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Indoor radon, thoron, and thoron daugter concentrations in Korea

Indoor radon, thoron, and thoron daugter concentrations in Korea
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Characteristics of thoron and thoron progeny in Canadian homes

Radiation and Environmental Biophysics, 2010
Naturally occurring isotopes of radon in indoor air are identified as the second leading cause of lung cancer after tobacco smoking. Radon-222 (radon gas) and radon-220 (thoron gas) are the most common isotopes of radon. While the radon equilibrium factor is well established, the equilibrium factor between thoron progeny and thoron gas is still not ...
Jing Chen, Atsuyuki Sorimachi, Shinji Tokonami   +2 more
exaly   +3 more sources

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
C K Kim, Shinji Tokonami
exaly   +2 more sources

Characteristic of thoron ( 220 Rn) in environment

Applied Radiation and Isotopes, 2017
This paper describes importance of 220Rn (hereafter thoron) progeny measurement for the dose estimation. Although the spatial distribution of thoron activity concentration strongly depends on the distance from wall surface as an indoor thoron source), a homogeneous distribution was expected to be observed for 212Pb activity concentration which was one ...
Masahiro Hosoda, Hiromi Kudo, Kazuki Iwaoka   +2 more
exaly   +3 more sources

Thoron exposure in the radon-thoron prone area of the Adamawa Region, Cameroon

Applied Radiation and Isotopes
The radon-prone area of the Adamawa region is characterized by high radon concentrations, where no low-risk area was observed. This study aims to investigate about indoor thoron concentration in this area, using RADUET detectors, thoron progeny monitors and DTPS/DRPS. The indoor thoron concentration ranged between 17 and 1000 Bq m-3, with an average of
Rosaline Mishra, Chutima Kranrod, Masahiro Hosoda   +2 more
exaly   +3 more sources

A method for the determination of thoron and thoron progeny concentration at workplaces and thoron concentration in calibration chambers

Radiation Protection Dosimetry, 2008
A new method to determine the air concentration of (220)Rn, commonly referred to as thoron, has been developed. The method is insensitive to the presence of any concentration of (222)Rn. Air turbulence, humidity and temperature do not influence the measurement.
R, Falk, G, Akerblom, Leif, Nyblom
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Thoron and thoron progeny measurements in German clay houses

Radiation Protection Dosimetry, 2014
In recent years, elevated thoron concentrations were found in houses built of unfired clay. In this study experiments were carried out in 17 traditional and modern clay houses in Germany to obtain an overview of indoor thoron in such houses. Long-term measurements over an 8-week period were performed using a newly developed Unattended Battery-Operated ...
S, Gierl, O, Meisenberg, P, Feistenauer, J, Tschiersch   +3 more
openaire   +2 more sources

Evaluation of Radiation Hazards Created by Thoron and Thoron Daughters

American Industrial Hygiene Association Journal, 1960
In estimating the relative hazards created by the inhalation of thoron and thoron daughters, certain assumptions were required because of the incomplete knowledge of the biological behavior of these elements or were employed to simplify the calculations.
R L, BLANCHARD, D A, HOLADAY
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CFD modelling of thoron and thoron progeny in the indoor environment

Radiation Protection Dosimetry, 2011
Thoron (220Rn) exhalation from building materials has become increasingly recognised as a potential source for radiation exposure in residences. However, contrary to radon (222Rn), limited information on thoron exposure is available. The purpose of this study is to estimate the concentration of thoron and its progeny products in a typical Dutch living ...
G, de With, P, de Jong
openaire   +2 more sources