Radon Exposure Concentrations in Finnish Workplaces

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.