Comparison results show consistent behaviour between the measured and predicted results. Due to some unexplained cracking, the thermometers installed in 1987 were all replaced. All other thermometers have had no problems and provide good data. The thermometers all show some initial drift during the first few hundred days of operation. The reason for this drift is not yet fully understood.
Future plans are to improve the system simulator and automatic calibration.
The system is linked to the plant computer through a gateway processor. Core predictions of soluble boron, rod position and axial offset for load rejection, power ramps and power coefficient measurement test were compared to actual measured data with very good agreement. Questions and discussion were on the core monitor methodology and data signal checking and validation. To better support customer needs and applications, the system was divided into three operational levels. The OLM level provides the base level of core monitor and analysis capability without requiring any Tech Spec changes.