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High river temperatures to limit French nuclear power production

By Forrest Crellin, July 13, 2023, PARIS, (Reuters) – Output restrictions are expected at two nuclear plants along the Rhone river in eastern France due to high temperature forecasts, nuclear operator EDF (EDF.PA) said, several days ahead of the similar warning last year, but affecting fewer plants.

The hot weather is likely to halve the available power supply from the 3.6 gigawatt (GW) Bugey plant and the 2.6 GW Saint Alban plant from July 13 and July 16 respectively, the operator said.

However, production will be at least 1.8 GW at Bugey and 1.3 GW at Saint Alban to meet grid requirements, and may change according to grid needs, the operator said.

Kpler analyst Emeric de Vigan said the restrictions were likely to have little effect on output in practice, with cuts likely only at the weekend or midday when solar output was at its peak, so that the impact on power prices would be slim.

He said the situation would need monitoring in coming weeks, however, noting it was unusually early in the summer for such restrictions to be imposed.

Water temperatures at the Bugey plant already eclipsed the initial threshold on July 9 where restrictions are possible, and are currently forecast to peak next week and then drop again, Refinitiv data showed……….

The Garonne river in southern France has the highest potential for warming to critical levels, but the Golfech plant is currently offline for maintenance until mid-August, the data showed.

“(The restrictions were) to be expected and it will probably occur more often,” Greenpeace campaigner Roger Spautz said.

“The authorities must stick to existing regulations for water discharges. Otherwise the ecosystems will be even more affected,” he added………………………….. more https://www.reuters.com/business/energy/high-river-temperatures-limit-french-nuclear-power-production-2023-07-12/

July 14, 2023 - Posted by Christina Macpherson | climate change, France