Startup testing nuclear battery technology in orbit

2026-07-10 · Source: SpaceNews · Field: Technology & Digital — Robotics & Autonomous Systems, Emerging Technologies & Innovation · Depth: Intermediate, quick

Summary

Florida startup City Labs launched its BOHR (Betavoltaic Orbital High-Reliability) cubesat on July 7 aboard SpaceX's Transporter-17 rideshare mission, marking the first commercial in-orbit demonstration of its NanoTritium betavoltaic power system. This technology aims to provide power for future spacecraft and autonomous sensors for years without relying solely on solar panels. The NanoTritium system, which converts tritium's radioactive decay into microwatts of electricity, is being validated for low-power electronics in environments like deep space or permanently shadowed lunar regions. While the BOHR cubesat uses conventional solar arrays for its bus, the NanoTritium system independently powers its payload. This demonstration, partially funded by NASA and Pentagon contracts, also represents the first commercial nuclear mission to use the FAA's launch approval process under National Security Presidential Memorandum-20. City Labs plans a tritium-powered Radioisotope Heater Unit (RHU) demonstration in 2027 for lunar surface missions.

Key takeaway

For aerospace engineers designing long-duration missions in challenging environments, consider integrating tritium-based betavoltaic systems for critical low-power components. This technology offers continuous power independent of solar availability, extending operational lifespans in deep space or permanently shadowed lunar regions. You should evaluate the NanoTritium system for autonomous sensors or Radioisotope Heater Units to maintain thermal stability, leveraging the established FAA regulatory framework for commercial nuclear launches.

Key insights

Commercial betavoltaic technology offers long-duration, sunlight-independent power for low-power space applications.

Principles

• Betavoltaic systems convert radioactive decay to electricity.
• Tritium-based systems operate at low radiation levels.
• Regulatory frameworks exist for commercial nuclear launches.

Method

In-orbit demonstration validates betavoltaic power by independently powering a payload on a solar-powered cubesat.

In practice

• Power sensors in deep space or shadowed lunar regions.
• Keep components warm during long lunar nights.
• Extend operational life of distributed sensor networks.

Topics

• Nuclear Batteries
• Betavoltaic Power
• Spacecraft Power Systems
• Tritium Technology
• Cubesat Missions
• Space Regulation
• Lunar Exploration

Best for: Investor, Research Scientist, Policy Maker, Entrepreneur

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Editorial summary, takeaway, and curation by AIssential. Original article published by SpaceNews.