SMRTR TechMay 29, 2025Interesting Engineering

Nuclear rocket breakthrough: US scientists build molten uranium engine for faster missions

SMRTR summary

Nuclear scientists have developed a liquid uranium-fueled engine called the Centrifugal Nuclear Thermal Rocket (CNTR), aiming to double spacecraft efficiency compared to current nuclear propulsion concepts. The CNTR uses molten uranium fuel in a centrifuge, with hydrogen gas bubbled through and expelled for thrust. It could achieve a specific impulse of 1500 seconds, significantly increasing spacecraft velocity while maintaining similar thrust levels to existing systems.

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