power source for extended periods. On 14 April, the line disconnected completely; emergency diesel generators ran for approximately 90 minutes before reconnection.

The line's route runs near the Dnipro River frontline, physically exposing it to the same artillery, drone, and incidental damage that severed the Dniprovska line. If Ferosplavna-1 is lost while the Dniprovska line is also down, all six reactor units would fall back to emergency diesel generators. Rosatom has confirmed the reactors cannot be restarted while fighting continues, and diesel fuel is finite. The IAEA has been attempting to broker a sixth Ceasefire specifically for Dniprovska repairs.