1. Radiation dose calculation of fine and coarse coal fly ash used for building purposes.
- Author
-
Sanjuán, Miguel Ángel, Suarez-Navarro, José A., Argiz, Cristina, and Estévez, Esteban
- Subjects
- *
RADIOACTIVITY , *FLY ash , *COAL ash , *RADIATION doses , *NATURAL radioactivity , *CONSTRUCTION materials - Abstract
Coal fly ash (CFA) samples used in building construction were assessed for natural radioactivity by gamma-ray spectrometry analysis. Activity concentrations in the original CFA sample were 101, 55.5 and 493 Bq kg−1 for 226Ra, 232Th and 40K, respectively. They were compared with the activity concentrations measured in five fineness ranges (from < 45 to > 200 µm). Then, the finer the CFA is, the higher the activity concentrations. Radioactive hazard was assessed for 765 samples collected for 10 years. The annual effective dose was 0.95 mSv y−1 for the fly ash and lower than 1 mSv y−1 for all the scenarios considered for a building material. Therefore, CFA may be used to manufacture building materials safely. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF