Study on the Dynamic Melting Characteristics of Coating Exposed to Non-eutectic Corium in Nuclear Reactor

Gong Tao; Zhang Luteng; Ma Zaiyong; Sun Wan; Zhu Longxiang; Lian Qiang; Tang Simiao; Pan Liangming

doi:10.13832/j.jnpe.2024.050035

Volume 46 Issue 3

Jun. 2025

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Article Navigation > Nuclear Power Engineering > 2025 > 46(3): 111-117

Gong Tao, Zhang Luteng, Ma Zaiyong, Sun Wan, Zhu Longxiang, Lian Qiang, Tang Simiao, Pan Liangming. Study on the Dynamic Melting Characteristics of Coating Exposed to Non-eutectic Corium in Nuclear Reactor[J]. Nuclear Power Engineering, 2025, 46(3): 111-117. doi: 10.13832/j.jnpe.2024.050035

Citation:

Gong Tao, Zhang Luteng, Ma Zaiyong, Sun Wan, Zhu Longxiang, Lian Qiang, Tang Simiao, Pan Liangming. Study on the Dynamic Melting Characteristics of Coating Exposed to Non-eutectic Corium in Nuclear Reactor[J]. Nuclear Power Engineering, 2025, 46(3): 111-117. doi: 10.13832/j.jnpe.2024.050035

Citation:

Gong Tao, Zhang Luteng, Ma Zaiyong, Sun Wan, Zhu Longxiang, Lian Qiang, Tang Simiao, Pan Liangming. Study on the Dynamic Melting Characteristics of Coating Exposed to Non-eutectic Corium in Nuclear Reactor[J]. Nuclear Power Engineering, 2025, 46(3): 111-117. doi: 10.13832/j.jnpe.2024.050035

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Study on the Dynamic Melting Characteristics of Coating Exposed to Non-eutectic Corium in Nuclear Reactor

doi: 10.13832/j.jnpe.2024.050035

Gong Tao^{1, 2
,},
Zhang Luteng^{1, 2
,
,},
Ma Zaiyong^{1, 2},
Sun Wan^{1, 2},
Zhu Longxiang^{1, 2},
Lian Qiang^{1, 2},
Tang Simiao^{1, 2},
Pan Liangming^{1, 2}

1.
Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing, 400044, China
2.
Department of Nuclear Engineering and Technology, Chongqing University, Chongqing, 400044, China

Received Date: 2024-05-20
Rev Recd Date: 2024-11-29

Available Online: 2025-06-09

Publish Date: 2025-06-09

Abstract

Abstract

To investigate the melting characteristics of the corium and coating materials in the reactor, the liquid NaNO₃-KNO₃ mixture is used as the corium and solid KNO₃ is used as the coating material to conduct experimental research on the dynamic melting characteristics of the coating. The results show that the melting process can be divided into three stages: corium quench solidification and remelting, diffusive melting of coating components and melting termination. In the process of melting, component diffusion is observed at the phase interface, and the instantaneous liquidus temperature at the phase interface is higher than that of the molten pool, resulting in the coating melting even when the phase interface temperature is lower than the melting point of the coating. On the basis of experiments, a melting characteristic model is established based on the heat and mass transfer relationship. The maximum error of component concentration and phase interface temperature is 4.5% and 11.3%, which proves the accuracy of the model.
- Corium,
- Non-eutectic,
- Coating,
- Melting,
- Component diffusion

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References(16)

References

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