Full Breakdown
Romania Shuts Down Cernavoda Nuclear Plant Amid Record-Low Danube Levels
8/14/2026, 3:57:59 AM
Immediate Shutdown of Cernavoda Reactors
On 13 August 2026 Romania began a controlled shutdown of the second reactor at the Cernavoda Nuclear Power Plant, the country’s only nuclear facility. The plant’s two 706-MW units normally supply roughly one-fifth of national electricity. The shutdown follows the earlier disconnection of the first unit on 28 July 2026, leaving the plant completely offline for the first time since a drought-induced closure in 2003.
Background: Drought and Danube Water Levels
A prolonged heatwave across Europe has driven the Danube River— the sole cooling water source for Cernavoda— to historic lows. Copernicus analysis shows that nearly two-thirds of the river recorded flow rates the lowest for a July month in 34 years. The World Weather Attribution group attributes the severity of the drought to human-induced climate change.
Timeline of Key Actions
- 29 July 2026 – Photographs document attempts to divert Danube flow.
- 28 July 2026 – First reactor taken offline.
- 3 August 2026 – Romanian Navy detonated explosives to clear a rock obstruction.
- 12 August 2026 – Authorities announced alternative power sources and imports would cover the deficit.
- 13 August 2026 – Controlled shutdown of Unit 2 commenced.
Data & Statistics
- The two reactors generate about 20 % of Romania’s electricity.
- Danube flow fell below the 185 cm critical level required for normal operation (reported 12 August 2026).
- Romania allocated more than €2 million to engineering measures, including blasting a rock formation and sinking four barges loaded with rocks.
- The government asked carmakers Dacia and Ford to pause production until 19 August 2026 to reduce industrial demand.
- Hungary’s Paks plant, normally covering roughly one-third of national electricity, is operating at reduced capacity and plans to install a low weir and sink two 80-metre barges to raise water levels.
Official Statements & Responses
The Ministry of Energy said wind generation, electricity imports and limited coal-fired output would fully cover national demand during the outage and warned that large industrial users could face evening-hour consumption restrictions.
Hungary’s Prime Minister Péter Magyar announced construction of a low weir to permanently raise the Danube’s water level near the Paks facility and the positioning of two barges to create a temporary dam.
Verbatim Quotes
- “Maintaining both units in a safe shutdown state has no impact on nuclear safety parameters, including personnel, the environment and the population,” — Romania's Nuclearelectrica
Conflicting Reports & Gaps
Sources differ on the year of the plant’s previous drought-related shutdown. Most cite 2003, while one outlet mentions a shutdown in 2023. No source provides a definitive figure for the exact volume of water required for safe reactor cooling.
Impact on Energy Supply
With Cernavoda offline, Romania is increasing reliance on imported electricity and a 330-MW coal-fired plant to bridge the shortfall. Wind power is being dispatched where available, but hydropower output is also constrained by low river levels. The government’s emergency plan allows the transmission system operator to limit industrial consumption and cancel electricity exports if needed.
Regional Responses
Hungary has avoided a total shutdown of its Paks plant but faces similar Danube-level challenges. The low-weir project and barge-sinking strategy aim to sustain partial operation. Both countries underscore the vulnerability of water-cooled energy infrastructure to extreme heat and drought.
Why It Matters
The Cernavoda shutdown shows how climate-driven water scarcity can impair baseload electricity generation, forcing rapid shifts to fossil-fuel backup and cross-border imports. It highlights the need for climate-resilient cooling solutions and diversified energy mixes across Europe.
