• Proceedings of the Korea Concrete Institute Conference
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• 2006.11a
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• pp.237-240
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• 2006

Almost 30 years have been passed since the first nuclear power plant was operated in Korea. Many studies have been actively conducted from the early 1990's in order to develop the deterioration management system for concrete structures in NPPs(Nuclear Power Plants) accordingly. Base on these studies, a systematic deterioration management program has developed and operated since 1997. According to this program, systematic inspections to provide database and evaluation were periodically performed (every overhaul at intervals of $12{\sim}18$ month and every five years). Accumulated deterioration database was usefully utilized for the NPP PSR (Periodic Safety Review). In this paper, the long-term durability and integrity of Kori 1,2 NPP concrete structures which are the oldest ones in Korea were evaluated based on the precise inspection database and regulatory inspection results including compressive strength, depth of carbonation, amount of chlorination and spontaneous potential of reinforcing bar, etc. It was noted that Kori 1,2 NPP structures have not any serious durability problems.

• Journal of Electrical Engineering and Technology
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• v.13 no.4
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• pp.1631-1637
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• 2018

Electric utilities has been considered the necessity to introduce asset management of electric power facilities in order to reduce maintenance cost of existing facilities and to maximize profit. This paper aims to provide data that can helpful to make profitable decision in terms of power transformers which have a significant part in the power system. Therefore, this study is modeling input cost for power transformer during its entire life and also the life cycle cost (LCC) technique is applied. In particular, the variation of transformer state related with maintenance and the variation of the EUAC curve based on cost and effect of maintenance is examined. In this study, the trend of the equivalent uniform annual cost (EUAC) according to maintenance cycle and cost of equipment is analyzed. In line with that, sensitivity analysis influenced by the changes of other cost factors was performed.

• Strategy21
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• s.44
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• pp.54-78
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• 2018

The core of the current constitutional amendment pursued by the Abe administration depends on the status of the Japanese Self-Defense Forces, which include the right to engage in war, in the legal and regular military positions. This is an important turning point for the Abe administration, which aims to become a normal country for Japan, and it is a series of steps that followed in the revision of the U.S. and Japan guidelines in 2015 and the overhaul of the security law in 2016. In this paper, we propose building "A navy Attractive to Alliances" as a way to secure Korea's maritime security under the current security environment. The term "attraction" refers to the alliance "first priority" especially in the United States. The way to do this is to transform the paradigm of the ROK-U.S. alliance into a naval hub in the vast seas, which will allow us to strengthen our national defense and even deter threats from neighboring countries. To this end, our navy needs to have a more active approach to U.S. East Asian strategy. If we can convince the United States to be a nation that contributes more to its East Asian strategy, it will only lead to a strengthening of the status of its alliance and expansion of its unilateral support and military capability against Japan, thus minimizing Japan's influence.

• Journal of the Korea Furniture Society
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• v.28 no.2
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• pp.118-125
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• 2017

This study aims to report on the problems of the Korean woodcraft in the past and to suggest a new direction for the development strategy, in line with the government policy to promote domestic craft culture industry. This includes the problems of the woodcraft in Korea which have been raising in contest-exhibits organized not only by industry and academia, but also by government. The survey asked 48 people (24 in industry and 24 in academia) shows as follows. The most serious problem shown in industry is the government-sponsored issue and it should be premised on offering the market in this case. The question in academia reports that the academic world little contributes to the development in industrial circles of the woodcraft, and the problematic issues of the contests are the appraisal standard and the method of evaluation. In brief, the government's aggressive support should be always first and foremost for the woodcraft industry which is often confronted with difficulties in research & development and in securing distribution channels due to it' small scale of business. Furthermore, the government-led contest and certificate of qualifications should be redesign for filling the original purpose and throughly carried out for the development of industries. Also university curriculum being far too disconnected from industries now should be focused on the collaboration between industry and university, the training mission and the related seminars to overhaul the contents of the department of the woodcraft and to create a progressive direction for the future accordingly.

• The Korean Journal of Archival Studies
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• no.65
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• pp.47-88
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• 2020

Moon Jae-in as the government was launching new records & Archives management innovation is promoted. It was necessary to overhaul the Presidential Records & Archives Act and resolve the issues so far. The key issues include the establishment of individual presidential archives and the guarantee of access to former presidents. The current administration of presidential records is being carried out in the position of a manager (agency). The system's biggest "customers" are discussing management difficulties, even though they are former presidents. Record management should be a customer-centered information service. The "core customer" of managing presidential records is the former president. Another important problem is to separate the Presidential Archives from the National Archives to strengthen its status.

• Cross-Cultural Studies
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• v.27
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• pp.123-143
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• 2012

China's Yueyanglou(岳陽樓) cultural landscape and cultural landscape of Korea, respectively Yueyanglou(岳陽樓) investigated and the following results were extracted. First, multi-cultural personalities to ever Yueyanglou(岳陽樓) China's outstanding natural beauty around the emotion of his drawing on the literature and a new cultural landscape was formed. Their main feeling of the beauty of nature through his ash under adverse conditions up again in politics, which expresses the desire to advance. To this end, his outlook on life and also an attitude overhaul yeotboinda. This information formed the cultural landscape of Korea Yueyanglou(岳陽樓) not deviate from that has been investigated. Second, Korea is entirely China's 'sun' Lou Yueyanglou(岳陽樓) was a significant effect of cultural landscape. The beautiful landscapes of the Joseon Dynasty literati in the Joseon reported only in words and pictures they admired China's leading natural and cultural landscape and paste the name of the famous' sun Lou watch it was transformed into a cultural landscape. For this reason, the current remaining two 'sun' Lou, but probably the Joseon Dynasty, called the 'sun tower base and is estimated to be more common than now. In addition, in Hadong Yueyanglou(岳陽樓) near the sun 'Lou, China has also attached near the nomination could be an important clue.

• Journal of the Korean Society of Propulsion Engineers
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• v.22 no.4
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• pp.117-124
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• 2018

USA and Europe are leading the transport airplane industry. In Asia-Pacific region, air transportation and MRO industries are forecasted to be grown up rapidly. Furthermore, Japan and China entered into design and manufacture state of regional airplane, while developing countries entered into severe struggle competition for MRO industry. Global aircraft MRO and engine MRO industries are forecasted 3.4% and 7% annual growth respectively in the next decade. In this paper, authors propose promotion strategy for technology intensive MRO of aircraft engine to create a higher value-added business.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.14 no.2
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• pp.49-58
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• 2018

The regulatory periodic inspection program (PSI) conducted at every overhaul period is the most important process for confirming the safety of nuclear power plants. The PSI for operating nuclear power plants in Korea mainly consist of component level performance check that had been developed based on deterministic approach putting the same degree of importance to all the inspection items. This inspection methodology is likely to be effective for preoperational inspection. However, once the plant is put into service, the PSI must be focused on whether to minimize the risk of accident using defense-in-depth concept and risk insight. The incorporation of defense-in-depth concept and risk insight into the deterministic based safety inspection has not been well studied so far. In this study, two track approaches are proposed to make sure that core damage be avoided: one is to secure success path and the other to block the failure path in a specific event tree of PSA. The investigation shows how to select safety important components and how to set up inspection group to ensure that core damage would not occur for a given initiating event, which results in strengthening defense-in-depth level 3.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.16 no.2
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• pp.18-24
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• 2020

When a damage occurs in the nuclear fuel burning in the reactor, fission products that should be in the nuclear fuel rod are released into the reactor coolant. In this case, sipping test, a series of non-destructive inspection methods, are used to find leakage in nuclear fuel assemblies during the power plant overhaul period. In addition, the sipping test is also used to check the integrity of the spent fuel for moving to an intermediate dry storage, which is carried out as the first step of nuclear decommissioning, . In this paper, the principle and characteristics of the sipping test are described. The structure of the sipping inspection equipment is largely divided into a suction device that collects fissile material emitted from a damaged assembly and an analysis device that analyzes their nuclides. In order to make good use of the sipping technology, the radioactive level behavior of the primary system coolant and major damage mechanisms in the event of nuclear fuel damage are also introduced. This will be a reference for selecting an appropriate sipping method when dismantling a nuclear power plant in the future.

• Journal of the Korean Society of Safety
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• v.36 no.2
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• pp.1-9
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• 2021

The 8200-unit electric locomotive, which is a high-efficiency multipurpose electric locomotive, is a German model, namely BR152 series ES64F, and it is manufactured to suit the operating conditions in Korea. Since 2003, 83 locomotives have been introduced in Korea, and they have been operating in the general railway sector for both passenger and freight transport. Although more than 15 years have passed since their first introduction, owing to the characteristics of vehicles introduced overseas, responding promptly to failures has been difficult owing to problems related to factors such as transfer of technology and procurement of parts for maintenance. Furthermore, there have been difficulties in operating the locomotives on the basis of the manufacturer-recommended time-between-overhaul (TBO) cycle. Therefore, a new TBO should be determined. To support the development of a reliability-based maintenance system, this study conducted a reliability and TBO analysis by using failure data obtained from KOVIS, and future management measures are presented.