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Otrera Nuclear Energy develops sodium-cooled fast reactors designed to recycle fuel and reduce nuclear waste.
Founded in 2024, Otrera Nuclear Energy is based in Aix-en-Provence, France. It develops fourth-generation sodium-cooled fast reactors intended to recycle nuclear fuel, improve efficiency and reduce waste. The company also provides reactor engineering and technology development for modular energy systems. In May 2026, it raised an undisclosed amount from Groupe EDF, Ingerop, Normandie Participations, Onet Technologies and SNEF SAS, alongside returning investors Groupe ADF, Exergon and Fortil SAS. The funding will support technology testing, engineering and studies for a factory in Normandy.
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