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There are two main types of decay heat removal in sodium-cooled fast reactor cores, namely direct reactor auxiliary cooling system (DRACS) and primary reactor auxiliary cooling system (PRACS). In this paper, the flow and heat transfer of sodium fluid on PLANDTL-DHX experimental setup during natural circulation were observed by three-dimensional simulation of the PRACS. In this work, three-dimensional numerical modeling and calculation of PLANDTL-DHX experimental setup are carried out. At the same time, PLANDTL-DHX is verified in steady state and compared with experimental data. On this basis, the transient operation conditions of PRACS are calculated and transient calculation is carried out to compare the decay heat removal capacity of PRACS.

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Three-Dimensional CFD Simulation on PRACS Decay Heat Removal Capability Under Natural Circulation Based on PLANDTL Facility

  • 会议论文

  • 发表日期：

    2026年

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  • Yue Liu,
  • Xinyue Luo,
  • Ruoyu Liu,
  • Guodong Li,
  • Haijie Song,
  • Yuhao Zhang,
  • Daogang Lu

摘要

There are two main types of decay heat removal in sodium-cooled fast reactor cores, namely direct reactor auxiliary cooling system (DRACS) and primary reactor auxiliary cooling system (PRACS). In this paper, the flow and heat transfer of sodium fluid on PLANDTL-DHX experimental setup during natural circulation were observed by three-dimensional simulation of the PRACS. In this work, three-dimensional numerical modeling and calculation of PLANDTL-DHX experimental setup are carried out. At the same time, PLANDTL-DHX is verified in steady state and compared with experimental data. On this basis, the transient operation conditions of PRACS are calculated and transient calculation is carried out to compare the decay heat removal capacity of PRACS.