Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (11): 110601-110601.doi: 10.11889/j.0253-3219.2018.hjs.41.110601

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Location calculation of shim rods in thorium molten salt reactor with solid fuel

ZHU Guifeng, YAN Rui, YU Shihe, PENG Honghua, KANG Xuzhong, YANG Pu, ZHOU Bo, ZOU Yang   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2018-06-22 Revised:2018-09-18 Online:2018-11-10 Published:2018-11-20
  • Supported by:
    Supported by Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA02010000), the Frontier Science Key Program of Chinese Academy of Sciences (No.QYZDY-SSW-JSC016)

Abstract: [Background] The location of shim rods is one important monitoring parameter of nuclear reactor, and the shift of shim rods will affect the core physical parameters.[Purpose] This study aims to calculate the location of shim rods varied with burnup time in thorium molten salt reactor with solid fuel (TMSR-SF1), and analyze its effect on the spatial distribution of power density, flux and burnup.[Methods] A reactivity search by adjusting shim rods is coupled to conventional Monte Carlo burnup code. It is validly shown that 3 times are mostly required to realize reactivity convergence. The location of shim rods with one group scheme in TMSR-SF1 is calculated.[Results] Results show that shim rods are sharply moved when near to the time of xenon equilibrium and end of life, while linear changed under middle burnup time. Shim rods at the beginning are located in the upper side of half rod route, which increases the axial unevenness of power density and flux. The power peak factor and maximum flux are 17% and 12% larger than those at the end of life.[Conclusions] This change of power peak factor and maximum flux are accepted and it is feasible to use one group scheme of shim rods in TMSR-SF1.

Key words: Burnup, Shim rods, TMSR-SF1

CLC Number: 

  • TL3