Latvian Startup Unveils Innovative Nuclear Waste-Powered Generator for Moon Missions

Latvian startup Deep Space Energy has announced the development of a compact radioisotope power generator designed to produce electricity for lunar missions and satellites, using significantly less fuel than traditional systems. The innovative generator claims to deliver the same power output as existing space nuclear technologies while requiring only one-fifth the amount of fuel. The company has successfully raised €350,000 in pre-seed funding and secured an additional €580,000 through public contracts and grants, propelling the technology closer to commercialization.

The generator harnesses heat from the radioactive decay of isotopes, particularly Americium-241, which is sourced from commercial nuclear reactor waste. Unlike conventional radioisotope thermoelectric generators (RTGs) that utilize thermocouples for energy conversion, Deep Space Energy’s design enhances fuel efficiency, a critical factor for space missions.

Revolutionizing Space Power Systems

Speaking about the generator’s potential, founder and CEO Mihails Ščepanskis stated, “Our technology, which has already been validated in the laboratory, has several applications across the defence and space sectors.” He emphasized its role as an auxiliary energy source, enhancing the resilience of strategic satellites. With the ability to provide backup power independent of solar energy, this system is vital for high-value military reconnaissance operations.

Traditional RTGs require substantial quantities of radioactive material to maintain power over long durations. Deep Space Energy asserts that its generator only needs approximately 2 kg of Americium-241 to generate 50 watts of electrical power for a lunar rover, while legacy systems typically require around 10 kg for the same output. This drastic reduction in fuel mass can have significant implications for launch costs, as sending one kilogram to the Moon can reach up to €1 million. Thus, cutting the mass of radioisotope material by 80 percent could dramatically reduce mission budgets or allow for additional payload capacity.

The company is focusing on satellite operations in Medium Earth Orbit, Geostationary Orbit, and Highly Elliptical Orbit. In these regions, spacecraft perform critical functions such as synthetic aperture radar imaging, signal intelligence, and missile-launch detection. A non-solar backup system enhances operational resilience, particularly during power degradation, eclipses, or other disruptions.

Addressing Lunar Challenges

The Moon presents unique challenges for energy generation. With lunar nights lasting around 354 hours and temperatures plummeting below minus 150 degrees Celsius, solar panels are ineffective in darkness, and battery systems struggle to provide sufficient power for extended periods. Deep Space Energy’s compact radioisotope generator offers a continuous low-power output that is independent of sunlight, which is essential for thermal regulation, communications, and survival systems during long lunar nights or in permanently shadowed areas.

Looking ahead, production capacity for Americium-241 is projected to reach around 10 kg annually by the mid-2030s. If the efficiency claims of Deep Space Energy hold true, this supply could facilitate numerous lunar and deep space missions that were previously unfeasible with traditional RTG technology.

Deep Space Energy aims to position its generator as a vital asset for deep space science missions, lunar operations, and high-value defence satellites, providing a lighter and more fuel-efficient alternative to outdated nuclear technologies. The company’s innovation could play a crucial role in advancing Europe’s independent capabilities in satellite technology, enhancing resilience against various operational challenges.