Skip to content
Briefings are running a touch slower this week while we rebuild the foundations.See roadmap
Russia-Ukraine War 2026
13MAY

Zaporizhzhia loses external power twice in a week

4 min read
20:00UTC

Europe's largest nuclear plant lost external power for the fourteenth and fifteenth times of the war around 17 April, days after an IAEA-mediated ceasefire had restored the main 750 kV feeder.

ConflictDeveloping
Key takeaway

The paperwork runs through 2036; the plant runs on one external cable.

The Zaporizhzhia Nuclear Power Plant lost all external power for the fourteenth time of the war on or around Friday 17 April, and again days later on the fifteenth occasion 1. The main 750 kV Dniprovska line, disconnected since 24 March at 23 days on 14 April , was repaired during the week via an IAEA-mediated local ceasefire; the plant then lost power twice more. Repair crews on the 330 kV Ferosplavna-1 backup feeder found additional damage 1.8 kilometres from the switchyard. As of Wednesday 22 April, one external line was running. Rafael Grossi, the IAEA Director General, said the agency is negotiating a further ceasefire to repair the main feeder.

The operational trajectory and the administrative one now run in opposite directions. Rostekhnadzor, Russia's nuclear regulator, issued 10-year operating licences for ZNPP units 1 and 2 through 2036 earlier in April . The paperwork runs through the next decade; the physical plant runs on a single external cable. The 1.8 km Ferosplavna-1 fault widens the repair footprint beyond the previous cable-break scope, and the fortnightly pattern of outage and repair is not a stable operating regime for a nuclear plant under any framework.

The plant is in cold shutdown, which reduces the fuel-damage timeline of a total loss relative to an operating reactor. That floor is the argument against panic. The argument against complacency is duration: emergency diesel generators carried the site for roughly 90 minutes during the 13th incident, and every additional outage within a week narrows the margin before the diesels run into a ceasefire negotiation that has not yet been concluded. The operational gain of an IAEA-brokered ceasefire lasted less than a week; the next one will have to hold longer than that.

Deep Analysis

In plain English

The Zaporizhzhia Nuclear Power Plant (ZNPP) in Ukraine is the largest nuclear power station in Europe, with six reactors. Russia has occupied it since March 2022. The reactors are in a safe shutdown state: they are not generating electricity: but they still need a constant power supply to keep the cooling systems running that prevent the fuel from overheating. External power has been cut and restored 15 times since the war began. This week it happened twice in the same week. The main power line was repaired using a short ceasefire brokered by the IAEA, then the backup line was found to have new damage 1.8 km from the plant. As of 22 April, one external line was working.

First Reported In

Update #14 · Kyiv's Druzhba gambit unlocks €90bn loan

IAEA (via nuclear-news / GlobalSecurity)· 24 Apr 2026
Read original
Different Perspectives
NATO eastern flank (B9 + Nordics)
NATO eastern flank (B9 + Nordics)
The B9+Nordic Bucharest joint statement on 13 May reaffirmed Ukraine's sovereignty within internationally recognised borders and backed NATO eastern flank reinforcement; the summit accepted Zelenskyy's bilateral drone deal proposal as a structural alternative to the stalled US export approval pathway, treating it as a European defence architecture question rather than aid delivery.
IAEA / Rafael Grossi
IAEA / Rafael Grossi
Grossi is still negotiating a sixth ZNPP repair ceasefire with no agreement after 50 days of 750 kV line disconnection; the 3 May ERCL drone strike that destroyed environmental monitoring equipment represents a qualitative escalation in infrastructure degradation that the IAEA has documented but cannot compel either party to halt.
Péter Magyar / Hungary
Péter Magyar / Hungary
Magyar's incoming foreign minister pledged on 12 May that Hungary will stop abusing EU veto rights; the pledge is a statement of intent rather than a binding legal commitment, and Magyar's MEPs voted against the €90 billion loan as recently as April, while a planned referendum on Ukraine's EU accession preserves a downstream blocking lever.
EU Council and European Commission
EU Council and European Commission
The Magyar cabinet formation on 12 May removes the Hungary veto that had blocked the €9.1 billion first tranche since February; the Commission is now coordinating the three-document disbursement package for an early-June vote. The structural blocker is gone; the disbursement question is now scheduling, not politics.
Donald Trump / White House
Donald Trump / White House
Trump announced a 9-11 May three-day ceasefire with a 1,000-for-1,000 prisoner exchange attached, then called peace 'getting very close' on 11-13 May while Russia's 800-drone barrage was under way; his public framing adopted Russian diplomatic language without securing any Russian operational concession or verifying the exchange was agreed.
Vladimir Putin / Kremlin
Vladimir Putin / Kremlin
Putin told reporters on 9 May the war is 'coming to an end' while Peskov confirmed on 13 May that territorial demands are unchanged and Russia requires full Ukrainian withdrawal from all four annexed regions; the verbal accommodation costs Moscow nothing and conditions any summit on a pre-finalised treaty Kyiv cannot accept.