초록 열기/닫기 버튼

Radon gas is one of the natural radioactive substances that appear in nature and known to cause lung cancer. Granite is widely distributed in Korea and a relatively high radon content has been detected through groundwater inspection. Previous studies have found that the radon content in the wind-hole area were higher than the safety level suggested as international safety standards. In this study, radon content of granite in Mt. Geumjeongsan and coastal areas comparatively investigated with the Mt. Jangsan area in Busan, where underground cold springs and rhyolite block streams are distributed. Radon contents in Mt. Jangsan are over 1,000Bq/m3, while those of Mt. Geumjeongsan and Seaside are lower than 200Bq/m3. Sedimentary rocks with high carbonate content showed low radon content. In particular, the radon content measured in two places in Jeongseon-gun, where ice is formed even in mid-summer was very low, confirming that the area with sedimentary rock high in carbonate content exhibited low radioactivity level.