• 제목/요약/키워드: Nuclear development

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한국원자력 산업의 현황과 원자력 개발을 위한 주요 정책상의 문제점 (Current Status of Korean Nuclear Industry and Major Policy Issues for Nuclear Development)

  • Moon-Hyun Chun;Chang Hyun Chung
    • Nuclear Engineering and Technology
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    • 제17권3호
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    • pp.200-210
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    • 1985
  • 먼저, 우리나라의 원자력 개발현황에 대한 개요를 제시한 후, 우리나라의 경우 원자력 에너지가 왜 필요한가를 분명하게 설명하였다. 이러한, 주요 현황을 제시한 다음, 원자력 개발 상의 제약 요인과 한국원자력산업의 가장 취약한 분야 등의 우리나라 원자력 산업의 주요 문제점들을 파악하여 이 문제점들에 대하여 논의하였다. 끝으로 결론적으로는 우리나라에서 원자력 발전의 증가와 관련하여 정부와 원자력 산업이 각각 취해야 할 제반조치들을 제시하였다.

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Recent Activities relating on Nuclear Data

  • Tahara, Yoshihisa;Matsumoto, Hideki;Tani, Kazuhiro;Noda, Hideyuki
    • 한국원자력학회:학술대회논문집
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    • 한국원자력학회 2004년도 추계학술발표회 발표논문집
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    • pp.87-88
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    • 2004
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AN EXPERIMENTAL STUDY ON AN ELECTROCHEMICAL REDUCTION OF AN OXIDE MIXTURE IN THE ADVANCED SPENT-FUEL CONDITIONING PROCESS

  • Jeong, Sang-Mun;Park, Byung-Heung;Hur, Jin-Mok;Seo, Chung-Seok;Lee, Han-Soo;Song, Kee-Chan
    • Nuclear Engineering and Technology
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    • 제42권2호
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    • pp.183-192
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    • 2010
  • An electrochemical reduction of a mixture of metal oxides was conducted in a LiCl molten salt containing 3 wt% $Li_2O$ at $650^{\circ}C$. The oxide reduction was carried out by applying a current to an electrolysis cell, and the $Li_2O$ concentration was analyzed during each run. The concentration of $Li_2O$ in the electrolyte bulk phase gradually decreases according to Faraday's law due to a slow diffusion of the $O^{2-}$ ions. A hindrance effect of the unreduced metal oxides was observed for the reduction of the uranium oxide. Cs, Sr, and Ba of high heat-load fission products were diffused into and accumulated in the salt phase as predicted with thermodynamic consideration.

PROSPECTIVE ON DEVELOPMENT OF NUCLEAR POWER AND THE ASSOCIATED FUEL CYCLE IN CHINA

  • Gu Zhongmao;Liu Changxin;Fu Manchang
    • 한국방사성폐기물학회:학술대회논문집
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    • 한국방사성폐기물학회 2005년도 Proceedings of The 6th korea-china joint workshop on nuclear waste management
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    • pp.156-164
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    • 2005
  • The challenges China is facing in energy security are briefly discussed. Then, the development of nuclear power in China in the first half of 21 st century is envisioned, and it is expected that Generation-3 PWR nuclear power plants (NPPs) would be the leading units of nuclear power in the coming $30\~40$ years. As part of the nuclear power program, the R&D work on nuclear fuel cycle is generally proposed.

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핵이식에 의한 소 난자 및 초기배의 핵-세포질의 상호작용에 관한 연구 (Nucleo-cytoplasmic Interactions of Bovine Oocytes and Embryos Following Nuclear Transplantation)

  • 김정익;양부근;정희태
    • 한국가축번식학회지
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    • 제17권4호
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    • pp.287-294
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    • 1994
  • This study was to investigate the effects of electrofusion, activation and developmental stage of donor embryos on in vitro development of nuclear transplant bovine embryos. A single blastomere nucleus from 8-cell to morula stage embryos produced by in vitro fertilization(IVF) was transferred into a recipient oocyte enucleated at 23∼25 h after in vitro maturation(IVM) or into a recipient oocyte enucleated and cultured for 14∼15 h. In one experiment the nuclear transplant embryos were subjected to additional activation treatments. Fusion rate of nuclear transplant eggs was high at direct current(D.C) voltages of 1.0 and 1.5 kV/cm 991.5 and 93.3%, respectively), but decreased at 2.0kV/cm (81.8%). Additional activation treatments by electric pulases or 7% ethanol did not affect the cleavage and development of nuclear transplant embryos. Development of nuclear transplant embryos slightly increased by delayed nuclear transfer and fusion (42∼43 h after IVM). With this system, blastocysts were obtained from transfer of 8-cell to morula stage donor nuclei (9.6%∼2.4%). The result of this study suggests that nucleo-cytoplasmic interactins, expecially activation of ooplast are very important for the development of nuclear transplant embryos, and donor cell stage does not affect the development of nuclear transplant embryos.

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DEVELOPMENT AND VALIDATION OF A NUCLEAR FUEL CYCLE ANALYSIS TOOL: A FUTURE CODE

  • Kim, S.K.;Ko, W.I.;Lee, Yoon Hee
    • Nuclear Engineering and Technology
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    • 제45권5호
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    • pp.665-674
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    • 2013
  • This paper presents the development and validation methods of the FUTURE (FUel cycle analysis Tool for nUcleaR Energy) code, which was developed for a dynamic material flow evaluation and economic analysis of the nuclear fuel cycle. This code enables an evaluation of a nuclear material flow and its economy for diverse nuclear fuel cycles based on a predictable scenario. The most notable virtue of this FUTURE code, which was developed using C# and MICROSOFT SQL DBMS, is that a program user can design a nuclear fuel cycle process easily using a standard process on the canvas screen through a drag-and-drop method. From the user's point of view, this code is very easy to use thanks to its high flexibility. In addition, the new code also enables the maintenance of data integrity by constructing a database environment of the results of the nuclear fuel cycle analyses.

INSTRUMENTATION AND CONTROL STRATEGIES FOR AN INTEGRAL PRESSURIZED WATER REACTOR

  • UPADHYAYA, BELLE R.;LISH, MATTHEW R.;HINES, J. WESLEY;TARVER, RYAN A.
    • Nuclear Engineering and Technology
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    • 제47권2호
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    • pp.148-156
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    • 2015
  • Several vendors have recently been actively pursuing the development of integral pressurized water reactors (iPWRs) that range in power levels from small to large reactors. Integral reactors have the features of minimum vessel penetrations, passive heat removal after reactor shutdown, and modular construction that allow fast plant integration and a secure fuel cycle. The features of an integral reactor limit the options for placing control and safety system instruments. The development of instrumentation and control (I&C) strategies for a large 1,000 MWe iPWR is described. Reactor system modeling-which includes reactor core dynamics, primary heat exchanger, and the steam flashing drum-is an important part of I&C development and validation, and thereby consolidates the overall implementation for a large iPWR. The results of simulation models, control development, and instrumentation features illustrate the systematic approach that is applicable to integral light water reactors.