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Title: Acoustic emission signal processing technique to characterize reactor in-pile phenomena

Existing and developing advanced sensor technologies and instrumentation will allow non-intrusive in-pile measurement of temperature, extension, and fission gases when coupled with advanced signal processing algorithms. The transmitted measured sensor signals from inside to the outside of containment structure are corrupted by noise and are attenuated, thereby reducing the signal strength and the signal-to-noise ratio. Identification and extraction of actual signal (representative of an in-pile phenomenon) is a challenging and complicated process. In the paper, empirical mode decomposition technique is utilized to reconstruct actual sensor signal by partially combining intrinsic mode functions. Reconstructed signal will correspond to phenomena and/or failure modes occurring inside the reactor. In addition, it allows accurate non-intrusive monitoring and trending of in-pile phenomena.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Human Factors, Controls, and Statistics, Idaho National Laboratory, Idaho Falls, ID 83415 (United States)
  2. Nuclear Science and Technology Directorate, Idaho National Laboratory, Idaho Falls, ID 83415 (United States)
  3. Department of Fuel Performance and Design, Idaho National Laboratory, Idaho Falls, ID 83415 (United States)
Publication Date:
OSTI Identifier:
22391210
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1650; Journal Issue: 1; Conference: 41. Annual Review of Progress in Quantitative Nondestructive Evaluation, Boise, ID (United States), 20-25 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONTAINMENT; DATA PROCESSING; EMISSION; FAILURES; IN PILE LOOPS; MONITORING; NOISE; NONDESTRUCTIVE TESTING; REACTOR MONITORING SYSTEMS; REACTORS; SENSORS; SIGNALS; SIGNAL-TO-NOISE RATIO