铅铋合金系统氧控旁路性能数值研究

李小波; 王译锋; 朱卉平; 刘洋; 牛风雷

doi:10.13832/j.jnpe.2021.05.0189

铅铋合金系统氧控旁路性能数值研究

doi: 10.13832/j.jnpe.2021.05.0189

华北电力大学核科学与工程学院，北京，102206

基金项目: 国家重点研发项目（2019YFB1901301）；国家自然科学基金项目（11635005，11705059）

详细信息

作者简介:
李小波（1991—），男，博士研究生，现从事第四代堆技术研发工作，E-mail：lixiaobo@ncepu.edu.cn

中图分类号: TL363⁺.4
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出版历程
- 收稿日期: 2020-07-28
- 修回日期: 2020-09-10
- 刊出日期: 2021-09-30

Numerical Study on the Performance of Oxygen Control Bypass of Lead-Bismuth Eutectic System

School of Nuclear Science and Engineering, North China Electric Power University, Beijing, 102206, China

摘要

摘要: 为研究通过固态氧控有效调节铅铋合金（LBE）系统氧浓度的方法，本文通过修正液态LBE腐蚀经验公式，结合氧化铅（PbO）溶解模型，基于集总参数法并使用FORTRAN语言自编程序计算LBE系统氧浓度；据此研究主回路流量、质量交换器（MX）内温度、PbO装量对自主设计的小型LBE系统的MX供氧性能的影响；初步建立MX设计准则，获得一定约束条件下MX供氧性能及其氧控旁路设计参数。本研究可为LBE系统氧控旁路的设计和计算提供参考，同时提供一种高效求解LBE系统瞬态氧浓度和腐蚀的计算方法，为建立氧浓度模型预测系统提供新思路。
- 集总参数法 /
- LBE /
- 腐蚀 /
- PbO溶解模型
Abstract: In order to explore the method for efficiently regulating the oxygen concentration of lead-bismuth eutectic (LBE) system by solid-phase oxygen control, this study calculates the oxygen concentration of LBE system by the self-programmed code in FORTRAN language based on the lumped parameter method, by correcting the empirical formula for liquid LBE corrosion and in combination with the PbO dissolution model, and then studies thereby the effects of the main loop flow rate, temperature in the mass exchanger (MX), and PbO inventory on the MX oxygen supply performance of the independently designed small LBE system, to establish the preliminary design criteria of MX thus to obtain the oxygen supply performance of MX and design parameters of oxygen supply bypass under certain constraints. This study can provide a reference for the design and calculation of the oxygen control bypass of LBE system, and also present an efficient approach to calculating the transient oxygen concentration and corrosion of the LBE system to give a new insight into establishing the oxygen concentration model prediction system.
- Lumped parameter method /
- LBE /
- Corrosion /
- PbO dissolution model

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图 1 几何模型示意图

Figure 1. Schematic Diagram of Geometric Model

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图 2 雷诺数对比

Figure 2. Re Comparison

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图 3 施密特数对比

Figure 3. Sc Comparison

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图 4 MX内PbO平均溶解速率对比

Figure 4. Comparison of Average Dissolution Rate of PbO in MX

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图 5 主回路流量对供氧速率及建立稳态时长的影响

Figure 5. Effect of Main Loop Flow Rate on Oxygen Supply Rate and Time for Reaching Steady-State

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图 6 MX温度对供氧速率及建立稳态时长的影响

Figure 6. Effect of MX Temperature on Oxygen Supply Rate and Time for Reaching Steady-State

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图 7 PbO装量对供氧速率及建立稳态时长的影响

Figure 7. Effect of PbO Inventory on Oxygen Supply Rate and Time for Reaching Steady-State

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图 8 主回路流量对氧浓度及腐蚀深度的影响

Figure 8. Effect of Main Loop Flow Rate on Oxygen Concentration and Corrosion Depth

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图 9 MX温度对氧浓度及腐蚀深度的影响

Figure 9. Effect of MX Temperature on Oxygen Concentration and Corrosion Depth

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图 10 PbO装量对氧浓度及腐蚀深度的影响

Figure 10. Effect of PbO Inventory on Oxygen Concentration and Corrosion Depth

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表 1 CRAFT台架相关参数

Table 1. Design Parameters Related to CRAFT Bench

参数	数值
冷却剂装量/L	500
主回路管径/mm	50.0
主回路最大流速/(kg·s⁻¹)	10
供氧旁路最大流速/(kg·s⁻¹)	4
PbO颗粒直径/mm	12
PbO颗粒最大装量/颗	78
MX有效长度/mm	75
质量交换器内径/mm	47
孔隙率	0.46

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表 2 不同影响因素对应边界条件

Table 2. Boundary Conditions Corresponding to Different Factors　　　　　　　

影响因素	边界值
影响因素	主回路流量/ (kg·s⁻¹)	旁路流量/ (kg·s⁻¹)	MX温度/K	PbO装量比
主回路流量	1~5	1	623.15	0.06
MX温度	5	1	543.15~773.15	0.06
PbO装量比	5	1	623.15	0.04~0.1

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表 3 MX氧控旁路设计参数

Table 3. Design Parameters of MX Oxygen Control Bypass

参数名	数值或范围
氧控旁路体积占比	0.03（固定）
δ	>0.2
MX温度/K	623.15~688.15
PbO装量比	<0.06
主回路流量/(kg·s⁻¹)	<3

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参考文献(9)

[1]	BRISSONNEAU L, BEAUCHAMP F, MORIER O, et al. Oxygen control systems and impurity purification in LBE: learning from DEMETRA project[J]. Journal of Nuclear Materials, 2011, 415(3): 348-360. doi: 10.1016/j.jnucmat.2011.04.040
[2]	MARTYNOV P N, ASKHADUUIN R S, SIMAKOV A, et a1. Designing mass exchangers for control of oxygen content in Pb-Bi(PB) coolants in various research facilities[C]. Proceedings of the 17th International Conference on Nuclear Engineering(ICONEl7), USA: Brussels, Belgium, 2010.
[3]	杜晓超. 液态金属中的固态氧控与相关问题研究[D]. 北京: 华北电力大学核科学与工程学院, 2017.
[4]	LIM J, MARINO A, AERTS A. Active oxygen control by a PbO mass exchanger in the liquid lead–bismuth eutectic loop: MEXICO[J]. Journal of Nuclear Science and Technology, 2016, 54(1): 131-137.
[5]	MARINO A, LIM J, KEIJERS S, et al. A mass transfer correlation for packed bed of lead oxide spheres in flowing lead–bismuth eutectic at high Péclet numbers[J]. International Journal of Heat and Mass Transfer, 2015, 80(9): 737-747.
[6]	LIM J, MARIËN A, ROSSEEL K. et al et al. Accuracy of potentiometric oxygen sensors with Bi/Bi₂O₃ reference electrode for use in liquid LBE[J]. Journal of Nuclear Materials, 2012, 429(1): 270-275.
[7]	秦博,付晓刚,马浩然,等. 铅铋合金气相氧含量控制初步实验研究[J]. 材料导报,2019, 33(11): 1821-1824. doi: 10.11896/cldb.18040160
[8]	ZHANG J, LI N. Analysis on liquid metal corrosion-oxidation interactions[J]. Corrosion Science, 2007, 49(11): 4154-4184. doi: 10.1016/j.corsci.2007.05.012
[9]	YU B M, LI H M. A geometry model for tortuosity of flow path in porous media[J]. Chinese Physics Letters, 2004, 21(8): 1569-1571. doi: 10.1088/0256-307X/21/8/044