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Home > Space and Aero > DARPA Seeks Nuclear Thermal Rocket Proposals

DARPA Seeks Nuclear Thermal Rocket Proposals

[DRACO graphic via DARPA]

DARPA (Defense Advanced Research Projects Agency) seeks proposals leading to in-space demonstration of a nuclear thermal rocket.

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Press Release, Arlington, 05 May 2022: DARPA is seeking proposals for Phases 2 and 3 of the Demonstration Rocket for Agile Cislunar Operations (DRACO) programme for the design, development, fabrication, and assembly of a nuclear thermal rocket engine. The goal is to execute an in-space flight demonstration of nuclear thermal propulsion in fiscal year 2026.

The overall objective of DRACO is to enable time-critical missions over vast distances in cislunar space, the area between Earth and the moon. Nuclear thermal propulsion achieves high thrust-to-weight similar to chemical propulsion but with two to five times the efficiency using systems that are both faster and smaller than electric and chemical systems, respectively. These propulsive capabilities will enable the United States to enhance its interests in space and to expand possibilities for NASA’s long-duration human spaceflight missions.

Phase 1 of the DRACO programme involved two parallel risk reduction activities. Track A focused on developing a preliminary design for the rocket engine reactor. Track B concentrated on developing a conceptual design for the in-orbit demonstration system. DRACO’s planned Phases 2 and 3 will focus on developing and demonstrating nuclear thermal rocket engine operation in orbit.

“The United States employs manoeuvre to maintain advantages in the land, sea, and air domains. However, manoeuvre is more challenging in space due to propulsion system limitations,” said Major Nathan Greiner, programme manager in DARPA’s Tactical Technology Office. “To maintain technological superiority in space, the United States requires leap-ahead propulsion technology that the DRACO programme will provide.”

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