Record Details

The Liquid Annular Reactor System (LARS) propulsion
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Author and Affiliation:
Powell, James(Brookhaven National Lab., Upton, NY., United States);
Ludewig, Hans(Brookhaven National Lab., Upton, NY., United States);
Horn, Frederick(Brookhaven National Lab., Upton, NY., United States);
Lenard, Roger(Strategic Defense Initiative Organization, Washington, DC., United States)
Abstract: A concept for very high specific impulse (greater than 2000 seconds) direct nuclear propulsion is described. The concept, termed the liquid annular reactor system (LARS), uses liquid nuclear fuel elements to heat hydrogen propellant to very high temperatures (approximately 6000 K). Operating pressure is moderate (approximately 10 atm), with the result that the outlet hydrogen is virtually 100 percent dissociated to monatomic H. The molten fuel is contained in a solid container of its own material, which is rotated to stabilize the liquid layer by centripetal force. LARS reactor designs are described, together with neutronic and thermal-hydraulic analyses. Power levels are on the order of 200 megawatts. Typically, LARS designs use seven rotating fuel elements, are beryllium moderated, and have critical radii of approximately 100 cm (core L/D approximately equal to 1.5).
Publication Date: Apr 01, 1990
Document ID:
19910012832
(Acquired Nov 07, 1995)
Accession Number: 91N22145
Subject Category: SPACECRAFT PROPULSION AND POWER
Document Type: Conference Paper
Publication Information: NASA. Lewis Research Center, Vision-21: Space Travel for the Next Millennium; p 114-123
Publisher Information: United States
Contract/Grant/Task Num: DE-AC02-76CH-00016
Financial Sponsor: NASA; United States
Organization Source: Brookhaven National Lab.; Upton, NY, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: HYDROGEN FUELS; LIQUID FUELS; NUCLEAR FUEL ELEMENTS; NUCLEAR PROPULSION; NUCLEAR REACTORS; REACTOR DESIGN; SPACECRAFT PROPULSION; BERYLLIUM; CENTRIPETAL FORCE; HIGH IMPULSE; ROTATING LIQUIDS; SPECIFIC IMPULSE
Imprint And Other Notes: In NASA. Lewis Research Center, Vision-21: Space Travel for the Next Millennium p 114-123 (SEE N91-22139 14-12)
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