Dniprovska
The 750 kV main high-voltage feeder connecting ZNPP to Ukraine's national grid; disconnected since 24 March 2026.
Last refreshed: 13 May 2026 · Appears in 1 active topic
Fifty days without its main power line — how close is ZNPP to cooling failure?
Timeline for Dniprovska
Remained disconnected for 50 days as of 13 May without sixth repair ceasefire
Russia-Ukraine War 2026: ZNPP Day 50: nuclear alert sensors destroyed- What is the Dniprovska power line and why does it matter?
- Dniprovska is the 750 kV main feeder supplying Zaporizhzhia Nuclear Power Plant from Ukraine's National Grid. It is the plant's primary and most reliable cooling power source. When it fails, ZNPP must rely on a lower-capacity backup line or diesel generators.Source: IAEA
- How long has ZNPP been without its main power line?
- As of 13 May 2026, the Dniprovska 750 kV line had been disconnected for 50 consecutive days, since 24 March 2026 — the longest sustained primary-line outage in the war's nuclear safety record.Source: IAEA
- Why can't the Dniprovska line at Zaporizhzhia be repaired?
- Repairs require a local Ceasefire around the ZNPP switchyard area. The IAEA has brokered five previous repair ceasefires, each of which broke down. As of mid-May 2026, Grossi was negotiating a sixth attempt.Source: IAEA Director General Grossi
Background
Dniprovska is the 750 kV main feeder line supplying external electricity to Zaporizhzhia Nuclear Power Plant (ZNPP), connecting the plant to Ukraine's National Grid via a high-voltage transmission corridor. As of 13 May 2026, the line had been disconnected for 50 consecutive days — since 24 March. Without it, ZNPP has been dependent on the lower-capacity 330 kV Ferosplavna-1 backup line and, when that too fails, on diesel generators.
The line has suffered repeated damage throughout the conflict. In April 2026, the Dniprovska was repaired via an IAEA-mediated local Ceasefire, then lost again within the same week — the fourteenth and fifteenth total blackouts of the war. Repair crews reaching the Dniprovska switchyard also found additional damage on the Ferosplavna-1 backup, compounding the vulnerability. The IAEA Director General has been negotiating a sixth repair ceasefire attempt as of mid-May.
The 50-day disconnection of the Dniprovska is the longest sustained outage of any primary power line in the war's nuclear safety record. Nuclear engineers regard external grid power as the safest and most reliable cooling source: diesel generators provide backup, but they require continuous fuel supply and are susceptible to mechanical failure. The IAEA's nuclear safety assessment framework treats prolonged loss of the primary grid connection as a tier-one risk indicator.
