Hungary's Paks Nuclear Plant Set to Restart as Danube Levels Recover
Prime Minister Magyar says one turbine could come back online Monday evening, offering partial relief after a heat-driven crisis that forced blackout contingency planning.
Hungary expects its only nuclear plant to resume electricity generation as early as Monday (2026-08-10) evening, Prime Minister Peter Magyar said, after rising Danube water levels allowed engineers to prepare a restart of one turbine at the 2 GW Paks facility.4
Paks accounts for roughly half of Hungary's domestic power generation, and its partial shutdown forced the country to lean on gas-fired capacity and cross-border imports to prevent blackouts during an extreme heat event. A grid that had to clear a crisis through demand suppression and imports rather than generation cannot treat those measures as indefinitely available.2
The heat peaked on Thursday (2026-08-06), when temperatures hit a record 43 degrees Celsius. Montel reported that the day was declared "critical" by Hungarian authorities, with a 400 MW gas-fired outage compounding the stress on the system. The nuclear plant's 240 MW unit that had remained operational held stable, but reduced generation combined with surging cooling demand left the grid with very little margin.3
The Danube had fallen low enough that thermal discharge requirements for Paks cooling could not be met, triggering the partial shutdown. By Thursday (2026-08-06), the river at Paks had risen 7 cm above its recent minimum, which Montel described as putting the last operating unit in a "reassuring" position. That incremental rise was enough for Magyar to signal a broader restart within days.3
Hungary avoided price spikes during the worst of the crisis, according to a Montel EnAppSys analyst, through a combination of voluntary demand reductions by industrial and commercial consumers and ramped-up gas generation and imports. That balancing act carried a cost: gas burn rose precisely when European gas markets were already elevated. ICE Endex TTF front-month was trading at €55.50/MWh at 08:15 UTC on Monday (2026-08-10), flat on the session, though a prolonged Central European heat emergency has kept the market attentive to regional demand signals.2
The government had also unveiled a EUR 2.2 billion support package for households and businesses hit by the heat and the energy crunch, Magyar announced on Thursday (2026-08-06). The package signals that the fiscal cost of the crisis has already registered at the political level, even before any full accounting of grid management costs.3
Magyar's Monday (2026-08-10) statement about blackout response planning puts the contingency on the public record for the first time. Hungary has dependencies that make supply disruptions harder to absorb than for larger grid systems. The country draws heavily on Paks for baseload, and its gas supply chain carries its own political complications: Montel reported in May (2026-05-15) that Hungary's plan to ban the sale of gas transit capacity to Ukraine in the third quarter was characterised by analysts as a political decision rather than one driven by supply constraints.1
That geopolitical dimension has not gone away. If the Paks restart encounters technical delays — turbine recommissioning after thermal shutdowns carries its own risks — Hungary would need to sustain elevated gas imports through a network where capacity allocation has become a point of diplomatic friction.1
For now, the immediate question is how much capacity the Monday (2026-08-10) restart actually restores. Paks has four units totalling 2 GW. Magyar's reference to a single turbine being switched on suggests the restart will be partial, with full restoration dependent on continued Danube recovery and technical checks.4,2
The broader signal for Central European power markets is that low river levels can remove baseload nuclear capacity precisely when it is most needed. The Danube's 7 cm recovery bought Hungary time. With heat events of comparable intensity still possible through August, grid operators and cross-border traders will be watching whether that cushion holds.3,4