Advancing nuclear-fueled thermoelectric generator technologies for space exploration

Funded by the European Commission under the Horizon Europe Programme, STARTREC stands for Space, domesTic and industriAl applications with impRoved TheRmoElectric Component. Thermoelectric generators for space exploration are devices that convert heat into electricity. They use the temperature difference between a heat source like radioisotopes and the cold environment of space to generate power. This energy source is especially crucial where the sun does not supply sufficient power. The four-year project aims to demonstrate and improve their performance for space and other applications. Tractebel’s role will be to lead the requirements definition for an innovative radioisotope thermoelectric generator. We will also define the demonstrator tests in relevant environments.

Innovative thermoelectric generators

Led by the French Alternative Energies and Atomic Energy Commission, the project brings together leading companies in renewable and nuclear energy, material science, and engineering, including: Tractebel, the Friedrich-Alexander-Universität Erlangen-Nürnberg in Germany, the RGS Development BV in the Netherlands, the Voestalpine Stahl GmbH, ÖkoFEN Forschungs- und Entwicklungsgesellschaft and K1-MET GmbH in Austria, and the Centre Spatial de Liège in Belgium.

STARTREC’s goal is to make thermoelectric generators more efficient – doubling the current conversion efficiency from 5 to 10% –  so they can produce more electricity from the same amount of heat. This electricity can power spacecraft instruments and other equipment. The project will use advanced 3D printing and new moulding techniques to create more efficient thermoelectric generators that work better across a wider range of temperatures.

Picture: Rover Autonomy Testbed by night (copyright: ESA)

Radioisotope thermoelectric generator

Tractebel, as an industrial end-user for space applications, will play a crucial role in defining requirements for the radioisotope thermoelectric generator and its testing and demonstration of compliance. Our engineers can leverage our expertise in radioisotopes and the experience acquired with previous projects such as the EU-funded PULSAR and the ESA-funded Optimus Pro.

	“Our multidisciplinary experts have the skills and competences required to contribute to developing Europe’s nuclear technology for space exploration and other applications. With thermoelectric generators produced and commercialised by European industrial leaders, the STARTREC project will significantly reinforce the EU's strategic autonomy in powering space exploration missions.”
Alessia Simonini, Space Exploration Project Manager, Tractebel

The STARTREC project has received funding from the European Union’s Horizon Europe research and innovation programme under grant agreement N^o 101160663.

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