• Journal of Soil and Groundwater Environment
• /
• v.12 no.1
• /
• pp.36-43
• /
• 2007

The objectives of soil investigation in risk assessment of contaminated sites are to characterize the level and area of contamination, and provide the important physical and chemical properties of contaminated sites for later exposure assessment. This study suggests two soil investigation strategies to be considered in the soil risk assessment in Korea. First, soil investigation for characterizing soil properties is additionally required to the current investigation method that has focused on chemical analysis. Second, application of statistical concepts to soil investigation plan and soil data analysis are required for confidential decison-making on contamination and determining the exposure soil concentration. This study provides a practical soil investigation strategy to involve the current Korean soil analysis guidance with the minimum sample number required for satisfying statistical limits.

• Economic and Environmental Geology
• /
• v.55 no.6
• /
• pp.563-570
• /
• 2022

This study was objected to show the complexity of groundwater flow system in a site-scale area as a design parameter of the groundwater monitoring network for early detection of pollutant leakage from a potential source of groundwater contamination (e.g., storage tank). Around the tanks, three monitoring wells were installed at about 22~25 m deep and groundwater level and temperature had been monitored for 22 months by 2-minute interval, and then compared with precipitation and temperature data from nearby weather station. Annual variation of groundwater level and its response to precipitation event, variation of groundwater temperature and delayed response to that of atmospheric temperature indicate the complexity of groundwater flow and flow paths even in the relatively small area. Thus, groundwater monitoring network for early detection of contaminant leakage should be designed with full consideration of the complexity of groundwater flow system, identified from the detailed hydrogeological investigation of the site.

• 한국지구물리탐사학회:학술대회논문집
• /
• 2001.09a
• /
• pp.57-74
• /
• 2001

The risk of the soil and groundwater that contaminated with petroleum is well known. The behaviour of petroleum in subsurface is governed by combined mechanism of several processes such as volatilization, adsorption, dissolution, biodegradation, etc. Large number of methods of remedial investigation and plan, therefore, have been developed and practiced. In application of the method, it is required engineer understands the mechanism of fate of petroleum in subsurface. So sampling procedures is very important for investigating the type of contaminants and their concentration as well as the selection of items that must be tested. For designing the remedial method, it is also required engineers to verify the structural formation of geology and the locational conditions of a land in detail, to familiar with the regulation, and to investigate the problems that can be happened after the performance was begun. In this paper it is shown that the investigation methods of contaminated land and the proper selection procedure of remedial method using the case history.

• Economic and Environmental Geology
• /
• v.51 no.2
• /
• pp.185-201
• /
• 2018

Nuclear power plants(NPP) are constructed and operated to ensure safety against natural disasters and man-made disasters in all processes including site selection, site survey, design, construction, and operation. This paper will introduce a series of efforts conducted in Korea Hydro and Nuclear Power Co. Ltd., to assure the safety of nuclear power plant against earthquakes and other natural hazards. In particular, the present status of the earthquake, fault, and slope safety monitoring system for nuclear power plants is introduced. A earthquake observatory network for the NPP sites has been built up for nuclear safety and providing adequate seismic design standards for NPP sites by monitoring seismicity in and around NPPs since 1999. The Eupcheon Fault Monitoring System, composed of a strainmeter, seismometer, creepmeter, Global Positioning System, and groundwater meter, was installed to assess the safety of the Wolsung Nuclear Power Plant against earthquakes by monitoring the short- and long-term behavioral characteristics of the Eupcheon fault. Through the analysis of measured data, it was verified that the Eupcheon fault is a relatively stable fault that is not affected by earthquakes occurring around the southeastern part of the Korean peninsula. In addition, it was confirmed that the fault monitoring system could be very useful for seismic safety analysis and earthquake prediction study on the fault. K-SLOPE System for systematic slope monitoring was successfully developed for monitoring of the slope at nuclear power plants. Several kinds of monitoring devices including an inclinometer, tiltmeter, tension-wire, and precipitation gauge were installed on the NPP slope. A macro deformation analysis using terrestrial LiDAR (Light Detection And Ranging) was performed for overall slope deformation evaluation.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.28 no.3C
• /
• pp.187-196
• /
• 2008

An earthquake of magnitude 5.0 occurred at Ssang-gye-sa, a Buddhist temple in Jirisan, located near the southern border of the Korean peninsula on 4 July 1936. It resulted in severe damage of several buildings and structures in Ssang-gye-sa. Particularly, the top component of a five-story stone pagoda in the temple was tipped over and fell down during the earthquake. This earthquake damage case would be usefully applied to estimating the intensity of ground motion in the Korean peninsula, a moderate seismicity region, where strong motion has never been recorded with the exception of historic seismic events. In order to estimate the local site effects and the corresponding ground motion at Ssang-gye-sa site, intensive site investigations including borehole drilling and in-situ seismic tests such as crosshole and SASW tests were performed in the temple area. Based on the site characteristics, site-specific seismic response analyses using various input motions were conducted for a representative Ssang-gye-sa site by means of both one-dimensional equivalent-linear and nonlinear methods with six input rock outcrop acceleration levels ranging from 0.044g to 0.220g. The resultant site-specific seismic responses indicated the amplified ground motions in the short-period range near the site period of Ssang-gye-sa. Furthermore, the intensity on rock outcrop of the 1936 Jirisan earthquake was estimated by making a comparison between the site responses analysis results in this study and the full-scaled seismic test of pagoda model in the prior study.

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2004.06a
• /
• pp.226-227
• /
• 2004

본 연구에서는 원자력 연구소 내에 건설할 고준위 폐기물 지하처분연구시설 부지에 관한 특성을 파악하고, 연구시설의 위치를 선정하기 위한 지질학적 연구를 실시하였다. 지표지질조사를 통하여 연구소 내에 분포하는 암석들의 분류와 선구조 분석을 실시하였고, 지구물리탐사와 시추조사를 통한 지하 암반의 분포양상과 연구시설 주변의 추정되는 파쇄대의 분포를 확인하였다. 지표지질조사결과 복운모화강암과 화강섬록암질 편마암이 점이적인 관계로 분포하고 있으며 (Fig.1, 3), 이들 화강암류 내에는 암맥상으로 중성 혹은 염기성 암맥들이 절리의 방향과 동일하게 관입 분포한다. 절리의 방향성은 N30E, N80W, NS방향으로 분포하고 있다(Fig. 2).(중략)

• Journal of the Korean Geotechnical Society
• /
• v.17 no.6
• /
• pp.69-83
• /
• 2001

In order to make use of finished municipal landfill as a construction site, it is necessary to consider environmental and geotechnical aspects for the ground improvement and application of waste landfill. In environmental aspect, methods for management of landfill gas and leachate have to be established, and in geotechnical aspect, it is necessary to investigate available method for constructing structure foundation. In this study, the finished landfill was selected for pilot test. Investigation about the environmental characteristics of the waste landfill was performed to establish the methods far management of landfill gas according to monitoring the gas quantity and to investigate economical efficiency according to utilizing landfill gas. Investigation about cases of utilizing the waste landfill in Korea and abroad as construction site was performed and pilot tests were performed to analyze the improvement effects of methods such as dynamic compaction method and PG pile method available to waste landfill. The results of this study showed that economical profits could be gained by utilizing landfill gas and improved waste landfill, besides, dynamic compaction method was effective in case of improvement depth being shallow, and PG pile method was effective in case of improvement depth being deep.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
• /
• v.9 no.3
• /
• pp.149-159
• /
• 2011

Nuclear power utilities should establish a site-specific groundwater monitoring program for early detection of unplanned radioactive material's releases which can occur due to degradation of systems, structures and components of the nuclear power plants in order to keep the impact of the unplanned releases on the environment and the residents as low as reasonably achievable. For this end, groundwater flow on site should be evaluated based on characterization of the hydrogeology of a site of concern. This paper aims to provide data necessary for establishing groundwater monitoring program which is currently considered at Kori nuclear power plant 1 by characterizing groundwater flow system on the site based on the existing hydrogeological studies and related documents, and by modeling tritium transport. The results showed that the major groundwater flow direction was south-west and that most of groundwater entered a southern and eastern seas. Although the tritium plume also released into the sea, its rate was delayed by dewatering sump.

• Economic and Environmental Geology
• /
• v.51 no.2
• /
• pp.121-130
• /
• 2018

The KURT (KAERI Underground Research Tunnel) is a research tunnel which is located in KAERI (Korea Atomic Energy Research Institute) site. At KURT, researches on engineering and natural barrier system, which are the most important components for geological disposal system for high level radioactive waste, have been conducted. In this study, we synthesized the site characteristics obtained by various types of site investigation to introduce the geological model for KURT site, and induced the 3-D hydrogeological model for KURT site from the geological model. From the geological investigation at the surface and boreholes, four geological elements such as subsurface weathered zone, upper fractured rock, lower fractured rock and fracture zones were determined for the geological model. In addition, the geometries of these geological elements were also analyzed for the geological model to be three-dimensional. The results from 3-D geological model were used to construct the hydro-geological model for KURT site, which is one of the input data for groundwater flow modeling and safety assessment.

• Proceedings of the KAIS Fall Conference
• /
• 2009.12a
• /
• pp.53-56
• /
• 2009

본 연구는 생태면적률을 교육시설에 적용하기 위한 프로세스 개선에 관한 연구로 수행되었다. 생태면적률은 최근 시행되기 시작한 개발사업에 대한 환경지표로 생태환경보전에 매우 중요한 역할을 담당할 것으로 전망되고 있다. 본 연구에서는 관련 선행연구 및 제도, 기준고찰을 통하여 생태면적률에 관한 국내외의 동향을 파악하고, 교육시설에 생태면적률을 적용하기 위한 실태파악을 위하여 일차적으로 중부권 C시의 초등학교를 중심으로 적용된 대지 및 체육장 면적분포, 교지 대비 체육장 비율, 조경면적, 친환경 인증 등에 관한 현황조사를 수행하였다. 본 연구의 실태조사 결과를 통하여 교육시설의 부지조성 특성에 따른 부지유형을 도출하였고, 부지유형별 생태면적률 적용 프로세스를 제안하고, 제도적 적용을 검토하기 위하여 공공부문의 도시 건축 및 환경분야 종사자 및 건축사의 생태면적률에 관한 인지도를 알아보기 위한 설문을 수행하였다. 본 연구의 결과 교육시설의 계획특성에 부합되는 생태면적률 적용 프로세스를 제안하였다.