Romania Shuts Last Nuclear Reactor as Danube Hits 90-Year Low
A drought-forced reactor shutdown pushes southeast European power to €153.23/MWh, deepening a regional supply deficit already running at 4 GW below capacity.
Romania began shutting down its only remaining operating nuclear reactor on Thursday (2026-08-13) as record-low Danube water levels — the lowest in 90 years, oilprice.com reported — forced Nuclearelectric's hand, making it the latest in a string of nuclear outages across central and eastern Europe driven by the same drought. Romanian day-ahead power was at €153.23/MWh on Friday (2026-08-14), reflecting a supply squeeze gripping the southeastern flank of the European grid.5
The shutdown compounds a deficit that was alarming grid operators before it arrived. Montel reported that Romanian prime minister Ilie Bolojan, on Monday (2026-08-03), urged businesses and public institutions across southeast Europe to cut electricity use immediately, with regional power production already down more than 4 GW, or 16% of total installed capacity. Bolojan warned the region was growing dependent on imports to keep lights on.3
That 16% shortfall existed before Romania's last reactor went offline. The Danube at a 90-year low constrains both cooling water for nuclear plants and head pressure for run-of-river hydro. Nuclearelectric had no discretion once river conditions fell below safe operating thresholds. Other operators in the region appear to have reached the same point earlier in recent weeks.5
German front-month power stood at €134.41/MWh at Friday's (2026-08-14) 08:15 UTC fix, a high reading that reflects both local summer heat and transmission pressure from the southeast. ICE Endex TTF front-month was also at €60.29/MWh at the same fix, with the THE M+1 contract at €61.02/MWh.3,5
Wildfires added further stress. Europe entered summer already carrying the strain of devastating wildfires in France and Spain, according to reporting by Irina Slav's Substack on August 7 (2026-08-07), which cited the UN's call for faster movement away from fossil fuels. The fires have not caused direct power outages, but they have strained grid management across southern Europe precisely when the southeastern drought was stripping generation capacity.4
France's nuclear situation adds a separate layer of supply uncertainty. The European Commission on Tuesday (2026-05-19) launched a formal investigation into France's EUR 73 billion plan to subsidise the construction of six new nuclear reactors with a combined 10 GW of capacity, Montel reported. The probe examines whether the proposed support scheme constitutes permissible state aid under EU rules.1
Until the Commission rules, financing terms remain uncertain, which affects the timeline for any of the six reactors reaching commercial operation. France currently spends, per Economist reporting from May (2026-05-17), more than six times as much annually on pensions as on defence, borrowing heavily to cover the gap — context that makes a EUR 73 billion nuclear commitment politically exposed to shifting fiscal priorities.1,2
Slav's August piece cited Australia's Black Summer wildfires of 2019-20 as a comparison case, noting that Australian wildfire severity has not escalated progressively since that event — a data point that complicates deterministic framing around ever-worsening fire seasons. European grid infrastructure, built around river-cooled nuclear and Alpine hydro, carries concentrated drought exposure that a more distributed generation base may not face in the same way.4
The coal ETF COAL rose 2.00% to $24.98 in Thursday's (2026-08-13) US session, a directional signal that markets are pricing some thermal substitution for lost low-carbon generation in Europe.3
How long the Danube remains at crisis levels is the variable most worth tracking. If water conditions do not recover before autumn demand begins rising, southeast European countries will enter the heating season with nuclear capacity still offline and hydro reservoirs depleted. Romania's import reliance will test regional interconnector capacity, and tightness there feeds back into TTF and wider European power. The EC's timeline on the French nuclear probe moves more slowly, but its outcome shapes how much new dispatchable low-carbon capacity France can credibly promise before 2035.5,3,1