介绍了高压给水加热器发生管束漏泄时所产生的声发射信号的特征，据此研制了在线监测系统。经实践证明，采用声发射技术监测高加漏泄，具有及时、准确的优点。进行实时在线监测，不仅能准确及时地确定出漏泄部位和漏泄时间，而且可为检修提供依据。 The characteristics of acoustic emission signal generated when tube bundle leakage occurs in high pressure feedwater heater are introduced. On the basis of this, an on-line monitoring system is developed. Proved by practice, the use of acoustic emission technology to detect high plus leakage, with timely and accurate advantages. Real-time online monitoring, not only accurately and timely to determine the leakage site and leakage time, but also provide the basis for maintenance.