Estimation of radon and thoron caused dose at exraction and processing sites of mineral sand mining area in Vietnam (HA TINH province)

Dung, Bui Dac; Giap, Trinh Van; Kovács, Tibor; Toan, Tran Ngoc; Cuong, Le Dinh; Minh, Tran Khanh; Quyet, Nguyen Huu; Khánh, Nguyễn Văn

doi:10.1007/s10967-013-2917-9

Cited by 10 publications

(1 citation statement)

References 6 publications

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“…They are formed as positive ions or atoms, which are able to deposit on surfaces or attach to the particles of room air. The airborne radon decay products deposit in the human respiratory tract by inhalation and damage the sensitive tissues of the respiratory tract [2][3][4][5]. It is essential to evaluate the characteristics of the radon progenies because the dose is strongly dependent on the location of radioactive aerosol deposition in the respiratory tract and hence on the aerosol size distribution of the aerosol particles [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Behaviour Analysis of Indoor Radioactive Aerosols

Tokonami

2023

FSAR

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The deposition of radioactive aerosols from radon daughter, which are potentially harmful to human health. The inhalation of short-lived radon decay products (RnPs) yields the greatest contribution to natural radiation exposure. This research deals with a study carried out to improve the knowledge of the behaviour of RnPs, their interaction with particulates and the plate-out during the time. The tests confirmed that a high aerosol particle concentration increases the probability that an ion sticks to aerosol and remains long in the air, leading to both an increase in equilibrium factor (F) and a decrease of unattached fraction (f p ). The results performed in a radon calibration chamber (free of particles) showed a reduction of F (and the average of ~ 0.1 %) because in an environment the plate-out phenomenon prevails over the attachment to particulate. Besides, the high circulation fan speed (~2.9 ms -1 ) in the radon calibration chamber has been a more significant effect on the plate-out of attached radon progeny (~0.040±0.002 Bq cm -2 h -1 ).

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