Study on a new charcoal closed chamber method for measuring radon exhalation rate of building materials

2020 ◽  
Vol 134 ◽  
pp. 106308
Author(s):  
Song Yanchao ◽  
Wang Junlin ◽  
Shang Bing ◽  
Cui Hongxing ◽  
Wu Yunyun
Keyword(s):  
Building Materials ◽  
Radon Exhalation Rate ◽  
Exhalation Rate ◽  
Closed Chamber ◽  
Radon Exhalation ◽  
Chamber Method ◽  
Closed Chamber Method

Accurate measurement of the radon exhalation rate of building materials using the closed chamber method

2012 ◽  
Vol 32 (3) ◽  
pp. 315-323 ◽  
Author(s):  
Lei Zhang ◽  
Xing Lei ◽  
Qiuju Guo ◽  
Shanqiang Wang ◽  
Xinhua Ma ◽  
...  
Keyword(s):  
Building Materials ◽  
Radon Exhalation Rate ◽  
Exhalation Rate ◽  
Closed Chamber ◽  
Radon Exhalation ◽  
Chamber Method ◽  
Closed Chamber Method

Experimental Study of Radon Exhalation Rate in Uranium-Like Rock Based on Closed Chamber Method

2018 ◽  
Author(s):  
Fuliang Jiang ◽  
Xiaoli Wang ◽  
Shuai Zhang ◽  
Xiangyang Li ◽  
Changshou Hong
Keyword(s):  
Diffusion Length ◽  
Underground Mining ◽  
Similarity Theory ◽  
Radon Exhalation Rate ◽  
Exhalation Rate ◽  
Closed Chamber ◽  
Radon Exhalation ◽  
Chamber Method ◽  
Diffusion Phenomena ◽  
Closed Chamber Method

The closed chamber method is widely used in measuring radon exhalation rate, which can avoid the error caused by the leakage and anti-diffusion phenomena. Firstly, considering the actual situation that uranium ore is difficult to obtain and have a high radioactivity, the uranium-like rock was made according to the similarity theory. Secondly, the diffusion length and intrinsic radon exhalation rate were obtained by using the closed chamber method. Thirdly, the theoretical values of radon exhalation rate made by uranium-like ore block were calculated, compared with the measured values. This study shows that the uranium-like rock block made by the best mass ratio is helpful for the subsequent experiment, and the error between the theoretical calculation and the measured value is no more than 9.14%. This indicates it is reliable to estimate radon exhalation rate by diffusion length and intrinsic radon exhalation rate and can also provide a foundation for rapidly gaining radon exhalation rate of the same type material by the closed chamber method. This study can further promote the study of the radon exhalation rate under the complex physical conditions and then better guide the protection work of radon radiation in underground mining.

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.

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