Radon level and radon effective dose rate determination using SSNTDs In Sannur cave, Eastern desert of Egypt

Amin, Rafat; Eissa, M. F.

doi:10.1007/s10661-007-9957-y

Cited by 15 publications

(4 citation statements)

References 10 publications

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“…Other mechanisms include adsorption on clay and deposition of some forms of organic matter simultaneously with the carbonate sediments. In Table 2, the global average uranium contents of bedrocks and other sedimentary rocks are presented [36]. The presence of minute quantities of uranium in the limestone increases the radon concentration in the cave.…”

Section: Resultsmentioning

confidence: 99%

Geologic Influence on Radon Concentrations Levels in Cave: A Case Study of Mimpi Cave in the Maros Karst of South Sulawesi, Indonesia

Syarbaini,

Kusdiana,

Wahyudi

et al. 2023

Atom Indo.

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Radon gas in the natural environment mainly comes from the release of local bedrock geology and easily accumulate in closed spaces such as basements and caves. This study was performed to investigate the radon concentrations in Mimpi Cave, Bantimurung-Bulusaraung National Park, in the Maros karst area, South Sulawesi, and discussed a possible relationship between the radon concentrations and the local geology. Measurements were carried out using a passive detection technique with CR-39 nuclear tracks detectors by exposing it for a period of three months. The 222Rn levels measured inside the cave ranges from 64.03 Bq m‑3 to 3396.02 Bq m‑3, with an average value of 1075.05 Bq m‑3.The results are comparable with radon concentration in different caves environments reported from other surveys in several countries. Geological background of the Maros Karst areas could sustain the measured radon values, due to the presence of limestone rock with a mineral composition which can lead to higher radon concentrations in Mimpi Cave.

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Section: Resultsmentioning

confidence: 99%

Geologic Influence on Radon Concentrations Levels in Cave: A Case Study of Mimpi Cave in the Maros Karst of South Sulawesi, Indonesia

Syarbaini,

Kusdiana,

Wahyudi

et al. 2023

Atom Indo.

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“…If a person is exposed for 170 h (one month) to a 1 WL progeny concentration, the exposure is 1 working level month (WLM). 53 In order to calculate the annual WLM, a method, equation (8), proposed by Nazaroff and Nero was used 51 where CRn ind. is the soil radon concentration contributing to indoor radon activity (in Bqm −3 ), t = 8760 is number of hours per year, 1/3700 is a conversation factor (in WL/Bqm −3 ), and 170 is the number of hours per month. While n refers to the fraction of time spending indoors (occupancy), F denotes an indoor equilibrium factor between radon and its decay products.…”

Section: Methodsmentioning

confidence: 99%

Measurement of the radon exhalation rate and effective radium concentration in soil samples of southern Sakarya, Turkey

Tabar

Yakut

Kuş

2016

Indoor and Built Environment

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In the present study, radon exhalation rates in terms of mass and area, as well as the effective radium concentration in soil samples collected simultaneously from different districts of southern Sakarya have been measured by Sealed Can technique using LR-115 type-II detectors. Mass and areal radon exhalation rates in soil samples vary from 35.76 ± 1.5 to 253.15 ± 3.8 mBqkg−1h−1 with an average value of 112.53 ± 2.7 mBqkg−1h−1 and 0.73 ± 0.2 to 5.18 ± 0.6 Bqm−2h−1 with an average value of 2.30 ± 0.6 Bqm−2h−1, respectively. The effective radium content was found to vary in the range 3.77 ± 0.5 to 26.69 ± 1.3 Bqkg−1 with an average value of 11.86 ± 0.9 Bqkg−1. The area exhalation rate was also used to calculate indoor radon concentration contributed by radon exhalation from soil, and to estimate annual effective dose equivalent. While the indoor radon concentration contributed by radon exhalation from soil varies from 2.93 ± 0.9 to 20.73 ± 2.3 Bqm−3 with an average value of 9.22 ± 1.5 Bqm−3, the estimated effective dose equivalent varies from 0.09 to 0.61 mSvy−1 with an average value of 0.27 mSvy−1.

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“…The decay of 226 Ra in soil and rocks generates radon gas and in a closed space such as a cave, it can be presumed that high radon concentrations will be observed due to the stagnant air. In fact, radon concentrations of a hundred to tens of thousands of Bq m −3 have been observed in several caves around the world [2][3][4][5][6][7][8]. In 2017, the International Commission on Radiological Protection (ICRP) issued Publication 137, Occupational Intakes of Radionuclides: Part 3 in which the commission recommends a dose conversion factor for radon progeny of 6 mSv per mJ h m −3 for indoor workplace workers who are engaged in substantial physical activities, and for workers in tourist caves [9,10].…”

Section: Introductionmentioning

confidence: 99%

A Preliminary Study of Radon Equilibrium Factor at a Tourist Cave in Okinawa, Japan

et al. 2021

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The International Commission on Radiological Protection (ICRP) issued its Publication 137, Occupational Intakes of Radionuclides: Part 3 in which the radon equilibrium factor is fixed as 0.4 for tourist caves; however, several studies have reported a different value for the factor and its seasonal variation has also been observed. In this study, the radon concentration, equilibrium equivalent radon concentration and meteorological data were measured, and the equilibrium factor was evaluated in a tourist cave, Gyokusen-do Cave located in the southern part of Okinawa Island in southwestern Japan. Radon concentrations were measured with an AlphaGUARD and their corresponding meteorological data were measured with integrated sensors. Equilibrium equivalent radon concentration was measured with a continuous air monitor. The measured radon concentrations tended to be low in winter and high in summer, which is similar to previously obtained results. By contrast, the equilibrium factor tended to be high in winter (0.55 ± 0.09) and low in summer (0.24 ± 0.15), with a particularly large fluctuation in summer. It was concluded that measurements in different seasons are necessary for proper evaluation of radon equilibrium factor.

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Radon level and radon effective dose rate determination using SSNTDs In Sannur cave, Eastern desert of Egypt

Cited by 15 publications

References 10 publications

Geologic Influence on Radon Concentrations Levels in Cave: A Case Study of Mimpi Cave in the Maros Karst of South Sulawesi, Indonesia

Geologic Influence on Radon Concentrations Levels in Cave: A Case Study of Mimpi Cave in the Maros Karst of South Sulawesi, Indonesia

Measurement of the radon exhalation rate and effective radium concentration in soil samples of southern Sakarya, Turkey

A Preliminary Study of Radon Equilibrium Factor at a Tourist Cave in Okinawa, Japan

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