Romanian authorities plan to conduct a controlled sinking of four barges loaded with rocks in the Bala branch of the Danube to redirect more water to the Cernavodă Nuclear Power Plant and prevent the shutdown of its only operating reactor unit.
The operation is scheduled to begin on August 5 after 2:00 p.m. The barges are intended to form a temporary underwater dam and divert part of the flow from the Bala branch to the Old Danube, from where water enters the nuclear power plant’s cooling system. Authorities expect to raise the water level near the plant by 10–12 cm.
Currently, only Power Unit No. 2 is operating at “Cernavodă.” The first of the two reactors was shut down last week due to critically low water levels in the Danube. Under normal conditions, the plant’s two units account for about one-fifth of Romania’s electricity production.
Before flooding the barges, the Romanian military carried out a controlled demolition of part of the Pirjoaia underwater rock formation, which had been hindering the redistribution of the river’s flow. Following this intervention, the drop in water levels near the plant temporarily ceased. Previously, the Danube’s water level in this area had been falling by approximately 2–3 cm per day.
As of the morning of August 5, the water flow at the Danube’s entry into Romania was approximately 1,450 cubic meters per second. By August 7, this figure could drop to 1,400 cubic meters per second—nearly one-third of the long-term average for August, which stands at 3,900 cubic meters.
As early as August 1, representatives of the National Administration “Waters of Romania” warned that without emergency measures, the second power unit would be able to operate at its maximum capacity for only four to five days. If the water level drops below operational thresholds, the reactor will be shut down in a controlled manner in accordance with safety procedures.
At the same time, dredging operations are continuing in the Old Danube–Bala Branch section. Specialists must remove some of the debris left over from the explosion and secure the submerged barges, as the current could displace them and reduce the effectiveness of the temporary dam.
Romania has declared a state of energy readiness for August. Due to reduced output at nuclear power plants and other power stations, the country has increased electricity imports and called on businesses, government agencies, and the public to reduce consumption during peak-load hours.
The critically low water level of the Danube is causing problems not only for Romania. The Paks Nuclear Power Plant in Hungary has also sharply reduced production: three of the four turbines were shut down, and the remaining one was operating at only a fraction of its capacity.
