NATURALLY OCCURRING RADIONUCLIDES IN SOIL SAMPLES OF BURETI SUB-COUNTY OF KERICHO COUNTY KENYA
| Autor: | C Nyambura, M. W. Chege, N. O. Hashim, C K Rotich |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Soil test
Potassium Radioisotopes Radiation hazard Radiation Dosage Effective dose (radiation) 030218 nuclear medicine & medical imaging 03 medical and health sciences Soil 0302 clinical medicine Animal science Radiation Monitoring Activity concentration Humans Soil Pollutants Radioactive Radiology Nuclear Medicine and imaging Radioisotopes Radionuclide Radiation Radiological and Ultrasound Technology Thorium Public Health Environmental and Occupational Health General Medicine Kenya Radiation exposure 030220 oncology & carcinogenesis Radiation monitoring Environmental science Dose rate Radium |
| Zdroj: | Radiation protection dosimetry. 192(4) |
| ISSN: | 1742-3406 |
| Popis: | The activity concentration of soil samples of Bureti sub-county was measured using thallium-activated sodium iodide detector. To ascertain the level of radiation hazard to the public, gamma radiation dose rates were also estimated. The average activity concentration due to 40K, 226Ra and 232Th for soil samples are 1164 ± 70, 106 ± 8 and 79 ± 5 Bqkg−1, respectively. An average dose rate of 145 ± 10 nGyh−1 was recorded, which is about 2.5 times higher than the world average value of 60 nGyh−1(UNSCEAR). On the other hand, an average outdoor effective dose of 0.35 ± 0.02 mSvy−1 was measured, which is lower than the ICRP safety limit of 1 mSvy−1. This shows that the radiation hazards from naturally occurring terrestrial radionuclides in Bureti is low and therefore human radiation exposure is within the accepted limits. |
| Databáze: | OpenAIRE |
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