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U.S. Think Tank Recommends European Nuclear Power Adjust Cooling Configurations to Address High Temperatures and Drought

The U.S. Boston-based think tank Clean Air Task Force (CATF) recently stated that extreme heat and drought are placing new pressure on Europe's energy infrastructure, with nuclear power plant operations also affected. The organization believes the nuclear industry needs to place greater emphasis on climate resilience in energy planning and assess the impact of different cooling configurations on long-term plant operations. CATF noted that for nuclear power plants, temperature changes, water resource availability, environmental conditions, and related regulatory requirements over the coming decades could all affect unit operations. The selection of cooling schemes for nuclear power plants should be determined based on site-specific conditions, including local water resource availability, environmental regulations, geographical conditions...

2026-09-03

Czech nuclear power plants largely unaffected by summer heat and drought

The Czech State Office for Nuclear Safety (SÚJB) stated on August 26 that this summer's heat waves and drought only caused a slight decline in electricity generation at the Temelín and Dukovany nuclear power plants, without leading to reactor power reduction or raising nuclear safety concerns. Currently, both plants meet the conditions for safe operation, including adequate cooling and water supply guarantees. SÚJB noted that some European nuclear power plants reduced output or temporarily shut down during high-temperature periods, mainly due to their cooling methods. Some plants use once-through cooling, making their operation directly affected by river water temperature and flow rate. When water temperatures rise and river flows are low, plants may reduce output due to environmental discharge limits...

2026-08-27

Danube Water Levels Recover, Paks Nuclear Power Plant Expected to Resume Full-Capacity Operation

According to Hungarian sources on August 19, Peter Magyar stated that due to the recovery of Danube water levels, the Paks Nuclear Power Plant is expected to resume full-capacity operation by next weekend. Magyar noted that starting from Friday, August 28, the Paks Nuclear Power Plant will be ready for full-capacity operation. The recent rise of 15 to 20 centimeters in Danube water levels has created conditions for the plant to restore its output and has also eliminated the need for operators to shut down turbines again. Relevant experts plan to restart the turbines that have not yet resumed operation as soon as possible. Previously, due to historically low Danube water levels, the operation of the Paks Nuclear Power Plant, which relies on river water for cooling, was affected, and the plant's output once dropped to approximately 10% of full capacity.

2026-08-20

Unit 2 of Romania's Cernavoda Nuclear Power Plant Still at Risk of Shutdown

Ionel Scrioșteanu, State Secretary of Romania's Ministry of Transport and Infrastructure, stated that Unit 2 of the Cernavoda Nuclear Power Plant is currently still in operation, but the risk of shutdown has not been eliminated. On August 8, Romanian authorities took emergency measures by sinking four fully loaded barges into the Danube River to raise local water levels, increasing the water intake into the plant's cooling water system to ensure the cooling needs of the reactor units. Scrioșteanu said on social media that the related actions have achieved positive results, allowing Unit 2 of the Cernavoda Nuclear Power Plant to continue operating...

2026-08-11

Czech nuclear safety officials say domestic nuclear power plants have sufficient cooling water for both existing and new units

Droughts across parts of Europe are affecting the operation of some nuclear power plants. Due to low water levels and flow rates in the Danube River, two reactors at Romania's Cernavodă Nuclear Power Plant have been shut down, and Hungary's Paks Nuclear Power Plant also faces the risk of a complete shutdown. Štěpán Kochánek, Chairman of the Czech State Office for Nuclear Safety (SÚJB), stated that plant operators should not be allowed to continue operating units at full power when cooling water is insufficient, and that related shutdown measures are conservative actions predefined in operating procedures. Kochánek explained that reactor shutdowns are not an unusually rare operation. Unit shutdown typically involves gradually reducing reactor power, inserting control rods, and bringing fission reactions to a minimal level or complete cessation. After shutdown, the reactor still requires cooling, but the demand for cooling water volume and capacity is significantly lower than during full-power operation. He noted that this process shares similarities with planned outages such as refueling overhauls and is a standardized procedure that operators should master.

2026-08-05

Low Danube Water Levels Impact Nuclear Power Plant Operations in Romania and Hungary

On August 4, amid persistently low Danube River water levels, Romania was rushing to build temporary dikes to divert more river water toward the Cernavodă Nuclear Power Plant to secure cooling water for its remaining operational reactor. Meanwhile, Hungary stated that the only still-operating turbine unit at the Paks Nuclear Power Plant was running in a safe condition. Both Hungary's Paks Nuclear Power Plant and Romania's Cernavodă Nuclear Power Plant rely on Danube River water for cooling. Recently, the Danube's water level dropped to historic lows, leading to a significant decline in nuclear power output in both countries. Budapest and Bucharest have had to increase electricity imports and call on residents and businesses to reduce consumption to ease grid pressure...

2026-08-05

Krško Nuclear Power Plant Operates at Full Capacity; Low Sava River Water Level May Affect Unit Output

Slovenia's Krško Nuclear Power Plant continues to operate at full capacity, but due to low water levels and elevated water temperatures in the nearby Sava River, a reduction in reactor power cannot be ruled out in the future. The plant stated that it is utilizing its cooling tower system and operating in compliance with environmental restrictions related to the Sava River. Due to insufficient recent precipitation, the Sava River's water level remains low, and river water temperatures are also staying in a higher range. Plant management also noted that increased cooling demands have already had a certain impact on the unit's power generation efficiency. Krško Nuclear Power Plant has notified relevant authorities in Slovenia and Croatia that if environmental restrictions are further tightened, it may be necessary to...

2026-08-05

Danube at Record Low, Hungary's Paks Nuclear Plant Faces First Full Shutdown in 44 Years

On August 2, Hungarian authorities stated that the Paks Nuclear Power Plant may halt electricity generation due to the Danube River dropping to a historic low. This is the country's only nuclear power plant, with an installed capacity of approximately 2 gigawatts, generating nearly half of Hungary's total electricity output. The Paks Nuclear Power Plant draws water from the Danube for cooling. Due to persistent high temperatures and insufficient rainfall, the Danube's water level has been continuously declining recently. Hungarian water authorities predict that the river, which flows from Germany to the Black Sea, will see further drops in water levels in the coming days. As of 18:37 GMT on August 2, the Paks Nuclear Power Plant's output was only slightly above 10% of its installed capacity. Péter M...

2026-08-03