Indoor radon (222Rn) concentration measurements in Cyprus using high-sensitivity portable detectors

Anastasiou, Tassos; Tsertos, H.; Christofides, Stelios; Christodoulides, George

doi:10.1016/s0265-931x(03)00052-3

Cited by 42 publications

(37 citation statements)

References 10 publications

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“…A pilot project was therefore initiated aiming at systematically measuring the terrestrial gamma radiation in Cyprus and at determining its contribution to the annual effective dose equivalent to the population. Other part of the project includes measurement of radon concentration in houses and public buildings (Anastasiou et al, 2002) as well as the detection of α−emitting radioisotopes by utilizing radioanalytic techniques and high-resolution α-spectroscopy. In this paper, the first results from natural gamma radiation measurements in all the types of geological rock formations appearing in Cyprus (Figure 1) are presented.…”

Section: Introductionmentioning

confidence: 99%

Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks

Tzortzis

Tsertos

Christofides

et al. 2003

Radiation Measurements

222

106

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Using high-resolution γ−ray spectroscopy, the terrestrial gamma radiation in all the predominant types of geological rock formations appearing in Cyprus was measured. Soil samples were collected from each rock type, sealed in 1-litre plastic Marinelli beakers, and measured in the laboratory for 24 hours each. From the measured γ−ray spectra, activity concentrations were determined for 232 Th (range from 1.3 to 52.8 Bq kg −1 ), 238 U (from 0.9 to 90.3 Bq kg −1 ) and 40 K (from 13 to 894 Bq kg −1 ). Elemental concentrations mean values of (2.8 ± 0.7) ppm, (1.3 ± 0.3) ppm and (0.6 ± 0.1) % were extracted, for thorium, uranium and potassium, respectively. Absorbed dose rates in air outdoors were calculated to be in the range of 0.1−50 nGy h −1 , depending on the geological features, with an overall mean value of (14.7 ± 7.3) nGy h −1 . The corresponding effective dose rates per person outdoors were estimated to be between 0.1 and 61.4 µSv y −1 , assuming a 20% occupancy factor.

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Section: Introductionmentioning

confidence: 99%

Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks

Tzortzis

Tsertos

Christofides

et al. 2003

Radiation Measurements

222

106

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“…Other parts of the project aimed at measuring the concentration of radon in houses and public buildings (Anastasiou et al, 2003), as well as at detecting α−emitting radioisotopes by utilising radioanalytical techniques and high-resolution α-spectrometry (Pashalidis and Tsertos, 2003). In this paper, the results from this extensive survey regarding Th, U and K elemental concentrations in a wide variety of surface soils by means of high-resolution γ−ray spectrometry are presented.…”

Section: Introductionmentioning

confidence: 99%

Determination of thorium, uranium and potassium elemental concentrations in surface soils in Cyprus

Tzortzis

Tsertos

2004

Journal of Environmental Radioactivity

162

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A comprehensive study was conducted to determine thorium, uranium and potassium elemental concentrations in surface soils throughout the accessible area of Cyprus using high-resolution γ−ray spectrometry. A total of 115 soil samples was collected from all over the bedrock surface of the island based on the different lithological units of the study area. The soil samples were air-dried, sieved through a fine mesh, sealed in 1000-mL plastic Marinelli beakers, and measured in the laboratory in terms of their gamma radioactivity for a counting time of 18 hours each. From the measured γ−ray spectra, elemental concentrations were determined for thorium (range from 2.5×10 −3 to 9.8 µg g −1 ), uranium (from 8.1×10 −4 to 3.2 µg g −1 ) and potassium (from 1.3×10 −4 to 1.9 %). The arithmetic mean values (A.M. ± S.D.) calculated from all samples are:(1.2 ± 1.7) µg g −1 , (0.6 ± 0.7) µg g −1 , and (0.4 ± 0.3) %, for thorium, uranium and potassium, respectively, which are by a factor of three to six lower than the world average values of 7.4 µg g −1 (Th), 2.8 µg g −1 (U) and 1.3 % (K) derived from all data available worldwide. The best-fitting relation between the concentrations of Th and K * Corresponding author. E-mail address: tsertos@ucy.ac.cy, Fax: +357-22892821. 2versus U, and also of K versus Th, is essentially of linear type with a correlation coefficient of 0.93, 0.84, and 0.90, respectively. The Th/U, K/U, and K/Th ratios (slopes) extracted are equal to 2.0, 2.8×10 3 , and 1.4×10 3 , respectively.

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“…For this reason, Anastasiou et al (2003) reported that a basement and underground space directly in contact with soil show higher radon concentrations in the airthan other spaces. Li et al (2005) suggested that indoor ventilation is one of the major factors that greatly influence the radon concentration in indoor air.…”

Section: Research Related To Radon Concentrations In Koreamentioning

confidence: 99%

Radon Concentrations in Various Indoor Environments and Effective Doses to Inhabitants in Korea

Lee¹,

Sim²,

Cho³

et al. 2011

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The objective of this study is to offer basic scientific data to support policy decision-making for the improved control of radon and natural radiation gases in Korea, and to provide baseline data on radon for use in cooperative international research. Therefore, this study collected and re-analyzed articles on radon exposure in various indoor environments in Korea that were published in environmental journals since 1980, and estimated the annual exposure and effective radon doses for inhabitants. Among the various indoor environments, the highest pooled average radon concentration of 50.17 ± 4.08 Bq/m 3 (95 % CI: 42.17-58.17 Bq/m 3 ) was found in homes. All of the pooled average radon concentrations estimated in this study were lower than the guideline concentration (148 Bq/m 3 ) recommended by the U.S. EPA and the Korean Ministry of Environment. The annual effective dose received by inhabitants in various indoor environments was estimated to be 1.071 mSv/yr. This is comparable to the annual radon exposure effective dose (1.0 mSv/yr) estimated by UNSCEAR.

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Indoor radon (222Rn) concentration measurements in Cyprus using high-sensitivity portable detectors

Cited by 42 publications

References 10 publications

Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks

Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks

Determination of thorium, uranium and potassium elemental concentrations in surface soils in Cyprus

Radon Concentrations in Various Indoor Environments and Effective Doses to Inhabitants in Korea

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