Advertisement

Development of Advanced Core Noise Monitoring System for a Boiling Water Reactor

  • Michitsugu Mori
  • Shigeru Kanemoto
  • Mitsuhiro Enomoto
  • Shigeo Ebata
Part of the Power Systems book series (POWSYS)

Abstract

For an efficient nuclear power plant operation, advanced core design is very important. However, advances in design may result in approaching unexplored areas where unforeseen events are increasingly common. The purpose of this paper is to describe a BWR core noise monitoring system for addressing core anomaly problems in future advanced core operation. To monitor in-core status from a limited number of signals, we introduce various new algorithms to compensate for a lack of information. We demonstrate that up-to-date signal processing technologies, such as independent component analysis, nonlinear principal component regression, factor analysis and neural network, are effective tools for core monitoring. Also, the combination of the first principle or design model and the empirical fitting model is applied to estimate unobserved in-core state variables. Several concrete examples, such as stability monitoring, reactivity coefficient estimation, core flow estimation and in-core signal validation, are shown based on long-term monitoring experiences in real BWR plants. Through these examples, we demonstrate that the core noise monitoring system is a general platform for providing a variety of monitoring tools to meet the requirements of an advanced core operation strategy.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Kanemoto S, Enomoto M, Ando Y, Namba H, Ebata S, Takagi A, Hattori T, Kitamura N, Yoshizawa A (1988) Development of an on-line reactor stability monitoring system in a boiling water reactor, Progress in Nuclear Energy (SMORN-5) 21: 745–752CrossRefGoogle Scholar
  2. Takeuchi Y, Takigawa Y, Miyamoto S (1999) A Study on Regional Stability Analysis Methodology with a One-Point Neutron Kinetics Model, Nuclaer Technology 128: 257–267Google Scholar
  3. Yamashita K, Anegawa T, Miyamoto S, Kanemoto S, Takeuchi Y, Enomoto M (1997) Proceedings of annual meeting of Japan Atomic Energy Society, E52 (in Japanese)Google Scholar
  4. Jutten C, Herault J (1991) Blind separation of sources, Signal Processing 24–1: 110Google Scholar
  5. Thawonmas R (2000) Computer Today 99–9:(in Japanese)Google Scholar
  6. Verdu G, Ginestar D, Munoz-Cobo J,L, Navarro J, Palomo M.J, Lansaker P, Conde J.M, Recio M, Sartori E (2001) Forsmark 1 & 2 BWR stability benchmark final report, NEAINSC/DOC(2001)2Google Scholar
  7. Kanemoto S, Enomoto M, Takeuchi Y, Ebata S, Konno H (2001) Proceedings of annual meeting of Japan Atomic Energy Society, F51 (in Japanese)Google Scholar
  8. Tamaoki T, Enomoto M, Kanemoto S, Ebata S, Chuman K, Hirose J (2000) Proceedings of fall meeting of Japan Atomic Energy Society, R51 (in Japanese)Google Scholar
  9. Tamaoki T, Enomoto M, Ebata S, Sugawara M, Hara T (2001) Proceedings of fall meeting of Japan Atomic Energy Society, H32 (in Japanese)Google Scholar
  10. Mori M, Kanemoto S, Enomoto M, Ebata S (1996) On-line estimation of local and total core flow rates by neutron noise analysis in BWR, Proceedings of INCORE96, Mito-shi, JAPAN: 145–155Google Scholar
  11. Mori M, Kanemoto S, Enomoto M, Ebata S (1997) Proceeding of Japan Atomic Society 39–9:788-(in Japanese)Google Scholar
  12. Stekelenburg AJC, van der Hagen THJJ (1993) Two phase flow monitoring by analysis of in-core neutron detector noise analysis, Ann. Nucl.Energy 20: 611–117CrossRefGoogle Scholar
  13. Uhrig RE (2000) Reviewing various types of intelligent systems for application to nuclear plants, International Topical Meeting on NPIC & HMIT 2000, Washington DC, November: 109–117Google Scholar
  14. Rasmussen B, Hines JW, Uhrig RE (2000) A novel approach to process modeling for instrument surveillance and calibration verification, International Topical Meeting on NPIC & HMIT 2000, Washington DC, November: 890–900Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Michitsugu Mori
    • 1
  • Shigeru Kanemoto
    • 2
  • Mitsuhiro Enomoto
    • 2
  • Shigeo Ebata
    • 2
  1. 1.Tokyo Electric Power CompanyTsurumi-ku, YokohamaJapan
  2. 2.Toshiba CorporationIsogo-ku, YokohamaJapan

Personalised recommendations