The role of nanosized aerosols of radon decay products in radon dosimetry
Vloga nano aerosolov radonovih razpadnih produktov v dozimetriji radona

english

2007

volume 46, issue 4

Inštitut za varovanje zdravja RS
(Obvezni izvod spletne publikacije)

Aim: In order to demonstrate the difference in dose conversion factors obtained based on epidemiological studies (DCFE) and by applying dosimetric models for mouth (DCFDm) and nasal (DCFDn) breathing the unattached fraction of nanosize radon short-lived decay products (fun) was measured. Methods: Portable SARAD EQF3020 and EQF3020-2 devices were used to continuously measureactivity levels of radon (Rn) and radon short-lived decay products (RnDP) , equilibrium factors between Rn and RnDP, and unattached fractions of RnDP. Measurements were carried out in kindergartens, karst caves and wineries. Conclusion: In kindergartens, fun ranged from 0.03 to 0.24 with a geometric mean of 0.14. DCFDm and DCFDn are higher by a factor of 4.0 and 1.7,respectively, than DCFE = 5 mSv WLM-1. At the lowest point of the PostojnaCave, fun values ranged from 0.54 to 0.68 in summer and from 0.12 to 0.14 in winter. DCFDm is higher than DCFE by a factor of 11.5-14.2 in summer and 3.6-4.0 in winter, while for DCFDn, these factors are 3.1-3.5 and 1.6-1.7,respectively. In wineries, fun values ranged from 0.08 to 0.20; DCFDm and DCFDn are higher than DCFE by factors of 2.8-5.1 and 1.5-1.9, respectively.

16.09.2009