Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Development and validation of the lead-bismuth cooled reactor system code based on a fully implicit homogeneous flow model

  • Received : 2023.07.03
  • Accepted : 2023.11.10
  • Published : 2024.04.25
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Abstract

The liquid lead-bismuth cooled fast reactor has been in a single-phase, low-pressure, and high-temperature state for a long time during operation. Considering the requirement of calculation efficiency for long-term transient accident calculation, based on a homogeneous hydrodynamic model, one-dimensional heat conduction model, coolant flow and heat transfer model, neutron kinetics model, coolant and material properties model, this study used the fully implicit difference scheme algorithm of the convection-diffusion term to solve the basic conservation equation, to develop the transient analysis program NUSOL-LMR 2.0 for the lead-bismuth fast reactor system. The steady-state and typical design basis accidents (including reactivity introduction, loss of flow caused by main pump idling, excessive cooling, and plant power outage accidents) for the ABR have been analyzed. The results are compared with the international system analysis software ATHENA. The results indicate that the developed program can stably, accurately, and efficiently predict the transient accident response and safety characteristics of the lead-bismuth fast reactor system.

Keywords

Acknowledgement

This project is supported by the National Natural Science Foundation of China (12005162). It is also financially supported by the Innovative Scientific Program of the CNNC.

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