Journal
NUCLEAR ENGINEERING AND DESIGN
Volume 300, Issue -, Pages 495-505Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.nucengdes.2016.02.002
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Funding
- National Natural Science Foundation of China [51576211, 11072131]
- Science Fund for Creative Research Groups of National Natural Science Foundation of China [51321002]
- Foundation for the Author of National Excellent Doctoral Dissertation of PR China (FANEDD) [201438]
- CSC (China Scholarship Council) [201406210093]
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A flow-corrective insert is adopted in the pebble-bed high temperature gas-cooled reactor (HTGR) to improve flow performance of the pebble flow for the first time. 3D discrete element method (DEM) modeling is employed to study this slow and dense granular flow. It is verified that locating a properly designed insert in the bed can help transform unsatisfactory flow field to the preferred flow pattern for pebble bed reactors. Three characteristic values on the stagnant zone, radial uniformity and flow sequence of pebble flow are defined to evaluate uniformity of the overall flow field quantitatively. The results demonstrate that the pebble bed equipped with an insert performs better than normal beds from all these three aspects. Moreover, based on numerical experiments, several universal tips for insert design on height, location and outlet diameter are suggested. (C) 2016 Elsevier B.V. All rights reserved.
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