Computer Science
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992saei.confy....s&link_type=abstract
SAE, International Conference on Environmental Systems, 22nd, Seattle, WA, July 13-16, 1992, 14 p.
Computer Science
Lunar Bases, Radiation Protection, Radiation Shielding, Space Habitats, Spacecraft Construction Materials, Cost Effectiveness, Galactic Cosmic Rays, Linear Energy Transfer (Let), Radiation Transport, Regolith, Solar Protons, Weight Reduction
Scientific paper
The most recently accepted environment data are used as inputs for the Langley nucleon and heavy-ion transport codes, BRYNTRN and HZETRN, to examine the shield effectiveness of lunar regolith in comparison with commercially-used shield materials in nuclear facilities. Several of the fabricated materials categorized as neutron absorbers exhibit favorable characteristics for space radiation protection. In particular, polyethylene with additive boron is analyzed with regard to response to the predicted lunar galactic cosmic ray and solar proton flare environment during the course of a complete solar cycle. Although this effort is not intended to be a definitive trade study for specific shielding recommendations, attention is given to several factors that warrant consideration in such trade studies. For example, the transporting of bulk shield material to the lunar site as opposed to regolith-moving and processing equipment is assessed on the basis of recent scenario studies. The transporting of shield material from Earth may also be a viable alternative to the use of regolith from standpoints of cost-effectiveness, EVA time required, and risk factor.
Nealy John E.
Simonsen Lisa C.
Townsend Lawrence W.
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