|
|
 |
| |
|
|
|
Determination of Radioactivity Levels and Radiation Hazards in Coastal Sediment Samples of Chennai Coast, Tamilnadu, India using Gamma Ray Spectrometry with Statistical Approach |
|
|
|
PP: 171-182 |
|
|
|
doi:10.18576/jrna/030307
|
|
|
|
Author(s) |
|
|
|
M. Tholkappian,
A. Chandrasekaran,
Durai Ganesh,
J.Chandramohan,
N. Harikrishnan,
R. Ravisankar,
|
|
|
|
Abstract |
|
|
| Radioactivity of the sediment environment is one of the main sources of exposure to humans. The concentration of radionuclides in marine sediments can provide very useful information on the source, transport mechanisms and environmental fate of radionuclides. In this work, the coastal sediment samples are addressed to find out any radiation hazard associated with the sediments. The sediment samples were collected from Pulicatlake to Vadanemeli of Chennai coast, Tamilnadu using Peterson grab sampler from 10 m water depths parallel to the seashore line. Gamma radiation measurements were performed using NaI(Tl) detector PC multichannel Spectrometer. The specific activity concentration of radionuclides Uranium (238U), Thorium (232Th) and Potassium (40K) were investigated and mean specific activity values 238U (10.14 Bq kg-1), 232Th (35.02 Bq kg-1) and 40K (425.8 Bq kg-1) were tabulated. The average activity of 232Th is slightly greater than the world average value. The assessment of radiation hazard associated with the sediment is computed using the radiation indices like Radium Equivalent Activity (Raeq), Absorbed Gamma Dose Rates in air (DR), the Annual Effective Dose Equivalent (AEDE), Annual Gonadal Dose Equivalent (AGDE), Representative level index (RLI), Activity Utilization Index (AUI), Internal Hazard Index (Hint), External Hazard Index (Hext), and Excess Lifetime Cancer (ELCR) is compared with internationally recommended values and safety limits. The multivariate statistical analysis has been carried out for the radiological data and it is used to find out any existing relationship between radioactive variables. The results of these investigations are presented and discussed in this paper. |
|
|
|
|
|
|
|
