核反应堆非共晶熔融物对涂层消熔动态特性研究

龚涛; 张卢腾; 马在勇; 孙皖; 朱隆祥; 连强; 唐思邈; 潘良明

doi:10.13832/j.jnpe.2024.050035

核反应堆非共晶熔融物对涂层消熔动态特性研究

doi: 10.13832/j.jnpe.2024.050035

龚涛^{1, 2,},
张卢腾^{1, 2, ,},
马在勇^{1, 2},
孙皖^{1, 2},
朱隆祥^{1, 2},
连强^{1, 2},
唐思邈^{1, 2},
潘良明^{1, 2}

1.
重庆大学低品位能源利用技术及系统教育部重点实验室，重庆，400044
2.
重庆大学核工程与核技术学院，重庆，400044

基金项目: 国家自然科学基金（12375165）

详细信息

作者简介:
龚　涛（2001—），男，硕士研究生，现主要从事反应堆热工水力方面的研究，E-mail: 1976501351@qq.com

通讯作者:
张卢腾，E-mail: ltzhang@cqu.edu.cn

中图分类号: TL334
计量
- 文章访问数: 12
- HTML全文浏览量: 5
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2024-05-20
- 修回日期: 2024-11-29
- 网络出版日期: 2025-06-09
- 刊出日期: 2025-06-09

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

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

摘要

摘要: 为揭示熔融物与反应堆内部分装置上涂层材料的消熔特性，本研究以液态NaNO₃-KNO₃混合物作熔融物、固态 KNO₃作涂层材料，开展了涂层消熔动态特性实验研究。结果表明，消熔过程可分为3个阶段：熔融物骤冷凝固及再熔化阶段、涂层组分扩散消熔阶段、消熔终止阶段。消熔过程中，相界面存在组分扩散现象，相界面瞬时液相线温度高于熔池瞬时液相线温度，导致在相界面温度低于涂层熔点的情况下依然出现涂层熔解。在实验基础上，基于传热传质关系建立了消熔特性模型，计算得到组分浓度最大误差为4.5%，相界面温度最大误差为11.3%，证明了模型的准确性。
- 熔融物 /
- 非共晶 /
- 涂层 /
- 消熔 /
- 组分扩散
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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图 1 实验装置示意图

Figure 1. Schematic Diagram of Experimental Apparatus

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图 2 加热棒位置示意图

Figure 2. Schematic Diagram of Heating Rod Location

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图 3 消熔罐热电偶安装位置示意图

Figure 3. Installation Position Diagram of Melting Tank Thermocouple

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图 4 熔池温度瞬态变化

Figure 4. Transient Change of Corium Pool Temperature

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图 5 相界面温度与涂层消熔厚度瞬态变化

Figure 5. Transient Changes of Phase Interface Temperature and Coating Melting Thickness

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图 6 熔池和相界面K⁺浓度瞬态变化

Figure 6. Transient Change of K⁺ Concentration in Corium Pool and Interface

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图 7 熔池与相界面液相线温度变化

Figure 7. Transient Change of Liquidus Temperature of Corium Pool and Interface

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图 8 相界面位置K⁺浓度变化

Figure 8. Transient Change of K⁺ Concentration at Interphase

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图 9 相界面位置液相线温度变化

Figure 9. Transient Change of Liquidus Temperature at Interphase

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图 10 相界面温度瞬态变化

Figure 10. Transient Change of Interface Temperature

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表 1 相关物性参数

Table 1. Related Physical Property Parameters

参数	50%^①KNO₃-50%NaNO₃ 混合物	KNO₃固体
熔点/℃	222	335
密度/(kg·m⁻³)	1900	2110
比热/(J·kg⁻¹·K⁻¹)	1380	1819
导热系数/ (W·m⁻¹·K⁻¹)	0.44	0.85
注：①—摩尔分数，下同。

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参考文献(16)

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