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| Radon Exhalation Rate Survey In An Uranium Mill Tailing Impoundment |
| TAN Zhi-yu, ZHAO Yue, PAN Kai, YE Kai-xuan, PANG Bo |
| School of Nuclear Science and Technology, University of SouthChina, Hengyang 421001 China |
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Abstract Objective To understand the treatment effect of soil covering Mill Tailing Impoundment by the investigation of surface radon exhalation rate. Methods The Power multi-function fast radon monitor with CR-39 solid track sheet which designed by USC was used to measure the radon exhalation rate at four different regions in Uranium Mill Tailing Impoundment. Results In 54 points the range of radon exhalation rate is(0.0911~3.3951) Bq·m-2·s-1, with an average of 0.4107 Bq·m-2 ·s-1. Radon exhalation rate of some sampling point exceeds to a certain value. Conclusion In the absence of considerating the effect of temperature, pressure, humidity, surface temperature and other factors on the radon exhalation rate, the radon exhalation rate substantially below the limits specified in the national standard. The testing results show treatment effect of soil covering is good. To some sampling point, radon exhalation rate should be monitored from time to time to observe the change trends.
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Received: 15 May 2016
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