压力容器下封头异物在役清洁技术研究

Research on Foreign Body In-Service Cleaning Technology for Pressure Vessel Lower Head

针对反应堆压力容器下封头异物清洁的需要,研究异物抽吸技术。建立固体颗粒在液体中的简化受力模型。进行仿真分析,获得抽吸所需的流速与颗粒质量及密度的关系式。在此基础上设计压力容器下封头抽吸装置,并对其抽吸能力进行分析和试验。试验结果表明,该抽吸装置性能良好。

To satisfy the need of cleaning solid impurity in the reactor pressure vessel lower head,foreign body pumping technology is studied.After designing a simplified force model of solid granule in fluid,relationship between the liquid velocity and both mass and density is elicited via analysis.Based on this,draining circuit and mechanical structure is engineered,and analysis and experiment are also conducted.The result shows that the equipment performs well,which proved the correctness of theoretical research.