LOCALIZATION OF A LOCAL POWER FLUX INCREASE SOURCE IN THE NUCLEAR REACTOR USING THE SIGNAL OF THE UNDER-CORE NEUTRON DETECTORS
The algorithm of localization of an irregular neutron flux source in the core of the nuclear reactor is suggested. The algorithm allows determining the position of the neutron flux source using the signals of the three nearest to the source detectors. The detectors are fission chambers distributed under the bottom of the core. Solution is suggested for a two-dimension approximation. The algorithm is using the experimental observations describing a signal of a detector as a function of a distance to the source of irregular power flux. From the geometric problem a function describing correspondence of a detector signal as a function of the distance to the source of irregular power flux and a function obtained in the previous experiments is evaluated. The algorithm was implemented as a program written in C++. The results of the experiments carried out on the reactor in 2007-2008 were used as input data to estimate the precision of the suggested algorithm. During those experiments in 2007-2008 local increases of power flux were organized and the detectors signals were registered. The possibility of applying of the suggested algorithm at the control systems of the reactor is shown.