Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Development of a special thermal-hydraulic component model for the core makeup tank

  • Kim, Min Gi (School of Mechanical Engineering, Pusan National University) ;
  • Wisudhaputra, Adnan (School of Mechanical Engineering, Pusan National University) ;
  • Lee, Jong-Hyuk (Korea Atomic Energy Research Institute (KAERI)) ;
  • Kim, Kyungdoo (Korea Atomic Energy Research Institute (KAERI)) ;
  • Park, Hyun-Sik (Korea Atomic Energy Research Institute (KAERI)) ;
  • Jeong, Jae Jun (School of Mechanical Engineering, Pusan National University)
  • Received : 2021.08.31
  • Accepted : 2021.11.29
  • Published : 2022.05.25
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Abstract

We have assessed the applicability of the thermal-hydraulic system analysis code, SPACE, to a small modular reactor called SMART. For the assessment, the experimental data from a scale-down integral-test facility, SMART-ITL, were used. It was conformed that the SPACE code unrealistically calculates the safety injection flow rate through the CMT and SIT during a small-break loss-of-coolant experiment. This unrealistic behavior was due to the overprediction of interfacial heat transfer at the steam-water interface in a vertically stratified flow in the tanks. In this study, a special thermal-hydraulic component model has been developed to realistically calculate the interfacial heat transfer when a strong non-equilibrium two-phase flow is formed in the CMT or SIT. Additionally, we developed a special heat structure model, which analytically calculates the heat transfer from the hot steam to the cold tank wall. The combination of two models for the tank are called the special component model. We assessed it using the SMART-ITL passive safety injection system (PSIS) test data. The results showed that the special component model well predicts the transient behaviors of the CMT and SIT.

Keywords

Acknowledgement

This research was supported by KAERI and King Abdullah City for Atomic and Renewable Energy (K.A.CARE), Kingdom of Saudi Arabia, within the Joint Research and Development Center.

References

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