This study was performed to determine the effects of soil and building materials on indoor radon concentration. Short-term measurements were made in the underground soil of a building along with the radon emanation rates from the phosphogypsum board used as the interior wall. The radon measurements in the soil were 9,213 Bq/m3 in the B3 level, and 3,765 Bq/m3 in the B4 level. Soil radon concentration in the B4 level was 2.4 times higher than in the B3 level. Indoor radon measurements in 50 different locations in the underground of the building, averaged from 144.3 Bq/m3 (B1), 177.0 Bq/m3 (B2), and 189.2 Bq/m3 (B3) to a high of 210.1 Bq/m3 (B4). Indoor radon concentration was increased from the lower level to the upper level. The radon emanation rates from phosphogypsum were 4,234.1 mBq/m2/h and, 450.4 mBq/kg/h. The measurement results indicated that the phosphogypsum board used as building materials as well as the soil could affect the indoor radon concentration.

Abstract
1. 서 론
2. 실험방법
    2.1 실험대상
    2.2 측정방법 및 측정기간
3. 결과 및 고찰
    3.1 토양 라돈 측정
    3.2 실내 라돈 장기측정
    3.3 실내라돈 연속측정
    3.4 건축자재 인산석고량 측정
4. 결 론
References

• 김대준(호서대학교 벤처대학원 융합과학기술학과) | Dae-Joon Kim (Department of Convergence Science Technology, Graduate School of Venture, Hoseo University)
• 이장훈(호서대학교 벤처대학원 융합과학기술학과) | Jang-Hoon Lee (Department of Convergence Science Technology, Graduate School of Venture, Hoseo University) Corresponding author