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Measurements of radon (222Rn) and thoron (220Rn) exhalations and their decay product concentrations at Indian Stations in Antarctica

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Abstract

During the 33rd summer expedition to the two Indian Stations at Antarctica, Bharati and Maitri, radon and thoron progeny concentrations in indoors and outdoors were measured along with radon (222Rn)/thoron (220Rn) exhalation rate measurements of soil samples, radionuclide content and 222Rn emanation coefficient. This investigation was based on the reports of the higher gamma radiation levels reported around these stations. The results will give an estimate of the radioactivity level as well as the total dose received by personnel carrying out long-term measurements at these stations. Radon and thoron progeny concentrations were measured using direct radon and thoron progeny sensors (DRPS and DTPS). The soil radionuclide content was measured using HPGe gamma spectrometry while radon/thoron exhalation rates were measured using the accumulation method by scintillation radon/thoron monitor. In contrast to a higher radiation field and radioactivity content, studies showed the radon/thoron exhalation rates and progeny concentration to be similar to that measured in normal background areas of other parts of the world. This could be attributed to the ice deposits and the larger atmospheric dispersion, and also to the soil nature which is mainly loamy sands with low clay content contributing to a lower emanation. The results are discussed.

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Acknowledgements

Authors are grateful to Dr. D. Datta, Head, RP&AD, BARC and Dr. K.S. Pradeepkumar, Associate Director, HS&EG, BARC, Mumbai, for their encouragement and support towards this work.

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  1. Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, 400094, Mumbai, India

    Rama Prajith, R. P. Rout, D. Kumbhar, Rosaline Mishra, B. K. Sahoo & B. K. Sapra

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  1. Rama Prajith
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  2. R. P. Rout
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Prajith, R., Rout, R.P., Kumbhar, D. et al. Measurements of radon (222Rn) and thoron (220Rn) exhalations and their decay product concentrations at Indian Stations in Antarctica. Environ Earth Sci 78, 35 (2019). https://doi.org/10.1007/s12665-018-8029-7

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