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CFD Modeling and Experiment Validation of Flow Characteristic in a Structured Pebble Bed

[+] Author Affiliations
ZhongChun Li

Tsinghua University, Beijing, ChinaNuclear Power Institute of China, Chengdu, China

Jian Li, XiaoMing Song, JianChao Lu

Nuclear Power Institute of China, Chengdu, China

Paper No. ICONE20-POWER2012-54163, pp. 403-410; 8 pages
doi:10.1115/ICONE20-POWER2012-54163
From:
  • 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference
  • Volume 4: Codes, Standards, Licensing, and Regulatory Issues; Fuel Cycle, Radioactive Waste Management and Decommissioning; Computational Fluid Dynamics (CFD) and Coupled Codes; Instrumentation and Controls; Fuels and Combustion, Materials Handling, Emissions; Advanced Energy Systems and Renewables (Wind, Solar, Geothermal); Performance Testing and Performance Test Codes
  • Anaheim, California, USA, July 30–August 3, 2012
  • Conference Sponsors: Nuclear Engineering Division, Power Division
  • ISBN: 978-0-7918-4498-4
  • Copyright © 2012 by ASME

abstract

Spherical fuel assembly with light water reactor technology has prominent advantages on safety and fuel cycle, for its large specific surface. However, larger specific surface brings larger pressure drop over the core comparing with traditional rod fuel assembly. A test facility was built to investigate the flow characteristics on a mono-size sphere packed bed with a diameter of 3mm. The Reynolds number varies from 52 to 665, and the flow pattern ranges from Darcy flow to turbulent flow. Pressure drop of the whole test part was measured with relevant components to ensure the expected inlet conditions. Results of tests with different inlet flow rates and temperatures were obtained. Numerical simulations were taken on the same packed structure and defined problem using CFD method. Quite good agreement was reached on pressure drop over the test part, and detailed flow information was also obtained. Furthermore, the scaling effects, including longitude pressure drop, cross section pebble bed size, and sphere diameter were analyzed using CFD method.

Copyright © 2012 by ASME

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