Characteristics of Adaptiveness and Self-Organizing as Applied to the Non Linear Nuclear Systems

  • Kohyu Fukunishi


Supervising a operating nuclear reactor accurately with as short as time delay as possible is becoming more important as the demands increase for operating safety. The non linear and non stationary phenomena in a reactor may be one of the technical barriers to build a dynamic model permitting supervision and control. It appears that the characteristics of adaptiveness and self-organizing could extend the applicability of the conventional linear model to non linear and non stationary dynamics. The autoregressive (AR) and the adaptive digital filter (ADF) modeling techniques have been introduced for this study. The ADF is simple enough to permit real time modeling and can respond to non stationary and non linear state variations, but the AR technique needs complex time consuming computation. Application of ADF to anomaly detection and diagnosis of nuclear systems is discussed. Further, the stability monitoring method is discussed. Both of these have been confirmed by feasibility studies. Finally, adaptiveness of the reactor control method is discussed to assure its usefulness for operating efficiency.


Innovation Process Anomaly Detection Noise Analysis Nuclear System Decay Ratio 
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Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Kohyu Fukunishi
    • 1
  1. 1.Advanced Research LaboratoryHitachi Ltd.Kokubunji, TokyoJapan

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