Detection of local sodium boiling in a simulated LMFBR fuel subassembly

H. Inujima*, T. Ogino, K. Haga, Y. Kikuchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Out-of-pile experiments were carried out to study the feasibility of the local sodium boiling detection by use of temperature, flow and acoustic noises. The studies showed that the temperature fluctuation transferred the information of local sodium boiling to the end of the bundle, but little to the outlet. A new anomaly detection method, which used the algorithm of whiteness test of the residual time series data of autoregressive model, especially using flow fluctuation, was effective detecting the anomaly such as local sodium boiling. On the other hand, acoustic noises with local sodium boiling became much higher than the background such as the mechanical and flow noises. A waveguide method, which was utilized for the present experiments, was useful for the boiling detection.

Original languageEnglish
Pages (from-to)107-121
Number of pages15
JournalProgress in Nuclear Energy
Issue numberC
Publication statusPublished - 1982
Externally publishedYes


  • Sodium boiling
  • acoustic noises
  • anomaly detection method
  • autoregressive model
  • flow fluctuation
  • out-of-pile experiments
  • temperature fluctuation

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Waste Management and Disposal


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