Experimental and Numerical Simulation Study on Pressure Suppression Characteristics of Small PWR
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摘要: 为了研究小型压水堆抑压系统的抑压效果，建立了小型安全壳抑压特性试验装置，开展了定流量和变流量混合气体排放实验，以研究气-水容积比和不可凝气体对抑压效果的影响。实验结果表明，气-水容积比在2~4.55范围内，随着气-水容积比的增大，抑压效果逐渐增强；混合气体中不可凝气体含量对抑压效果影响显著。对实验进行了数值模拟，模拟结果可以反映抑压试验的现象规律，但仍需进一步优化抑压冷凝相关模型以提高模拟精度。Abstract: In order to study the pressure suppression effect of suppression system of small PWR, a small containment pressure suppression characteristic test device is established. Constant flow mixed gas emission test and variable flow mixed gas emission test are carried out to study the influence of gas-water volume ratio and non-condensable gas on the pressure suppression effect. The experimental result results show that when the gas-water volume ratio is in the range of 2~4.55, the pressure suppression effect gradually increases with the increase of the gas-water volume ratio; The content of non-condensable gas in the mixed gas has a significant influence on the pressure suppression effect. The numerical simulation of the experiment is carried out, and the simulation results can reflect the phenomenon law of the pressure suppression test, but the pressure suppression condensation model still needs to be further optimized to improve the simulation accuracy.
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Key words:
- Small PWR /
- Small containment /
- Suppression characteristics /
- Experimental study /
- Numerical simulation
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图 2 实验装置控制体节点划分示意图
Figure 2. Schematic Diagram of Node Division of Experimental Device Control Volume
图 3 抑压水箱水池温度变化（工况1、2、3）
Figure 3. Temperature Change of Pressure Suppression Water Tank(Conditions 1, 2 and 3)
图 4 抑压水箱气空间压力变化（工况1、2、3）
Figure 4. Gaseous Space Pressure Change of Pressure Suppression Water Tank (Conditions 1, 2 and 3)
图 6 抑压水箱气空间压力变化（工况6、7）
Figure 6. Gaseous Space Pressure Change of Pressure Suppression Water Tank (Conditions 6 and 7)
图 7 抑压水箱水池温度变化（工况6、7）
Figure 7. Temperature Change of Pressure Suppression Water Tank (Conditions 6 and 7)
图 8 排放混合气体总质量变化（工况6、7）
Figure 8. Total Mass Change of Exhaust Gas Mixture (Conditions 6 and 7)
图 9 抑压水箱气空间压力变化（工况1、4、5）
Figure 9. Gaseous Space Pressure Change of Pressure Suppression Water Tank (Conditions 1, 4 and 5)
图 10 安全壳内压力变化（工况6、7、8）
Figure 10. Pressure Change in Containment (Conditions 6, 7 and 8)
图 11 抑压水箱气空间压力变化（工况6、7、8）
Figure 11. Gaseous Space Pressure Change of Pressure Suppression Water Tank (Conditions 6, 7 and 8)
图 12 抑压水箱水池温度变化（工况6、7、8）
Figure 12. Temperature Change of Pressure Suppression Water Tank (Conditions 6, 7 and 8)
表 1 定流量下试验工况
Table 1. Test Condition under Constant Flow
工况序号 工况类型 气-水容积比 浸没深度/m 蒸汽流量/(g·s−1) 氮气流量/(g·s−1) 工质温度/℃ 工况1 基准工况 4.55 0.62 19 1 170 工况2 气-水容积比比对工况 3 0.62 19 1 170 工况3 2 0.62 19 1 170 工况4 不可凝气体影响比对工况 4.55 0.62 20 0 170 工况5 4.55 0.62 38 2 170 
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表 2 变流量下试验工况
Table 2. Test Condition under Variable Flow
工况序号 工况类型 气-水容积比 浸没深度/m 蒸汽体积份额/% 安全壳压力/kPa 工质温度/℃ 工况6 基准工况 4.55 0.62 88 500 152 工况7 气-水容积比比对工况 2 0.62 88 500 152 工况8 不可凝气体影响比对工况 3 0.62 92 500 152
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