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Title: Optical coherence tomography for nondestructive evaluation of fuel rod degradation

Nuclear power plants regularly inspect fuel rods to ensure safe and reliable operation. Excessive corrosion can cause fuel failures which can have significant repercussions for the plant, including impacts on plant operation, worker exposure to radiation, and the plant's INPO rating. While plants typically inspect for fuel rod corrosion using eddy current techniques, these techniques have known issues with reliability in the presence of tenacious, ferromagnetic crud layers that can deposit during operation, and the nondestructive evaluation (NDE) inspection results can often be in error by a factor of 2 or 3. For this reason, alternative measurement techniques, such as Optical Coherence Tomography (OCT), have been evaluated that are not sensitive to the ferromagnetic nature of the crud. This paper demonstrates that OCT has significant potential to characterize the thickness of crud layers that can deposit on the surfaces of fuel rods during operation. Physical trials have been performed on simulated crud samples, and the resulting data show an apparent correlation between the crud layer thickness and the OCT signal.
Authors:
 [1] ; ;  [2] ;  [3]
  1. Electric Power Research Institute, 1300 West WT Harris Blvd., Charlotte, NC 28262 (United States)
  2. MetroLaser, Inc., 22941 Mill Creek Drive, Laguna Hills, CA 92653 (United States)
  3. AREVA, Inc., 3315 Old Forest Road, Lynchburg, VA 24501 (United States)
Publication Date:
OSTI Identifier:
22391218
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:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; COMPUTERIZED SIMULATION; CORRELATIONS; CORROSION; EDDY CURRENTS; FAILURES; FUEL RODS; IN-SERVICE INSPECTION; LAYERS; NONDESTRUCTIVE ANALYSIS; NUCLEAR FUELS; NUCLEAR POWER PLANTS; REACTOR OPERATION; RELIABILITY; THICKNESS; TOMOGRAPHY