Radiation Dose Estimation of Cement Samples Used in Lao PDR

Sonexay Xayheungsy; Le Hong Khiem; Le Dai Nam

doi:10.15625/0868-3166/27/3/10034

Radiation Dose Estimation of Cement Samples Used in Lao PDR

Sonexay Xayheungsy, Le Hong Khiem, Le Dai Nam

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Authors

Sonexay Xayheungsy Faculty of Science, The National University of Laos, Lao PDR and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, VietNam
Le Hong Khiem Institute of Physics, Vietnam Academy of Science and Technology, 10 DaoTan, Ba Dinh, Hanoi, VietNam and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, VietNam
Le Dai Nam Institute of Physics, Vietnam Academy of Science and Technology, 10 DaoTan, Ba Dinh, Hanoi, VietNam and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, VietNam

DOI:

https://doi.org/10.15625/0868-3166/27/3/10034

Abstract

The natural radioactivity due to presence of ²²⁶Ra, ²³²Th and ⁴⁰K radionuclides in Lao PDR cements was measured for first time using a gamma-spectrometry with HPGe detector. Two different types of cement produced by 4 local cement companies in Lao PDR have been investigated. The specific radioactivity of ²²⁶Ra, ²³²Th and ⁴⁰K in the investigated samples ranged from 24.83 ± 1.18 to 54.39 ± 5.90 Bq kg^-1 with a mean of 37.76 ± 10.71 Bq kg^-1, 6.63 ± 1.59 to 21.17 ± 0.48 Bq kg^-1 with a mean of 13.77 ± 5.85 Bq kg^-1and 43.28 ± 7.68 to 168.70 ± 3.34 Bq kg^-1 with a mean of 116.07 ± 47.50 Bq kg^-1, respectively. The radium equivalent activity (Raeq), the gamma-index, the external and internal hazard indices, Absorb Dose Rate in Air (D) and Annual Effective Dose Equivalent (AEDE) were estimated for the radiation hazard of the natural radioactivity in all cement samples. The obtained results were compared with the corresponding values for cement of different countries. The calculated Ra_eq values of Lao PDR samples are lower than the limit of 370 Bq kg^-1 set fo building materials. The mean indoor absorbed dose rate is slightly lower than the population-weighted average of 84 nGy h^-1 while the corresponding effective dose was 79% less than the dose ft of 1 mSv y^-1. The results obtained in this study show no significant radiological hazards arising from using Lao PDR cement for construction of houses.

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Published

10-11-2017

How to Cite

[1]

S. Xayheungsy, L. H. Khiem, and L. D. Nam, “Radiation Dose Estimation of Cement Samples Used in Lao PDR”, Comm. Phys., vol. 27, no. 3, p. 193, Nov. 2017.

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Vol. 27 No. 3 (2017)

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Papers

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