A key element of the European Union’s Green Deal package has been delayed after France, the bloc’s biggest supporter of nuclear power, said it won’t back a law to scale up renewable energy.

Member-state officials had been due to endorse the Renewable Energy Directive at a meeting Wednesday, paving the way for a formal vote as soon as next week. Yet French concerns over how nuclear can help industries meet climate goals, plus opposition from some central and east European countries worried about green-transition costs, saw the law struck from the agenda.

The wrangling is a further blow for the EU’s Green Deal, with various elements thrown into doubt by countries’ domestic political concerns. France, which relies on nuclear for the bulk of its electricity supply, has been pushing to allow a greater role for the technology in the energy transition.

The delay echoes a last-minute hiccup that hampered EU legislation on car emissions earlier this year as Germany pushed to include so-called e-fuels in the regulation. After weeks of heated talks, the country dropped its opposition after securing assurances of a carve-out for the fuels, while the law itself was left unchanged.

Such hitches are unusual in EU lawmaking, but France is now following Germany’s playbook: protesting once EU negotiators have already reached a framework deal. Back in March, member states and parliament agreed to raise the 2030 renewable target to 42.5% of total energy consumption, while providing a small role for nuclear.

The RED was taken off Wednesday’s agenda following objections from France, people with knowledge of the matter said. While Paris hasn’t specified its demands, it may be looking for concessions in other regulations or additional assurances from the European Commission in exchange for dropping its opposition, they said.

Under EU rules, the text of the deal can’t be changed by member states alone; it would require reopening negotiations. The French prime minister’s office, Energy Transition Ministry and the country’s permanent representative to the EU didn’t immediately respond to requests for comment. The European Commission declined to comment.

Nuclear Trade-Off

A further date to address the renewables directive has not yet been set by Sweden — which holds the EU’s rotating presidency — according to people familiar with the situation.

The March accord on the RED allowed countries to reduce their green-hydrogen targets for industry if they mainly used nuclear power — rather than fossil fuels — to produce the rest of their hydrogen and kept renewable goals on track.

But France, Slovakia, Hungary, Poland, the Czech Republic, Bulgaria and Romania all signaled they wouldn’t support that agreement, according to a person with knowledge of the matter. And Markus Pieper, the center-right European Parliament lawmaker responsible for negotiating the deal, has admitted only Sweden would be able to benefit from the carve-out.

Another segment of the Green Deal — the ReFuelEU Aviation initiative, which is aimed at increasing the use of sustainable fuel in air travel — was also pulled from Wednesday’s agenda, the people said.