# NASA Advances SR-1 Freedom Nuclear Propulsion for Mars Mission The SR-1 Freedom spacecraft targets a 2028 launch to demonstrate deep-space fission power. - **Source:** [NASA](https://www.nasa.gov) - **Published:** 2026-10-20 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/95b6ec9d-fe8b-4a03-9728-2f51c0348c70 ## Pioneering Fission-Powered Spacecraft NASA is developing the Space Reactor-1 Freedom, the first spacecraft designed to demonstrate fission power beyond Earth’s orbit. This mission aims to validate nuclear electric propulsion technology for deep space travel. The project represents a critical shift in propulsion capabilities, moving beyond traditional chemical rockets to enable long-duration missions to Mars and beyond. ## Strategic Contractual Advancements To maintain momentum for the 2028 launch, NASA and its partners have finalized key contract actions. These agreements are designed to reduce technical risks and foster collaboration among stakeholders. Program director Steve Sinacore emphasized that these steps ensure a robust foundation for the mission while developing technology extensible to future nuclear space applications. ## Nuclear Power Module Architecture The spacecraft’s nuclear power module is positioned at the end of a boom. It utilizes a fission reactor to generate heat, which is then converted into electricity. This power supports both the spacecraft's internal systems and its electric propulsion, providing a sustainable energy source for extended operations in deep space environments. ## Power Conversion System Integration Sierra Lobo Inc. is providing the closed Brayton cycle power conversion system under the 2024 Space Flight Systems Development and Operations Contract III. This system converts thermal energy from the reactor into electrical power. The work is currently being conducted at NASA’s Glenn Research Center in Cleveland to ensure seamless hardware integration. ## Reactor Design and Collaboration While Sierra Lobo manages the conversion system, the Department of Energy’s Idaho National Laboratory is leading the design and development of the fission reactor itself. This interagency collaboration combines specialized expertise to complete the nuclear power module, ensuring that both the thermal generation and conversion components meet the mission’s rigorous performance requirements. ## Safety Protocols and Oversight NASA and the Department of Energy implement strict safety standards throughout the development process. Measures include interagency reviews, continuous oversight by a chief safety officer, and rigorous hazard analysis. Crucially, the reactor remains inactive during the launch phase and will only be activated once the spacecraft has successfully exited Earth’s orbit. ## The SkyFall Science Payload The mission will deliver the SkyFall science payload, consisting of three Mars helicopters evolved from the Ingenuity design. These assets are tasked with collecting scientific data, mapping exploration zones, and identifying potential water sources on the Martian surface. This deployment serves as a practical demonstration of the spacecraft's capability to support complex operations. ## Future Deep Space Implications The SR-1 Freedom mission serves as a precursor for next-generation fission systems. These technologies are intended to support NASA’s Moon Base, providing power during periods of darkness where solar energy is insufficient. By proving nuclear propulsion viability, the mission paves the way for sustained human presence and exploration in deep space environments. ## Sources covering this story - https://www.nasa.gov/centers-and-facilities/glenn/sr-1-freedom-advances-with-progress-on-nuclear-power-module/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._