Reducing human radiation risks on deep space missions
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Authors
Worden, Kathryn A.
Subjects
space radiation protection
human Mars mission
human deep space mission
space radiation shielding
medical countermeasures
Mars mission architecture
human Mars mission
human deep space mission
space radiation shielding
medical countermeasures
Mars mission architecture
Advisors
Tackett, Stephen
Rhatigan, Jennifer
Date of Issue
2017-09
Date
Sep-17
Publisher
Monterey, California: Naval Postgraduate School
Language
Abstract
This paper uses a systems engineering approach to address radiation exposure risks for humans on the first missions to Mars. Alternatives are reviewed in the areas of Mars mission architectures, various shielding technologies, and medical treatment options to help mitigate the risks of radiation doses received. The over-arching goal of this study is to determine if any alternatives will reduce astronaut radiation exposure on a mission to Mars to below the NASA space worker limits, while concurrently minimizing launch weight, costs, and risks. All alternatives are compared via a combination of existing trade studies and swing matrices. Using these tools, it is determined that boronated nitride nanotubes are the highest potential composite for vehicle shielding, and it is recommended that Martian regolith should be used in parallel for any long-stay by the crew on the Martian surface. Two medical countermeasures (Amifostine and Neupogen) are found to have the highest potential due for use, given that they are already FDA approved. It is also determined that no single shielding alternative will reduce crew exposure below existing limits, but further research may determine that a combination of composite shielding and regolith barriers may improve this outlook.
Type
Thesis
Description
Series/Report No
Department
Systems Engineering (SE)
Organization
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NPS Report Number
Sponsors
Funder
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Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.