Article Sidebar

PDF
Published: 2020-06-15
Abstract Views: 152
Views PDF: 63
DOI: https://doi.org/10.53747/jnst.v10i2.36
Issue
Vol. 10 No. 2 (2020)
Section
Articles
How to Cite
Nguyen Dinh, T., Le Nhu, S., Nguyen Van, P., Nguyen Van, P., Tran Dinh, K., Vuong Thi Thu, H., Nguyen Thi Thanh, N., & Le Thi Minh, T. (2020). Radioactivity of some natural and artificial radionuclides in coastal seawater at Ninh Thuan, Ba Ria - Vung Tau and Ca Mau provinces in 2018. Nuclear Science and Technology, 10(2), 44-51. https://doi.org/10.53747/jnst.v10i2.36

Radioactivity of some natural and artificial radionuclides in coastal seawater at Ninh Thuan, Ba Ria - Vung Tau and Ca Mau provinces in 2018

Nguyen Dinh Tung1, Le Nhu Sieu1, Nguyen Van Phuc1, Nguyen Van Phu1, Tran Dinh Khoa1, Vuong Thi Thu Hang1, Nguyen Thi Thanh Nga1, Le Thi Minh Tuyen1
1 Nuclear Research Institute. 01 Nguyen Tu Luc Str., Dalat City, Lamdong Province, Vietnam

Main Article Content

Abstract

Radioactivities of some natural (Ra-226, Th-232, U-238, Po-210) and artificial (Cs-137, Sr-90 and Pu-239,240) radionuclides in coastal seawater at monitoring points of Ninh Thuan, Ba Ria - Vung Tau and Ca Mau provinces were analyzed quarterly in the year of 2018. Radioactivities of Ra-226, Th-232, U-238, and Cs-137 had been determined by simultaneous precipitation method and measured on low-level background gamma spectrometer; the radioactivities of Po-210 and Pu- 239,240 had been analyzed by radiochemical separation method and measured on alpha spectrometer; the radioactivity of Sr-90 had been analyzed by radiochemical separation method and measured on low-level background beta counting system. The ranges of radioactivities of Ra-226, Th-232, U-238, Po-210, Cs-137, Sr-90, and Pu-239,240 were 2.71 ÷ 15.91, 3.45 ÷ 35.93, 3.02 ÷ 21.47, 1.51÷ 6.74, 0.88 ÷ 1.68, 1.08 ÷ 1.86 and 0.0026 ÷ 0.0062 mBq/L, with the average values of 6.37, 12.67, 8.34, 3.29, 1.36, 1.46 and 0.0043 mBq/L, respectively. The results shown that the radioactivities of the above-mentioned radionuclides varied between the seawaters at Ninh Thuan, Ba Ria - Vung Tau and Ca Mau seawater. Additionally, physicochemical parameters in seawater were also surveyed to assess their impact on the fluctuations of the above radionuclides.

Article Details

Keywords

Natural radionuclide, artificial radionuclide, radioactivity in coastal seawate

References

[1]. Ryan, T.P., “Nuclear fallout in the Irish terrestrial environment”, Ph.D. Thesis, Dublin: University College Dublin, 1992.
[2]. Ryan, T.P., Mitchell, P.I., Sanchez-Cabeza, J.A., Smith, V and Vives i Batlle, J., “Distribution of radioactive fallout throughout Ireland. In: Science, Green Issues and the Environment: Ireland and the Global Crisis”. (Eds. D.D.G. McMillan, C.O’Rourke, D.J. Fry and H.D. McMillan), p. 276-283, 1993.
[3]. UNSCEAR, Sources, effects and risks of ionizing radiation, New York: United Nations, 2008.
[4]. Cunningham, J.D., MacNeill, G., Pollard, D., “Chernobyl. Its effect on Ireland”. Dublin: Nuclear Energy Board, 1987.
[5]. European Commission, “Main findings of the Commission’s Article 35 verification in Ireland”, Irish National Monitoring Network for Environmental Radioactivity. Reference of report: IE-07/03, 2008.
[6]. McAulay, I.R. and Moran, “D., Radiocaesium fallout in Ireland from the Chernobyl accident”, Journal of Radiological Protection, Vol. 9, (1), p. 29-32, 1989.
[7]. Laboratory of Environmental Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-NN-13: 2017.
[8]. Laboratory of Environmental Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-N-24:2017.
[9]. Laboratory of Environmental Analyses(VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-NB-26:2014.
[10]. Laboratory of Environmental Analyses(VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-NB-16:2017.
[11]. 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 sea environmental radioactivity in Ninh Thuan Province (2014 – 2017).
[12]. IAEA/RCA/UNDP Project, Asia-Pacific marine radioactivity database (ASPAMARD), http://aspamard.pnri.dost.gov.ph/home, 2018.