Environmental radioactivity evaluation in the coastal stretch of Bay of Bengal from Pondycherry to Velanganni (South East coast of India)

Satheeshkumar, G; Hameed, P. Shahul; Pillai, G. Sankaran; Anbusaravanan, N

doi:10.4103/0972-0464.112351

Cited by 6 publications

(4 citation statements)

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“…But in our work, we considered the products of thoron decay in order to be able to assess under what conditions they can significantly affect the gamma background (the degree of their influence under different conditions). For example, in some rocks of volcanic origin the content of 232 Th reaches activities up to 550 Bq/kg, and in zirconium sands also called "black sands", which as a result of sea surf accumulation on the coast of some regions of Brazil, India, and other countries, there can be a high content of 232 Th up to 15-20 kBq/kg and more [9][10][11]. In India, 232 Th has been detected with specific activity up to 1075 Bq/kg on the Karaikal coast [10].…”

Section: Choice Of Dose-forming Radionuclides For Modelingmentioning

confidence: 99%

“…For example, in some rocks of volcanic origin the content of 232 Th reaches activities up to 550 Bq/kg, and in zirconium sands also called "black sands", which as a result of sea surf accumulation on the coast of some regions of Brazil, India, and other countries, there can be a high content of 232 Th up to 15-20 kBq/kg and more [9][10][11]. In India, 232 Th has been detected with specific activity up to 1075 Bq/kg on the Karaikal coast [10].…”

Section: Choice Of Dose-forming Radionuclides For Modelingmentioning

confidence: 99%

“…This is true if the specific activity of 238 U ( 226 Ra) and 232 Th in the soil does not differ much. However, there are areas where the 232 Th content in soil or building structures of residential or public buildings is rather high [9][10][11]. This can lead to a strong increase in the activity of thoron decay products in the atmosphere and radiation background.…”

Section: Introductionmentioning

confidence: 99%

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Geant4 Simulation of Precipitated Activity-to-γ-Dose Rate Conversion Factors for Radon and Thoron Decay Products

et al. 2022

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The results of modeling the conversion factor from rainfall-deposited unit activity of gamma-emitting radon and thoron daughter decay products to their created gamma-radiation dose rate as a function of height above the Earth’s surface using the Geant4 toolkit are presented in this paper. Thin layers of water, soil, and air, with the height of 0.1–10 mm, are considered as the source in order to examine whether the composition of the radiation source environment affects the simulation result. Cases with different absorber-atmosphere densities are simulated. The contribution of each radionuclide 212Bi, 214Bi, 212Pb, 214Pb and 208Tl to the total gamma background was determined. The dependence of dose rate growth during the precipitation period on the detector position in relation to the area covered by precipitation was investigated numerically. The obtained conversion factors are universal values, because do not depend on soil type (material) on which radionuclides are deposited by precipitation. These coefficients can be used for solving both direct tasks of radiation background recovery during precipitation and inverse tasks of determining the intensity and amount of precipitation by the known gamma background, as well as tasks to decipher the gamma background by the shape of the response to various phenomena. Also in this work, it is shown how thoron decay products can affect the response shape of gamma background on atmospheric precipitation.

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Section: Choice Of Dose-forming Radionuclides For Modelingmentioning

confidence: 99%

Section: Choice Of Dose-forming Radionuclides For Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geant4 Simulation of Precipitated Activity-to-γ-Dose Rate Conversion Factors for Radon and Thoron Decay Products

et al. 2022

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“…Radiological investigations have been carried out by many authors in small stretches along Tamil Nadu (TN) coast [4,9,15,23,30,31,45,51,55,57], as per their specific mandate. In order to have the background data for the entire TN coastline, the current study carried out.…”

Section: Introductionmentioning

confidence: 99%

Application of multivariate technique to evaluate spatial distribution of natural radionuclides along Tamil Nadu coastline, east coast of India

et al. 2019

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The study focuses on the spatial mapping of naturally occurring radionuclides along entire Tamil Nadu coast, which constitute nearly 30% of the east coast of India. In view of this, a total of 37 beach sediment samples are collected, and spectral measurement was carried out by High Purity Germanium detector. The average activity concentrations were found to be in the range of 34.33 ± 32.94 Bq kg −1 for 238 U, 51.55 ± 40.39 Bq kg −1 for 238 Th and 282.59 ± 84.45 Bq kg −1 for 40 K. The contour maps showed the spatial distributions of each radionuclide and were drawn using the kriging method. Box-whisker plot shows the variation of activity concentrations of radionuclides, which follows the order 40 K > 232 Th > 238 U in all the sediment samples. To understand the complex relationships among the radioactive variables and its environmental classifications, a multivariate statistical technique such as correlation matrices, and cluster analysis were applied to the radioactive data sets.

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Effect of natural radioactivity along the southern coastal area of Tamil Nadu with statistical approach

Chandrasekaran,

Rahman

2024

J Radioanal Nucl Chem

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Environmental radioactivity evaluation in the coastal stretch of Bay of Bengal from Pondycherry to Velanganni (South East coast of India)

Cited by 6 publications

References 0 publications

Geant4 Simulation of Precipitated Activity-to-γ-Dose Rate Conversion Factors for Radon and Thoron Decay Products

Geant4 Simulation of Precipitated Activity-to-γ-Dose Rate Conversion Factors for Radon and Thoron Decay Products

Application of multivariate technique to evaluate spatial distribution of natural radionuclides along Tamil Nadu coastline, east coast of India

Effect of natural radioactivity along the southern coastal area of Tamil Nadu with statistical approach

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