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Published: 2020-03-15
Abstract Views: 159
Views PDF: 61
DOI: https://doi.org/10.53747/jnst.v10i1.29
Issue
Vol. 10 No. 1 (2020)
Section
Articles
How to Cite
Nguyen Van, P., Le Nhu, S., Tran Dinh, K., Nguyen Dinh, T., Nguyen Thi Thanh, N., & Truong, Y. (2020). Deposition velocities of some natural radionuclides from the atmosphere at Ninh Thuan and Dong Nai of Vietnam. Nuclear Science and Technology, 10(1), 31-39. https://doi.org/10.53747/jnst.v10i1.29

Deposition velocities of some natural radionuclides from the atmosphere at Ninh Thuan and Dong Nai of Vietnam

Nguyen Van Phu1, Le Nhu Sieu1, Tran Dinh Khoa1, Nguyen Dinh Tung1, Nguyen Thi Thanh Nga1, Truong Y1
1 Dalat Nuclear Research Institute

Main Article Content

Abstract

The deposition velocities of Be-7, K-40, Th-232, U-238 and Pb-210 radionuclides from the atmosphere at Ninh Thuan and Dong Nai monitoring stations of Vietnam were investigated. The deposition velocity was calculated based on it’s specific radioactivity in aerosols and deposition density in fallout samples. The data of the deposition velocities of radionuclides from the atmosphere are needed as input data for the models to simulate atmospheric radioactive dispersion and assess the public dose around nuclear facilities. The radioactivity of Be-7, K-40, Th-232, U-238 and Pb-210 nuclides in aerosols and fallout samples were analyzed by using a low level background gamma spectrometer equipped with HPGe detector of high resolution. The results show that the deposition velocities of Be-7, K-40, Th-232, U-238 and Pb-210 nuclides from the air are in ranges of 0.04÷1.71; 1.84÷27.46; 1.46÷23.63; 0.80÷26.13 and 0.06÷1.53 (cm/s), with average values of 0.55; 13.81; 8.22; 8.12 and 0.58 (cm/s), respectively. The deposition velocities of the radionuclides in the survey areas are comparable with those found in tropical and subtropical regions and these results could be served as the database of the World radioactive transport parameters.

Article Details

Keywords

Deposition velocity, natural radioactivity, deposition density, aerosol, fallout

References

[1]. Station of Chemical and Radioactive Environment Monitoring and Analysis No. 3, Nuclear Research Institute, Report on the implementation of Annually National Projects: “Monitoring and analyzing environmental radioactivity at 8 monitoring points: Dalat, Ninh Thuan, Hochiminh city, Binh Thuan, Vung Tau, Ca Mau, Tay Ninh and Bac My Thuan (Tien Giang)”.
[2]. Laboratory of Environmental Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-BK-03: 2017.
[3]. Laboratory of Environmental Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-RL-05: 2017.
[4]. R. L. Lozano, E. G. San Miguel, J. P. Bolívar, and M. Baskaran, “Depositional fluxes and concentrations of 7Be and 210Pb in bulk precipitation and aerosols at the interface of Atlantic and Mediterranean coasts in Spain”, Journal of Geophysical Research, Vol. 116, D18213, 2011.
[5]. Naofumi Akata, Yoshitaka Shiroma, Norihiro Ikemoto, Akemi Kato, Miklos Hegedus, Masahiro Tanaka, Hideki Kakiuchi and Tibor Kovacs, “Atmospheric Concentration and Deposition Flux of Cosmogenic Beryllium-7 at Toki, Central Part of Japan”, Radiation Environment and Medicine Vol.7, No.1, 47-52, 2018.
[6]. D. McNeary and M. Baskaran, “Depositional characteristics of 7Be and 210Pb in southeastern Michigan”, Journal of Geophysical Research, Vol. 108, No. D7, 4210, 2003.