Simultaneous determination of the radon diffusion coefficient and the free radon production rate from compact porous emanation media
| Autor: | Chun-huang Huang, Sheng-yang Feng, Wen-hao Wu, Shi Li, Yong-jun Ye |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Materials science Geography Planning and Development chemistry.chemical_element Radon Radon exhalation Building and Construction Mechanics 010501 environmental sciences Uranium 01 natural sciences Measure (mathematics) 030218 nuclear medicine & medical imaging 03 medical and health sciences Radon diffusion 0302 clinical medicine chemistry Diffusion (business) Porosity 0105 earth and related environmental sciences Civil and Structural Engineering Production rate |
| Zdroj: | Building and Environment. 144:66-71 |
| ISSN: | 0360-1323 |
| DOI: | 10.1016/j.buildenv.2018.08.015 |
| Popis: | The radon diffusion coefficient and the free radon production rate are important parameters for used to describe the migration of radon in porous emanation media. However, the method currently used to determine these two parameters is complicated. Based on a theory of the radon exhalation by diffusion from the inner and outer surfaces of a circular tube, a method to determine these two parameters in compact porous emanation media was proposed, and an experimental measuring device was designed and manufactured. The experimental device was used to simultaneously measure the radon exhalation rate from the inner and outer surfaces of a quarter-circular tubular concrete block filled with fine-grained uranium tailing sand. The measurements were used to calculate the radon diffusion coefficient and the free radon production rate. The result obtained by using this method shows that accuracy was within the accepted range of experimental error. This method has practical value for the simultaneous determination of the radon diffusion coefficient and the free radon production rate from compact porous emanation media. |
| Databáze: | OpenAIRE |
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