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More French nuclear offline as heatwave persists

French nuclear output dropped 6.3 GW (14% of demand) across eight reactors on Monday due to a prolonged heatwave limiting cooling water availability. Environmental regulations require EDF to curtail output when river temperatures exceed safety thresholds, with further outages expected as the heatwave persists through mid-week.

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The Wire takeaway

If you sell industrial cooling systems, power infrastructure software, or grid balancing tools to European utilities, heatwaves are now your sales cycle. France loses 14% of power capacity when rivers warm—that's a permanent operating cost until nuclear plants get retrofitted or relocated, and it's spreading east this week.

Read the full story at reuters.com

Topics: Energy Storage · nuclear-output · climate-constraint · grid-risk · water-stress · europe-power

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Verified 15 July 2026 · Sources: Fusion42 review