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Hungary grants Paks nuclear plant temporary exemption from cooling water rules

By Thomson Reuters Jun 29, 2026 | 6:57 AM

BUDAPEST, June 29 (Reuters) – Hungary’s energy minister has granted a temporary exemption for the Paks nuclear power plant from ​downstream cooling water temperature rules to ‌prevent another steep cut in power output amid a record heatwave, the plant’s operator said on Monday.

• The power plant said its output must ‌still ​be lowered by an ⁠additional 40 megawatts (MW), even ⁠with loosened regulation after similar measures over the weekend.

• The Danube’s temperature at the Paks nuclear plant reached 30.2 degrees ​Celsius on Monday, exceeding a 29.5 C intervention threshold.

• Without the exemption, output ⁠would have to be ⁠reduced by a further 640 MW ​at the 2 GW plant, meaning the ​plant would have run at less than ‌half its capacity.

• Output from the Russian-built reactors had already been cut by a total of 563 MW over the weekend ⁠because of the high temperature of the Danube River, water from which is used by the ⁠plant as ‌a coolant.

• Power grid operator ⁠Mavir recommended the temporary exemption to ​guarantee ‌security of power supply.

• The ​exemption is ⁠valid for Monday and Tuesday during the forecast heatwave.

• The energy minister has urged Hungarians to curb electricity consumption during evening hours.

(Reporting by Anita Komuves and Gergely SzakacsEditing by ​David Goodman)