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Review
. 2024 Feb;34(1):31-43.
doi: 10.1016/j.zemedi.2023.10.005. Epub 2023 Nov 28.

Comparison of dose and risk estimates between ISS Partner Agencies for a 30-day lunar mission

Mark R Shavers  1 , Edward J Semones  2 , Vyacheslav Shurshakov  3 , Mikhail Dobynde  3 , Tatsuhiko Sato  4 , Tatsuto Komiyama  5 , Leena Tomi  6 , Jing Chen  7 , Samy El-Jaby  8 , Ulrich Straube  9 , Chunsheng Li  7 , Werner Rühm  10
Affiliations
Review

Comparison of dose and risk estimates between ISS Partner Agencies for a 30-day lunar mission

Mark R Shavers et al. Z Med Phys. 2024 Feb.

Abstract

The International Partner Agencies of the International Space Station (ISS) present a comparison of the ionizing radiation absorbed dose and risk quantities used to characterize example missions in lunar space. This effort builds on previous collaborative work that characterizes radiation environments in space to support radiation protection for human spaceflight on ISS in low-Earth orbit (LEO) and exploration missions beyond (BLEO). A "shielded" ubiquitous galactic cosmic radiation (GCR) environment combined with--and separate from--the transient challenge of a solar particle event (SPE) was modelled for a simulated 30-day mission period. Simple geometries of relatively thin and uniform shields were chosen to represent the space vehicle and other available shielding, and male or female phantoms were used to represent the body's self-shielding. Absorbed dose in organs and tissues and the effective dose were calculated for males and females. Risk parameters for cancer and other outcomes are presented for selected organs. The results of this intracomparison between ISS Partner Agencies itself provide insights to the level of agreement with which space agencies can perform organ dosimetry and calculate effective dose. This work was performed in collaboration with the advisory and guidance efforts of the International Commission on Radiological Protection (ICRP) Task Group 115 and will be presented in an ICRP Report.

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Conflict of interest statement

Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Figures

Figure 1
Figure 1
Example spectra of incident GCR isotopes used by NASA for the 1–30 January, 2013 time frame.
Figure 2
Figure 2
Reference SPE proton spectrum proposed by Townsend, et al. as represented by the Band function parameterizations that were modeled by Tylka, et al. (2010).
Figure 3
Figure 3
Shielding geometry for example (a) cis-lunar mission and (b) lunar surface mission.
See this image and copyright information in PMC

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