Study of Radon Propagation in A Dwelling Using the CFD Modelling Capabilities of CONTAM
Keywords:Radon, Cfd, Computational Fluid Dynamics, Modelling, Indoor Air Quality
Naturally occurring radon gas is the leading cause of lung cancer for nonsmokers. Limiting the amount of radon inhaled by residents when designing homes and HVAC system is of utmost importance. This report focuses on dedicated 3D CFD simulations of indoor radon distribution in a dwelling located in Madrid, Spain, using the CONTAM and CFD-0 software developed by NIST. CFD can be used and has many advantages for indoor air flow analysis with reduced mathematical limitations. The results are qualitative and show the possibility to calculate detailed volumetric radon concentrations inside a ventilated dwelling. This technique allows a better estimate of the radon infiltration rate to mitigate the accumulation of radon inside dwellings.
N. Segovia and J. Cejudo, "Radon measurements in the interior of household dwellings," Nuclear Tracks and Radiation Measurements (1982), vol. 8, p. 407–410, 1984. https://doi.org/10.1016/0735-245x(84)90131-5
V. Sundal, H. Henriksen, O. Soldal and T. Strand, "The influence of geological factors on indoor radon concentrations in Norway," Science of the Total Environment, vol. 328, p. 41–53, 2004. https://doi.org/10.1016/j.scitotenv.2004.02.011
UNSCEAR, "Exposures of Workers and the Public from Various Sources of Radiation. Report A/AC.82/-644," in United Nations Scientific Committee on the Effects of Atomic Radiation, New York, 2000. https://doi.org/10.18356/46eef4a3-en
Spanish Nuclear Safety Council (CSN), "Mapa del potencial de radón en España," 2020. [Online]. Available: https://www.csn.es/en/mapa-del-potencial-de-radon-en-espana. [Accessed 19 March 2020].
L. S. Quindós, J. Soto, P. L. Fernandez, C. Rodenas, J. Gomez, J. Arteche, G. Romero and J. Madrid, "Radon and lung cancer in Spain," Radiation Protection Dosimetry, vol. 36, p. 331–333, 1991. https://doi.org/10.1016/0169-5002(92)90221-5
Boletín Oficial del Estado, Real Decreto 314/2006, de 17 de marzo, por el que se aprueba el Código Técnico de la Edificación, 2019. [Online]. Available: https://www.boe.es/buscar/act.php?id=BOE-A-2006-5515. [Accessed 19 March 2020].
J. Garcı́a-Tobar, "A comparative study of indoor radon levels between two similar dwellings using CONTAM software," Environments, vol. 5, p. 59, 2018. https://doi.org/10.3390/environments5050059
W. S. Dols and B. J. Polidoro, "Contam user guide and program documentation version 3.2," 2015. https://doi.org/10.6028/nist.tn.1887
Directive, 59/Euratom of 5 December 2013 laying down basic safety standards for protection against the dangers arising from exposure to ionising radiation, and repealing Directives 89/618/Euratom, 90/641/Euratom, 96/29/Euratom, 97/43/Euratom and 2003/122/Euratom, Euratom, 2013.
J. Garcı́a-Tobar, "Weather-dependent modelling of the indoor radon concentration in two dwellings using CONTAM," Indoor and Built Environment, vol. 28, p. 1341–1349, 2019. https://doi.org/10.1177/1420326x19841119
N. Chauhan, R. P. Chauhan, M. Joshi, T. K. Agarwal, P. Aggarwal and B. K. Sahoo, "Study of indoor radon distribution using measurements and CFD modeling," Journal of environmental radioactivity, vol. 136, p. 105–111, 2014. https://doi.org/10.1016/j.jenvrad.2014.05.020
L. Wang and Q. Chen, "Validation of a coupled multizone-CFD program for building airflow and contaminant transport simulations," HVAC&R Research, vol. 13, p. 267–281, 2007. https://doi.org/10.1080/10789669.2007.10390954
L. Wang and Q. Chen, "Theoretical and numerical studies of coupling multizone and CFD models for building air distribution simulations," Indoor Air, vol. 17, p. 348–361, 2007. https://doi.org/10.1111/j.1600-0668.2007.00481.x
J. Srebric, Q. Chen and L. R. Glicksman, "Validation of a zero-equation turbulence model for complex indoor airflow simulation," ASHRAE Transactions, vol. 105, p. 414, 1999.
N. Chauhan and R. P. Chauhan, "Active-passive measurements and CFD based modelling for indoor radon dispersion study," Journal of environmental radioactivity, vol. 144, p. 57–61, 2015. https://doi.org/10.1016/j.jenvrad.2015.03.009
F. Li, E. S. Lee, J. Liu and Y. Zhu, "Predicting self-pollution inside school buses using a CFD and multi-zone coupled model," Atmospheric Environment, vol. 107, p. 16–23, 2015. https://doi.org/10.1016/j.atmosenv.2015.02.024
B. P. P. Barbosa and N. d. C. L. Brum, "Validation and assessment of the CFD-0 module of CONTAM software for airborne contaminant transport simulation in laboratory and hospital applications," Building and Environment, vol. 142, p. 139–152, 2018. https://doi.org/10.1016/j.buildenv.2018.06.013
R. Rabi and L. Oufni, "Study of radon dispersion in typical dwelling using CFD modeling combined with passive-active measurements," Radiation Physics and Chemistry, vol. 139, p. 40–48, 2017. https://doi.org/10.1016/j.radphyschem.2017.04.012
Tecplot 360, "Data Validation and CFD post-processing software," Tecplot USA, [Online]. Available: https://www.tecplot.com/. [Accessed 19 March 2020].
L. L. Wang, W. S. Dols and Q. Chen, "Using CFD capabilities of CONTAM 3.0 for simulating airflow and contaminant transport in and around buildings," Hvac&R Research, vol. 16, p. 749–763, 2010. https://doi.org/10.1080/10789669.2010.10390932
W. J. Riley, A. L. Robinson, A. J. Gadgil and W. W. Nazaroff, "Effects of variable wind speed and direction on radon transport from soil into buildings: model development and exploratory results," Atmospheric Environment, vol. 33, p. 2157–2168, 1999. https://doi.org/10.1016/s1352-2310(98)00374-4
G. Roserens, H. U. Johner, G. Piller, P. Imbaumgarten, A. Binz, F. Fregnan and G. Lehmann, "Swiss Radon Handbook," Swiss Federal Office of Public Health, Bern, 2000.
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