Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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A Preliminary Assessment on ERVC Performance Depending on Insulation Conditions

단열재 조건에 따른 원자로용기 외벽냉각 성능 예비분석

  • 최동현 (경희대학교 원자력공학과) ;
  • 장윤석 (경희대학교 원자력공학과)
  • Received : 2023.05.26
  • Accepted : 2023.06.13
  • Published : 2023.06.30
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Abstract

Lots of researches have been conducted on in-vessel retention (IVR) to prevent or mitigate severe accident in nuclear power plants. Various methodologies were proposed and the external reactor vessel cooling was selected as a part of promising IVR strategy. In this study, the strategy is strengthened by enhancing the natural circulation performance through the adoption of insulation in the reactor cavity. A thermal analysis was carried out based on an assumed accident scenario and its results were used as boundary conditions for subsequent seven flow analysis cases. By comparing the natural circulation performance, effects of annular gaps and insulation shapes on the mass flow rate and flow velocity were quantified. The improvement in cooling performance can be reflected in actual design via detailed assessment.

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References

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