Comparison of radon lung dosimetry models for the estimation of dose uncertainties.
In order to investigate the degree of dose uncertainty produced by different models, three dosimetry models were compared with each other, representing different classes of models: (i) The RADEP/IMBA model based on the ICRP Human Respiratory Tract Model, a deterministic regional compartment model, (ii) the RADOS model, a deterministic airway generation model and (iii) the IDEAL dosimetry model, a stochastic airway generation model. The outputs of the three models for defined mining exposure conditions were compared at three different levels: deposition fractions for attached and unattached radon progeny; nuclear transformations, reflecting the combined effect of deposition and clearance; and resulting cellular doses. Resulting dose exposure conversion factors ranged from 7.8 (median) mSv/WLM (IDEAL) to 11.8 mSv/WLM (RADEP/IMBA), with 8.3 mSv/WLM (RADOS) as an intermediate value. Despite methodological and computational differences between the three models, resulting dose conversion factors do not appreciably differ from each other, although predictions by the two generation models are consistently smaller than that for the RADEP/IMBA model.
Winkler-Heil
Renate
R
Division of Physics and Biophysics, Department of Materials Engineering and Physics, University of Salzburg, Hellbrunner Str. 34, 5020 Salzburg, Austria.
Hofmann
Werner
W
Marsh
James
J
Birchall
Alan
A
D000336:Aerosols / Q000032:analysis / Q000493:pharmacokinetics*; D003198:Computer Simulation; D006801:Humans; D019570:Inhalation Exposure / Q000032:analysis*; D008168:Lung / Q000378:metabolism*; D008954:Models, Biological; D009928:Organ Specificity; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D011886:Radon / Q000032:analysis* / Q000493:pharmacokinetics*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D000336:Aerosols; D011886:Radon