Diagnosis of Measuring Systems Using Cluster Analysis Applied to Hydrostatic Water Level Measurement

Abstract

For a continuous monitoring, control, and diagnosis of high transient technical processes in safety-related systems as Nuclear Technology it is necessary to provide the best knowledge about the actual state of process. Especially the supervision of water level within pressure vessels with boiled water-steam mixture (pressuriser, steam generator, reactor pressure vessel) during operational and accidental transient processes is very important. A diagnosis system is proposed, which is subdivided in two components, a part for fault detection and a part for fault identification. The diagnosis component for fault detection using cluster analysis is described. The procedure of cluster analysis is demonstrated. The results of fault diagnosis using new validity functions are presented for a Blow Down Experiment at our pressuriser test facility.