Development of reactor core surveillance system for PARR

A computer based surveillance system has been developed at PARR for an early detection and identification of any core abnormality. The system acquires various plant signals monitoring the reactor core condition and performs the frequency analysis of the fluctuations in these signals. It calculates the root mean square values of signal fluctuations, the signal power as a function of frequency or power spectral density and the auto and cross correlation functions. The system has already been used at PARR for the detection of control rod vibration in the reactor. In this report the system application for determining the dynamic performance of locally fabricated reflector elements in the core is described. (orig./A.B.). 6 figs., 5 refs