• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.338-341
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• 2004

This study was carried out to understand the geochemistry of saline water circulating in an ash disposal pond of Seocheon power plant, Korea. For this study, ash pond waters, slurry water and seawater samples were collected and analyzed for major ions and trace elements. Results show that ash pond waters and slurry water are alkaline in nature due to high calcium content, and have high concentration of Ca, B, Li, As, Ba, Al, Si and Mn over seawater, suggest that these elements leached from fly ash even at high alkaline condition and ionic strength. Slurry water has high concentration of B, Ba, Li, Mn, Si and Sr compare to ash pond waters, expresses that these elements seem to be easily reached at initial stage fly ash-water interaction, and also might be associated with the surface of the fly ash particles. Additionally, PHREEQC program predicted several secondary solid phases, which are also influenced in the leaching of elements in to the saline water.

• 자원환경지질
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• 제28권2호
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• pp.147-154
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• 1995

Coal fly ashes collected from the Samcheonpo and the Seocheon Power Plants were analyzed for major and minor components and heavy metals such as As, Cd, Co, Cr, Cu, Ga, Hg, Mo, Ni, Pb, Sb, V and Zn in order to suggest basic data to apply coal fly ash as fertilizer or soil ameliorator. The specific gravity of the samples was less than 2.0, and amounts of organic matter range from 5.0% to 12.3%. The identified minerals by XRD were mainly quartz, mullite and pyrite in anthracite coal, and mainly quartz and mullite in bituminous coal. Generally, the contents of heavy metal elements analyzed were lower less than those of soil, though higher in some samples. Element couples of some elements( e.g., As-Mo, Zn ; Mo-As, Sb, V, Zn ; Sb-Zn ) show positive correlations with each other, but the high correlations of toxic elements such as As, Pb, Cd and Hg indicate to give attention to apply coal fly ash as fertilizer or soil ameliorator.

• 플랜트 저널
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• 제16권1호
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• pp.38-43
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• 2020

본 연구에서는 무연탄용 서천화력발전소 1호기가 대기환경보전법 및 서천화력발전본부 내부 규정인 이산화황 평균 배출 규제치를 준수하며 연속운전 할 수 있는 흡수탑 내부의 석회석 슬러리 pH의 적정 운전범위를 찾고자 실험 하였다. 연소가스의 유량등 주요 운전요소를 고정한 상태에서 탈황 흡수탑으로 유입되는 연소가스 내의 이산화황 농도, C_in[ppm]을 370, 400, 460 그리고 550 ppm으로 변동시키며 운전하였을 때, 탈황 흡수탑 내부 적정 슬러리 pH는 4.4, 4.5, 4.8 그리고 5.1이었다. 따라서, 이산화 황과 적정 슬러리 pH를 이용하여 도출된 상관관계식 R_pH=0.004×C_in+2.93을 이용하여 운전하는 것을 추천한다.

• 펄프종이기술
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• 제42권4호
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• pp.78-83
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• 2010

In this study, the possibility of the use of a new raw material in paperboard industry was investigated. Fly ash is one of the residues generated in the combustion of coal and generally captured from the chimney of coal-fired power plant. This material is utilized in many industries including cement, soil stabilization, composite etc., but it is not used in paper industry. Three types of fly ashes were collected from Hadong, boryeong and Seocheon steam power plants and we investigated their properties by scanning electron micrographs and particle size distribution. Papers were manufactured with KOCC and fly ashes, and the physical properties such as bulk, tensile strength, internal bond strength and ISO brightness were measured to identify the effects of fly ash on the paper properties.

• 한국수산과학회지
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• 제46권6호
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• pp.930-940
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• 2013

We evaluated contamination with organic matter and trace metals by analyzing grain size, ignition loss (IL), chemical oxygen demand (COD), acid volatile sulfide (AVS), and trace metals (Al, Fe, Cu, Pb, Zn, Cd, Ni, Cr, Mn, Hg, and As) in surface sediments at 28 stations around the Geum River estuary in July 2008. The surface sediments in the estuary were mainly composed of coarse sediment (sand and muddy sand), with mean grain size (Mz) ranging between $2-4{\O}$. The high concentrations of IL, COD, and trace metals were mainly found at stations in front of the Gusan outer port and industrial complex, and near the Seocheon coast with relatively fine sediments. In addition, the concentrations of IL and all trace metals, except Pb and As, showed good positive correlations with Mz, indicating that the concentrations of organic matter and trace metals were mainly dependent on sediment grain size. The concentrations of COD, AVS, and trace metals in most sediments did not exceed the sediment quality guideline (SQGs). Although the sediments in the study region are not polluted with organic matter and trace metals, there are many point sources of pollutants, such as Gusan port and industrial complex, Janghang refinery, and a thermoelectric power plant around the Geum River estuary. Thus, the management of coastal environments through periodic monitoring of organic matter and trace metals is required in the future.

• 화약ㆍ발파
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• 제41권3호
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• pp.62-72
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• 2023

1970년대 산업화에 따른 플랜트 구조물이 노후화됨에 따라 구조적 기능을 상실해 발파 해체 공법을 활용한 해체 철거 수요가 증가하고 있다. 발파 해체공법은 기계식 해체공법에 비해 해체 공기가 짧아 환경공해 발생 노출 시간을 최소화할 수 있지만 잘못된 발파 설계 및 시공 계획에 따른 붕괴거동의 실패는 안전성에 매우 큰 위험을 유발한다. 따라서 붕괴거동 모사를 통해 최적의 발파 해체 조건과 이에 따른 영향을 고려하는 것이 중요하다. 본 연구에서는 Finite element method (FEM)와 Discrete element method (DEM)의 장점을 활용해 구축된 3-D Combined finite discrete element method (FDEM) 코드 기반 3-D DFPA 를 적용해 (구)서천화력발전소의 연돌 구조물에 대한 해체 모사를 수행하였으며 실제 구조물의 연돌 구조물 발파해체의 붕괴거동과 비교 분석하였다. 수치 모사 결과, 실제 구조물과 붕괴 거동 및 붕괴 완료 시간이 동일하게 나타났다. 또한, 발파구간 개구부 상부에 위치한 후드부의 크기가 연돌의 붕괴거동에 미치는 영향을 분석하기 위해 후드부의 면적을 조정하여 해체 모사를 수행하고 균열 발생 양상 및 z-방향 변위 곡선을 통해 비교 분석하였다. 분석 결과, 후드부의 면적이 증가함에 따라 하중을 지지하는 면적이 줄어들고 그에 따른 균열 발생 증가 및 전도 시간 감소를 확인하였다.