NEUTRON FLUX MONITOR APPARATUS OF NUCLEAR OF NUCLEAR REACTOR

摘要

PURPOSE:To achieve the enhancement of noise resistance and the reduction of the number of cables and to simultaneously measure high response and an average change by applying filtering processing to the output signal of each neutron detector and successively selecting the same to digitally converting the same. CONSTITUTION:The output of a nuclear reactor during operation is monitored upon the reception of the respective output signals from a plurality of the neutron detectors 1(1-1 - 1-n) arranged in a reactor core. At this time, the output signals of the detectors are respectively subjected to filtering processing by the first filter circuits 5 (5-1 - 5-n) to remove noise and successively selected by a signal selection means 6 to be digitally converted by an A/D converter 13. These signals are serially transmit ted by a transmission means 14 and reproduced at a speed same to or more than that of the means 6 by a high speed signal reproducing means 18 to be enhanced in response and the neutron flux in the reactor core is monitored by an operational monitor apparatus 22. At the same time, the signals are subjected to filtering processing by the second filter circuit 23 in an average value calculation means 19 and the average value of outputs is calculated by an operational monitor apparatus 24.