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Radiation protection guidelines for space activities.

R J Fry1

  • 1Biology Division, Oak Ridge National Laboratory, TN 37831-8077, USA.

Acta Astronautica
|November 1, 1994
PubMed
Summary
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Space radiation exposure limits need updating due to increased cancer risk estimates and new deep space missions. Current career dose limits may require significant reduction for astronaut safety.

Area of Science:

  • Space exploration
  • Radiation biology
  • Astrobiology

Background:

  • Early space missions faced significant dangers, including radiation risks.
  • Radiation exposure limits for astronauts were established by the U.S.S.R. and U.S.A.
  • Past missions in low-Earth orbit resulted in low astronaut radiation doses.

Purpose of the Study:

  • To address the growing importance of radiation protection guidelines for extended low-Earth orbit and deep space missions.
  • To highlight the need for updated radiation exposure limits for space crews.
  • To emphasize the challenges posed by heavy ions in deep space radiation risk assessments.

Main Methods:

  • Review of historical radiation risk assessments and exposure limits.
  • Analysis of updated risk estimates for radiation-induced cancer.

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  • Consideration of heavy ion risks for deep space missions.

    • Main Results:

    • Recent increases in estimated risks of radiation-induced cancer necessitate revised guidelines.
    • Current career dose limits for astronauts may need to be halved if new risk estimates are applied.
    • Insufficient knowledge exists regarding the risks associated with heavy ions in deep space.

    Conclusions:

    • Astronaut radiation protection guidelines require urgent revision.
    • New deep space missions demand a thorough understanding of heavy ion radiation risks.
    • Updated career dose limits are crucial for ensuring astronaut safety in future space exploration endeavors.