Engineering design constraints of the lunar surface environment

Details Engineering design constraints of the lunar surface environment Engineering design constraints of the lunar surface environment

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992lmt..symps....m&link_type=abstract

In Arizona Univ., Proceedings of the Lunar Materials Technology Symposium 2 p (SEE N93-27956 10-91)

Biology

Activity (Biology), Aerospace Medicine, Aerospace Safety, Bioastronautics, Extravehicular Activity, Human Reactions, Ionizing Radiation, Lunar Bases, Lunar Surface, Radiation Effects, Radiation Shielding, Space Habitats, Spacecrews, Chemical Properties, Design Analysis, Electromagnetic Properties, Health, Regolith, Safety Factors, Seismology, Solar Flares, Surface Properties, Thermal Environments

Scientific paper

Living and working on the lunar surface will be difficult. Design of habitats, machines, tools, and operational scenarios in order to allow maximum flexibility in human activity will require paying attention to certain constraints imposed by conditions at the surface and the characteristics of lunar material. Primary design drivers for habitat, crew health and safety, and crew equipment are: ionizing radiation, the meteoroid flux, and the thermal environment. Secondary constraints for engineering derive from: the physical and chemical properties of lunar surface materials, rock distributions and regolith thicknesses, topography, electromagnetic properties, and seismicity. Protection from ionizing radiation is essential for crew health and safety. The total dose acquired by a crew member will be the sum of the dose acquired during EVA time (when shielding will be least) plus the dose acquired during time spent in the habitat (when shielding will be maximum). Minimizing the dose acquired in the habitat extends the time allowable for EVA's before a dose limit is reached. Habitat shielding is enabling, and higher precision in predicting secondary fluxes produced in shielding material would be desirable. Means for minimizing dose during a solar flare event while on extended EVA will be essential. Early warning of the onset of flare activity (at least a half-hour is feasible) will dictate the time available to take mitigating steps. Warning capability affects design of rovers (or rover tools) and site layout. Uncertainty in solar flare timing is a design constraint that points to the need for quickly accessible or constructible safe havens.

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