Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (06): 60501-060501.

• NUCLEAR PHYSICS AND INTERDISCIPLINARY RESEARCH •

### Evaluation method of radon preventing effect in underground construction

LUO Shaodong DENG Yuequan DONG Faqin QU Ruixue XIE Zhonglei

1. (School of Materials, Southwest University of Science and Technology of Sichuan Province, Mianyang 621010, China)
• Received:2013-12-23 Revised:2014-03-24 Online:2014-06-10 Published:2014-06-04

Abstract: Background: It’s difficult to evaluate the radon prevention effect because of the short operating time of measuring instrument under the circumstances of high humidity in underground construction. Purpose: A new rapid method to evaluate the radon prevention efficiency of underground construction was introduced. Methods: The radon concentrations before and after shielding operation were determined, and according to the regularity of radon decay, the shielding rate can be calculated. Results: The results showed that radon shielding rate in underground construction remains generally stable with variation of time, and the actual relatively standard deviation was 3.95%. So the rapid determination and evaluation of radon preventing effect under special conditions in underground construction can be realized by taking shielding rate in a short time for the final shielding rate. Compared with those by the local static method in ground lab, the results were similar. Conclusion: This paper provided a prompt, accurate and practicable way for the evaluation of radon prevention in underground construction, having a certain reference value.