• Nuclear Engineering and Technology
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• 제50권7호
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• pp.1190-1197
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• 2018

Analysis of the GRSW-A model coupled into the FALCON code is extended by simulation of central void formation in fuel pellets due to high-temperature fuel restructuring. The extended calculation is verified against published, well-known experimental data. Good agreement with the data for a central void diameter in pellets of the rod irradiated in an Experimental Breeder Reactor is shown. The new calculation methodology is employed in comparative analysis of modern BWR fuel behavior under assumed high-power operation. The initial fuel porosity is shown to have a major effect on the predicted central void diameter during the operation in question. Discernible effects of a central void on peak fuel temperature and Pellet-Cladding Mechanical Interaction (PCMI) during a simulated power ramp are shown. A mitigating effect on PCMI is largely attributed to the additional free volume in the pellets into which the fuel can creep due to internal compressive stresses during a power ramp.

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• 제5B권4호
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• pp.399-404
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• 2005

In this paper, a hybrid photovoltaic fuel-cell generation system employing an electrolyzer for hydrogen generation and battery for storage purpose is designed and simulated. The system is applicable for remote areas or isolated DC loads. Control strategy has been considered to achieve permanent power supply to the load via the photovoltaic/battery or the fuel cell based on the power available from the sun. MATLAB and SIMULINK have been used for the simulation work. A sensitivity analysis is conducted for various load level based on availability of solar radiation.

• 오토저널
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• 제9권1호
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• pp.57-68
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• 1987

The driving pattern was studied in Seoul along nineteen representative routes using a test car equipped with all the instruments required for recording traffic flow and measuring fuel consumption. Speed histories, gear shift points, instantaneous fuel consumption rates, etc. were recorded and the data were anlyzed to determine the traffic characteristics for Seoul. The Seoul-14 Mode has been developed to simulated actual driving conditions in Seoul with respect to fuel consumption. The average speed of the Seoul-14 Mode is 30.1 Km/h and the Mode length is 11.94 Km.

• 자원리싸이클링
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• 제11권4호
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• pp.3-10
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• 2002

핵연료 원료인 $UO_2$ 분말을 사용해 원자로에서 연소된 사용후 핵연료 소결체를 모의 제조하여 1회 산화ㆍ환원처리하여 분말로 만든 후, 건ㆍ습식 attrition 분쇄에 따른 분말의 특성 및 소결성을 조사하였다. 분쇄에 의한 분말의 평균입자크기는 건식분쇄의 경우에는 1 $mu extrm{m}$ 이하인 미분말이 쉽게 생성되었으나, 습식분쇄에서는 그 이상의 분말만이 생성되었다. 그리고 분쇄분말의 비표면적은 건식분쇄한 경우가 습식분쇄한 경우 보다 높았다. 분말의 미세구조는 건식분쇄에 의해서는 느슨한 응집체가 형성되었으며, 습식분쇄 분말은 압분성이 낮은 불규칙적이고 각진 입자형태를 나타내었다. 건식분쇄에 의해서 압분체 밀도는 크게 증가하며 소결체 요구 조건을 만족하는 이론밀도의 95%이상이 되고 평균 결정립 크기가 8 $\mu\textrm{m}$이상인 소결체를 얻을 수 있었다.

• 한국재료학회:학술대회논문집
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• 한국재료학회 1999년도 추계학술발표강연 및 논문개요집
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• pp.39-39
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• 1999

• 한국재료학회:학술대회논문집
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• 한국재료학회 1999년도 추계학술발표강연 및 논문개요집
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• pp.24-24
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• 1999

• 한국재료학회:학술대회논문집
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• 한국재료학회 1999년도 춘계학술발표강연 및 눈문개요집
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• pp.55-55
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• 1999

• 한국재료학회:학술대회논문집
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• 한국재료학회 2000년도 추계학술발표강연 및 논문개요집
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• pp.68-68
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• 2000

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1999년도 추계학술발표회요약집
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• pp.292.2-292
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• 1999

• 전기학회논문지P
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• 제58권4호
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• pp.609-614
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• 2009

A fuel-cell power system among various alternative power sources has many advantages such as comparatively independable circumstances, high-efficient, and heat-recyclable, thus it is now able to be up to hundreds MWh-scaled through improving feasibility and longevity of it. During the last few decades, numerous research results has been investigated to expand interest in fuel-cell technology. This study presents pressure distribution on the geometrical manifold structures, which are U-type and Z-type, of a planar-type fuel-cell stack by simulated with computational fluid dynamics(CFD). Then, electrical performance of a 200W fuel-cell stack, which is U-type, was diagnosed after pre-conditioning operation. The stack has electrical characteristics ; 22V, 10A, 220W, and current density $200mA/cm^2$.