Radiation exposure limits for Japanese astronauts
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Updated: Oct 18, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
T Abe1, T Komiyama, T Suemitsu
1Medical Research and Operations Office, Space Utilization Promotion Department, National Space Development Agency of Japan, 2-1-1 Sengen, Tsukuba, Japan. abe.takahiro@nasda.go.jp
Abstract:
Starting in 2001, Japanese astronauts will live aboard the International Space Station (ISS) for 3 to 6 months a year. For astronauts, space radiation is primarily hazardous. Therefore, the National Space Development Agency of Japan (NASDA) is developing a system for Space Radiation Safety Operations. This report describes our overall image of Space Radiation Safety Operations aboard the ISS, especially our proceedings in drafting the "Space Radiation Exposure Limits for Japanese ISS Astronauts."
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