Hungary Weighs Full Paks Nuclear Shutdown

Hungary’s Paks nuclear power plant has reduced electricity generation after a second reactor bloc was taken offline as Danube River water levels continued to fall. With two of four blocs now down, the facility is operating at less than a quarter of its combined 2,000 megawatt capacity. Engineers implemented the latest output reduction overnight before the second bloc was shut on Saturday.

The drop in the Danube’s level is affecting the plant’s ability to draw sufficient cooling water, prompting operators to scale back production. The second shutdown follows earlier measures to reduce output as river conditions deteriorated, leaving the plant with limited available capacity.

Prime Minister Péter Magyar said the Paks plant could be powered down completely as soon as this weekend if Danube water levels keep declining. The key risk identified is the plant’s cooling intake, which depends on adequate river flow and levels to operate within safety parameters.

A potential full shutdown would temporarily remove a major source of baseload electricity from Hungary’s grid. With the plant already below a quarter of its capacity, further reductions would deepen the impact on domestic supply and could require increased reliance on other generation sources or imports.

The curtailed output at Paks has raised concerns about short‑term electricity security in Hungary and possible knock‑on effects for neighboring markets. Reduced nuclear generation can affect cross‑border electricity flows in southeast Europe, particularly during periods of high demand or limited alternative supply.

In response to the emerging situation, the European Commission has stated it is prepared to convene an ad hoc meeting of its Electricity Coordination Group. The aim would be to monitor developments at Paks and coordinate regional measures, if necessary, to support system stability and ensure continued power supply.

The timing and extent of any further shutdowns at Paks will depend on how Danube water levels evolve in the coming days. The plant’s current reduced operation underscores the sensitivity of nuclear generation to environmental conditions affecting cooling systems.

Authorities and system operators are focused on managing the near‑term balance between supply and demand while monitoring river conditions. The situation remains fluid, with the prospect of a full plant shutdown underscoring the importance of contingency planning and regional coordination for power security.