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Incandescent Particle Characterization Emitted by a Cut-Off Grinder During Decommissioning Operations for Evaluating Filters Degradation

[+] Author Affiliations
Pierre Marchal, Emmanuel Porcheron

Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Saclay, France

Gérard Grehan

CNRS, Rouen, France

Luc Lafanechere, Jonathan Walter

EDF, Lyon, France

Paper No. ICONE21-15353, pp. V006T16A010; 7 pages
doi:10.1115/ICONE21-15353
From:
  • 2013 21st International Conference on Nuclear Engineering
  • Volume 6: Beyond Design Basis Events; Student Paper Competition
  • Chengdu, China, July 29–August 2, 2013
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5583-6
  • Copyright © 2013 by ASME

abstract

The use of mechanical or thermal cutting tools in decommissioning of nuclear facilities generates a lot of incandescent particles. These particles may represent a risk of deterioration of the containment barriers associated with a potential risk of fire starting.

The aim of the study is to characterize the incandescent particles emitted by a wheel grinder (in terms of temperature, diameter and velocity) and to follow those parameters all along their path from their emission to their impact on the air filter. The characteristics of particles correlated with a possible loss of filter efficiency should identify the destructing particles for the filter. All the measurement techniques used to characterize the incandescent particles are presented in this article. Particles are characterized in terms of aerodynamic diameter with the help of an Aerodynamic Particle Sizer (APS). The particle velocity is measured with laser velocimetry techniques. An adaptation of a commercial pyrometer is achieved to measure the inflight particles temperature. All of these techniques are being implemented on an experimental facility which reproduces representative conditions of the cutting processes realized during dismantling operations.

Copyright © 2013 by ASME

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