Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Uncertainty analysis of heat transfer of TMSR-SF0 simulator

  • Jiajun Wang (Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Ye Dai (Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Yang Zou (Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Hongjie Xu (Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
  • Received : 2023.07.11
  • Accepted : 2023.11.08
  • Published : 2024.02.25
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Abstract

The TMSR-SF0 simulator is an integral effect thermal-hydraulic experimental system for the development of thorium molten salt reactor (TMSR) program in China. The simulator has two heat transport loops with liquid FLiNaK. In literature, the 95% level confidence uncertainties of the thermophysical properties of FLiNaK are recommended, and the uncertainties of density, heat capacity, thermal conductivity and viscosity are ±2%, ±10, ±10% and ±10% respectively. In order to investigate the effects of thermophysical properties uncertainties on the molten salt heat transport system, the uncertainty and sensitivity analysis of the heat transfer characteristics of the simulator system are carried out on a RELAP5 model. The uncertainties of thermophysical properties are incorporated in simulation model and the Monte Carlo sampling method is used to propagate the input uncertainties through the model. The simulation results indicate that the uncertainty propagated to core outlet temperature is about ±10 ℃ with a confidence level of 95% in a steady-state operation condition. The result should be noted in the design, operation and code validation of molten salt reactor. In addition, more experimental data is necessary for quantifying the uncertainty of thermophysical properties of molten salts.

Keywords

Acknowledgement

This study is supported by the Thorium Molten Salt Reactor Nuclear Energy System (No. XD02001002).

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