Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (6): 60603-060603.doi: 10.11889/j.0253-3219.2020.hjs.43.060603

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles    

Study on calculation method of one-dimensional steady temperature field of annular fuel pellets

Huiqiang MA1,2,Tao YU1,2(),Zhenping CHEN1,2,Pengcheng ZHAO1,2,Jinsen XIE1,2,Zijing LIU1,2,Jianxing LIU1,Zhouyang LEI1,2,Qingling HE1   

  1. 1.School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
    2.Hunan Engineering & Technology Research Center for Virtual Nuclear Reactor, University of South China, Hengyang 421001, China
  • Received:2019-12-13 Revised:2020-03-13 Online:2020-06-15 Published:2020-06-12
  • Contact: Tao YU E-mail:yutao29@sina.com
  • About author:MA Huiqiang, male, born in 1994, graduated from The Engineering&technical College of Chengdu University of Technology in 2017, master student, focusing on the research of reactor engineering
  • Supported by:
    University of South China Innovation Foundation For Postgraduate(193YXC021);Natural Science Foundation of Hunan Province(2018JJ4033)

Abstract: Background

The annular fuel pellet has a lower operating temperature, which can achieve higher power density, and has become one of the development directions of the advanced nuclear reactor fuel elements. The method of temperature field solution of rod fuel pellets can not solve the temperature field of annular fuel pellets due to the flow distribution and heat distribution problems in the double-sided cooling annular fuel elements.

Purpose

This study aims to calculate one-dimensional steady temperature field of the annular fuel core block.

Methods

Based on the thermal conductivity differential equation and Fourier law, a one-dimensional steady-state temperature field calculation model of annular fuel core block was established. Computational program of temperature field of annular fuel pellets (PTFA) was developed to calculate the position of the adiabatic surfaces, the maximum temperature of the adiabatic surfaces and the temperature field of the annular core block by using the equivalence of the boundary conditions. Results of the insulation surface position, maximum temperature and temperature field distribution of annular fuel pellets under different pellets thickness and different power densities were obtained. Finally, the finite element program COMSOL5.4 was employed to verify these results.

Results

The verification results show that the results calculated by the one-dimensional steady-state temperature field calculation model are in good agreement with those of the finite element method, and the relative deviation is less than 0.2%.

Conclusions

The model can be used for thermal-hydraulic calculation and analysis of annular fuel elements.

Key words: Annular fuel pellets, Temperature field, Steady heat conduction

CLC Number: 

  • TL99