• Title/Summary/Keyword: 핵에너지

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한반도 핵불안과 방위산업 기술개발

  • Sin, Seong-Taek
    • Defense and Technology
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    • no.5 s.171
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    • pp.14-17
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    • 1993
  • 핵 산업은 핵에너지의 군사적 이용 측면이며, 원자력산업은 핵 에너지의 평화적이용을 뜻합니다. 원자력 산업을 우리가 핵무기가 연관시켜 생각하는 것은 잘못된 것입니다 국제적인 상황은 언젠가는 변하는 것이므로, 상황이 바뀌어 새로운 여건하에서도 이용될수 있도록 적어도 원자력산업의 연구개발에는 지금이라도 적극적으로 투자하여, 기술능력만큼은 보유해야 할 것입니다

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International Comparison of Nuclear Energy Conflict in Europe and Northeast Asia from the Viewpoint of New Social Movement: With an Emphasis on the Risk Communication (신 사회운동의 과점에서 본 유럽과 동북아시아의 핵에너지 갈등의 국제적 비교: 모험 커뮤니케이션을 중심으로)

  • Kim, Seong-Jae
    • Korean journal of communication and information
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    • v.25
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    • pp.7-40
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    • 2004
  • Today, nuclear energy conflict is caused from the dangerous radioactive material. The main party of this conflict are politic and economic systems which deride nuclear energy, and the persons concerned which it oppose and the anti-nuclear environment group. If the nuclear waste is transported from one nation to another nation, multi national anti-nuclear group appears as conflict party. We call this domestic and transnational risk communication new social movement. From the viewpoint of system theory, the new social movement can mean the offensive development of self-reference which withstand the "technicalization of communication" through the "symbolically generalized communication media" like money and power. By comparing Northeast Asia and Europe, the nuclear energy conflict did not show a big difference in the selection of nuclear waste storing site. In the Northeast Asia, when Taiwan exports the nuclear waste to North Korea, the international conflict broke out. In Europe, Germany has a hard experience with the construction-plan for the re-treating plant that produces the plutonium from the dangerous nuclear waste, and with the transnational transport of the nuclear waste. The new social movement aims the global paradigm which is able to guarantee the subtainability of ecological environment. The nuclear conflict in the "world risk society" is solved through the "discourse-alliance" which accomplishes sub-politics by crossing the border of class, nation and system.

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A Theoretical Study of GaAs Nucleation in GaAs/Si Heteroepitaxy Structure (GaAs/Si Heteroepitaxy 구조에서 GaAs의 초기 핵생성에 관한 이론적 고찰)

  • 최덕균
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.1 no.1
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    • pp.51-59
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    • 1991
  • Early stage of GaAs nucleation on Si substrate was theoretically studied by computer simulation. Compared to the constant ledge interaction energy in conventional nucleation theory, functional behavior of ledge-ledge interaction resulted in small size clusters depending on the cluster size and shape. Among various kinds of clusters, the multilayer pyramidal shape GaAs cluster requires smallest excess free energy due to the formation of Ga(111) facet planes. There this result suggests that the defects involved in GaAs/Si are originated from the early stage nucleation.

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Nuclear Energy Depositions in the Primary End Shields and Side Primary Shield Systems (월성 2호기 종단 및 측면 차폐체에의 핵에너지축적 해석)

  • Kim, Kyo-Youn;Kim, Jong-Kyung
    • Journal of Radiation Protection and Research
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    • v.17 no.2
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    • pp.37-48
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    • 1992
  • It was carried out to analyze the nuclear energy deposition rates for the bulk shield components including materials of the primary end shield and side primary systems of Wolsong 2 during steady state operations at 100% full power using ANISN code. This paper has been prepared to support system design of Wolsong 2.

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Effects on the Gamma Rays Scattered Backward by the Gold Cylinder on the Nuclear Energy Level (실린더 금속판에 의해 뒤쪽산란된 감마선이 핵에너지 준위에 미치는 효과)

  • Jeong, M.T.;Chol, N.G.;Cheoun, M.K.
    • Journal of the Korean Magnetics Society
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    • v.17 no.2
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    • pp.103-107
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    • 2007
  • When the gamma-ray source, $^{133}Cs$, embedded in a solid is placed at the center of a gold cylinder, the width of 81 keV level is shown to become narrower. This result implies a prolongation of the lifetime of that energy level. With a 0.5-mm-thick, 5-cm-long, 2-mm-diameter platinum cylinder, we obtain a width narrower by 6.1 % at 4.2 K.

The Possible Modification of the Half Life of the $^{133}Cs$ nucleus in the Finite Space (유한한 공간에서 $^{133}Cs$ 원자핵 반감기의 변화에 대한 연구)

  • Jeong, Moon-Taeg;Dong, Kyung-Rae
    • Journal of radiological science and technology
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    • v.32 no.2
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    • pp.213-218
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    • 2009
  • A theoretical investigation has been carried out on how the energy width of the excited state of the nuclei is modulated when the $\gamma$-ray source is placed between two gold plates, at the center of the gold cylinder or the sphere. The width of the 81-keV level of $^{133}Cs$ is shown to become narrower by 3.7% at 4.2 K by reabsorption of $\gamma$ rays scattered backward from the parallel plates which are made of a 0.05-cm-thick, 3-cm-radius gold plates and separated from each other by 1.0 mm. With a 0.05-cm-thick, 5-cm-long, 1.0-mm-radius gold cylinder, we found that a width became narrower by 6.5%. In addition, when the nuclei is located in a spherical reflector of 1.0 mm in radius made of gold with a thickness of 0.5 mm. the level width is reduced by about 18.2% at a temperature 4.2 K. The results of this study indicates that the life-time of energy level was prolonged.

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A Visual on Study on Nucleate Boiling Phenomena in a Closed Two-Phase Thermosyphon (밀폐형 2상 열사이폰내의 비등현상에 관한 가시화 연구)

  • 김철주;강환국;오광헌
    • Journal of Energy Engineering
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    • v.4 no.2
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    • pp.261-269
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    • 1995
  • 본 연구에서는 밀폐형 2상 열사이폰의 액체 Pool에서 발생하는 핵비등현상과 유동영역에 대해 가시화 방법으로 연구하였다. 실험용 열사이폰은 스텐레스와 유리관을 이용하여 제작하였으며, 열공급은 증발부 주위에 설치된 유도 가열용 코일에 고주파를 가함으로써 스텐레스 외면에 발열이 일어나도록 하였다. 이에 따른 결과는 다음과 같다. 실험용 열사이폰은 고주파 가열등 열사이폰의 작동성능을 저해하는 여러 요인들이 포함되어 있었으나, 실험결과 이러한 문제는 실험 내용에 영향을 미칠만큼 크게 나타나지 않았다. 열속과 상당압력의 범위는 각각2$m^2$, 0.1

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