Otrera

Otrera is a French company positioned in the nuclear energy sector, established in 2023 with headquarters in Aix-en-Provence. The company was founded by Frédéric Varaine, who serves as President, alongside co-founders Grégory Cherbuis (Deputy CEO) and Nicole Fortunet. A spin-off of the French Alternative Energies and Atomic Energy Commission (CEA), Otrera builds upon five decades of French research, notably advancements from the Astrid project, to develop its core technology. The venture is a laureate of the France 2030 program, signaling strong governmental support.

Otrera's primary business is the design and development of a fourth-generation modular nuclear reactor. Specifically, it is advancing a Sodium Fast Reactor (SFR) designed to address both energy sovereignty and industrial decarbonization. This technology allows for the recycling of spent fuel assemblies from existing nuclear plants, a key feature aimed at improving sustainability and reducing nuclear waste. The business model appears to encompass technology sales as well as the potential for joint operation or direct operation of the reactors it develops. Otrera targets a diverse client base, including municipalities for district heating, energy-intensive industries, and large data centers.

The company's product is a compact, modular reactor with a planned output of 110 MWe (megawatts electric) and 180 MWth (megawatts thermal) in cogeneration mode, capable of supplying both electricity and heat. This dual output makes it suitable for various industrial processes and urban heat networks. Key benefits emphasized by the company include enhanced safety through features like passive cooling systems, extended operational autonomy, and improved economic performance by lowering construction and operating costs. The reactor can operate for a decade before refueling is needed. In December 2024, Otrera secured its first funding round of €2.5 million from a consortium of industrial and financial investors, including Exergon, CEA Investissement, and Groupe ADF, to accelerate the reactor's development. The company is planning a second funding round for 2025 and aims to commission its first industrial demonstrator by 2032.

Keywords: nuclear energy, Sodium Fast Reactor, SMR, advanced modular reactor, decarbonization, energy sovereignty, CEA spin-off, France 2030, industrial heat, urban heat networks, spent fuel recycling, cogeneration, low-carbon energy, nuclear waste reduction, Frédéric Varaine, Grégory Cherbuis, sustainable energy, energy transition, nuclear innovation, climate tech, deeptech, energy production