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CONCEPTUAL DESIGN OF THE SODIUM-COOLED FAST REACTOR KALIMER-600
한도희,김영일,이찬복,김성오,이재한,이용범,김병호,정해용 한국원자력학회 2007 Nuclear Engineering and Technology Vol.39 No.3
The Korea Atomic Energy Research Institute has developed an advanced fast reactor concept, KALIMER-600, which satisfies the Generation IV reactor design goals of sustainability, economics, safety, and proliferation resistance. The concept enables an efficient utilization of uranium resources and a reduction of the radioactive waste. The core design has been developed with a strong emphasis on proliferation resistance by adopting a single enrichment fuel without blanket assemblies. In addition, a passive residual heat removal system, shortened intermediate heat-transport system piping and seismic isolation have been realized in the reactor system design as enhancements to its safety and economics. The inherent safety characteristics of the KALIMER-600 design have been confirmed by a safety analysis of its bounding events. Research on important thermal-hydraulic phenomena and sensing technologies were performed to support the design study. The integrity of the reactor head against creep fatigue was confirmed using a CFD method, and a model for density-wave instability in a helicalcoiled steam generator was developed. Gas entrainment on an agitating pool surface was investigated and an experimental correlation on a critical entrainment condition was obtained. An experimental study on sodium-water reactions was also performed to validate the developed SELPSTA code, which predicts the data accurately. An acoustic leak detection method utilizing a neural network and signal processing units were developed and applied successfully for the detection of a signal up to a noise level of -20 dB. Waveguide sensor visualization technology is being developed to inspect the reactor internals and fuel subassemblies. These research and developmental efforts contribute significantly to enhance the safety, economics, and efficiency of the KALIMER-600 design concept.
청소년방과후아카데미 시설환경에 관한 관계자들의 의견조사 분석
한도희,김청송 한국청소년학회 2007 청소년학연구 Vol.14 No.4
The purpose of this research is to make effective Youth-After-School-Academy facilities through examination and analysis of staff's request about Youth-After-School-Academy facilities. According to social change, there are many juveniles left alone after school. Through various national support, a national project, YOUTH AFTER SCHOOL ACADEMY for these juveniles needed systematic and overall operating model to increase and operate the Youth-After-School-Academy which is run nationally by stages. The results of a survey and analysis about Youth-After-School-Academy facilities through staff are following. 1. The director's recognition of importance of facilities is following. the importance of facilities in class(4.68), suitable desks and chairs in size(4.59), the scale and size of a classroom(4.57), the importance of facilities for providing meals(4.56), LOUNGY(4.37), classroom cleanup(4.3) 2. The director's evaluation of Youth-After-School-Academy facilities is following. the importance of facilities in class(3.61), the level of classroom cleanup(3.48), suitable desks and chairs in size(3.41), facilities in class(3.22) 3. The evaluation about standards of director's office size in class, desks and chairs, tools and materials, facilities and office environment(5 items) and so forth is following. satisfaction with desks and chairs(3.53), satisfaction with facilities in office(3.27) 4. The results of the most urgent improvement's survey are following. the improvement of tools and materials which is about desks and chairs(3.47), the improvement of director's office(3.29), LOUNGY and BOOK CAFE(3.21) In this study, we proposed the items which are necessary when we improve and install the facilities of Youth-After-School-Academy 본 연구는 청소년방과후아카데미 관계자들의 시설에 관한 요구도 조사·분석을 통해 효율적인 청소년방과후아카데미 시설환경을 만들 수 있도록 연구하고자 하였다. 사회적인 변화에 따라 방과 후 나 홀로 방치되고 있는 청소년에 대한 다양한 지원을 통해 전인적 성장을 위해 국가정책적인 차원에서 시행되고 있는 청소년방과후아카데미 사업을 단계적으로 확대·실시하기 위해서는 시설환경에 있어서 체계적이고 종합적인 운영모델 개발과 발전방안 모색이 필요하게 되었다. 청소년방과후아카데미 시설환경에 대한 담당실무자를 통한 조사·분석 결과는 다음과 같다. 첫째, 시설의 중요성에 대한 지도자의 인식은 교실 내 기자재의 중요도(4.68), 책상과 걸상의 크기와 적절성(4.59), 교실규모와 크기(4.57), 급식실의 중요도(4.56), 휴게실(4.37), 교실의 환경미화(4.3) 순으로 나타났다. 둘째, 시설환경에 대한 지도자 평가는 교실내 기자재의 중요도(3.61), 교실환경미화 정도(3.48), 책상과 걸상의 크기와 적절성(3.41), 교실 내 기자재(3.22) 순으로 나타났다. 셋째, 지도자 사무실 규모, 책상과 의자, 기자재, 시설물, 사무실 환경(5개 항목) 등 수준에 대한 평가는 책상과 걸상에 대한 만족도(3.53), 사무실내 시설물에 대한 만족도(3.27) 순으로 나타났다. 넷째, 개선의 시급성 조사 결과는 책상과 걸상에 대한 기자재 개선(3.47), 지도자 사무실의 개선(3.29), 휴게실이나 북 카페(3.21) 순으로 시급하다고 평가되었다. 본 연구 결과를 통하여 청소년방과후아카데미 시설환경의 설치 및 개선시에 따른 필요한 사항을 제언하였다.
ADVANCED SFR DESIGN CONCEPTS AND R&D ACTIVITIES
한도희,장진욱,김영인,김영일,이찬복,김성오,이재한,하귀석,김병호,이용범 한국원자력학회 2009 Nuclear Engineering and Technology Vol.41 No.4
In order to meet the increasing demand for electricity, Korea has to rely on nuclear energy due to its poor natural resources. In order for nuclear energy to be expanded in its utilization, issues with uranium supply and waste management issues have to be addressed. Fast reactor system is one of the most promising options for electricity generation with its efficient utilization of uranium resources and reduction of radioactive waste, thus contributing to sustainable development. The Korea Atomic Energy Research Institute (KAERI) has been performing R&Ds on Sodium-cooled Fast Reactors (SFRs) under the national nuclear R&D program. Based on the experiences gained from the development of KALIMER conceptual designs of a pool-type U-TRU-10%Zr metal fuel loaded reactor, KAERI is currently developing Advanced SFR design concepts that can better meet the Generation IV technology goals. This also includes developing, Advanced SFR technologies necessary for its commercialization and basic key technologies, aiming at the conceptual design of an Advanced SFR by 2011. KAERI is making R&D efforts to develop advanced design concepts including a passive decay heat removal system and a supercritical CO2 Brayton cycle energy conversion system, as well as developing design methodologies, computational tools, and sodium technology. The long-term Advanced SFR development plan will be carried out toward the construction of an Advanced SFR demonstration plant by 2028.