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Area of Science:

  • Environmental Health
  • Occupational Safety
  • Radiation Physics

Background:

  • Radon exposure in workplaces is a significant concern for occupational radiation exposure.
  • Understanding radon concentrations is vital for assessing health risks to workers.

Purpose of the Study:

  • To determine radon concentrations experienced by Finnish workers.
  • To estimate the number of workers exposed to excessive radon levels.

Main Methods:

  • Integrated and continuous radon measurements in 700 and 334 workplaces, respectively.
  • Calculation of occupational radon concentration using seasonal and ventilation correction factors.
  • Probabilistic modeling to estimate workers exceeding the reference level of 300 Bq m⁻³.

Main Results:

  • Geometric and arithmetic mean radon concentrations in above-ground workplaces were 41 and 91 Bq m⁻³, respectively.
  • Estimated mean annual radon concentrations for Finnish workers were 19 and 33 Bq m⁻³.
  • Approximately 34,000 workers in Finland are estimated to exceed the 300 Bq m⁻³ reference level.

Conclusions:

  • Radon exposure in Finnish workplaces is the primary source of occupational radiation exposure.
  • Despite generally low levels, a substantial number of workers are exposed to high radon concentrations.
  • Workplace radon monitoring and mitigation are essential for protecting worker health.