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Biological Hazards Of Radiation Applicable To Man In Space

  • G. J. Neary
  • E. V. Hulse

Abstract

The wide range of possible radiation exposure of man in space is noted , and the biological effects of radiation exposure in general are summarized. It appears that among the early effects, the prodromal symptoms suchas nausea and vomiting may be the limiting factors for an astronaut.

The concept of recovery from radiation injury is discussed and it is concluded that there is no simple correlation between degree of recovery from early effects and the risk of delayed.effects. Detailed data for recovery from early effects is available only for gross injury.

The concept of relative biological effectiveness ( RBE ) of different types of ionizing particle is discussed. Although RBE varies with dose and dose rate, it probably assumes a constant value for any one effect at low doses or dose rates. The best estimate of the values for man are those given by the International Commission on Radiological Protection for use in the range of permissible exposures. Data relevant to high energy protons are given.

The special problem of very heavy particles in space is noted and it is concluded that they are unlikely to be a limiting hazard.

The delayed effects of radiation are reviewed.

Chemical pre-protection of an astronaut appears to be undesirable. Treatment of radiation injury is summarized.

It is concluded that both on general grounds and avoidance of early adverse reactions in flight, the permissible and emergency exposure levels suggested by the International Commission on Radiological Protection for occupationally-exposed persons offer a reasonable guide for planning exposure to man in space.

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Copyright information

© Springer-Verlag Wien 1965

Authors and Affiliations

  • G. J. Neary
    • 1
  • E. V. Hulse
    • 1
  1. 1.Medical Research Council Radiobiological Research UnitHarwellUK

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