• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.414_415
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• 2009

최근 도시 환경개선의 일환으로 지중배전선로 구성의 확대요구가 증대되면서 경제적이고 공급신뢰도가 높은 최적의 계통을 구성하고, 우리나라 도시환경에 적합한 지중선로용 기기 개발에 대한 필요가 요구되어지고 있다. 신 지중배전기기 도입시 배전자동화 시스템과의 연계를 포함한 계통운영 적정성, 배전선로 운용 효율성, 유지 보수 용이성, 안전성, 환경성 등 개발 타당성에 대한 검토와 함께 부속 기자재에 대한 적정 규격 및 시설 그리고 운영에 대한 기준안이 절실히 요구되고 있는 실정이다. 따라서 본 논문에서는 국외 및 국내에서 개발된 신 지중배전기기의 검토를 통해 새로운 배전계통에서 사용할 수 있는 신지중배전기기의 특성에 대해 제시하였다.

• Proceedings of the KIEE Conference
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• 2000.07a
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• pp.182-184
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• 2000

There are several facilities in Kochang distribution test center such as artificial fault generator(AFG), new distribution automation system(NDAS), communication networks (wireless and optic), lumped constant circuit, switches for distribution automation, overhead and underground distribution line. We have been field testing on remote control, data acquisition. remote metering, feeder automation and so on for distribution automation using those equipment.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1998.11a
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• pp.221-224
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• 1998

Environmental pollution is continuously increasing with the economic growth and industrial development. With this trend, soil and groundwater pollution problem has been surfaced as important social issues. Recently, Korean government promulgated the Soil Environment Conservation Act. But there are many problems to control sound soil quality management. Anthropogenic source of pollution such as waste landfill, pesticides, fertilizer, underground storage oil tanks is important as well as natural source such as acid rain and forest fire. The regulation should be expanded to include groundwater preservation as well as soil quality, because soil pollution is closely related to groundwater pollution. Therefore, legal regulations must be expanded to these facilities and take into account technical feasibility and finance.

• Proceedings of the Korean Geotechical Society Conference
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• 2010.03a
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• pp.791-800
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• 2010

This paper presents the construction status and the conceptual designs of midium and high level radioactive waste disposal facilities from all around world. For the midium radioactive waste, a shallow disposal using trench or a deep depth disposal are adopted. However, these are rather focusing on the social and cultural point of view than the technical. Meanwhile, the high level radioactive waste is basically disposed in the deep underground. The corresponding ground conditions are usually dense and composed of sedimentary and crystalline rocks mainly with low permeability. A barrier system is made of canister which consists of copper, titanium, and tin. The inner and outer side of the canister are composed of different materials respectively.

• Proceedings of the Korean Geotechical Society Conference
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• 2010.03a
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• pp.14-25
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• 2010

The Yi Sun-Sin grand bridge is the suspension bridge which connects Myodo and Gwangyang. It is over the main navigation channel of Gwangyang Harbor. South anchorage(AN1, Myodo side) of the bridge is designed as rock anchored type. It sustains using the resistance of the underground rock's mass in Myodo. As this type of anchorage can minimize the exposure of the structure, It is economically efficient and environmentally friendly. North anchorage (AN2, Gwangyang side) is designed as the gravity type. This anchorage is 68 meters in diameter and use its own weight to support. Instead of normal rectangular diaphragm wall, the circular shape diaphragm wall is adopted to the north anchorage. It doesn't need to use internal temporary facilities, so it can significantly improve the constructability of the structure.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.927-930
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• 2008

Recently, the scale and form of the construction promoting in government and private organization have large scaled town. The underground area of whole town are used for every facilities, and most of concrete area are used for greening part for friendly environment construction. This greening part for concrete area have good point such as being amendment and various economical effect and improvement for environmental problem, moreover, the amount of greening part become great increased. For this factor, we have to newly consider to keep durable safety for concrete structure, therefore, we suggest that how to keep structural safety of greening area on the concrete.

• 한국정보통신설비학회:학술대회논문집
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• 2004.08a
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• pp.230-233
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• 2004

현재 KT의 관로포설 공법은 관 상부 토피 1m를 확보한 상태에서 차량하중이 작용한다는 가정하에서 제정된 것이며, 토피 1m를 확보하지 못하는 구간에는 별도의 보강공법을 적용하고 있다. 그러나 현재 관로공사의 대부분을 차지하는 도로유관공사는 도로 조성이 종료되는 시점에는 토피 1m를 확보하지만, 도로조성 공사기간 중에는 별도의 보강공사 없이 토피 60cm 내외에서 공사 차량의 하중이 관로에 그대로 전달되고 있어 관로의 찌그러짐 현상이 발생하고 있다. 본 논문은 이와 같은 조건에서도 고품질의 관로를 확보하기 위하여 현행 FC관로 뿐만 아니라 지하매설관으로 사용되는 각종 재질의 관에 대한 특성을 검토하였으며 매설관 변형실험을 통하여 도로유관공사에 적합한 관로재질을 제시하였다.

• 한국지구물리탐사학회:학술대회논문집
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• 2003.11a
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• pp.206-213
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• 2003

Laboratory testing of representative rock specimens is of fundamental necessity for the successful design and/or assessment of facilities associated with many kinds of underground exploitation, including the geological disposal of radioactive nuclear waste. As a fundamental and systematic study, a series of measurements of the physical, mechanical and hydraulic properties of Inada granite and Shirahama sandstone, two rock types that are widely available in Japan, have been performed. This paper presents the results of a study of the effective porosity, density, compressive and shear wave velocity, unconfined compressive strength and permeability of the two rocks. The anisotropy and the effects of confining pressure on the permeability of the rocks, as well as the relationships among the physical, mechanical and hydraulic properties, are also investigated and discussed.

• Nuclear Engineering and Technology
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• v.38 no.6
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• pp.561-574
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• 2006

This study presents the results of an economic analysis for a comparison of the single layer and double layer alternatives with respect to a HLW-repository. According to a cost analysis undertaken in the Korean case, the single layer option was the most economical alternative. The disposal unit cost was estimated to be 222 EUR/kgU. In order to estimate such a disposal cost, an estimation process was sought after the cost objects, cost drivers and economic indicators were taken into consideration. The disposal cost of spent fuel differs greatly from general product costs in the cost structure. Product costs consist of direct material costs and direct labor and manufacturing overhead costs, whereas the disposal cost is comprised of construction costs, operating costs and closure costs. In addition, the closure cost is required after a certain period of time elapses following the building of a repository.

• Journal of the Korea Institute of Building Construction
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• v.8 no.4
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• pp.61-69
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• 2008

The size of the construction projects become huge and complex, and the depth of excavation for the underground structures become deeper. Also the working area is not enough for loading materials and temporary facilities. This is the most case of recent construction projects in downtown area. Top-down is the most useful method for this kind of construction projects. Top-down construction method consists of supporting method, retaining wall type, foundation type and construction direction such as up-down or up-up. construction managers have to select sub-elements for top-down construction method in planning phase. This study is to suggest the sub-elements selection model for the top-down construction method, and the case study is conducted for evaluating this model.