Nuclear Thermal Propulsion (NTP) is a space propulsion technology that uses nuclear reactors to heat a propellant to extremely high temperatures, which are then expelled through a nozzle to generate thrust.
NTP addresses the limitations of chemical propulsion systems by providing higher exhaust velocities, which can halve transit times for missions like crewed Mars flights.
The NTP system includes a nuclear reactor that heats liquid hydrogen to very high temperatures. The heated hydrogen passes through a nozzle where it expands and is expelled at high velocity, generating thrust. This process significantly increases the specific impulse (a measure of efficiency) compared to chemical rockets.
Manufacturing NTP involves complex nuclear reactor design and fabrication, as well as precise handling of radioactive materials. The liquid hydrogen tanks also require robust thermal insulation to maintain high temperatures during operation.
The build process starts with the design and construction of the nuclear reactor core, followed by integration with the propellant management system and the nozzle assembly. Testing for safety and performance is extensive due to the hazardous nature of the components involved.
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