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Radiation Sources

There are many sources of ionizing radiation and conditions in which employees can be exposed. Exposure can result from natural sources, such as radioactive materials that exist in the soil, and from cosmic sources (the sun). Workers can also be exposed to radiation from sources that are a result of human activity. For instance, exposure to ionizing radiation can result from equipment that emits radiation, such as X-ray machines.

Radiation sources include:

  • Natural radiation
  • Man-made radiation
  • NORM
  • TENORM

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