bloomberg | A Department of Defense agency and NASA picked Lockheed Martin Corp. to design and develop the first nuclear thermal rocket engine to be tested in space, part of a program called DRACO.
Through a contract announced on Wednesday with the federal research and development organization known as Darpa,
Lockheed Martin will design and build the nuclear-propelled engine
along with an experimental spacecraft, called X-NTRV. The goal will be
to launch the spacecraft with the nuclear engine in 2027.
NASA will commit $300 million to DRACO, while the US Space Force will provide the launch vehicle and pad for the X-NTRV vehicle.
The
idea of nuclear thermal propulsion has long been considered as a way to
send shortened crewed missions to Mars. Such engines could produce high
thrust, but more efficiently and with less complexity than traditional
chemically powered rocket engines.
Nuclear-powered
rocket engines work by transferring heat from a reactor to hydrogen
propellant. As the hydrogen heats up, it expands and is funneled out of a
nozzle, producing thrust.
Though
Lockheed Martin will create the engine, Virginia-based BWX Technologies
will build the nuclear fission reactor for the engine. The Department
of Energy will also contribute high-assay low-enriched uranium (HALEU)
fuel for the reactor.
To
date, there has been no in-space demonstration of nuclear thermal
propulsion. In the 1960s and 70s, NASA conducted a program called NERVA,
which aimed to develop a nuclear-powered rocket engine for deep-space
missions, though nothing ever flew in space. In January, NASA and DARPA
announced their plans to collaborate on DRACO to perform an in-space
demonstration of the technology.
An
operational failure could present the risk of spreading radioactive
material. “The reactor will not be turned on until the spacecraft has
reached a nuclear safe orbit,” Lockheed Martin said in a statement,
making the system “very safe.”
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