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Full Mission Astronaut Radiation Exposure Assessments for Long Duration Lunar Surface MissionsRisk to astronauts due to ionizing radiation exposure is a primary concern for missions beyond Low Earth Orbit (LEO) and will drive mission architecture requirements, mission timelines, and operational practices. For short missions, radiation risk is dominated by the possibility of a large Solar Particle Event (SPE). Longer duration missions have both SPE and Galactic Cosmic Ray (GCR) risks. SPE exposure can contribute significantly toward cancer induction in combination with GCR. As mission duration increases, mitigation strategies must address the combined risks from SPE and GCR exposure. In this paper, full mission exposure assessments were performed for the proposed long duration lunar surface mission scenarios. In order to accomplish these assessments, previously developed radiation shielding models for a proposed lunar habitat and rover were utilized. End-to-End mission exposure assessments were performed by first calculating exposure rates for locations in the habitat, rover, and during Extra-Vehicular Activities (EVA). Subsequently, total mission exposures were evaluated for the proposed timelines. Mission exposure results, assessed in terms of effective dose, are presented for the proposed timelines and recommendations are made for improved astronaut shielding and safer operational practices.
Document ID
20110008537
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Adamczyk, Anne
(Tennessee Univ. Knoxville, TN, United States)
Clowdsley, Martha
(NASA Langley Research Center Hampton, VA, United States)
Qualls, Garry
(NASA Langley Research Center Hampton, VA, United States)
Blattnig, Steve
(NASA Langley Research Center Hampton, VA, United States)
Lee, Kerry
(NASA Johnson Space Center Houston, TX, United States)
Fry, Dan
(NASA Johnson Space Center Houston, TX, United States)
Stoffle, Nicholas
(Lockheed Martin Corp. Houston, TX, United States)
Simonsen, Lisa
(NASA Langley Research Center Hampton, VA, United States)
Slaba, Tony
(NASA Langley Research Center Hampton, VA, United States)
Walker, Steven
(Old Dominion Univ. Norfolk, VA, United States)
Zapp, Edward
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 25, 2013
Publication Date
March 5, 2011
Publication Information
ISBN: 978-1-4244-3888-4/
Subject Category
Space Radiation
Report/Patent Number
NF1676L-11014
Meeting Information
Meeting: 2011 IEEE Aerospace Conference
Location: Big Sky, MT
Country: United States
Start Date: March 5, 2011
End Date: March 12, 2011
Sponsors: Institute of Electrical and Electronics Engineers
Funding Number(s)
WBS: WBS 651549.02.07.01
Distribution Limits
Public
Copyright
Other

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