• 한국건축시공학회지
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• 제18권1호
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• pp.9-15
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• 2018

지구상에 존재하는 라돈가스는 바위, 토양, 건축자재 등에서 방출되는 1급 발암물질로 유일한 기체상으로 존재하고 있다. 공기에 비해 무겁고 분자량이 커 하부에 가라앉아 있지만 이동성이 크다. 라돈가스는 특성상 실외에서 대기에 확산되지만 밀폐되고 환기가 어려운 실내공간의 농도는 수천 배까지 증가할 수 있다. 이러한 라돈가스의 위해성을 해결하기 위해 안트라사이트를 활용한 경화체의 라돈가스 저감 특성과 더불어 실내 마감재로 사용할 수 있는 기초 성능평가를 진행하였다. 기존 여과재로 사용된 안트라사이트를 사용하여 경화체를 제작하였으며, 기존 실내에서 사용된 건축자재 중 라돈을 방출하는 석고보드를 대체할 수 있는 시험을 진행하였다. 결합재로는 경소 마그네시아를 사용하였고, 경소마그네시아의 경화를 위해 염화마그네슘을 사용하였다. 흡착재로 사용된 안트라사이트의 치환율은 0, 10, 20, 30, 40, 50 (%)로 총 6수준으로 진행하였으며,W/B는 40%로 고정하였다. 시험항목은 휨파괴 하중, 열전도율, 라돈가스 농도를 진행하였으며, 양생조건은 항온항습 양생(습도 $80{\pm}5%$, 온도 $20{\pm}2^{\circ}C$)으로 진행하였다.

• Journal of Radiation Protection and Research
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• 제18권1호
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• pp.37-51
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• 1993

본 연구에서는 환기장치로 제어하는 환경인 라돈 표준실 및 라돈 발생기로부터 이론적으로는 Jacobi모델 이론을 사용하여 라돈 자핵종의 농도를 계산하였으며, 실험적으로는 두 발생 조건으로부터 채취된 시료를 알파스펙트럼 분석법에 의해 측정 분석하여 그 농도를 결정하였다. 이론적인 계산치와 실험적인 측정결과를 비교해 본 결과 매우 잘 일치되는 좋은 결과를 얻게 되었다. 따라서 이러한 연구는 실내 라돈환경에서 라돈 자핵종의 알파방출체에 의한 내부피폭선량을 보다 정확히 평가하고, 라돈 자핵종의 개별 농도를 신속히 결정하는 데 크게 기여할 것이라 사료된다.

• International journal of advanced smart convergence
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• 제4권1호
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• pp.93-98
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• 2015

Recently, Radon has been gotten attention for problems of Nuclear Generating Station and a variety of nuclear. It is naturally arises that is accumulated in the interior through the soil with radioactive materials. People exposed to indoor a Radon increase the high risks of lung cancer. The data are consisted of regional Country, The Location, Average Radon pCi/L, Geo Mean and Geo S.D etc. The research is experimented using E-M algorithm. The research result appears to make a division of soil distance, regional and cluster. It requires in effort to minimize exposure to people who live in areas with high radon levels. A country must apprise to people about Radon risk and needs to work out measures plan.

• 한국대기환경학회지
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• 제27권5호
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• pp.569-579
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• 2011

This study evaluated the indoor air quality of 26 government offices located in Seoul. The pollutant samples were taken from Jan. 13th to Jan. 29th and Feb. 20th to Feb. 23rd, 2010 in the offices. The target indoor pollutants for this study were $PM_{10}$, formaldehyde, carbon monoxide, carbon dioxide, total bacteria counts, total volatile organic compounds, radon, nitrogen dioxide, ozone, and asbestos which were controlled by the indoor air quality law for the multiple-use facilities management. The results of this study showed that some pollutants of the 38.5% offices exceeded the standards of the air quality guideline. The correlation analysis of the same pollutants between indoor and outdoor represented that $NO_2$ (r=0.629, p<0.05) and $O_3$ (r=0.459, p<0.01) were significant, however, $PM_{10}$ and CO were not. The correlation analysis between different pollutants showed that CO and TVOC (total volatile organic compounds: r=0.724; p<0.01), CO and $NO_2$ (r=0.674; p<0.01), HCHO and humidity (r=0.605; p<0.01), $CO_2$ and TVOC (r=0.534; p<0.01), TBC (total bacteria counts) and Asbestos (r=0.520; p<0.01) were significant. The energy-saving system of government buildings in winter caused under-ventilated and poor air quality. This study suggests that the concentrations of radon and $CO_2$ should be used as an indicator for monitoring indoor air quality and maintaining effective ventilations.

• 실내환경 및 냄새 학회지
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• 제17권4호
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• pp.322-329
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• 2018

The objective of this study is to identify the research trend in the field of indoor environment in Korea. We collected 419 papers published in the Journal of the Korean Society for indoor environment between 2004 and 2018, and attempted to produce datasets using a topic modeling technique, Latent Dirichlet Allocation(LDA). The result of topic modeling showed that 8 topics ("VOCs investigation", "Subway environment", "Building thermal environment", "School health", "Building particulate matter", "Asbestos risk", "Radon risk", "Air cleaner and treatment") could be extracted using Gibbs sampling method. In terms of topic trends, investigation of volatile organic compounds, subway environment, school health, and building particulate matter showed a decreasing tendency, while the building thermal environment, asbestos risk, radon risk, air cleaners, and air treatment showed an increasing tendency. The results of this topic modeling could help us to understand current trends related indoor environment, and provide valuable information in developing future research and policy frameworks.

• 한국학교보건학회지
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• 제16권1호
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• pp.81-90
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• 2003

This study was conducted to contribute to the basic data for decisions on environment policy improvement in health promotion for students in elementary, middle and high schools. This study was carried out to investigate the extent of indoor air pollution in elementary, middle and high schools in residential, traffic congestional and industrial areas. The concentrations of major indoor air pollutants(carbon monoxide, carbon dioxide, respiratory particulate, radon) and thermocircumstance (temperature, relative humidity, intensity of illumination) indices were observed from June to August 2000. As results of the survey, the mean values of thermocircumstance in school were $26.94{\pm}1.15^{\circ}C$ of temperature, $68.88{\pm}5.31%$ of humidity and $268.26{\pm}164.60$ Lux of intensity of illumination. The mean concentrations of carbon monoxide, carbon dioxide, respiratory particulate were $8.36{\pm}0.29\;ppm$, $547.66{\pm}175.58\;ppm$, $36.23{\pm}48.39\;{\mu}g/m3$, respectively. These values were lower than those of the indoor environmental standard on the first clause of Article 45 of public utilization service notified public hygiene of the Ministry of Health and Social Affairs. The mean concentration of radon was $20.07{\pm}17.95\;Bq/m3$. Which was below the U.S. EPA radon action level.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2017년도 춘계 학술논문 발표대회
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• pp.113-114
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• 2017

Recently, Subway workers have died from lung cancer. According to the Epidemiological Survey of the Welfare Corporation Institute of Pulmonary Disease of the Welfare Corporation, the family members applied for industrial accidents. The radon concentration in the subway work area was found to exceed 10 times the recommended standard value of 148 becquerels (Bq/㎥) in domestic multipurpose facilities. In addition, as a result of the national indoor radon concentration survey conducted by the Ministry of Environment in 2010 and 2013, housing was found to be over 100 becquerels (Bq/㎥) in 41% of the surveyed subjects. In addition, it was found that in 2012, 16.3% of villages exceeded the radon standard value in the survey on natural radioactive materials containing groundwater.

• 한국건축시공학회지
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• 제19권2호
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• pp.139-147
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• 2019

본 연구는 최근 방사능 물질의 위험성에 대한 관심이 커지며 원전사고 등의 대규모 인명 피해와 위험지역 선정 등의 이유로 인체의 방사능 안전성에 대한 관심이 커지면서 요구되는 실내 건축용 마감재에 대한 것이다. 일상에서 방사능에 노출되는 여러 가능성 중 실내 공기 중 라돈가스에 대한 관심이 커지면서 라돈가스 흡착형 경화체에 대한 기초연구 자료를 제시한다. 본 연구에 흡착재로 활용된 재료는 규조토와 실리카겔로, 천연 흡착재인 규조토와 인공 흡착재인 실리카겔의 기초 성능 및 흡착 성능을 평가하였다. 향후 실내 공기 중 라돈가스 농도 저감에 대한 정밀한 추가 실험에 대한 연구결과가 필요할 것으로 예상되고, 실험결과에 따른 인공 흡착재인 실리카겔의 라돈가스 흡착 가능성을 기대한다.

• 대한방사선방어학회:학술대회논문집
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• 대한방사선방어학회 2009년도 춘계 학술발표
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• pp.124-125
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• 2009

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• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.27-28
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• 2019

Recently, a bed company detected a radon more than Red Politics and became a hot topic of conversation. This has led to increased interest in radon, and a number of free-of-charge bodies have also been established to recognize the dangers of radon. In addition, the Korean Institute of Geological and Resource Research is planning to assist the installation of radon alarm systems in 10,000 households nationwide, free of charge. Since radon is a colorless, odorless and tasteless gas that causes lung cancer, it aims to reduce lung cancer incidence by absorbing radon using bamboo activated carbon as a way to reduce it. Due to the use of bamboo activated carbon, radon concentration per hour tends to decrease as substitution rate increases, and table flow tends to decrease as substitution rate increases. Through this experiment, 30% of the replacement rate of bamboo activated carbon is judged to be the most suitable replacement rate.