Ferosplavna-1 330 kV line
ZNPP's sole remaining backup power line; reconnected 5 March under the fifth IAEA ceasefire; sole feed as of 10 April 2026.
Last refreshed: 24 April 2026 · Appears in 1 active topic
New damage found 1.8 km from the switchyard — is Ferosplavna-1 still holding ZNPP together?
Timeline for Ferosplavna-1 330 kV line
Zaporizhzhia loses external power twice in a week
Russia-Ukraine War 2026Disconnected causing total power loss, then reconnected after 90 minutes
Russia-Ukraine War 2026: ZNPP blacks out for 13th time; diesel runs 90 minutesZNPP on sole backup line for 18 days
Russia-Ukraine War 2026- What is the Ferosplavna power line at the Zaporizhzhia nuclear plant?
- Ferosplavna-1 is ZNPP's 330 kV backup power line, reconnected on 5 March 2026 under the fifth IAEA Ceasefire. Since 24 March it has been the plant's only external power source after the main 750 kV Dniprovska line was disconnected.Source: IAEA Update 346
- What happens if Zaporizhzhia nuclear plant loses all external power?
- If Ferosplavna-1 is lost, all six ZNPP reactor units would fall to emergency diesel generators with finite fuel. Rosatom has confirmed no units can be restarted while fighting continues. This is the scenario the IAEA has been warning about since the 2022 occupation.Source: IAEA/Rosatom
Background
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.
