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

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 d...

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Bibliographische Detailangaben
Hauptverfasser:	ITO DAIJIRO, KITAZONO HIDEYUKI, KONO SHIGEHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MEASUREMENT OF NUCLEAR OR X-RADIATION MEASURING NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR POWER PLANT NUCLEAR REACTORS PHYSICS REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING
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Beschreibung
Zusammenfassung:	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. 【課題】ノイズの影響を除去して、中性子束レベルの測定を迅速に行う。【解決手段】実施形態によれば、中性子束レベル演算装置９０は、中性子検出器２からの検出器出力信号の交流部分を増幅し、かつ高周波成分除去のフィルタリング処理を行なうアナログ信号処理系１０と、アナログ信号処理系１０からの出力信号を一定のサンプリング周期でディジタル時系列信号にＡＤ変換するディジタル化処理系２０と、ディジタル時系列信号を用いて離散ウェーブレット変換によってウェーブレット係数を算出するウェーブレット解析系３０と、ウェーブレット係数の二乗平均値を算出し中性子束レベル値に換算するディジタル信号処理系４０を備える。【選択図】図１