Mistras - Loose Parts Detection

Loose Parts monitoring has been a requirement on nuclear plant for many years. Early LPME systems used a tape recorder to record the sounds from loose parts, this could miss the event in the case of intermittent impacts. The Physical Acoustics LPME system uses modern high speed digital electronics to continuously monitor, and by using pre-trigger the system will data stream the signal to hard drive in the event of impact detection, without loss of information.

The 19” chassis takes the Physical Acoustics PCI-8-LF advanced 8-channel PCI data acquisition boards, and in a single 19” width will take >64 channels. Bus speeds of up to 132 MB per second ensure no data loss. The standard LPME system is 16 channels, leaving ample room for future expansion. Parameter channels are also provided. The chassis is complete with audio monitor, CD, network, and hit LED indicators. The windows based LPME software provides all the necessary data acquisition and analysis functions to meet and exceed the LPME standards (1,2). These include both manual and automatic operation modes, continuous noise analysis and trend screens, signal and location analysis, waveform analysis, correlation and fft, and a diagrammatic representation of the system being monitored together with sensors and alarm status. The system is supplied complete in a seismic cabinet, or components for OEM or custom builds.

Operating Environment:
Temperature: 10 - 45° C Humidity: 8 – 90% Relative Humidity, non-condensing
Altitude: 10000 feet pressure altitude Shock: 10g, 3 axis
Vibration: 1.5g, 3 axis

PLEASE CONTACT US FOR PROPOSALS ON ANY SPECIFIC PLANT INSTALLATION, WE PROVIDE A FULL SERVICE TO DESIGN A SYSTEM TO MEET CURRENT AND FUTURE CUSTOMER REQUIREMENTS.

1. "Loose Part Detection Program for the Primary System of Light Water Cooled Reactors", US Nuclear Regulatory Guide #1.133, dated May 1981.

2. "Standards and Guides for Operation and Maintenance of Nuclear Power Plants", ASME Document # OM-S/G-1997, part 12, "Loose Part Monitoring in Light Water Reactor Plants".