We redefine nuclear energy

Founded in 2023 and backed by the French Public Investment Bank (Bpifrance), Otrera is a spin-off from the French Alternative Energies and Atomic Energy Commission (CEA), pioneering next-generation reactors for a sustainable energy future.

Capenergies Logo

We’re building an energy model that’s accessible, democratic, rooted in local communities, and fully aligned with the climate transition.

Frédéric Varaine

Founder & CEO, Otrera

Otrera announces the close of its fundraising round, securing 2.5 million euros to accelerate the development of its next-generation nuclear reactors

Aix-en-Provence, Wednesday, December 4, 2024. Otrera, a spin-off of the French Alternative Energies and Atomic Energy Commission (CEA) and winner of the France 2030 program, is pleased to announce the close of its first fundraising round, which secured 2.5 million...

Next-generation Reactors: Otrera Joins a Working Group on MOX Fuel with Orano

Paris, October 22, 2024 – Otrera, a leading developer of fourth-generation nuclear reactors, is pleased to announce its participation in the "MOX RNR" working group. This initiative brings together several prominent players in the advanced nuclear sector to redesign...

Next-Generation Reactors: Otrera Joins MOX Fuel Working Group with Orano

Paris, October 22, 2024 – Otrera, a designer of fourth-generation nuclear reactors, announces its integration into the "MOX RNR" working group, an initiative bringing together several new nuclear stakeholders to rebuild the industrial framework for fuel supply and...

Otrera, Winner of BPI’s “Innovative Nuclear Reactors” Call for Projects – Press Review

Following Otrera's favorable integration decision in response to the Public Investment Bank's (BPI) "Innovative Nuclear Reactors" call for projects, numerous dispatches and articles have been published in recent hours. We begin this press review with an article titled...

Otrera, Winner of the “Innovative Nuclear Reactors” Call for Projects, Begins the Development of its SMR Reactor

Paris, November 27, 2023. The French government has set as its primary objective, within the framework of the France 2030 plan, to position France as a leader in the creation and development of innovative and autonomous companies. These companies would focus on...

Small Modular Reactors – SMR: the New Era of Nuclear Power?

On October 12, 2021, Emmanuel Macron unveiled an ambitious five-year investment plan of 30 billion euros, which has been widely discussed in recent months, the renowned "France 2030" plan. It is designed to promote industrial competitiveness and future technologies in...

L’Express “Nucléaire : les mini-réacteurs, une filière en plein essor en France”

According to L'Express, the small nuclear reactor sector is experiencing significant growth in France, supported by the France 2030 plan. Approximately ten companies are positioning themselves in this field to decarbonize industry. Mini-nuclear reactors, or Small...

AEF Info: Otrera among CEA’s Five Startups on Innovative Reactors

The French Alternative Energies and Atomic Energy Commission (CEA) has announced the five startups that will respond to the 'innovative nuclear reactors' call for projects under the France 2030 plan. Among these promising companies is Otrera, a bold company that is...

Press Release: Otrera, a Startup Spun off by the CEA, to Open a New Chapter in Nuclear Energy

Paris - Otrera Nuclear Energy, a startup specializing in next-generation reactors, is proud to announce the signing of the contract confirming the Commissariat à l'énergie atomique (CEA)'s equity investment, confirming the spin-off operation announced in April....

Small Modular Reactors in France: a Questionable Proposition?

On October 12, 2021, the President of the Republic unveiled a major initiative with a five-year investment plan of 30 billion euros, the famous France 2030 plan, to stimulate industry and future technologies in France. At the time, it envisioned the development of...

For a New Generation of Reactors

At Otrera, we tackle the climate and energy crisis collectively. Our ambition is to build a new generation of French nuclear excellence—one that creates jobs, strengthens national sovereignty, and boosts European competitiveness. We are committed to delivering low-carbon energy at an affordable and predictable cost.

The Otrera reactor is the result of a bold engineering vision, combining breakthrough technologies to offer a unique market position and exceptional cost-efficiency. It brings remarkable versatility, adaptable to a wide range of applications.

Redefining the Future of Energy Production : a paradigm shift

In the face of climate, energy, economic, and social crises, energy—once just a daily concern—has become a national priority. Demand is rising while production is falling behind. Otrera was created to meet this challenge head-on.

Our ambition is to build a new generation of nuclear reactors—designed to serve local needs, minimize long-term waste, and set ourselves high safety standards.

A Team Committed to Excellence

Our experienced team brings together seasoned professionals from the nuclear industry and forward-thinking experts from other fields who share a common ambition: to build a new nuclear future. With decades of combined experience, we have developed deep expertise in the design, construction, and management of large-scale nuclear projects.

We are driven by passion and a commitment to push the boundaries of innovation to deliver safe, sustainable energy solutions. Together, we are a resilient and dedicated team, ready to take on the complex challenges of the nuclear sector with an unwavering focus on excellence and performance.