核电厂声学泄漏监测系统的设计和验证

Design and Verification of Acoustic Leak Monitoring System for Nuclear Power Plants

介绍VVER-1000型核电厂声学泄漏监测系统的设计基准和功能,给出判断泄漏过程、确定泄漏量和泄漏位置的系统算法。建立主回路声模型结构图,计算得到环路背景噪声分布,并和实际机组上的试验结果进行对比。建立管道模型的试验台架,并对管道模型进行了试验验证。根据试验数据得到用于计算泄漏量大小和泄漏位置的相关系数。通过核电厂声学泄漏监测系统的设计和验证,为开发田湾核电厂1、2号机组在线的核电厂声学泄漏监测系统奠定了基础。

This paper considers the design basis and function of leakage monitoring system in nuclear power plants with VVER-1000. The process of the leak judgment and algorithm of leakage flowrate and leakage location are introduced. The scheme of acoustic model chart of the reactor coolant circuit is established and background noise in the reactor coolant circuit loop is obtained from calculation, and compared with the actual test results. The test bench of pipeline model is established and pipeline model is verified by the test bench. The correlation coefficient used to calculate the leakage flowrate and leakage location is obtained based on the test result. Through the design and verification of the acoustic leak monitoring system for nuclear power plants, the solid foundation is laid for the development of the online acoustic leak monitoring system for Unit 1 and Unit 2 in Tianwan Nuclear Power Plant.