A multiscale data reconciliation approach for sensor fault detection

VS Yellapu, W Zhang, V Vajpayee, X Xu - Progress in Nuclear Energy, 2021 - Elsevier
When used separately on the sensor data of the processes like nuclear reactors, the data
reconciliation with fault detection and isolation strategy gives noise-corrupted estimates, and …

Application of data reconciliation for fault detection and isolation of in-core self-powered neutron detectors using iterative principal component test

VS Yellapu, AP Tiwari, SB Degweker - Progress in Nuclear Energy, 2017 - Elsevier
In-core neutron detectors are used in large nuclear reactors for the purpose of acquiring
knowledge about the spatial flux distribution, which helps in control, monitoring and …

Online fault detection and isolation in advanced heavy water reactor using multiscale principal component analysis

VS Yellapu, V Vajpayee… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
Signals from sensors placed at different locations are used for control and protection
purposes in a nuclear reactor. It also requires in-service fault detection and isolation (FDI) for …

Clustering of self powered neutron detectors: combining prompt and slow dynamics

RA Razak, M Bhushan, MN Belur… - … on Nuclear Science, 2014 - ieeexplore.ieee.org
The focus of this work is on clustering Self Powered Neutron Detectors (SPNDs) with
different dynamic characteristics into smaller groups, with each group containing highly …

Application of data reconciliation and fault detection and isolation of ion chambers in Advanced Heavy Water Reactor

VS Yellapu, AP Tiwari, SB Degweker - Annals of Nuclear Energy, 2015 - Elsevier
In a nuclear reactor, eg Advanced Heavy Water Reactor, a large number of neutron flux
detectors are used for measurement of core flux based on which different monitoring, control …

Variance correction principal component analysis—gross error detection with serially correlated data

R Jeyanthi, S Devanathan - Measurement Science and …, 2022 - iopscience.iop.org
Process industries have complex measurement systems set up to measure process
variables for control, dynamic optimization, online diagnostics, and real-time monitoring …

Online fault detection and diagnosis of in-core neutron detectors using generalized likelihood ratio method

YV Sagar, AK Mishra, AP Tiwari… - IEEE Transactions on …, 2015 - ieeexplore.ieee.org
Vanadium self-powered neutron detectors (VSPNDs) have been proposed to be used in the
Advanced Heavy Water Reactor for flux mapping purposes. However, response of VSPNDs …

Cluster statistics based normalization for online fault diagnosis of self-powered neutron detectors

S Chatterjee, SK Surwase, M Bhushan… - … and Control (ICICIC), 2017 - ieeexplore.ieee.org
Self Powered Neutron Detector (SPND) is a widely used sensor for measuring neutron flux
in a nuclear reactor. In this work we propose a novel cluster statistics based normalization …

Adaptive, online models to detect and estimate gross error in SPNDs

A Bhattacharyya, V Yogi, S Singla… - 2017 Indian Control …, 2017 - ieeexplore.ieee.org
In-core flux measurement is critical for monitoring and power regulation of a large core
nuclear reactor. Self Powered Neutron Detectors (SPNDs) are used for measuring the …

A gross error detection method based on 3MAD–GRW–MMMD

D Xiao, J Bao, B Zhang - Chemometrics and Intelligent Laboratory Systems, 2015 - Elsevier
Due to various reasons, there are inevitably gross errors in the data collected in the field.
Gross errors need to be detected for modeling data to keep soft-sensing model accurate …