Full Breakdown
Romania Sinks Rock-Filled Barges to Keep Cernavoda Reactor Running Amid Record Danube Drought
8/7/2026, 11:50:47 PM
Core Event
On August 6 (2026) Romania postponed the planned submersion of four rock-filled barges in the Danube until the following day, citing unsafe conditions. The barges are being sunk one at a time to create an underwater barrier that redirects water toward the Cernavoda nuclear power plant, Romania’s only operating reactor. Plant director Romeo Urjan told Digi24 that, without the barges, the remaining unit could be forced to shut down within five to six days; the barges could extend the operating window to nine or ten days.
Background & Context
A prolonged heat wave and drought have driven the Danube’s flow in Romania to an all-time low of 1,400 m³/s, about a third of the typical August average. The river supplies cooling water to both Cernavoda and Hungary’s Paks plant. Low water levels forced the shutdown of one Cernavoda reactor last week and have pushed three of Paks’s four turbines into inactivity, leaving the Hungarian plant operating at just over 10 % of its normal capacity (? 240 MW).
Data & Statistics
- Danube flow in Romania: 1,400 m³/s (record low).
- Cernavoda’s two reactors normally supply ? 20 % of Romania’s electricity; one reactor is offline.
- Expected water-level rise from the barges: 10–12 cm, enough to extend reactor operation by up to four to five days.
- Hungary’s Paks plant now at ? 10 % (? 240 MW).
Official Statements & Responses
Prime Minister Ilie Bolojan announced a nationwide state of alert on July 31 and said the government has prepared a staged power-cut system for industrial consumers, though no cuts are expected for the next 5–7 days while the reactor remains online.
Nuclearelectrica executive Romeo Urjan called the barge operation an “extraordinary response” aimed solely at buying time for the reactor.
Hungarian Prime Minister Peter Magyar reported that the last turbine at Paks is operating safely after a brief 1.5 cm rise in water level averted an immediate shutdown.
ING Bank warned that while blasting rock and sinking barges may keep a reactor running for a few more days, the measures do not create new generation capacity or accelerate storage deployment.
Verbatim Quotes
- “That is an extraordinary response, but it should not be mistaken for an energy strategy,” — ING Bank
- “Every day the nuclear power plant remains operational beyond Wednesday or Thursday is a gain; one day of operation delivers efficiency more than three times the cost of this operation.” — Experts
On-the-Ground Reports
Local observers noted the Danube’s water level falling by about 2 cm from Wednesday to Thursday, exposing sandbanks. Military engineers used explosives to dislodge a large boulder, creating a temporary surge that halted the river’s decline for several hours.
Conflicting Reports & Gaps
Most sources cite a flow of 1,400 m³/s as the current Danube discharge in Romania, but a few reports list it as 1,500 m³/s. The discrepancy remains unresolved, and real-time measurements are not publicly available.
What’s Next
Romanian authorities will monitor the barge barrier over the next week, with impacts expected to appear one day after each submersion. If water levels remain insufficient, the staged industrial power-cut system may be activated. Hungary continues to rely on voluntary consumption reductions and increased imports to offset the curtailed output at Paks while awaiting any rain that could raise Danube levels.
