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NTIS 바로가기Journal of nuclear fuel cycle and waste technology = 방사성폐기물학회지, v.12 no.4, 2014년, pp.275 - 286
이정환 (한국원자력환경공단) , 정해룡 (한국원자력환경공단) , 정재열 (한국원자력환경공단) , 박주완 (한국원자력환경공단) , 윤시태 (한국원자력환경공단)
This study evaluated the evolution stage and origin of chemical components of 12 boreholes at crystalline bedrock using multivariate statistical and groundwater quality analyses. Groundwater types are mostly belonged to Na(Ca)-
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핵심어 | 질문 | 논문에서 추출한 답변 |
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지하수 화학이 제공하는 정보는 어떤 특성을 규명하는가? | 그 중에서 지하수 화학은 지하수 침투, 방사성 핵종의 용해도, 이동 및 생태계로의 유출 등의 특성에 일차적으로 영향을 미친다. 또한 현재 부지의 수리지구 화학적 조건 뿐만 아니라, 향후 안전성을 예측하기 위한 시간 종속적 경계조건을 설정하기 위해 요구되는 심부 지하수 시스템의 과거 진화 특성을 규명하는데 기초 정보들을 제공한다[5]. | |
원자력 발전 후 발생되는 방사성폐기물의 안전한 관리 방안 모색이 대두되는 이유는 무엇인가? | 전 세계적으로 화석연료의 고갈과 이들의 과도한 사용으로 인해 야기된 대기 오염 및 지구 온난화 등 부작용 때문에 대체에너지로 원자력 에너지 사용의 확대가 증가됨에 따라, 원자력 발전 후 발생되는 방사성폐기물의 안전한 관리 방안 모색이 점차 대두되고 있다[1]. 방사성폐기물의 지층 처분목표는 방사성폐기물을 생태계로부터 그 위해성이 정의되는 기간까지 격납 및 격리할 수 있는 시설 또는 위치에서 폐기하는 것이다[2]. | |
요인분석이란 무엇인가? | 연구지역의 공간적인 지하수 수질 진화 특성을 규명하기 위해서 다변량 분석 중에서 요인분석(factor analysis)을 수행하였다. 요인분석은 대규모 자료집단을 단순화하고 체계화하여 일반화시킴으로서 자료의 의미를 고찰하는 기법으로서, 상관성이 큰 최초 변수들로 집단화할 수 있다[14]. 요인 추출 모델은 보통 PCA(Principal Component analysis) 기법으로 도출되며 1 이상의 고유값(eigenvalue)을 선택하고, 각 요인들에 대한 요인적재의 분산을 최대화하도록 베리맥스(Varimax) 직각회전 방식을 이용하여 요인들에 대해 직교변환 절차를 수행한다[15]. |
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