Ultra high temperature particle bed reactor design

Details Ultra high temperature particle bed reactor design Ultra high temperature particle bed reactor design

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990vstn.nasa..107l&link_type=abstract

In NASA. Lewis Research Center, Vision-21: Space Travel for the Next Millennium p 107-113 (SEE N91-22139 14-12)

Physics

Manned Mars Missions, Nuclear Fission, Nuclear Propulsion, Nuclear Reactors, Pebble Bed Reactors, Reactor Design, Spacecraft Propulsion, Beryllium, Cooling Systems, Cylindrical Bodies, Exhaust Systems, Fissionable Materials, High Temperature, Hydrogen

Scientific paper

A direct nuclear propulsion engine which could be used for a mission to Mars is designed. The main features of this reactor design are high values for I(sub sp) and very efficient cooling. This particle bed reactor consists of 37 cylindrical fuel elements embedded in a cylinder of beryllium which acts as a moderator and reflector. The fuel consists of a packed bed of spherical fissionable fuel particles. Gaseous H2 passes over the fuel bed, removes the heat, and is exhausted out of the rocket. The design was found to be neutronically critical and to have tolerable heating rates. Therefore, this particle bed reactor design is suitable as a propulsion unit for this mission.

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