Spacer Grid Effects during a Reflood in an Annulus Flow Channel
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概要
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An experimental study has been performed to investigate the effects of a spacer grid in an annulus flow channel with a uniform power shaped single rod during a bottom-reflood phase. The ranges of the experimental parameters are 2–8 cm/s for the flooding velocity, 20–80°C for the inlet subcooling temperature, and 500–700°C for the initial wall temperature. Two types of spacer grids, i.e., a swirl-vane type grid and a straight egg-crate type spacer grid, have been tested to compare the differences in their thermal hydraulic behavior through the spacer grids. Flow patterns and a rewetting front behavior near a spacer grid are remarkably altered with the types of spacer grids used. In the case of a low flooding rate and a high wall temperature condition, the cooling capacity of the swirl-vane spacer grid is better than that of the straight egg-crate type grid. Rewetting velocities through the swirl-vane spacer grids are faster than those through the other types of grids. The cladding temperature of the heater rod near a spacer grid shows a different pattern with the types of spacer grid used.
- 一般社団法人 日本原子力学会の論文
- 2007-07-25
著者
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CHO Seok
Korea Atomic Energy Research Institute
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KIM Yeon-Sik
Korea Atomic Energy Research Institute
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BAEK Won-Pil
Korea Atomic Energy Research Institute
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Chun Se-young
Korea Atomic Energy Research Institute
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Moon Sang-Ki
Korea Atomic Energy Research Institute
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Kim Yeon-sik
Korea Atomic Energy Res. Inst.
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