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  • 1 Homi Bhabha National Institute, Mumbai 400094, India; Electronics Division, Bhabha Atomic Research Centre, Mumbai 400085, India. Electronic address: suryakantg@hbni.ac.in.
  • 2 Nuclear Power Corporation of India Limited, Mumbai 400094, India.
  • 3 Bharatiya Nabhikiya Vidyut Nigam Limited, kalpakkam 600008, India.
  • 4 Homi Bhabha National Institute, Mumbai 400094, India; Electronics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
  • 5 EE Department, Indian Institute of Technology (IIT) Bombay, Mumbai 400076, India.
  • 1 Homi Bhabha National Institute, Mumbai 400094, India; Electronics Division, Bhabha Atomic Research Centre, Mumbai 400085, India. Electronic address: suryakantg@hbni.ac.in.
  • 2 Nuclear Power Corporation of India Limited, Mumbai 400094, India.
  • 3 Bharatiya Nabhikiya Vidyut Nigam Limited, kalpakkam 600008, India.
  • 4 Homi Bhabha National Institute, Mumbai 400094, India; Electronics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
  • 5 EE Department, Indian Institute of Technology (IIT) Bombay, Mumbai 400076, India.
  • Sensor real-time monitoring is an indispensable to achieve reliable plant operation along with stricter safety and environmental measures. This paper presents a statistical algorithm for sensors time-varying incipient fault detection and isolation. The proposed approach formulates the fault detection index and fault signature using the extended Kalman filter. Algorithm relaxes assumption on a monitored system stability and a priori knowledge of the fault profile. Further, fault decision statistics has been devised using Kullback-Leibler Divergence (KLD) and mixed with an Exponential Weighted Moving Average (EWMA) control chart. Pressurized water reactor nuclear power plant temperature and neutron flux sensors incipient fault detection and isolation have been demonstrated to illustrate the effectiveness of proposed methodology. Chen H, Jiang B, Lu N. Chen H, et al. ISA Trans. 2018 Aug;79:127-136. doi: 10.1016/j.isatra.2018.05.007. Epub 2018 May 22. ISA Trans. 2018. PMID: 29801923 Aggoune L, Chetouani Y, Raïssi T. Aggoune L, et al. ISA Trans. 2016 Jul;63:394-400. doi: 10.1016/j.isatra.2016.03.006. Epub 2016 Mar 25. ISA Trans. 2016. PMID: 27020311 Hu C, Lin H, Li Z, He B, Liu G. Hu C, et al. Entropy (Basel). 2018 Feb 10;20(2):116. doi: 10.3390/e20020116. Entropy (Basel). 2018. PMID: 33265207 Free PMC article. Goelles T, Schlager B, Muckenhuber S. Goelles T, et al. Sensors (Basel). 2020 Jun 30;20(13):3662. doi: 10.3390/s20133662. Sensors (Basel). 2020. PMID: 32629897 Free PMC article. Review. Scarfone AM, Matsuzoe H, Wada T. Scarfone AM, et al. Entropy (Basel). 2018 Jun 5;20(6):436. doi: 10.3390/e20060436. Entropy (Basel). 2018. PMID: 33265526 Free PMC article. Review.