Radiation Risk Predictions for Space Station Freedom Orbits

Authors

Francis A. Cucinotta, Rockwell International Space Systems Division, Houston, TexasFollow
William Atwell, Rockwell International Space Systems Division, Houston, Texas
Mark Weyland, Rockwell International Space Systems Division, Houston, Texas
Alva C. Hardy, Lyndon B. Johnson Space Center, Houston, Texas
John W. Wilson, Langley Research Center, Hampton, Virginia
Lawrence W. Townsend, Langley Research Center, Hampton, Virginia
Judy L. Shinn, Langley Research Center, Hampton, Virginia
Robert Katz, University of Nebraska-LincolnFollow

Date of this Version

January 1991

Comments

NASA Technical Paper 3098

Abstract

Risk-assessment calculations are presented for the preliminary proposed solar minimum and solar maximum orbits for Space Station Freedom (SSF). Integral linear energy transfer (LET) fluence spectra are calculated for the trapped-proton and galactic cosmic ray (GCR) environments. Organ-dose calculations are discussed using the Computerized Anatomical Man model. The cellular track model of Katz is applied to calculate cell survival, transformation, and mutation rates for various aluminum shields. Comparisons between relative biological effectiveness (RBE) and quality factors (QF) for SSF orbits are made, and fluence-dependent effects are discussed.