Application of numerical modelling for the better design of radon preventive and remedial measures

• Autorzy: Jiránek M.
• Konferencja: Proceedings of the International Conference "Radon in Environment" 10-14 May 2009, Zakopane Poland
• Języki publikacji: EN

Abstrakty

EN

The main aim of the presented work was to verify, whether soil gas radon concentrations measured directly on building sites at a depth of 0.8 m below ground level and used in several countries for the design of protective measures against radon from the soil are in agreement with concentrations measured under houses after they had been built on a corresponding site. The correlation between sub-slab concentrations and concentrations measured at a depth of 0.8 m below the uncovered soil surface has been studied using a numerical simulation with the help of the computer program Radon2D. Numerical predictions showed that radon concentrations under the houses could be significantly different from concentrations measured on the building site and used for the assessment of radon risk categories. The highest differences were predicted for soil profiles with highly permeable upper layers. In the case of houses resting on the ground level the sub-slab radon concentration can be up to 3.4 times higher compared to the concentration measured at a depth of 0.8 m. An even higher increase was predicted for houses with the floor embedded 2 m below ground level. In this case the sub-floor concentrations increased up to 9.3 times. Numerical modelling can thus be considered as a powerful tool that can ensure the higher reliability of radon preventive and remedial measures.

Słowa kluczowe

EN

radon; numerical modelling; radon concentration; radon prevention; radon remediation

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2010
• Tom: Vol. 55, No. 4
• Strony: 451--457
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Jiránek M.

• Faculty of Civil Engineering, Czech Technical University, 7 Thákurova Str., 166 29 Praha 6, Czech Republic, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Andersen CE, Albarracin D, Csige I et al. (1999) ERRICCA radon model intercomparison exercise. Risø-R-1120(EN). Risø National Laboratory, Roskilde, Denmark
• 2. Jiránek M, Svoboda Z (1997) Verification of radon protective measures by means of a computer model. In: Proc of the IBPSA Building Simulation’97 Conf, 8–10 September 1997, Praque, Czech Republic
• 3. Jiránek M, Svoboda Z (2007) Numerical modelling as a tool for optimisation of sub-slab depressurisation systems design. Building and Environment 42:1994–2003
• 4. Neznal M, Neznal M, Jiránek M (2000) Comparison of calculated and measured soil-gas radon concentration and radon exhalation rate. In: Radon investigations in the Czech Republic VIII. Czech Geological Survey, Prague, pp 16–26
• 5. Neznal M, Neznal M, Matolín M, Barnet I, Mikšová J (2004) The new method for assessing the radon risk of building sites. Czech Geological Survey, Prague. Special Papers no. 16
• 6. Rogers VC, Nielson KK (1991) Correlations for predicting air permeabilities and 222Rn diffusion coefficients of soils. Health Phys 61;2:225–230
• 7.Svoboda Z (2000) The convective-diffusion equation and its use in building physics. Int J Architectural Sci 1;2:68–79