• 방사성폐기물학회지
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• 제15권3호
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• pp.239-256
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• 2017

방사성폐기물 지층 처분을 위한 부지 선정 과정에서 심층 처분장의 안전성을 평가하는데 필요한 입력 자료를 제공하기 위해 부지특성조사를 수행한다. 본 논문에서는 부지특성조사를 선도하여 수행하였던 해외 사례를 분석하고, 국내에서 방사성폐기물 처분을 위해 수행해야 할 부지특성조사 방법을 제안하고자 하였다. IAEA가 고려하는 부지특성조사 방법은 단계별 부지특성조사로 본 논문에서 소개된 해외의 경우도 이 방법을 따르고 있는데, 부지특성조사는 시기별, 조사 항목별로 다수의 지역에서 개략적인 부지의 정보를 도출하는 예비 부지특성조사와 조사 결과 선정된 지역에서 보다 자세한 부지특성자료를 생산하기 위한 상세 부지특성조사로 구분할 수 있다. 특히, 상세 부지특성조사 단계에서는 조사지역에 장심도 시추공을 굴착하여 심부 영역에 대한 지질 특성을 바탕으로, 수리지질, 수리-지화학, 암석역학, 열, 용질이동에 대한 특성을 도출해야 한다. 단계별 부지특성조사를 통해 도출된 부지 고유의 지질환경 특성은 부지특성모델로 구축되어야 하는데, 이를 종합하여 해석해야 비로소 조사지역의 부지특성을 이해하고, 지층 처분에 보다 유리한 부지를 최종 후보지역으로 선정할 수 있는 것이다. 해외 사례를 살펴본 결과, 부지특성조사 단계에 소요되는 시간은 대략 7~8년이 소요될 것으로 예상되나, 이를 계획하고 수행하는 시스템이 뒷받침 되지 않을 경우 보다 지연될 수 있을 것이다.

• Earthquakes and Structures
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• 제13권1호
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• pp.79-87
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• 2017

Seismic analysis of local site conditions is fundamental for a reliable site seismic hazard assessment. It plays a major role in mitigation of seismic damage potential through the prediction of surface ground motion in terms of amplitude, frequency content and duration. Such analysis requires the determination of the transfer function, which is a simple tool for characterizing a soil profile by estimating its vibration frequencies and its amplification potential. In this study, numerical simulations are carried out and are then combined with a statistical study to allow the characterization of design sites classified by the Algerian Building Seismic Code (RPA99, ver 2003), by average transfer functions. The mean transfer functions are thereafter used to compute RPA99 average site factors. In this regard, coming up seismic fields are simulated based on Power Spectral Density Functions (PSDF) defined at the rock basement. Results are also used to compute average site factor where, actual and synthetic time histories are introduced. In absence of measurement data, it is found that the proposed approach can be used for a better soil characterization.

• Nuclear Engineering and Technology
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• 제38권6호
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• pp.575-584
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• 2006

As the development of total management systems for sites along with site environmental information is becoming standard, the system known as the Site Information and Total Environmental database management System (SITES) has been developed over the last two years. The first result was a database management system for storing data obtained from facilities, and a site characterization in addition to an environmental assessment of a site. The SITES database is designed to be effective and practical for use with facility management and safety assessment in relation to Geographic Information Systems. SITES is a total management program, which includes its database, its data analysis system required for site characterization, a safety assessment modeling system and an environment monitoring system. It can contribute to the institutional management of the facility and to its safety reassessment. SITES is composed of two main modules: the SITES Database module (SDM) and the Monitoring & Assessment (M&A) module [1]. The M&A module is subdivided into two sub-modules: the Safety Assessment System (SAS) and the Site Environmental Monitoring System (SEMS). SAS controls the data (input and output) from the SITES DB for the site safety assessment, whereas SEMS controls the data obtained from the records of the measuring sensors and facilities. The on-line site and environmental monitoring data is managed in SEMS. The present paper introduces the procedure and function of the M&A modules.

• Nuclear Engineering and Technology
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• 제53권1호
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• pp.234-243
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• 2021

In the research or project planning for the decommissioning of a nuclear power plant, one of several preparations will be the establishment of a list of potential radionuclides to be considered at the time of characterization or final status surveys. Reliable data for selection of potential radionuclides during the transition period to prepare for decommissioning will depend heavily on historical data at the site or, where possible, sampling analysis. However, during the transition period, direct sampling can be challenging, depending on the circumstances of the site or national regulation. A methodology of selecting potential radionuclides for nuclear facility sites which largely consists of three major processes: production of initial list of radionuclides, selection of the insignificant radionuclide that will be eliminated, and consideration of site characterization or sampling. For developing a preliminary list of potential radionuclides for Kori Unit 1 decommissioning, the list of initial radionuclides was made referring to the technical documents applied at decommissioned NPPs in the U.S and additional reference materials applied until the operation of NPPs in Korea. For the screening of insignificant radionuclides, we applied criterion of less than 0.1% of the amount of radioactivity inventory and confirmed the dose fraction using the RESRAD code. The final suit of radionuclides was established, which should be supplemented by reflecting site characterization and sampling process in the future. Thus, the methodology and results for the selection of potential radionuclides suggested in this paper can give an insight as a future reference to deriving DCGLs in relation to site remediation of decommissioning nuclear plants.

• 방사성폐기물학회지
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• 제14권3호
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• pp.267-277
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• 2016

노후 원전 해체의 경우 부지 특성 및 최종 상태 조사 보고서에 해당 부지내 잔존가능성이 있는 방사성 핵종 정보에 대한 내용을 포함하여야 한다. 미국 NRC의 경우 이에 해당하는 해체기술관련문서(DTBD)를 부지 특성 조사시에 부지이력조사(HSA)와 같이 사업자 측이 제출하도록 규제하고 있다. 또한 해체기술관련문서는 방사선학적 부지 조사와 해체완료계획서에 포함되어야 하는 내용으로써 부지 규제 해제와 재이용에 관해서 중요한 자료를 제공한다. 이 논문은 부지 별 잠재적 핵종에 대해 미국 원전의 해체 사례중 부지 특성 및 최종 상태조사 과정에서 결정하는 방법론을 분석하고 2017년 고리 1호기의 영구 운전정지 후 이루어질 해체 과정에 필수적인 규제 지침과 기술적 근거 수립에 도움이 되고자 한다.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVII)
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• pp.619-619
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• 2005

• Structural Engineering and Mechanics
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• 제54권2호
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• pp.363-378
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• 2015

Estimation of geotechnical properties is an essential but challenging task since they are major components governing the safety and reliability of the entire structural system. However, due to time and budget constraints, reliable geotechnical properties estimation using traditional site characterization approach is difficult. In view of this, an alternative efficient and cost effective approach to address the overall uncertainty is necessary to facilitate an economical, safe and reliable geotechnical design. In this paper a probabilistic approach is proposed for real-time updating by incorporating new geotechnical information from the underlying project site. The updated model obtained from the proposed method is advantageous because it incorporates information from both existing database and the site of concern. An application using real data from a site in Hong Kong will be presented to demonstrate the proposed method.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.286-289
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• 2004

On site, In situ soil remediation technologies are very important among the remediation technologies and in general efficiency of these technologies are turned to site characterization and environmental condition. specially using of only one technology has so many limitation factors. for example, existing state of tailing and channeling and so on. actually, filled land have high concentration cation exchange capacity because of existence in abundance soil organic matter. Therefore we used various on site in Situ technologies by phase for overcome the limitation factors. Target site is petroleum (diesel) impacted filled land and using technologies are SVE(Soil Vapor Extraction), BV(Bioventing), Bioremediation, Soil flushing, Chemical oxidation.

• BMB Reports
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• 제29권5호
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• pp.448-454
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• 1996

Bacteriophage ${\phi}FC1$ is a temperate phage which was identified as a prophage in the Enterococcus faecalis KBL703 chromosome. Phage ${\phi}FC1$ integrates into the host chromosome by site-specific recombination. The phage attachment site P (attP) was localized within the 0.65-kb XhoI-HindIII fragment and the nucleotide sequence of the region was determined. An open reading frame (mj1) which adjoined the phage attachment site encoded a deduced protein related to the site-specific recombinase family. The organization of this region was comparable to other site-specific recombination systems. The molecular weight of the expressed MJ1 in E. coli was in good agreement with the predicted 53,537 Da of the mj1 gene product. Elucidation of the phage-specific integration process in this study would provide useful genetic tools such as a chromosomal integration system.

• 방사성폐기물학회지
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• 제6권4호
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• pp.245-255
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• 2008

중 저준위방사성폐기물 처분부지에 대한 건설 및 운영 인허가 취득을 위한 종합적인 부지특성조사가 사업자인 한국수력원자력(주)의 책임 하에 이루어졌으며, 수리지질조사는 부지의 수리지질학적 특성 해석과 방사선적 안전성 평가를 위한 기초자료 생산을 목적으로 수행되었다. 처분부지의 수리지질특성은 주로 지표에서 이루어진 지질조사, 시추조사, 각종 수리시험 및 지구물리탐사 자료를 종합적으로 분석하여 수리지질체계의 특성을 평가하고, 이를 토대로 수리토양영역, 3 개의 수리암반영역 및 5 개의 투수성구조영역으로 구성되는 수리-구조모델을 제시하였다. 본 논문에서 제시된 수리-구조모델과 수리인자는 지하수유동모델 해석 업무에 직접 이용되었다. 본 논문의 결과는 지표조사단계에서 얻어진 자료에 근거한 것이므로 수리지질특성과 관련된 제반 조사방법에 가정과 불확실성이 내재되어 있다. 따라서 현재 진행 중인 지하시설 건설과정에 취득되는 직접적인 수리지질특성 관련 자료를 종합적으로 재 해석함으로써 부지특성조사 단계에서의 가정과 불확실성을 저감시킬 수 있고, 최종적인 수리-구조모델의 신뢰성 향상을 기대할 수 있다.