April 18, 2024

Could a Nuclear Thermal Rocket Engine Power a Trip to Mars? NASA and DARPA Are Testing

Artist idea of Demonstration for Rocket to Agile Cislunar Operations (DRACO) spacecraft, which will demonstrate a nuclear thermal rocket engine. Nuclear thermal propulsion innovation might be utilized for future NASA crewed missions to Mars. Credit: DARPA
NASA and the Defense Advanced Research Projects Agency (DARPA) recently announced a collaboration to demonstrate a nuclear thermal rocket engine in space, an enabling capability for NASA crewed objectives to Mars.
NASA and DARPA will partner on the Demonstration Rocket for Agile Cislunar Operations, or DRACO, program. The non-reimbursable arrangement developed to benefit both firms, describes roles, duties, and processes intended at accelerating development efforts.
” NASA will deal with our long-lasting partner, DARPA, to establish and demonstrate sophisticated nuclear thermal propulsion technology as soon as 2027. With the aid of this brand-new technology, astronauts could journey to and from deep space faster than ever– a significant ability to get ready for crewed objectives to Mars,” stated NASA Administrator Bill Nelson. “Congratulations to both NASA and DARPA on this amazing investment, as we spark the future, together.”

Illustration of a Mars transit environment and nuclear propulsion system that might one day take astronauts to Mars. Credit: NASA
Using a nuclear thermal rocket enables faster transit time, lowering danger for astronauts. Minimizing transit time is an essential component for human missions to Mars, as longer trips need more products and more robust systems. Maturing faster, more efficient transportation innovation will help NASA satisfy its Moon to Mars Objectives.
Other benefits to area travel include increased science payload capacity and higher power for instrumentation and interaction. In a nuclear thermal rocket engine, a fission reactor is utilized to create exceptionally high temperature levels. The engine transfers the heat produced by the reactor to a liquid propellant, which is broadened and exhausted through a nozzle to move the spacecraft. Nuclear thermal rockets can be three or more times more efficient than conventional chemical propulsion.
” NASA has a long history of working together with DARPA on jobs that allow our respective missions, such as in-space servicing,” stated NASA Deputy Administrator Pam Melroy. “Expanding our collaboration to nuclear propulsion will assist drive forward NASAs objective to send human beings to Mars.”
Under the agreement, NASAs Space Technology Mission Directorate (STMD) will lead technical advancement of the nuclear thermal engine to be incorporated with DARPAs experimental spacecraft. DARPA is functioning as the contracting authority for the advancement of the entire stage and the engine, that includes the reactor. DARPA will lead the overall program consisting of rocket systems combination and procurement, approvals, scheduling, and security, cover safety and liability, and make sure total assembly and integration of the engine with the spacecraft. Throughout the development, NASA and DARPA will work together on assembly of the engine before the in-space demonstration as early as 2027.
” DARPA and NASA have a long history of fruitful collaboration beforehand innovations for our respective goals, from the Saturn V rocket that took human beings to the Moon for the very first time to robotic maintenance and refueling of satellites,” stated Dr. Stefanie Tompkins, director, DARPA. “The space domain is vital to modern commerce, clinical discovery, and national security. The ability to accomplish leap-ahead advances in area innovation through the DRACO nuclear thermal rocket program will be necessary for more effectively and rapidly carrying product to the Moon and ultimately, people to Mars.”
The last nuclear thermal rocket engine tests conducted by the United States occurred more than 50 years ago under NASAs Nuclear Engine for Rocket Vehicle Application and Rover tasks.
” With this cooperation, we will take advantage of our proficiency got from numerous previous area nuclear power and propulsion jobs,” stated Jim Reuter, associate administrator for STMD. “Recent aerospace materials and engineering advancements are making it possible for a new era for area nuclear technology, and this flight demonstration will be a major achievement toward establishing an area transport ability for an Earth-Moon economy.”
NASA, the Department of Energy (DOE), and market are likewise establishing innovative space nuclear innovations for multiple initiatives to harness power for area expedition. Through NASAs Fission Surface Power project, DOE granted 3 business style efforts to develop nuclear reactor ideas that could be utilized on the surface of the Moon and, later on, Mars.
NASA and DOE are working another industrial design effort to advance higher temperature level fission fuels and reactor styles as part of a nuclear thermal propulsion engine. These style efforts are still under development to support a longer-range objective for increased engine performance and will not be utilized for the DRACO engine.

Artist idea of Demonstration for Rocket to Agile Cislunar Operations (DRACO) spacecraft, which will show a nuclear thermal rocket engine. Nuclear thermal propulsion innovation could be used for future NASA crewed missions to Mars.” NASA will work with our long-term partner, DARPA, to establish and demonstrate advanced nuclear thermal propulsion innovation as soon as 2027. In a nuclear thermal rocket engine, a fission reactor is used to produce extremely high temperature levels. Under the arrangement, NASAs Space Technology Mission Directorate (STMD) will lead technical advancement of the nuclear thermal engine to be integrated with DARPAs experimental spacecraft.