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RADON DOSIMETRY FOR WORKERS: ICRP'S APPROACH.

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The International Commission on Radiological Protection (ICRP) recommends a dose coefficient of 12 mSv/WLM for radon progeny exposure in workplaces. This guidance aids in managing occupational radon risks and lung cancer, aligning with new ICRP publications.

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Area of Science:

  • Radiological Protection
  • Occupational Health
  • Environmental Health

Background:

  • Recent International Commission on Radiological Protection (ICRP) publications (115, 126) address radon exposure and lung cancer risks.
  • ICRP is releasing Occupational Intakes of Radionuclides (OIR) Part 3, providing dose coefficients for radon and thoron.
  • Existing regulations and directives (e.g., European directive 2013/59/EURATOM) guide radon management in workplaces.

Purpose of the Study:

  • To discuss the application and rationale behind the ICRP's recommended dose coefficient for inhaled radon progeny.
  • To present preliminary dose calculation results for indoor workplaces and mines.
  • To outline a general approach for managing occupational radon exposure based on ICRP and European guidelines.

Main Methods:

  • Utilizing ICRP reference biokinetic and dosimetric models for calculating effective dose coefficients.
  • Employing dosimetry and epidemiological data to establish a reference dose coefficient.
  • Performing preliminary dose calculations for specific workplace environments (indoor and mines).

Main Results:

  • A single dose coefficient of 12 mSv per working level month (WLM) is recommended by ICRP for inhaled radon progeny in most situations.
  • Site-specific dose coefficients can be calculated using provided dosimetric data and measured aerosol parameters.
  • Preliminary dose calculations for indoor workplaces and mines have been performed.

Conclusions:

  • The recommended ICRP dose coefficient provides a practical tool for assessing and managing occupational radon exposure.
  • A graded approach to radon control in workplaces is advised, requiring dose assessment in certain scenarios.
  • The findings support integrated radon management strategies in line with international and European regulations.