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Radiation protection guidelines for space missions.

R J Fry1, D S Nachtwey

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

Health Physics
|August 1, 1988
PubMed
Summary
This summary is machine-generated.

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New radiation protection guidelines for astronauts update the 1970 limits. These revised career dose limits consider sex and age, aiming to reduce cancer risks for spaceflight.

Area of Science:

  • Space radiation safety
  • Astronaut health
  • Radiation biology

Background:

  • Current National Aeronautics and Space Administration (NASA) radiation protection guidelines date from 1970.
  • Advances in understanding space radiation environments and cancer risk estimates necessitate updated guidelines.
  • Inclusion of women astronauts and evolving mission profiles require a re-evaluation of radiation exposure limits.

Purpose of the Study:

  • To re-examine and update the radiation protection guidelines for astronauts.
  • To establish new career dose limits based on current risk assessments and mission-specific radiation environments.
  • To incorporate factors such as age at first exposure and sex into radiation protection recommendations.

Main Methods:

  • Utilized current risk estimates for cancer mortality.
Keywords:
NASA Center JSCNASA Discipline Radiation Health

Related Experiment Videos

  • Analyzed radiation environments within the magnetosphere and for outer space missions, including galactic cosmic rays and heavy ions.
  • Developed new career dose limits based on lifetime excess risk of cancer mortality, considering age and sex.

    • Main Results:

    • New career dose limits range from 1.0 Sv for a 24-year-old female to 4.0 Sv for a 55-year-old male.
    • These limits are significantly lower than the previous single limit of 4.0 Sv.
    • The career limit for the lens of the eye was reduced from 6.0 Sv to 4.0 Sv.

    Conclusions:

    • The updated radiation protection guidelines provide a more nuanced approach to astronaut safety.
    • New limits better reflect current scientific understanding of radiation risks and individual susceptibility.
    • These recommendations aim to ensure the long-term health of astronauts undertaking space missions.