| Autor: |
Phachirarat Sola, Uthaiwan Injarean, Butsawan Bidorn, Supalak Kongsri, Ritiron Samran, Nopparit Changkit |
| Předmět: |
|
| Zdroj: |
Maejo International Journal of Science & Technology; Sep-Dec2022, Vol. 16 Issue 3, p98-111, 14p |
| Abstrakt: |
Naturally occurring radioactive materials were assessed in sand and sea water along the coastline to the east of Map Ta Phut Industrial Estate, the largest petrochemical base in Thailand. Concentrations of 226Ra, 232Th and 40K activities in sand and sea-water samples collected from Pradu Bay were measured using a gamma-ray spectrometer, while radon gas (222Rn) concentration in sea-water samples was measured using a RAD7 portable radon detector complete with a set of RAD7-H2O accessories. Radiation hazard indices such as radium equilibrium (Raeq), absorbed outdoor external dose rate (Dout) and annual outdoor effective dose rate (Eout) were estimated to evaluate radiation risks for humans and the environment along the coastline to the east of the Industrial Estate. Results indicate lower radioactive concentrations of 226Ra, 232Th, 40K and 222Rn in sea-water samples than the recommended values in drinking water. Most sand samples contain lower 226Ra, 232Th and 40K activity concentrations than the guideline, while the values of Eout in sand samples are below the recommended limit. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
