Distribution of indoor thoron in dwellings under normal and turbulent flow conditions using CFD simulation technique
Extensive work has been carried out on measurement of radon and thoron levels in indoor environment in last three decades. These studies are important from radiation protection point of view, if one considered the contribution of radon, thoron and their decay products to total inhalation do...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2017-01-01
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| Series: | Nuclear Technology and Radiation Protection |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-3994/2017/1451-39941702180C.pdf |
| Summary: | Extensive work has been carried out on measurement of radon and thoron levels
in indoor environment in last three decades. These studies are important from
radiation protection point of view, if one considered the contribution of
radon, thoron and their decay products to total inhalation dose. Numerous
studies on radon measurement well established the behaviour of its dispersion
in dwellings. But the short lives of thoron cause the difficulty to
understand the distribution of thoron in dwellings. The problem becomes more
complicated when thoron dispersion is studied under different inlet air flow
rate. Different air flow pattern may cause different thoron level at
different point in test dwellings causing uncertainty in the measurements.
This work utilized the CFD simulation technique for study of indoor thoron
dispersion in test dwellings under normal and turbulent flow of air. The
simulation study for thoron distribution in a test room was performed for air
velocities 0.10 ms-1, 0.25 ms-1, 0.50 ms-1, 1.0 ms-1, 1.5 ms-1, and 2.0 ms-1.
The results show that the thoron distribution becomes uniform for the inlet
velocity more than 0.5 ms-1 and appropriate to measure indoor thoron
concentration. While in normal condition the measured thoron level varies
depending upon the location of dosimeter. Thoron diffusion and migration
length are also increased with air flow rate. |
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| ISSN: | 1451-3994 1452-8185 |