Fuel coolant interaction (FCI) is a phenomenon that occurs when molten material comes into contact with coolant during severe accidents in nuclear reactor. High temperature and pressure load generated by energetic FCI may threaten the integrity of the pressure vessel and even cause the radioactive leakage. Despite extensive experimental and theoretical research on FCI, its mechanisms have not been completely understood due to the complexity of the process, underscoring the importance of further research into FCI for safety purposes. The accident Scenario Computation and Evaluation software for Nuclear Energy System_Core Melting (SCENES_CM) is a proprietary mechanism model analysis program for core behavior during severe accidents developed by Shanghai Jiao Tong University. The present paper is concerned with the validation of the FCI model of SCENES_CM through a series of experiments conducted within the FARO facility. The simulation results align well with the FARO experimental data, confirming the code's ability to accurately simulate the behavior of molten material transitioning from melt jet break-up to debris bed formation, thereby validating its reliability.

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Evaluation of Fuel Coolant Interaction Model in SCENES_CM Based on FARO Experiments

  • Danting Zhao,
  • Feng Guo,
  • Yanhua Yang,
  • Meng Zhao,
  • Hao Zhang

摘要

Fuel coolant interaction (FCI) is a phenomenon that occurs when molten material comes into contact with coolant during severe accidents in nuclear reactor. High temperature and pressure load generated by energetic FCI may threaten the integrity of the pressure vessel and even cause the radioactive leakage. Despite extensive experimental and theoretical research on FCI, its mechanisms have not been completely understood due to the complexity of the process, underscoring the importance of further research into FCI for safety purposes. The accident Scenario Computation and Evaluation software for Nuclear Energy System_Core Melting (SCENES_CM) is a proprietary mechanism model analysis program for core behavior during severe accidents developed by Shanghai Jiao Tong University. The present paper is concerned with the validation of the FCI model of SCENES_CM through a series of experiments conducted within the FARO facility. The simulation results align well with the FARO experimental data, confirming the code's ability to accurately simulate the behavior of molten material transitioning from melt jet break-up to debris bed formation, thereby validating its reliability.