Measurement of Radon-222 Exhalation Rate from Building Materials by Using CR-39 Radon Cup

CR-39 라돈컵을 이용한 국산 전축자재의 라돈-222 방출율 측정

  • 장시영 (한국원자력연구소 방사선방어연구실) ;
  • 하정우 (한국원자력연구소 방사선방어연구실) ;
  • 이병헌 (한양대학교 원자력공학과)
  • Published : 1991.06.30

Abstract

Radon-222 exhalation rate from several domestic building materials were experimentally measured by using radon cup method, in which a CR-39 plastic is used as a passive radon detector. The radon detection factor of CR-39 detector determined in a series of calibration experiments was $0.164{\pm}0.005(tracks\;cm^{-2}/Bq\;d\;m^{-3})$, which is consistent with those reported by other investigators. The radon exhalation rates of several building materials (brick, red brick, concrete block, granite plate, concrete floor and wall) ranges from $6.8{\times}10^{-6}\;(granite plate)\;to\;75.0{\times}10^{-6}Bq/m^2-sec(brick)$ with the increasing order of granite plate, red brick, concrete wall, concrete block, concrete floor and brick. It showed that the CR39 radon cup can be efficiently utilized in measuring the radon-222 gas exhalation rate from building materials.