| 논문명 |
실내의 라돈 방출과 환기에 의한 저감방안 / Indoor Radon Emission and Reduction Measures by Ventilation / 포스터 세션 |
| 수록사항 |
한국태양에너지학회 추계학술발표회 논문집 (2014-11) |
| 주제어 |
라돈방출량 ; 석고보드 ; 라돈가스 ; 환기 ; amount of radon emission ; Gypsum board ; Radon gas ; Ventillation |
| 요약2 |
Radon, one of the pollution sources of indoor air, is colorless, odorless, and tasteless noble gas, and is easily inhaled by humans, causing them lung cancer. The purpose of this study is to examine an amount of radon emission from gypsum boards among indoor building materials, and analyze indoor radon concentration through ventilation, which is another control method. Although it is known that 80-90% of radon flows into indoors through soil, it was also identified at high-rise apartment floors. This is judged to be resulted by building materials, and among them, gypsum board is being pointed out as the main cause. The standard of radon concentration is 148Bq/㎥ in America and Korea and 200Bq/㎥ in Canada, and Sweden is applying stricter standard to new houses (200Bq/㎥) than existing houses (400Bq/㎥). There are five gypsum board plants in Korea, Daejuk, Yeochoen, Daesan, Yeosu, and Ulsan, and gypsum boards that had been produced by each plant since 2014 were collected and then an amount of radon emission of one week was examined. As a result, max. 20Bq/㎥ was recorded, which is lower than the average indoor radon concentration, 48Bq/㎥. In addition, because an amount of radon emission from gypsum board produced in 2010 was confirmed to be 215Bq/㎥, it seems that phospho-gypsum board was converted to desulfurized gypsum board only lately, being applied by QC (Quality Control). Thus, it is needed to find out ways to control radon, ventilation or remodeling, for existing buildings, although gypsum boards of recently constructed buildings could be free from radon. For a basic way to control indoor radon spreading, ventilation should be done. For the experiment, gypsum board that produces a large amount of radon was put in a self-produced acrylic vessel, and ventilation was applied by blowing wind to it using a DC fan, and the change of an amount of radon contained in the vessel was observed. When the amount of radon 168Bq/㎥ was constantly applied by ventilation (once, wind speed 0.12m/s), it was reduced down to 16Bq/㎥ 4 days later, and when the amount of radon 303Bq/㎥ was constantly applied by ventilation (three times, wind speed 0.36m/s), it was reduced down to 30Bq/㎥ 4 days later. It is judged to be a satisfactory level because it is between 15Bq/㎥, outdoor average radon concentration, and 48Bq/㎥, indoor average radon concentration. |
