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https://www.carbonbrief.org/factcheck-how-nuclear-gas-wind-and-solar-power-are-affected-during-heatwaves
Factcheck: How nuclear, gas, wind and solar power are affected during heatwaves - Carbon Brief
Saved at: August 5, 2026 at 06:22 PM
View this saveFactcheck: How nuclear, gas, wind and solar power are affected during heatwaves - Carbon Brief
Saved at: August 16, 2026 at 10:04 AM
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このページは、気候変動によって強まりつつある熱波が、核エネルギー、ガス、風力、太陽光などの発電に及ぼす影響を分析しています。2026年の夏、ヨーロッパの一部では気温が40℃を超え、核炉の運転停止、ガス発電の効率低下、風速の減少が見られました。特にフランスでは、日々の電力需要が熱波中に約20％増加し、発電が逼迫し電気料金が上昇しました。核発電は特に影響を受けやすく、フランスでは熱波中に3基の核反応炉が停止し、発電量が約9％減少しました。ページでは、誤解を招く情報の中で、主要な発電源が過酷な条件下でどのように対応しているかが詳述されています。
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このページは、気候変動により熱波が増加し、その影響で世界の電力源がどのように影響を受けているかを検討しています。2026年6月と7月にはヨーロッパの一部で気温が40度を超え、核反応炉が停止し、ガス発電所の効率が低下、風速が減少しました。特にフランスでは、核発電が電力の約70%を占め、熱波の影響で3基の原子炉が停止し、発電量が9%減少しました。このように、すべての電力源が異なる影響を受ける中、風力や太陽光の「不安定性」が指摘されがちですが、ガスや核の影響も無視できません。夏の間、電力需要が急増し、電気料金が上昇することもあり、発電と需要のバランスが求められています。
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Home Topics Energy Nuclear
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Home Energy Nuclear
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A similar story is true across various countries in Europe. Low river levels on the Danube have hit nuclear reactors in Romania , Hungary and Serbia this summer, while a Swiss nuclear reactor shuttered due to high river temperatures. It is nuclear plants using river water to cool their reactors that are most significantly affected by heatwaves and droughts. These make up 14% of the global fleet. Around 60 of the world’s 440 river-cooled reactors are located in France, with a further seven across Europe.
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A similar story is true across various countries in Europe. Low river levels on the Danube have hit nuclear reactors in Romania and Hungary this summer, while a Swiss nuclear reactor shuttered due to high river temperatures. It is nuclear plants using river water to cool their reactors that are most significantly affected by heatwaves and droughts. These make up 14% of the global fleet. Around 60 of the world’s 440 reactors use once-through river cooling, of which eight are in France.
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According to data company Montel , on Monday 3 August, around 2.44GW or 40% of south-east Europe’s nuclear capacity was offline due to drought in the Danube. Similarly, on Monday, as much as 12% of the French nuclear fleet was offline due to heat-related reasons, although that had been expected to drop to 7% by Tuesday.
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However, nuclear power’s exposure to heatwaves can prove particularly challenging given the large capacity of individual plants and the central role it plays in certain nations’ energy systems. For example, Romania’s only nuclear power plant, at Cernavodă , is responsible for 20% of the nation’s electricity generation. Therefore, the impact of low river levels in the Danube is having a particularly acute impact on Romania’s energy security.
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