A New Method for On-Line Monitoring of Pressure-Retaining Equipment in Nuclear Power Plants

摘要

The on-line monitoring technology is very important to keep safe operation of the pressure-retaining equipment in nuclear power plants (NPPs). In this paper, some currently used monitoring methods in NPPs have been studied carefully, their main characteristics have been generalized. It found that some fatigue cracking of the pressure-retaining equipment can't be effectively monitored by those systems. In order to solve this problem, a multifunctional smart layer has been designed to monitor the pressure-retaining equipment in NPPs. The structure schematic diagram of the smart layer has been drawn and basic functions of the monitoring system have been developed. Some key techniques to apply the smart layer into the on-line monitoring system of the pressure-retaining equipment in NPPs are generalized. It will be a promising method for monitoring the degradation state of pressure-retaining equipment in NPPs.