• Nuclear Engineering and Technology
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• 제51권4호
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• pp.1037-1040
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• 2019

For the past 50 years, graphite has been widely used as a moderator, reflector and fuel matrix in different kinds of gas-cooled reactors. Resulting in approximately 250,000 metric tons of irradiated graphite waste. One of the most significant long-lived radioisotope from graphite reactors is carbon-14 ($^{14}C$) with a half-life of 5730 years, this makes it a huge concern for deep geologic disposal of nuclear graphite (NG). Considering the lifecycle of NG a number of waste management options have been developed, mainly focused on the achievement the radiological requirements for disposal. The existing approaches for recycling depend on the cost to be economically viable. In this new study, an affordable process to remove $^{14}C$ has been proposed using samples taken from the Nuclear Power Plant in Latina (Italy) which have been used to investigate the capability of organic and inorganic solvents in removing $^{14}C$ from exfoliated nuclear graphite, with the aim to design a practicable approach to obtain graphite for recycling or/and safety disposed as L& LLW.

• 대한안전경영과학회지
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• 제17권3호
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• pp.105-113
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• 2015

The incidents related to transporting hazardous materials may cause serious impacts on neighborhood and surrounding areas. It is essential to have a real-time safe management system for incidents prevention of transporting hazardous materials. Currently, the system is not integrated into one channel, which makes it difficult to control an incidents response. Another problem is that event status is not appropriately shared among authorities having responsibilities taking down the incidents. This paper investigates previous studies covering the real-time safety management system for hazard material transports and suggests an integrated management system that helps communicate effectively and promptly.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2006년도 춘계학술대회
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• pp.381-391
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• 2006

When the environmental materials of the raw and sub material to applied in electronic goods removed, the reliability assessment and the forecasting is stand on the low level and in case of neglect, it is acting as latent defect that can be connected to large size disaster. In this research, the study on the management method of environmental restriction substances which is recognized as important element in the reliability assessment about environmental material of electronic goods and the study on reliability assessment method of PWB without environmental material are progressed

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1383-1387
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• 2009

As information technologies in construction field get developed, various studies and projects are in progress for improvement of construction industry. Meanwhile, web-basis online system for building materials is tending upward. However, most of the informations about classification system for building materials and specifications are not systematic yet. Most field staffs have some troubles in making full use of the material information, repeating inefficient works from constructional design to the maintenance of it. This study designed auto-categorization system classified by materials, multi-search engines, auto-converting/creating electronic catalog as well as RFID search support to provide standardized building materials information.

• 산업공학
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• 제21권1호
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• pp.131-140
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• 2008

To shorten product development time and cost, integrated information managements of product, manufacturing process and resource are essential. In the area of material addressing, process engineers should make their decisions in the manner of collaborative engineering in order to reduce the manufacturing preparation time and cost in the product development and production. A digital virtual factory which is an united digital model of entire factory could be very useful for these areas. In this paper, the digital virtual factory is constructed and used for material addressing and analysis of an automotive general assembly shop. We developed the material addressing system for automotive general assembly shops using digital virtual factory models and nesting algorithms, and applied it to realistic problems of a Korean automotive company as an convenient and effective way of material addressing.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.1017-1021
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• 2005

There is a need for effective tracking and control of material loading and delivery time especially during the finishing-work phases to eliminate the need for lay-down space on the site. Hence, it is essential to monitor the relevant information regarding material procurement in construction sites, and it is also the key factor for successful site control and the adoption of the Just-in-Time concept for high-rise building construction. The purpose of this study is to test RFID's readability in order to develop a finishing material monitoring system through the application of RFID technology.

• 한국경영과학회지
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• 제18권2호
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• pp.105-130
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• 1993

This study deals with finding a schedule for the movement of a material handling device (elevator) in a manufacturing plant. Two different algorithm (Traveling Salesman Technique and Greedy Algorithm) are used in the scheduling of the elevators using a simulation technique to determine the proper method of scheduling the elevator movement. Based on the simulation analysis, we have found that the Greedy algorithm serves better than the algorithm based on Traveling Salesman technique for scheduling the movement of a material handling device in the manufacturing plant.

• 한국건설관리학회논문집
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• 제12권4호
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• pp.59-69
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• 2011

최근 건설 공사가 대형화, 복잡화되어 감에 따라 건설 산업에서는 Information Technology (IT) 기술의 도입을 통한 생산성 향상을 추구하며, 보다 효율적인 건설 관리 방안을 도출하고자 한다. 이러한 배경을 바탕으로 다양한 종류의 건설 관리시스템 (Project Management System)이 도입되고 있으며, 이와 더불어 Personal Digital Assistant (PDA), Bar Code, Radio Frequency Identification (RFID), Web Camera 등의 다양한 IT 기술이 적용되고 있는 상황이다. 그러나 이와 같은 기술들은 실시간 정보처리 기술의 부족, 건설 현장과 관리 오피스의 이원화 등으로 인하여 정보의 재작업 및 비효율성을 초래하여, 데이터의 저장 및 데이터베이스 (Database) 기능을 제외한 부분에서는 오히려 건설 생산성을 저해시키고 있는 상황이다. 이에 본 연구는 설문조사를 바탕으로 기존 관리상의 문제점을 파악하고, 요구사항 분석을 통하여 기능을 도출함으로써 건설 자재 관리 부문에 있어 건설 현장 내 적용성이 뛰어난 어플리케이션을 개발하고자 한다. 본 연구에서 개발하고자 하는 건설 자재 관리 어플리케이션은 정보의 자동 입력, 자재 정보의 실시간 처리 및 확인, 조달 자재 위치 확인을 가능하게 하여 건설 현장과 관리 오피스 간의 이원화 문제를 해결하도록 한다. 이와 더불어 최신 IT 디바이스 (Device)인 스마트폰의 건설 현장 내 도입 가능성 및 적용성을 확인해 보고자 한다.

• 환경영향평가
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• 제11권3호
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• pp.205-221
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• 2002

Environmental impact assessment (EIA) is a tool used in planning development strategies and projects, and its use has been adopted into planning regulations in a number of countries. EIA has progressed from the consideration of pollution assessment, through the wider range of ecological assessment. Now EIA is required to consider the textbook of university students. Students taking lesson on EIA textbook are generally majoring in a variety of subjects, including environmental engineering, environmental health, environmental science, city planning, civil engineering, public policy, economics, and applied earth sciences. However, substantiality program of teaching material on EIA textbook has not been studied at expert society in the meantime, though a number of EIA textbook have been published every year in Korea. In current study, we presented the point at issue and improvement method of teaching material of EIA for student using domestic and foreign teaching materials and papers.

• Industrial Engineering and Management Systems
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• 제12권3호
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• pp.181-189
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• 2013

This paper proposes a two-phase genetic algorithm (GA) to solve the problem of obtaining an optimum configuration of a paired single row assembly line. We pair two single-row assembly lines due to the shared usage of several workstations, thus obtaining an optimum configuration by considering the material flow of the two rows simultaneously. The problem deals with assigning workstations to a sequence and selecting the best arrangement by looking at the length and width for each workstation. This can be considered as an enhancement of the single row facility layout problem (SRFLP), or the so-called paired SRFLP (PSRFLP). The objective of this PSRFLP is to find an optimal configuration that seeks to minimize the distance traveled by the material handler and even the use of the material handler itself if this is possible. Real-world applications of such a problem can be found for apparel, shoe, and other manual assembly lines. This research produces the schematic representation solution using the heuristic approach. The crossover and mutation will be utilized using the schematic representation solution to obtain the neighborhood solutions. The first phase of the GA result is recorded to get the best pair. Based on these best matched pairs, the second-phase GA can commence.