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A year in orbit: ISS deployment tests radiation detectors for future space missions
The predawn darkness on a cool Florida night was shattered by the ignition of nine Merlin engines on a SpaceX Falcon 9 rocket. The thrust of the engines shook the ground miles away. From a distance, the rocket appeared to slowly rise above the horizon. For the cargo onboard, the launch was anything but gentle, as the ignition of liquid oxygen generated more than 1.5 million pounds of force. After the rocket had been out of sight for several minutes, the booster dramatically returned to Earth with several sonic booms in a captivating show of engineering designed to make space travel less expensive and more sustainable.
A. P. Herbert, B. Fisher, M. Granger, M. Blood, N. DeSotel
Nuclear Technology | Volume 211 | Number 2 | October 2025 | Pages S9-S16
Research Articles | doi.org/10.1080/00295450.2024.2431777
Articles are hosted by Taylor and Francis Online.
Space nuclear systems (SNSs) present a robust source of power and/or propulsion technology that will fundamentally enhance and expand deep-space mission capability. In this era of space nuclear renaissance, there are several active U.S. SNS programs, one of which is seeking the first space reactor launch approval of the modern era. SNSs present complex systems with unique and novel challenges for established launch safety procedures, particularly for prelaunch and initial launch operations as prescribed by the U.S. government’s federal ranges. This paper examines high-level range safety considerations for a model expander cycle nuclear thermal propulsion SNS during ground processing and the pad and launch operational phases.