Romania Extends Alert as Low Danube Keeps Cernavoda Reactors Offline

Romania has extended its state of alert over the Cernavoda nuclear power plant for another 30 days, as the low level of the Danube continues to keep the plant's two reactors out of service. According to Romania Insider, which credits the Agerpres news agency, the National Committee for Emergency Situations took the decision, and it was published in the Official Gazette on Wednesday, 28 October, as announced by the Energy Ministry.

The reasoning is plain. Water levels where the Danube enters Romania remain persistently low, and the reactors cannot be restarted during November. Cernavoda depends on the river for cooling, so a weak river means a weak power station. Unit 1 was shut down in a controlled procedure on 28 July because of the severe drought, and Unit 2 followed on 13 August for the same reason. Both have remained offline since.

Authorities have warned that insufficient power and energy reserves could trigger an electricity supply crisis during periods of peak consumption, which arrive as winter sets in. The Energy Ministry said that Transelectrica, the national grid operator, will take all necessary measures to keep the national power system running. The measures named include raising output from all available sources, securing electricity imports, or reducing consumption.

Emergency works and other measures to maintain the water flows and levels the plant needs will remain in place for as long as the alert lasts. Central and local public institutions may also be asked to provide additional support, depending on how the situation develops.

The story is a clear example of how climate stress reaches the energy system through water. Nuclear power is often described as low-carbon and reliable, yet it is only as dependable as the cooling water available to it. When a major river runs low for months, a country can lose a large share of its stable generation at the moment demand rises, and has to lean on imports, other plants or lower demand to fill the gap.

The article does not give river gauge readings or the share of Romanian electricity that Cernavoda normally supplies, so the scale of the shortfall is not quantified here. It also does not say how long the Danube may take to recover. What it does show is that the authorities are treating the risk seriously enough to renew emergency arrangements rather than hope for rain.

For Romania, and for other countries that rely on rivers to cool power plants, the lesson is about resilience. Diversifying the electricity mix, adding storage and flexible capacity, and planning for hotter, drier summers are no longer optional extras. They are part of keeping the lights on, and part of how an energy transition protects households and industry from the next dry season.

Why it matters

A power station that cannot run because the river is too low shows how closely climate, water and energy are linked. Romania's extended alert is a reminder that energy security now depends on planning for drought as carefully as for demand.