Feasibility study of lmfbr local core anomaly detection by use of temperature and flow fluctuations

Takamichi Ogino, Hiroshi Inujima, Kazuo Haga

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A series of experiments on LMFBR local core accidents were carried out in an out-of-pile sodium test loop. In the experiments were used 37-and 61-pin bundle test sections which simulated fuel subassemblies. Throughout these experiments temperature and flow fluctuation signals were measured by thermocouples and by an eddy-current type flowmeter that serve to develop an anomaly detection method with high sensitivity. The experimental results indicate that flow fluctuation at the outlet could be more effectively used for the detection of a large local boiling than temperature fluctuation and that a burst type single cladding failure could be detected by use of the flow fluctuation. We proposed a real time anomaly detection algorithm based on the whiteness test for the residual random process. A study was made on the relation between the algorithm and the spectral error measure and its performance. It shows the applicability of the method to a real time system and the effective features of the algorithm.

Original languageEnglish
Pages (from-to)172-186
Number of pages15
JournalJournal of Nuclear Science and Technology
Issue number3
Publication statusPublished - 1984 Mar
Externally publishedYes


  • Anomaly detection
  • Cladding failure detection
  • Fuel subassembly
  • Local boiling detection
  • Local core accident
  • Residual random process
  • Sodium loop
  • Spectral error measure
  • Temperature ñuctuation
  • Whiteness test
  • ñow fluctuation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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