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Bulgaria’s nuclear plant to cut capacity due to Danube’s low water level

By Thomson Reuters Aug 20, 2026 | 11:07 AM

SOFIA, Aug 20 (Reuters) – Bulgaria’s sole nuclear power plant said it will cut capacity by about 12% on Friday ​due to the Danube river’s low ‌water levels.

The Kozloduy Nuclear Power Plant (NPP), which provides around 35% of Bulgaria’s electricity needs, operates two 1,000 MW Soviet-made reactors – Units 5 and 6. ‌It ​said it would cut ⁠capacity at unit ⁠5 by about 120 MW to ensure the plant’s safe operation.

The decision was taken due to the “ongoing unprecedented and critical decrease ​in the Danube River”, the plant said, adding that this was the ⁠first time in its ⁠52-year operational history that the power ​capacity had to be reduced due to ​extreme hydrological conditions.

Record low water levels in ‌Europe’s major rivers have reduced electricity output, with nuclear power production in Hungary and hydropower in Serbia falling sharply because of ⁠the Danube’s low levels.

Last week, Romania’s sole nuclear power producer Nuclearelectrica shut down its plant completely ⁠due to ‌the low Danube.

A team set ⁠up at Kozloduy in July ​has ‌implemented necessary procedures to ensure ​the plant’s ⁠safe and reliable operation in the event of a prolonged drop in river levels, the company said.

(Reporting by Stoyan Nenov; Writing by Daria Sito-Sucic; Editing by Mark Potter and ​Susan Fenton)