In this study, a system was developed that can evaluate the radon gas removal efficiency of air cleaner filters. The system has three acrylic chambers connected in series;: the 1st chamber, the filter chamber and the 2nd chamber. In the 1st chamber, a radon source and an air pump were installed to create an environment with a constant radon concentration. Radon concentration in the two chambers was continuously monitored by ionization chamber detectors(RD-200, FRD1600, FTLab, Korea) and, in the 2nd chamber, the radon concentration increase of air filtrated by each filter was inter-compared. HEPA filters and two honeycomb type filters were evaluated. Results of HEPA filter, GAC 1 and GAC 2 were 1142 Bq, 7016 Bq and 12053 Bq, respectively. HEPA filter showed a significantly lower capacity for radon removal than the GAC filters. Also, the GAC 2 filter showed a more than 70 % better result compared to GAC 1 due to the difference in filter materials. Therefore, this system can be used to evaluate the radon removal ability of air cleaner filters, by filter type and filter material.

• 이재준(연세대학교 환경공학과) | Jae-Jun Lee (Department of Environmental Engineering, Yonsei University, Wonju)
• 김선홍(연세대학교 환경공학과) | Seon-Hong Kim (Department of Environmental Engineering, Yonsei University, Wonju)
• 김민준(연세대학교 자연방사능 환경보건센터) | Min-Jun Kim (Yonsei University, Natural Radioactivity Environmental Health Center)
• 차동욱(연세대학교 환경공학과) | Dong-Wok Cha (Department of Environmental Engineering, Yonsei University, Wonju) Corresponding author
• 조승연(연세대학교 환경공학과) | Seung-Yeon Cho (Department of Environmental Engineering, Yonsei University, Wonju) Corresponding author