Romania Sinks Barges Into the Danube in Desperate Bid to Save Nuclear Power
Finn's Take· TL;DR- Romania submerged four rock-filled barges in the Danube to redirect water toward its nuclear plant, buying roughly nine extra days before shutdown.
- Extreme drought has forced shutdowns across Central Europe's nuclear plants, with Hungary's Paks operating at only 10% capacity due to low water levels.
- The crisis reveals nuclear plants' vulnerability to climate-driven heat and drought, undermining their role as Europe's reliable low-carbon power source.
A River Running Out of Time
In one of the most dramatic emergency engineering operations in recent European memory, Romania on Thursday, August 7, sank four rock-laden barges into the Danube River in a last-ditch attempt to keep its only functioning nuclear reactor alive. Romania raced to sink four barges laden with rock into the Danube River in an attempt to redirect water downstream toward a nuclear power plant, to buy more time before its second reactor is likely forced offline due to record-low water levels. The stakes could hardly be higher — for Romania or for the wider region.
The state-owned nuclear power plant accounts for about 20% of the country's electricity generation when fully operational and uses river water to cool its reactors. Extreme heatwaves and low rainfall across the region have left the Danube at record lows over the past week, forcing the shutdown of a reactor at Romania's Cernavoda nuclear plant last week. With one reactor already dark, the country is now fighting to prevent a total blackout at its most critical power source.
Engineering a Miracle — With a 10-Day Shelf Life
The four barges were loaded with rock that Romania's military blasted from the river using explosives near the Danube's Bala Canal. Once submerged, the barges will create an underwater barrier to redirect the water down the river's main channel and toward the Cernavoda plant. It is an audacious plan — but the window it buys is painfully narrow.
The plant's director Romeo Urjan said the Danube's water level had decreased about two centimeters from Wednesday to Thursday and that, without sinking the barges, the plant's second reactor would likely have to be shut down in five to six days. "If the installed barges bring surplus water ... instead of five to six days, we will talk about nine to 10 days of operation from today onward," he said. He added that the impact of the barges being submerged could take about a day to reach Cernavoda, since it's located around 60 kilometers downstream. Nine extra days. That's what all of this effort is buying — barely more than a week to find a longer-term solution.
A Crisis Bigger Than One Country
The Danube, Europe's second-longest river, which winds through 10 countries on its journey from Germany to the Black Sea, has fallen to record lows in Hungary. Water levels in Budapest sunk to 4 inches, shattering the previous record low of 13 inches set in 2018. The consequences are rippling across borders. Hungary's Paks nuclear power plant, which generates nearly half of the country's electricity and uses Danube water for cooling, is operating at roughly 10% capacity after low water levels forced all but one of its reactors offline.
In Moldova, which relies heavily on imported electricity, including from Romania, authorities have urged citizens to voluntarily reduce usage during peak hours. The Danube remains navigable, though many cargo ships are taking reduced loads because of the depth of the water. Danube cruise ships moored in Bratislava found the river level too low to travel back up to Vienna or down to Budapest. The river isn't just a power source — it is the economic and logistical spine of Central Europe, and right now it is barely functioning.
What the River Is Revealing — and What It Warns
The drought has also pulled back the curtain on history. Woolly mammoth bones have surfaced in Bulgaria, and around 200 German warships scuttled in 1944 are visible near Serbia's Prahovo — ghostly artifacts of a world the river once kept hidden. But these strange discoveries underscore a deeply unsettling reality. Nuclear plants promoted across Europe as the reliable, low-carbon backbone of the continent's electricity grid are specifically unreliable during the climate-driven heat and drought events that Europe is confronting with increasing frequency.
Temperatures across mainland Europe are forecast to be 2°C to 8°C warmer than normal through early August, and longer-term weather models support more rounds of high pressure — which may mean little drought-busting rainfall until later in the year. Romania's sunken barges may buy a few more days of power, but the deeper question — how Europe keeps its lights on as its rivers dry up — has no quick fix waiting downstream.