• Proceedings of the Korean Radioactive Waste Society Conference
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• 2011.05a
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• pp.69-70
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• 2011

본 논문은 사용후핵연료의 장기저장으로 인하여 발생할 처분지연에 대한 경제적 효과를 분석하였다. 분석 결과, 사용후핵연료 장기저장을 통하여 고준위방사성폐기물의 지하처분장 건설을 190년 지연시킬 경우, 2040년에 처분장을 건설할 경우와 비교하여 약 1/3의 비용이 소요되는 것으로 계산되었다. 이러한 결과는 경수로핵연료 2만톤과 CAMDU 1만6천톤을 처분하는 것을 가정하여 순전히 경제적인 관점에서 산출된 결과이다.

• Proceedings of the Korean System Dynamics Society
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• 2006.04a
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• pp.123-149
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• 2006

본 연구는 방사성폐기물 처분시설(radioactive waste repository)의 입지를 가정하여, 처분시설이 경상북도 경주시에 발생시키는 경제적, 사회적 효과를 분석하는데 목적이 있다. 정부는 처분장 유치의 유인책(incentives)으로서 경주 지역주민들을 위하여 다양한 정책적 수단을 마련하였다. 처분시설 입지에 따른 특별지원금 3,000 억원 지원, 수거물 반입 수수료 지원(년당 50-100억원), 한국수력원자력(주) 본사이전, 양성자가속기 사업 추진 등이 그것이다. 이들 지원사업들이 가져오는 변화를 시스템 다이내믹스(System Dynamics) 기법을 적용하여 지역사회의 인구, 산업, 토지, SOC, 지방재정 등이 어떻게 변화하는지 추적해 봄으로써 도시체제의 동태성(urban system dynamics)을 이해하고 처분장 시설이 지역에 입지했을때, 미래에 발생 가능한 문제점이 없는지 밝혀내고자한다. 이를 위하여 시뮬레이션 모델링에 입지 지역의 특성과 현황을 반영하여 처분장입지에 따른 지역의 동태적인 변화과정과 경향을 추정해 보고, 현재 예정되어 있는 지원사업이 충분한지, 이외에 다른 정책적 지원이 필요한지를 알아본다. 본 연구의 의미는 이처럼 경주지역 주민들이 처분장의 지역입지를 만족스럽게 행각하고 소외감 없이 생활을 영위할 수 있도록 정책적 지원 프로그램을 작성하는데 기초가 되는 연구라는 점에 있다고 하겠다.

• Nuclear industry
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• no.5_6 s.7
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• pp.45-47
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• 1982

원자력평화이용의 마지막 큰 과제라 할 수 있는 고레벨방사성폐기물의 처리${\cdot}$처분에 관해 고레벨폐기물 glass 고화체의 화학적내구성(침출율, 고온수화반응 등), 조사효과, 장기저장시설의 냉각특성, 지층처분에서의 포장성(암석특성이나 투수성) 등 많은 연구가 행해지고 있는데, 여기서는 장기저장시설과 처분시설의 시스템개념에 관한 것을 알아 보기로 한다.

• The Journal of the Korea Contents Association
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• v.18 no.7
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• pp.49-63
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• 2018

This study examines both the announcement effect of corporate real estate acquisitions and sales and long-term stock performance. Also, we analyze long-term stock returns on the basis of the amount and the purpose (business activities, financial activities, etc.) of real estate acquisitions and sales. The major findings are as follow. First, we find that there is no significant announcement effect on the real estate acquisitions. However, the announcement day of real estate sales shows significantly positive abnormal stock returns. Second, we find that both the real estate acquisitions and sales show negative long-term stock performance. We also find the same results from the case where we classify our sample on the basis of the amount and the purpose of real estate acquisitions and sales. Third, the amount of real estate acquisitions is significantly negatively related to long-term stock returns, whereas the relation between firm value and the amount of real estate sales is positive only under the business activities. Overall, long-term stock performance decreases after the announcement day of the real estate acquisitions and sales. This results can be explained by agency theory. Also, we conclude that a decline in stock performance after the real estate sales explain an information signal on financial distress.

• Korea Real Estate Review
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• v.27 no.1
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• pp.7-16
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• 2017

In this study, we examine whether there are prospect theory investment patterns for individual investors in the real estate market. We use the maximum potential profit rate and the maximum potential loss rate of individual investors as a research method and additionally analyze it using the Jeong and Park(2015) model. As a result of the analysis, it was found that the investment pattern according to the prospect theory and disposition effect for individual investors. And we find the difference between zoning areas. This difference in investment behavior is believed to be due to the purpose of the real estate and the existence of rent fee, which creates a difference in investment behavior depending on the purpose. The limitations of this study are the analysis measurement of potential profit and potential loss using the land price index like the study of jeong and Park(2015). This implies that a new property price index needs to be developed or a benchmark for real estate assets is needed for deeper study of real estate investment sentiment.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.14 no.4
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• pp.305-320
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• 2016

The metal waste generated during nuclear power plant decommissioning constitutes a large proportion of the total radioactive waste. This study investigates the current status of domestic and international regulatory requirements for clearance and the clearance experience of domestic institutions. The RESRAD-RECYCLE code was used for analyzing the clearance of the metal wastes generated during actual nuclear power plant decommissioning, and assessment of the exposure dose of twenty-six scenarios was carried out. The evaluation results will be useful in preliminary analysis of clearance and recycling during nuclear power plant decommissioning. As a next step, the effects of reducing disposal costs by clearance can be studied.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.3 no.3
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• pp.183-192
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• 2005

Natural ventilation in radioactive waste repositories is considered to be less efficient than mechanically forced ventilation for the repository working environment and hygiene & safety of the public at large, for example, controlling the exposure of airborne radioactive particulate matter. It is, however, considered to play an important role and may be fairly efficient for maintaining environmental conditions of the repository over the duration of its lifetime, for example, moisture content and radon (Rn) gas elimination in repository. This paper describes the feasibility of using natural ventilation which can be generated in the repository itself, depending on the conditions of the natural environment during the periods of repository construction and operation. Evidences from natural cave analogues, actual measurements of natural ventilation pressures in mountain traffic tunnels with vertical shafts, and calculations of airflow rates with given natural ventilation pressures indicate possible benefits from passive ventilation for the prospective Korean radioactive waste repository. Natural ventilation may provide engineers with a cost-efficient method for heat and moisture transfer, and radon (Rn) gas elimination in a radioactive waste repository. The overall thermal performance of the repository may be improved. The dry-out period may be extended, and the seepage flux likely would be decreased.

• KOREAN POULTRY JOURNAL
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• v.34 no.8 s.394
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• pp.88-92
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• 2002

닭질병에 대한 공포가 점차 확산되고 있는 가운데 양계업은 생산기반이 무너져 내리고 있다. 종계에서 뉴캣슬병, 가금인플루엔자 피해가 커지고 있고, 산란계, 육계에서 뉴캣슬병과 가금티푸스가 가장 큰 문제로 대두되고 있지만, 정부가 펼치는 방역대책 효과에 대해서는 의구심마저 갖게 하고 있다. 각 계종별 공통된 질병에 의한 피해가 심하여 업을 포기하고 싶어도 포기하지 못하는 상태에 이르고 있다. 하지만 정부에서는 뉴캣슬병, 가금티푸스, 가금인플루엔자와 같은 질병을 차단하기 위하여 뉴캣슬병과 가금티푸스에 대한 백신정책에만 의존할 것인지, 살처분 보상 제도 도입을 계획하고 있는지 살펴보고, 양계업계에서는 앞서 지적한 닭 질병에 대한 살처분 보상제도에 대하여 어떤 의견이 있는지 점검해 보았다.

• The Korean Journal of Financial Management
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• v.22 no.1
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• pp.37-69
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• 2005

This study intends to verify whether stock repurchase, as well as stock dispositions, affects shareholder's wealth and also whether repurchase/dispositions has varying impact de-pending on its purpose. According to empirical analysis, announcement of stock repurchase results in positive abnormal returns when the objective of stock repurchase is stock price stabilization or cancellation of shares. However, when the purpose of stock repurchase is granting incentives to executives/employees, we get the negative abnormal returns. Also, the termination of stock trust for reason of expiration or stock dispositions of which goal is to give incentives to executive/employees has a negative impact on stock price, whereas direct dispositions of stock to raise cash or to improve financial structrue are shown to significantly increase the wealth of shareholders. Cross-section analysis also confirms that stock repurchase and dispositions has different impact on excess returns depending on its purpose. The results of this study imply that the dispositions of stock should be regarded as an important financial strategic tool to be used by companies and what's more, such studies dealing with stock repurchase or dispositions should take firm's purpose into consideration in their approach.

• KDI Journal of Economic Policy
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• v.36 no.4
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• pp.33-69
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• 2014

We investigate determinants of fund investment flows using Korean equity investment funds. Unlike previous studies which analyzed net-flows (inflow minus outflow), we analyze fund investment inflows and outflows separately that should properly reflect investors' fund selection and redemption decision. We find similar effects of past return, fund age on net-flows to existing studies based on US market data. The analysis of determinants of inflows shows that inflows are related to past return, fund age and sales fee as net-flows. In contrast, outflows are found to behave quite differently from inflows. Apparently, asymmetry exists between fund investment inflows and outflows at the Korean fund selection market. Specifically, high past returns increase fund investment inflows while increase, rather than decrease, fund outflows. Moreover, 'convexity' is detected both in inflows and outflows: higher past returns accelerate outflows as well as inflows. Effects of sales fee also differ between inflows and outflows. In the 'affiliated' fund sample, sales fee is negatively related to inflows while positively related to outflows. In the 'unaffiliated' fund sample, sales fee is positively related to inflows, but no significant relationship exists with outflows. Empirical findings of this paper imply that the rational investor's fund selection view cannot provide a consistent explanation of the Korean fund selection market. In particular, the positive and convex relationship between past returns and fund outflows is inconsistent with the rational investor view. The fact that investor's fund investment appears to display 'disposition effect', which has been reported by studies of individual investors' stock investment behaviour suggests that the behavioral finance view should be a part of explanation for the Korean fund selection market. In addition, the strikingly different patterns between the 'affiliated' funds and the 'unaffiliated' funds, imply that brokers' incentive structure is another prevailing factor for fund investment flows.