Assessments of radioactivity concentration of natural radionuclides and radiological hazard indices in sediment samples from the East coast of Tamilnadu, India with statistical approach

Ravisankar, R.; Chandramohan, J.; Chandrasekaran, A.; Jebakumar, J. Prince Prakash; Vijayalakshmi, I.; Vijayagopal, P; Venkatraman, B.

doi:10.1016/j.marpolbul.2015.05.058

Cited by 151 publications

(37 citation statements)

References 38 publications

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“…For each geological feature, the standard deviation is less than the mean value. Therefore, the statistics indicate high degree of uniformity in the distribution of the dose rates for each geological feature (Ravisankar et al, 2015). The highest mean dose rate 289 nGy h -1 was observed with geological type younger granite, this is in agreement with similar studies conducted by M. Furukawa (1993) and Lai, Hu, Minato, Kodaira, and Tan (1999) whom reported highest dose rate over granitic regions in Japan.…”

Section: Resultssupporting

confidence: 88%

Geological influence on the terrestrial gamma radiation dose rate in Jos Plateau, Nigeria

Abba¹,

Abdulsalam²

2018

Bayero J. Pure App. Sci.

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Natural environmental terrestrial gamma radiation dose (TGRD) rate measurements have been carried out across the geological formations of Jos Plateau, Nigeria. External gamma radiation dose rates ranged between 11 and 714 nGy h TGRD levels and geological type was determined. Statistical comparative method one way analysis of variance (ANOVA) was used to compare the TGRD means for the various results revealed in some instances, significant differences among the mean values of TGRD rates for the different underlying geological structures. Annual effective dose and collective effective dose for the general public due to exp mSv y -1 and 1.20x10 2 mSv y -1 , respectively. Isodose map for exposure rate due to TGRD wasplotted using ArcGIS software. The results will serve as database for natural background radiation for the country.

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Section: Resultssupporting

confidence: 88%

Geological influence on the terrestrial gamma radiation dose rate in Jos Plateau, Nigeria

Abba¹,

Abdulsalam²

2018

Bayero J. Pure App. Sci.

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“…From the comparison Table 1, the 238 U activity was low compared with previous studies by Kannan et al [30], SureshGandhi et al [59] and Ajithra and Shanthi [3], whereas the 232 Th activity was high from the previous studies by Bukhari [15], Ramasamy et al [47], Sivakumar et al [54] and Ravisankar et al [48]. But the present study 40 K activity observed high from the previous studies by Punniyakotti and Ponnusamy [41], Raja [43], Bukhari [15], Ramasamy et al [47] and Ajithra and Shanthi [3].…”

Section: Spatial Distributionmentioning

confidence: 65%

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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“…Indeed, the main radionuclides that cause exposure to a natural source of ionizing radiation are uranium ( 238 U), thorium ( 232 Th) and potassium ( 40 K). By the gamma spectrum, the ambient dose rate is determined at one (01) meter above the ground using the following formula [2] :…”

Section: B Gamma Dose Rate Measurementmentioning

confidence: 99%

Preliminary Study of Gamma Dose Rate Distribution in the Anomaly of the West-Central Region of Burkina Faso: Use of a Portable Gamma Detector

Beogo¹

2019

IJRASET

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Assessments of radioactivity concentration of natural radionuclides and radiological hazard indices in sediment samples from the East coast of Tamilnadu, India with statistical approach

Cited by 151 publications

References 38 publications

Geological influence on the terrestrial gamma radiation dose rate in Jos Plateau, Nigeria

Geological influence on the terrestrial gamma radiation dose rate in Jos Plateau, Nigeria

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

Preliminary Study of Gamma Dose Rate Distribution in the Anomaly of the West-Central Region of Burkina Faso: Use of a Portable Gamma Detector

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