Investigation of WWER-1000 vibrodiagnostics characteristics in operation conditions

Noise experiment was conducted at the WWER-1000 reactor of the Kalinin NPP with the purpose of investigating the special characteristics of the noises of three types of transducers. Noise signals of three ionization chambers, three transducers of pressure pulsation and fourteen in-core direct charge detectors were fixed by 20-channel recording system. Analysis of reactivity and local effects, caused by of the reactor vessel and fuel assemblies of various terms of their utilization was performed on the basis of the data obtained. Summary interpretation of the spectral characteristics peculiarities of the registered signals is given. 3 refs., 12 figs., 2 tabs