Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Investigation of the Thermal Performance of a Vertical Two-Phase Closed Thermosyphon as a Passive Cooling System for a Nuclear Reactor Spent Fuel Storage Pool

  • Kusuma, Mukhsinun Hadi (Heat Transfer Laboratory, Department of Mechanical Engineering Universitas Indonesia) ;
  • Putra, Nandy (Heat Transfer Laboratory, Department of Mechanical Engineering Universitas Indonesia) ;
  • Antariksawan, Anhar Riza (Centre for Nuclear Reactor Safety and Technology, National Nuclear Energy Agency of Indonesia (BATAN)) ;
  • Susyadi, Susyadi (Centre for Nuclear Reactor Safety and Technology, National Nuclear Energy Agency of Indonesia (BATAN)) ;
  • Imawan, Ficky Augusta (Heat Transfer Laboratory, Department of Mechanical Engineering Universitas Indonesia)
  • Received : 2016.03.10
  • Accepted : 2016.10.15
  • Published : 2017.06.25
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Abstract

The decay heat that is produced by nuclear reactor spent fuel must be cooled in a spent fuel storage pool. A wickless heat pipe or a vertical two-phase closed thermosyphon (TPCT) is used to remove this decay heat. The objective of this research is to investigate the thermal performance of a prototype model for a large-scale vertical TPCT as a passive cooling system for a nuclear research reactor spent fuel storage pool. An experimental investigation and numerical simulation using RELAP5/MOD 3.2 were used to investigate the TPCT thermal performance. The effects of the initial pressure, filling ratio, and heat load were analyzed. Demineralized water was used as the TPCT working fluid. The cooled water was circulated in the water jacket as a cooling system. The experimental results show that the best thermal performance was obtained at a thermal resistance of $0.22^{\circ}C/W$, the lowest initial pressure, a filling ratio of 60%, and a high evaporator heat load. The simulation model that was experimentally validated showed a pattern and trend line similar to those of the experiment and can be used to predict the heat transfer phenomena of TPCT with varying inputs.

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References

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