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SHORT-TERM ANNUAL VARIATIONS OF RADON CONCENTRATION IN WORKPLACES: SOME RESULTS IN A RESEARCH INSTITUTE.

G Venoso1, M Ampollini1, S Antignani1

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Annual radon concentration measurements in workplaces show higher year-to-year variability than in homes. This finding suggests current regulations may need re-evaluation for accurate radon exposure assessment in occupational settings.

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Area of Science:

  • Environmental Health
  • Occupational Safety
  • Radiological Protection

Background:

  • International and national regulations, such as the 2013/59/Euratom Council Directive, often rely on annual average indoor radon concentration for workplace safety.
  • A single annual measurement may not accurately represent long-term radon exposure due to significant year-to-year variations.
  • Limited data exists on annual radon concentration variability specifically within workplace environments.

Purpose of the Study:

  • To evaluate short-term annual variations in indoor radon concentration in a research institute.
  • To compare radon variability in workplaces with that observed in residential dwellings.

Main Methods:

  • Radon concentration was measured over one year in 120 rooms across 23 buildings at a research institute.
  • Two separate one-year measurements were conducted in each room, with up to a three-year interval between them.
  • Data from these measurements were compared to existing data from dwellings in the same geographical area.

Main Results:

  • The study revealed higher variability in radon concentrations between the two annual measurements in workplaces compared to dwellings.
  • This indicates that year-to-year radon levels in occupational settings can fluctuate more than previously assumed.
  • The findings highlight potential limitations in using single annual measurements for regulatory compliance.

Conclusions:

  • Indoor radon concentration exhibits significant annual variations in workplaces, exceeding those found in residential settings.
  • Current regulatory approaches based on single annual averages may require refinement to account for this variability.
  • Further research is necessary to confirm these findings and expand the investigation to diverse workplace types.