scholarly journals Determination of radon exhalation rates from soil around buildings in Lagos environments using passive measurement technique

2020 ◽  
Vol 18 (1) ◽  
pp. 129-135
Author(s):  
Oluwasayo Peter Abodunrin ◽  
Margaret Kofoworola Akinloye
Keyword(s):  
Measurement Technique ◽  
Radon Exhalation ◽  
Passive Measurement ◽  
Radon Exhalation Rates

The Determination of Radon Exhalation Rates

1983 ◽  
Vol 45 (2) ◽  
pp. 369-376 ◽  
Author(s):  
Niels Jonassen
Keyword(s):  
Radon Exhalation ◽  
Radon Exhalation Rates

Determination of radon exhalation rates from tiles using active and passive techniques

2001 ◽  
Vol 34 (1-6) ◽  
pp. 491-495 ◽  
Author(s):  
M.I Al-Jarallah ◽  
F Abu-Jarad ◽  
Fazal-ur-Rehman
Keyword(s):  
Radon Exhalation ◽  
Radon Exhalation Rates ◽  
Passive Techniques

scholarly journals Radon exhalation rates of some granites used in Serbia

2015 ◽  
Vol 30 (2) ◽  
pp. 145-148
Author(s):  
Mladen Nikolic ◽  
Rodoljub Simovic
Keyword(s):  
Measurement Technique ◽  
Back Diffusion ◽  
Radon Exhalation Rate ◽  
Exhalation Rate ◽  
Closed Chamber ◽  
Radon Measurement ◽  
Radon Exhalation ◽  
Radium Content ◽  
Radon Exhalation Rates ◽  
Closed Chamber Method

In order to address concern about radon exhalation in building material, radon exhalation rate was determined for different granites available on Serbian market. Radon exhalation rate, along with mass exhalation rate and effective radium content were determined by closed chamber method and active continuous radon measurement technique. For this research, special chambers were made and tested for back diffusion and leakage, and the radon concentrations measured were included in the calculation of radon exhalation. The radon exhalation rate ranged from 0.161 Bq/m2h to 0.576 Bq/m2h, the mass exhalation rate from 0.167 Bq/kgh to 0.678 Bq/kgh, while the effective radium content was found to be from 12.37 Bq/kg to 50.23 Bq/kg. The results indicate that the granites used in Serbia have a low level of radon exhalation.

Influence of the accumulation chamber insertion depth to measure surface radon exhalation rates

2021 ◽  
Author(s):  
Isidoro Gutiérrez Álvarez ◽  
José Luis Guerrero ◽  
José Enrique Martín ◽  
José Antonio Adame ◽  
Juan Pedro Bolívar
Keyword(s):  
Field Experiments ◽  
Lateral Diffusion ◽  
External Effects ◽  
Insertion Depth ◽  
Radon Exhalation ◽  
Accumulation Chamber ◽  
Diffusion Effects ◽  
Radon Exhalation Rates ◽  
The City ◽  
Effective Decay

<p>A common method to measure radon exhalation rates relies on the accumulation chamber technique. Usually, this approach only considers one-dimensional gas transport within the soil that neglects lateral diffusion. However, this lateral transport could reduce the reliability of the method. In this work, several cylindrical- shaped accumulation chambers were built with different heights to test if the insertion depth of the chamber into the soil improves the reliability of the method and, in that case, if it could limit the radon lateral diffusion effects. To check this hypothesis in laboratory, two reference exhalation boxes were manufactured using phospho- gypsum from a repository located nearby the city of Huelva, in the southwest of Spain. Laboratory experiments showed that insertion depth had a deep impact in reducing the effective decay constant of the system, extending the interval where the linear fitting can be applied, and consistently obtaining reliable exhalation measurements once a minimum insertion depth is employed. Field experiments carried out in the phosphogypsum repository showed that increasing the insertion depth could reduce the influence of external effects, increasing the re- peatability of the method. These experiments provided a method to obtain consistent radon exhalation mea- surements over the phosphogypsum repository.</p>

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