Radon (222Rn) gas is a main source of ionizing radiation of natural origin. It typically moves up through the ground to the air above and into building or home through cracks and other holes in the foundation. Significantly, the Surgeon General has warned that radon is the second leading cause of lung cancer in the United States today. This survey covers the determination of indoor radon concentrations at home from 2013 to 2014 in some areas of Gangwondo, every three months (seasonal) during one year using an alpha-track detector. The results showed that the annual average concentration of indoor radon was 84.5 Bq/m3 (GM: 64.5 Bq/m3) at homes. Indoor radon level was the highest in winter and the lowest in summer. Geometric mean radon concentration in winter was 1.03~2.58 times higher than other seasons. The data obtained from this study provide a basis for the preparation of legal regulation and public health protection manuals in this area.

1. 서 론
 2. 연구방법
  2.1 연구대상
  2.2 조사 및 분석방법
  2.3 통계적 분석 방법
 3. 연구결과 및 고찰
  3.1 계절별 실내 라돈 농도
  3.2 읍면별 실내 라돈 농도 비교
  3.3 농도구간별 실내 라돈 농도 비교
  3.4 실내 및 실외 라돈 농도의 비교
 4. 결 론
 References

• 유주희(국립환경과학원 환경기반연구부 생활환경연구과) | Ju-Hee Yoo
• 서수연(환경부 금강유역환경청) | Soo-Yun Seo
• 정준식(국립환경과학원 환경기반연구부 생활환경연구과) | Joon-Sig Jung
• 이규선(국립환경과학원 환경기반연구부 생활환경연구과) | Kyu-Sun Lee
• 이재원(국립환경과학원 환경기반연구부 생활환경연구과) | Jae-Won Lee
• 권명희(국립환경과학원 환경기반연구부 생활환경연구과) | Myung-Hee Kwon Corresponding author