MCNPX evaluation of gamma spectrometry results in high radon concentration areas
Language English Country Great Britain, England Media print-electronic
Document type Evaluation Study, Journal Article, Research Support, Non-U.S. Gov't
PubMed
24729561
DOI
10.1093/rpd/ncu108
PII: ncu108
Knihovny.cz E-resources
- MeSH
- Radon Daughters MeSH
- Caves chemistry MeSH
- Humans MeSH
- Monte Carlo Method * MeSH
- Radiation Monitoring * MeSH
- Radioactive Pollutants analysis MeSH
- Radon analysis MeSH
- Spectrometry, Gamma instrumentation methods MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Evaluation Study MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Radon Daughters MeSH
- Radioactive Pollutants MeSH
- Radon MeSH
The radon concentration in underground workplaces may reach tens of thousands of Bq m(-3). A simple MCNPXTM Monte Carlo (MC) model of a cave was developed to estimate the influence of radon on the in situ gamma spectrometry results in various geometries and radon concentrations. The detector total count rate was obtained as the sum of the individual count rates due to 214Bi in the air, radon in the walls and deposition of radon daughters on surfaces. The MC model was then modified and used in the natural conditions of the Mladeč Caves, Czech Republic. The content of 226Ra was calculated from laboratory gamma spectrometry measurements, and the concentrations of unattached and attached 214Bi were measured using the FRITRA4 device (SMM-Prague). We present a comparison of the experimental results with results calculated by the MCNPXTM model of the Gamma Surveyor spectrometry probe (GF Instruments) with a 3″×3″ NaI(Tl) detector and a 2″×2″ BGO detector.
CTU Prague FNSPE DDAIR Břehová 7 115 19 Praha 1 Czech Republic
Czech Metrology Institute Radiová 1 102 00 Praha 10 Czech Republic
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