Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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Measurement using the Charcoal Canister of the Indoor Radon Concentration in Classroom and Laboratory

차콜 캐니스터를 이용한 교실 및 실험실의 라돈 농도 측정

  • Dae Cheol Kweon (Department of Radiological Science, College of Health, Shinhan University)
  • 권대철 (신한대학교 보건대학 방사선학과)
  • Received : 2024.10.03
  • Accepted : 2024.11.30
  • Published : 2024.11.30
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Abstract

This study aims to measure the level of indoor radon concentration in classrooms where college students take lectures and participate in activities, and use it as basic data for indoor radon management measures in school classrooms. To measure radon concentration, the study was conducted in a classroom at a university located in Gyeonggi-do, depending on the university classroom operating environment. Radon was measured using the RadoMon Kit (Betterlife Co., Ltd., Suwon, Korea). To measure radon concentration, the effective dose model presented in the United Nations Scientific Committee on the Effects of Radiation Effects Report 2000 (UNSCEAR (2000) was used. The effective dose was evaluated by applying a total of 1,200 hours of annual living time indoors in the classroom. The radon concentration in the classroom and laboratory was measured, the annual effective dose was evaluated, and the effective dose was converted by entering the radon concentration and factors using the personal radon dosimetry program provided by WISE. The radon concentration using the charcoal canister was 80.29 Bq/m3 in the classroom, and 90.28 Bq/m3 in the laboratory, indicating a high radon concentration in the laboratory. The annual effective dose and cumulative dose of radon concentration were measured at 1.21 mSv in the classroom and 1.36 mSv in the laboratory, and the dose rate was 1.008 µSv/h in the classroom and 1.134 µSv/h in the laboratory. The indoor radon concentration was measured at a level lower than the indoor radon concentration management standard, but from the viewpoint of optimization of protection, efforts should be made to keep the radon concentration as low as reasonably achievable and reduce the degree of health hazard, and continuous management is necessary.

본 연구는 대학생들이 강의를 수강하고 활동하는 교실에서 실내 라돈 농도의 수준을 측정하여 라돈에 대한 학교 교실의 실내 라돈 관리방안을 위한 기초자료로 활용하고자 한다. 라돈 농도 측정을 위해 대학 교실 운영 환경에 따라서 경기도 소재 일개 대학의 교실을 대상으로 수행되었다. 라돈 측정은 RadoMon Kit (Betterlife Co., Ltd., Suwon, Korea)를 이용하여 측정하였다. 라돈 농도를 측정하기 위해 유엔방사선영향과학 위원회 리포트 2000 (UNSCEAR, 2000)에서 제시한 유효선량 모델을 사용하였다. 연간 교실의 실내에 거주한 시간을 총 1,200시간을 적용하여 유효선량을 평가하였다. 교실 및 실험실의 라돈 농도를 측정하고, 연간 유효선량을 평가 및 유효선량에 대한 변환은 WISE에서 제공하는 개인 라돈 선량측정 프로그램을 이용하여 라돈 농도와 인자를 입력하여 유효선량을 측정하였다. 차콜 캐니스터를 이용한 라돈 농도는 교실에서 80.29 Bq/m3 이었고, 실험실에서는 90.28 Bq/m3 로 실험실에서 라돈 농도가 높게 측정되었다. 라돈 농도의 년간유효선량 및 누적선량은 교실 1.21 mSv, 실험실은 1.36 mSv로 계산되었고, 선량율은 교실에서 1.008 µSv/h, 실험실에서 1.134 µSv/h이었다. 실내 라돈 농도는 실내 라돈 농도 관리 기준보다 낮은 준위로 측정되었으나 방호의 최적화 관점에서 라돈 농도를 합리적으로 달성 가능한 한 낮게 유지하고 보건의 위해 정도를 저감하기 위한 노력을 기울이고 지속적인 관리가 필요하다.

Keywords

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