Proceedings: Main coolant pump diagnostics

Main Coolant Pumps (BWR recirculation pumps and PWR Reactor Coolant Pumps - RCP's) are large, single-stage, vertical pumps. RCPs have been required to be monitored for pump health. This has been accomplished using vibration monitoring. The interpretation of this data, however, has not been completely understood. Recirculation pumps, in general, have not been monitored for pump health. Recent shaft cracks, bearing rubs, and other pump problems have shown that a better understanding of pump health would be of significant financial benefit to utilities. Consequently, a workshop was held March 29--31, 1988, in Toronto, Canada. The workshop was attended by representatives from utilities, NSSS suppliers, pump vendors, architect-engineers, consultants, universities, and the NRC. Proceedings of this workshop are contained in this report