환경시료 분석을 통한 라돈 분포특성 및 영향평가 방법론 연구

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라돈, 토양, 지하수, 건축자재, 실내공기
Due to urbanization, industrialization modern citizens live most of the day indoors. As time for activities indoors gets longer, the importance regarding the pollution of indoor environment can be recognized and pollution of indoor environment can be said to be an important factor which has a harmful effect on human health. Contained in floors, ceilings or surrounding soil or walls of buildings, radon of indoor air pollution sources seeps into the building gap and comes into the body when breathing, increasing exposure dose and also causes various cancers. For this radon, we were to investigate the distribution characteristics of the radon concentration in soil and groundwater in Gwangju and carry out a radon investigation for Gwangju through the feature analysis of indoor radon concentration and building materials.
Radon contained in groundwater through 25 tubular wells was measured and as a result, radon of 1 tubular well is 121.76 Bq/L, exceeding the WHO criterion (100 Bq / L) and that of 20 tubular wells exceeded U.S. EPA drinking water standard concentration(11.1 Bq/L) and higher radon concentrations were shown in tubular wells whose basement rock is granite.
In the case of radon among soil pores, the measurement was performed targeting 28 points and average 25,000 Bq/m3 level was shown and some points showed maximum 125,365Bq/m3 and generally, higher radon concentrations were shown in granites.
For building materials, three kinds of cement and three kinds of plaster tex were analyzed and plaster tex and cement showed the radon radiation of 47.07 ~ 232.78 Bq/kg·h and the radiation of 7.25 ~ 10.15 Bq/kg·h, respectively. Radium equivalent activity, external exposure hazard index and absorbed gamma dose rate through HPGe analysis also showed less than the standard value.
For indoor radon, 10 households out of 74 households exceeded 74 Bq/m3, a US recommended home repair figure and even if one of them exceeded indoor air limit 148 Bq/m3, the average is 42.5 ± 29.8 Bq/m3, showing a figure lower than the national average.
These radon distribution characteristics of Gwangju were examined and as a result, risk seems to be insignificant except for groundwater but given that most water intake points of groundwater exceed the US drinking water standard, drinking limit, reduction and measures seem to be urgent when approving and permitting groundwater tubular wells in granite bedrock areas.
Alternative Title
Study of Radon Distribution and its Impact Assessment Methodology
Alternative Author(s)
Ju, Yong - jin
일반대학원 원자력공학과
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목 차


제1장 서 론 1

제2장 본 론 4
제1절 이론적 고찰 4
1. 라돈의 특성 4
2. 라돈의 자핵종 및 모핵종의 특성 4
3. 라돈의 위해성 8
제2절 지하수 라돈농도측정 13
1. 측정 장비 및 방법 13
2. 라돈농도 실험결과 27
3. 지질과의 상관관계 조사 27
제3절 토양 라돈농도측정 34
1. 측정 장비 및 방법 34
2. 라돈농도 실험결과 39
제4절 건축자재에서의 라돈농도측정 43
1. 측정 장비 및 방법 43
2. 라돈농도 실험결과 49
3. HPGe 분석결과 50
제5절 실내 라돈농도측정 53
1. 측정 장비 및 방법 53
2. 실내 라돈농도 실험결과 56
제6절 광주광역시 라돈위험도 59

제3장 고 찰 60

제4장 결 론 62

참고문헌 64
주용진. (2016). 환경시료 분석을 통한 라돈 분포특성 및 영향평가 방법론 연구.
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General Graduate School > 4. Theses(Ph.D)
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