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Analysis of irreversible circulation in reactor noise
Authors:Kuniharu Kishida  Naoyuki Yamada  Tamotsu Sekiya  Masahiko Utsuro  Yasuhiro Kimura
Affiliation:

Department of Nuclear Engineering, Faculty of Engineering, Osaka University Yamadakami, Suita-shi, Osaka, Japan

Research Reactor Institute, Kyoto University Kumatori-cho, Sennan-gun, Osaka, Japan

Abstract:A new parameter greek small letter alpha is proposed as a statistical variable of multi-dimensional reactor noise analysis. It indicates circulation in a space of state variables, while the well-known variance σ represents the spread of distribution of fluctuations. The pair of quantities σ and greek small letter alpha are minimum necessary integral indices to characterize any power spectral density and are convenient for data retrieval. The greek small letter alpha is less sensitive to the effect of low-cut filter than σ. The analysis of experimental data by using greek small letter alpha is demonstrated and compared with the results of theoretical treatment.
Keywords:
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