基于RELAP5的窄缝通道再淹没模型适应性研究

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基金项目:

国家自然科学基金(11275178)

Research on Reflood Model of Narrow Channel Based on RELAP5

Science and Technology on Reactor System Design Technology, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 基于Saxena窄缝通道再淹没实验,评价RELAP5再淹没模型对窄缝通道的适用性。研究表明,现有的RELAP5程序高估了骤冷前沿推进速率,对于壁面温度的预测也存在较大偏差。结合国内外对窄缝通道临界后热工水力特性的认识,从热工水力机理出发分别对RELAP5再淹没相间摩擦、单相蒸汽传热、膜态沸腾传热、临界热流密度等模型进行修改,初步建立窄缝通道再淹没计算模型。该模型计算结果与Saxena实验结果符合较好。
- 窄缝通道 /
- 再淹没 /
- RELAP5 /
- 膜态沸腾
Abstract: This paper evaluates the applicability of RELAP5 reflood models for the narrow channel based on the Saxena experiment.The calculated results show that RELAP5 overestimates the quench front velocity and underestimates the wall temperature.Combined the post-DNB thermal-hydraulic characteristics in the narrow channel,the interphase drag,single vaper,film boiling and critical heat flux model were modified.The calculated results based on the new reflood model agree better with the Saxena experiment.
- Narrow channel /
- Reflood /
- RELAP5 /
- Film boiling