Does Nuclear Get In the Way of Renewable? France and Germany Disagree.

“France and Germany lead the camps in disagreeing on the future of nuclear in Europe,” write two climate policy journalists. On the Energy Post blog they explore why — citing energy experts and politicians.

Germany “ultimately completed its nuclear exit in April 2023,” while France “has the highest share of nuclear in the energy mix of any country in the world.”

[A] major concern is that more nuclear means less renewables, at a time when wind and solar need all the scale they can get… In a joint attempt to provide greater technical clarity on the nuclear power debate, French think tank IDDRI and German Agora Energiewende set out in 2018 to understand how nuclear energy will influence the transformation of energy systems in both countries. They found that if a high share of coal or nuclear based conventional power capacity stays online in both countries, this will likely to delay the time when market prices allow renewable power operators to cover their production costs and run the operations at a profit. They also found that exporting surplus electricity with conventional plants bites into renewable power investments abroad. At the same time, the growing share of renewables would eventually render most conventional plants unprofitable. “In order to avoid stranded assets, it is essential to gradually reduce conventional capacities,” the bi-national report concluded…

Xavier Moreno, president of French think tank Ecological Realities and Energy Mix Study Circle (Cereme) and former vice president of French utility company Suez, said the all-renewables approach was complicated by a lack of viable electricity storage technologies. “Technically speaking, it would be necessary to store up to 20 percent to be able to smoothen renewable power supply.” Those who believe that this will be possible through a combination of different storage options are chasing “a dream,” Moreno argued.

The issue comes up when trading power in Europe’s integrated energy market: should gate closure times be based on a decentralised, flexible renewables-based system, or a centralised grid based on nuclear baseloads? Rainer Hinrichs-Rahlwes, European policy expert for the German Renewable Energy Federation lobby group, says “Nuclear power plants and their inflexible output can cause grid congestion, the opposite of what is needed to accommodate large shares of wind and solar in a modern and flexible grid system.”

The article notes that France plans to eliminate coal use by 2038, and already has one of the lowest emissions per head of any rich country. But “In mid-2023, 800 French scientists warned against the risks of the country’s new nuclear programme, pointing to unresolved questions of radioactive waste management, which remain largely unresolved in most of the EU, including in France. The scientists also warned against risks of accidental contamination or meltdown.”

Thanks to Slashdot reader AleRunner for submitting the article.