Results 191 to 200 of about 10,473 (258)

Indoor radon, thoron, and thoron daughter concentrations in Korea

International Congress Series, 2005
A nationwide survey for radon (222Rn), thoron (220Rn), and thoron daughters has been conducted. The arithmetic mean of annual radon concentration in Korean dwellings was 53.4±57.5 Bq/m3. The indoor radon concentration showed a lognormal distribution with a geometric mean and its standard deviation of 43.3±1.8 Bq/m3. The arithmetic mean of annual thoron
Y.J. Kim, H.Y. Lee, C.S. Kim, B.U. Chang, B.H. Rho, C.K. Kim, S. Tokonami   +6 more
openaire   +1 more source

A case study on seasonal and annual average indoor radon, thoron, and their progeny level in Kohima district, Nagaland, India

Isotopes in environmental and health studies, 2022
Indoor radon and thoron survey has been carried out in 50 dwellings under Kohima district, Nagaland, India, using the latest measurement technology. The survey has been carried out for a one-year period in 3 different seasons, and the dwellings were ...
Supongtoshi Jamir, B. Sahoo, R. Mishra, D. Sinha   +3 more
semanticscholar   +1 more source

Application of CFD modeling for indoor radon and thoron dispersion study: A review.

Journal of Environmental Radioactivity
This paper provides an in-depth discussion of the CFD implications to the design/study of interior environments and an overview of the most widely used CFD model for indoor radon and thoron dispersion study.
Rajat Parkash, Neetika Chauhan, R. Chauhan   +2 more
semanticscholar   +1 more source

A Comprehensive Study on Indoor Radon, Thoron and Their Progeny Level in Dimapur District of Nagaland, India.

Radiation Protection Dosimetry, 2022
Indoor radon (222Rn), thoron (220Rn) and their progeny concentrations were detected in several homes in Dimapur district, Nagaland, utilizing Direct Radon and Thoron progeny sensors based on solid-state Nuclear Track Detectors (Type-2 film) and pinhole ...
Supongtoshi Jamir, B. Sahoo, R. Mishra, D. Sinha   +3 more
semanticscholar   +1 more source

Pilot Study of Thoron Concentration in an Underground Thorium Mine

Health Physics, 2022
The Steenkampskraal mine in the Western Cape Province in South Africa provides some interesting challenges for radiation protection practitioners in view of the high thoron values encountered in this mine.
R. Lindsay, S. Mngonyama, P. Molahlehi, X. E. Ngwadla, G. J. Ramonnye   +4 more
semanticscholar   +1 more source

Improved data analysis techniques for calculating more accurate radon and thoron exhalation rates from building interior solid walls.

Applied Radiation and Isotopes
The impacts of mathematical models and associated parameters on radon (222Rn) and thoron (220Rn) exhalation rates based on in-situ testing at building interior solid walls were demonstrated to improve data analysis techniques. The results showed that the
Akihiro Sakoda, Yuu shimori, Qianhao Jin, Takeshi Iimoto   +3 more
semanticscholar   +1 more source

Investigation of radon and thoron exhalation rates in soils: Manali-Leh Highway region of Himalayas.

Journal of Environmental Radioactivity
This study analyses the natural radionuclides concentration (226Ra and 232Th) along with the radon and thoron exhalation rates in 50 soil samples collected from the Manali-Leh Highway region of the Himalayas.
Jyoti Yadav, Rajat Parkash, Bhupesh Khyalia, R. P. Chauhan, Pushpendra P. Singh, Paramjeet Singh, Ranjeet Dalal   +6 more
semanticscholar   +1 more source

Preparation and characterisation of ceramic-based thoron sources for thoron calibration chamber

Radiation Protection Dosimetry, 2015
The aim of this study is to explore the correlations between the properties of the source's material and the thoron flux produced. This means a complex procedure that involves morphological characterisation (the determination of specific surface area and pore size distribution) and thoron emanation and exhalation measurements as well. In this work, the
A, Csordás, F, Fábián, M, Horváth, M, Hegedűs, J, Somlai, T, Kovács   +5 more
openaire   +2 more sources

Development of a thoron chamber for calibration of thoron monitors under natural wind speed conditions

Measurement science and technology, 2022
To examine the response of diffusion-type detectors for thoron under wind speeds similar to natural air ventilation, a special design thoron chamber was developed with a dynamic circulating air-flow field forced by fans.
Lidan Lv, Zhengzhong He, D. Xiao, S. Qiu
semanticscholar   +1 more source

Thoron measurements in Hungary

Radiation Protection Dosimetry, 2010
In this study, several Hungarian dwellings and working places were surveyed using passive radon- and thoron-measuring devices (Radopot(®) and Raduet(®)) from 2003 to 2008. The detectors were placed 15-30 cm from the wall throughout the 1- to 3-month period. In dwellings, the presence of thoron, ∼100 Bq m(-3), was detected almost in all cases, ; however,
openaire   +2 more sources