Dose estimation derived from the exposure to radon, thoron and their progeny in the indoor environment

Ramola, R. C.; Prasad, Mukesh; Kandari, Tushar; Pant, Preeti; Bossew, Peter; Mishra, Rosaline; Tokonami, Shinji

doi:10.1038/srep31061

Cited by 102 publications

(26 citation statements)

References 33 publications

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“…However, F Rn varies in different indoor environments due to variation in environmental parameters (ventilation rate, temperature etc). Further, it is worth highlighting that F Tn varies in the same indoor environment due to the fact of 220 Rn gas is not uniformly distributed in a room but 220 Rn progeny having relatively high half-life is uniformly distributed 39 . Hence, it is problematic to define season wise F Tn due to the difference in physical properties of 220 Rn and its progeny.…”

Section: Resultsmentioning

confidence: 99%

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

Bangotra

Mehra

Jakhu

et al. 2019

Sci Rep

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This study summarizes the seasonal experimental data on the activity concentrations of indoor 222 Rn (Radon), 220 Rn (Thoron) and their progeny in Mansa and Muktsar districts of Punjab (India) using LR-115 solid state nuclear track detector based time integrated pin-hole cup dosimeters and deposition based progeny sensors for the assessment of radiological dose. The indoor 222 Rn concentration was observed higher in the rainy and winter seasons while 220 Rn concentration was observed higher in the winter season. However, Equilibrium Equivalent Concentrations (EECs) of 222 Rn and 220 Rn exhibited distinct seasonal behaviour unlike their parent nuclides. The average equilibrium factors for 222 Rn (F Rn ) and 220 Rn (F Tn ) were found 0.47 ± 0.1 and 0.05 ± 0.01, respectively. The annual arithmetic means of unattached fractions of 222 Rn ( ) and 220 Rn ( ) were found to be 0.09 ± 0.02 and 0.10 ± 0.02, respectively. The attachment rate ( X Rn ) and attachment rate coefficients ( β ) of 222 Rn progeny were also calculated to understand the proper behaviour of progeny species in the region. A new alpha flux based technique has been proposed and used for the assessment of absorbed dose rate and annual effective dose rate for radiation protection purpose.

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Section: Resultsmentioning

confidence: 99%

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

Bangotra

Mehra

Jakhu

et al. 2019

Sci Rep

Self Cite

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“…Dose rates can be estimated in different ways [19][20]. To summarize the results of the measurements in this study, we used the distribution laws of random variables of the measured values of dose rate.…”

Section: Methodsmentioning

confidence: 99%

Development of measures to protect the population and prevent pollution based on the study of the radiation background of the object

2019

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In the modern world, the energy of the atom is used in industry, medicine and other spheres of human activity. However, the usage of radioactive substances can have a negative impact on the environment, the health of workers and the public. Therefore, it is important to keep a close watch on the radiation situation in the immediate vicinity of facilities where radioactive substances are used or stored. These can be nuclear power plants and industrial enterprises, as well as areas with a naturally elevated background radiation level. In this paper, a study of the background radiation of the object of possible radioactive contamination – Gatchina Palace in Gatchina, Leningrad region was carried out. On the basis of measurements made, we have performed the calculation of the annual radiation doses of staff and tourists, as well as issued recommendations to ensure the radiation safety of employees and visitors of the Gatchina Palace.

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“…In general, the equilibrium factor (F), which is the ratio of the concentration of radon/thoron in a non-equilibrium state to the concentration of radon/thoron and progeny in an equilibrium state, must be taken into consideration when using concentrations of radon and thoron in the atmosphere. The equations for computing the equilibrium equivalent concentration (EEC) and the internal dose using the EEC are as follows [3,5].…”

Section: Dose Assessment Of Internal Exposure To Radon and Thoronmentioning

confidence: 99%

Health effects of exposure to radon: implications of the radon bed mattress incident in Korea

Seo

Kang

et al. 2019

Epidemiol Health

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Radon is a naturally occurring radioactive material formed by the slow decay of uranium and thorium found in the earth’s crust or construction materials. Internal exposure to radon accounts for about half of the natural background radiation dose to which humans are exposed annually. Radon is a carcinogen and is the second leading cause of lung cancer following smoking. An association between radon and lung cancer has been consistently reported in epidemiological studies on mine workers and the general population with indoor radon exposure. However, associations have not been clearly established between radon and other diseases, such as leukemia and thyroid cancer. Radiation doses are assessed by applying specific dose conversion coefficients according to the source (e.g., radon or thoron) and form of exposure (e.g., internal or external). However, regardless of the source or form of exposure, the effects of a given estimated dose on human health are identical, assuming that individuals have the same sensitivity to radiation. Recently, radiation exceeding the annual dose limit of the general population (1 mSv/yr) was detected in bed mattresses produced by D company due to the use of a monazite-based anion powder containing uranium and thorium. This has sparked concerns about the health hazards for mattress users caused by radiation exposure. In light of this event, this study presents scientific information about the assessment of radon and thoron exposure and its human implications for human health, which have emerged as a recent topic of interest and debate in society.

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Dose estimation derived from the exposure to radon, thoron and their progeny in the indoor environment

Cited by 102 publications

References 33 publications

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

Quantification of an alpha flux based radiological dose from seasonal exposure to 222Rn, 220Rn and their different EEC species

Development of measures to protect the population and prevent pollution based on the study of the radiation background of the object

Health effects of exposure to radon: implications of the radon bed mattress incident in Korea

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