Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Thermal-fluid-structure coupling analysis on plate-type fuel assembly under irradiation. Part-II Mechanical deformation and thermal-hydraulic characteristics

  • Li, Yuanming (Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • Ren, Quan-yao (Science and Technology on Reactor System Design Technology Laboratory) ;
  • Yuan, Pan (Science and Technology on Reactor System Design Technology Laboratory) ;
  • Su, Guanghui (Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • Yu, Hongxing (Science and Technology on Reactor System Design Technology Laboratory) ;
  • Zheng, Meiyin (Science and Technology on Reactor System Design Technology Laboratory) ;
  • Wang, Haoyu (Science and Technology on Reactor System Design Technology Laboratory) ;
  • Wu, Yingwei (Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University) ;
  • Ding, Shurong (Institute of Mechanics and Computational Engineering, Department of Aeronautics and Astronautics, Fudan Univeristy)
  • Received : 2020.06.21
  • Accepted : 2020.11.30
  • Published : 2021.05.25
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Abstract

The plate-type fuel assembly adopted in nuclear research reactor suffers from complicated effect induced by non-uniform irradiation, which might affect stress conditions, mechanical behaviors and thermal-hydraulic performance of the fuel assembly. This paper is the Part II work of a two-part study devoted to analyzing the complex unique mechanical deformation and thermal-hydraulic characteristics for the typical plate-type fuel assembly under irradiation effect, which is on the basis of developed and verified numerical thermal-fluid-structure coupling methodology under irradiation in Part I of this work. The mechanical deformation, thermal-hydraulic performance and Mises stress have been analyzed for the typical plate-type fuel assembly consisting of support plates under non-uniform irradiation. It was interesting to observe that: the plate-type fuel assembly including the fuel plates and support plates tended to bend towards the location with maximum fission rate; the hot spots in the fuel foil appeared at the location with maximum thickness increment; the maximum Mises stress of fuel foil was located at the adjacent location with the maximum plate thickness increment et al.

Keywords

Acknowledgement

The authors are grateful for the support of the Natural Science Foundation of China (Grant No: U20B2013, U1867219, 11675161).

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