Assessment of occupational exposure from radon in the newly formed underground tourist route under Książ castle, Poland
| Autor: | Lidia Fijałkowska-Lichwa, Tadeusz A. Przylibski |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Biophysics
chemistry.chemical_element Radon Radon measurements 010403 inorganic & nuclear chemistry Radiation Dosage 01 natural sciences 030218 nuclear medicine & medical imaging Radon exposure Tourism 03 medical and health sciences Construction works 0302 clinical medicine Radiation Monitoring Reference level Occupational Exposure Activity concentration Humans Workplace Council directive General Environmental Science Hydrology Radiation protection Effective dose Radiation Ventilation 0104 chemical sciences chemistry Air Pollutants Radioactive Air Pollution Indoor Maximum dose Environmental science Original Article Occupational exposure Poland Seasons |
| Zdroj: | Radiation and Environmental Biophysics |
| ISSN: | 1432-2099 0301-634X |
| Popis: | In the present study, 222Rn activity concentrations in a newly formed underground tourist route under Książ castle, Poland, were investigated for periods undisturbed and disturbed by construction works. This preliminary assessment is based on the almost 3-year long continuous measurements (28 Oct. 2016–02 Jul. 2019) done with an SRDN-3 instrument. In detail described are radon concentrations for periods of renovation (11 Aug. 2018–10 Oct. 2018), opening (15 Oct. 2018–10 Apr. 2019) and operation and monitoring (11 Apr. 2019–02 Jul. 2019) of the facility. It was observed that after the termination of construction work, when natural ventilation returned to the state preceding this work, the absolute values of radon activity concentration decreased. The mean annual radon concentrations were higher than the reference level of radon concentration in underground spaces recommended by IAEA, ICRP, and by the EU Council Directive for workplaces. They reached 1179 Bq/m3 and 943 Bq/m3 in 2017 and 2018, respectively. Cyclically recurring daily changes in radon concentrations occurred only in April and October (so-called transitional periods) and only outside the period of construction work. The results confirmed; however, that these changes need not be considered when planning the work in the tunnel. The minimum effective dose rate from radon exposure occurs in colder periods of the year, from November to the end of March, where the mean effective dose rate value was found to be 0.0003 mSv/h. In contrast, the maximum dose rate of 0.014 mSv/h was observed from April to August. |
| Databáze: | OpenAIRE |
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