NEUTRON FLUX LEVEL MEASURING APPARATUS, NEUTRON FLUX LEVEL OPERATION DEVICE, AND NEUTRON FLUX LEVEL MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To quickly measure a neutron flux level by cancelling affect of noise.SOLUTION: According to an embodiment, a neutron flux level operation device 90 includes: an analog signal processing system 10 configured to amplify the AC section of a detector output signal from a neutron detector 2 and perform filtering processing to remove a high frequency component; a digitization processing system 20 configured to perform AD conversion of an output signal from the analog signal processing system 10 to a digital time series signal at a constant sampling period; a wavelet analysis system 30 configured to calculate a wavelet coefficient by discrete wavelet conversion using the digital time series signal; and a digital signal processing system 40 configured to calculate the mean square value of the wavelet coefficient to convert it into a neutron flux level value.