铅铋快堆SGTR事故下高压过冷水注入高温铅铋合金流动传热数值模拟研究

刘莉; 袁俊杰; 顾汉洋; 包睿祺; 刘茂龙; 王科

doi:10.13832/j.jnpe.2023.04.0055

铅铋快堆SGTR事故下高压过冷水注入高温铅铋合金流动传热数值模拟研究

doi: 10.13832/j.jnpe.2023.04.0055

1.
上海交通大学核科学与工程学院，上海，200240
2.
中国石油大学（北京）机械与储运工程学院，北京，102249

基金项目: 国家自然科学基金资助项目（51906147）；上海市自然科学基金资助项目（21ZR1430900）

详细信息

作者简介:
刘　莉（1988—），女，副教授，研究方向为反应堆热工水力，E-mail: liulide@sjtu.edu.cn

通讯作者:
顾汉洋，E-mail: guhanyang@sjtu.edu.cn

中图分类号: TL331
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-28
- 修回日期: 2022-12-09
- 刊出日期: 2023-08-15

Numerical Study on Flow and Heat Transfer of High-pressure Sub-cooled Water Injection into High-temperature Lead-bismuth Alloy under Lead-bismuth Cooled Fast Reactor SGTR Accident

1.
School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
2.
College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing, 102249, China

摘要

摘要: 铅铋快堆内蒸汽发生器传热管两侧为高压过冷水和高温铅铋冷却剂，传热管两侧较大的压差和温差以及液态铅铋合金（LBE）的腐蚀效应可能造成蒸汽发生器传热管破裂（SGTR）事故。深入研究事故后高压过冷水冲击高温液态LBE的射流沸腾和相变产物蒸汽扩散的特征，具有十分重要的学术意义和工程应用价值。为揭示事故工况下液态LBE与水相互作用的传热传质机理，基于流体体积（VOF）方法，结合LES湍流模型和Lee相变模型，建立了水/蒸汽-液态铅铋多相流动与传热的三维数值计算模型，系统研究了高压过冷水注入高温LBE内发生的相变传热过程。结合注入压力及过冷水温度等因素，分析了射流沸腾过程中不同工况对射流形态、迁移深度以及沸腾行为的影响，研究结果可为SGTR事故工况下堆芯安全性预测提供指导。
- 铅铋快堆 /
- 蒸汽发生器传热管破裂（SGTR）事故 /
- 水/蒸汽-液态铅铋（LBE） /
- 射流沸腾
Abstract: There are high-pressure sub-cooled water and high-temperature lead-bismuth coolant on both sides of the heat transfer tube of the steam generator in the lead-bismuth fast reactor. The large pressure difference and temperature difference on both sides of the heat transfer tube and the corrosion effect of Lead-bismuth eutectic (LBE) may cause the steam generator heat transfer tube rupture (SGTR) accident. It is of great academic significance and engineering application value to deeply study the characteristics of jet boiling and phase change product steam diffusion of high-pressure sub-cooled water impacting LBE after the accident. In order to reveal the heat and mass transfer mechanism of the interaction between LBE and water under accident conditions, this paper establishes a three-dimensional numerical calculation model of water/steam-liquid lead-bismuth multiphase flow and heat transfer based on the volume of fluid (VOF) method, combined with LES turbulence model and Lee phase change model. The phase change and heat transfer process occurred during the high-pressure sub-cooled water injection into the high-temperature LBE is systematically studied. Combined with the factors such as injection pressure and sub-cooled water temperature, the effects of different conditions on the jet shape, migration depth and boiling behavior during the jet boiling process are analyzed. The research results can provide guidance for the prediction of core safety under SGTR accident conditions.
- Lead-bismuth cooled fast reactor /
- SGTR accident /
- Water/steam-LBE /
- Jet boiling

HTML全文

图 1 计算域

Figure 1. Computational Domain

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图 2 网格和时间步长无关性验证

Figure 2. Independence Verification of Grid and Time Step

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图 3 乙醇射流和FC3283沸腾过程的比较

Figure 3. Comparison of Boiling Processes of Ethanol Jet and FC3283

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图 4 乙醇蒸汽体积的计算

Figure 4. Calculation of Ethanol Vapor Volume

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图 5 乙醇蒸汽体积变化对比

Figure 5. Comparison of Ethanol Vapor Volume Changes

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图 6 射流轮廓绘制

Figure 6. Jet Profile Drawing Method

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图 7 过冷水射流和LBE相互作用过程

Figure 7. Interaction Process of Water Jet and LBE

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图 8 射流截面的温度分布

Figure 8. Temperature Distribution of Jet Cross Section

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图 9 水锤效应引起的压力波动

Figure 9. Pressure Fluctuation Caused by Water Hammer Effect　　　　　　

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图 10 不同过冷水温度下过冷水和LBE相互作用过程

Figure 10. Interaction Process of Sub-cooled Water and LBE at Different Water Temperatures

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图 11 不同注入压力下过冷水和LBE相互作用过程

Figure 11. Interaction Process of Sub-cooled Water and LBE at Different Injection Pressures

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表 1 模拟计算工况

Table 1. Simulation Calculation Conditions

工况	Case 1	Case 2	Case 3	Case 4	Case 5
入口压力/MPa	2	4	6	8	10
过冷水温度/℃	200	200	200	200	200
LBE温度/℃	400	400	400	400	400

工况	Case 6	Case 7	Case 8	Case 9
入口压力/MPa	6	6	6	6
过冷水温度/℃	140	170	230	260
LBE温度/℃	400	400	400	400

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参考文献(16)

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