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Sensors 2017, 17(6), 1377; doi:10.3390/s17061377

France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

1
National Radioactive Waste Management Agency (Andra), F-92298 Chatenay-Malabry, France
2
Laboratoire Hubert Curien CNRS UMR 5516, University of Lyon, F-42000 Saint-Etienne, France
3
XLIM Research Institute, UMR 7252 CNRS/University of Limoges, 123 Avenue Albert Thomas, F-87060, Limoges, France
*
Author to whom correspondence should be addressed.
Academic Editors: Nicole Jaffrezic-Renault and Gaelle Lissorgues
Received: 31 March 2017 / Revised: 27 April 2017 / Accepted: 4 May 2017 / Published: 13 June 2017
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in France 2016)

Abstract

This paper presents the state of the art distributed sensing systems, based on optical fibres, developed and qualified for the French Cigéo project, the underground repository for high level and intermediate level long-lived radioactive wastes. Four main parameters, namely strain, temperature, radiation and hydrogen concentration are currently investigated by optical fibre sensors, as well as the tolerances of selected technologies to the unique constraints of the Cigéo’s severe environment. Using fluorine-doped silica optical fibre surrounded by a carbon layer and polyimide coating, it is possible to exploit its Raman, Brillouin and Rayleigh scattering signatures to achieve the distributed sensing of the temperature and the strain inside the repository cells of radioactive wastes. Regarding the dose measurement, promising solutions are proposed based on Radiation Induced Attenuation (RIA) responses of sensitive fibres such as the P-doped ones. While for hydrogen measurements, the potential of specialty optical fibres with Pd particles embedded in their silica matrix is currently studied for this gas monitoring through its impact on the fibre Brillouin signature evolution. View Full-Text
Keywords: optical fibres; optical fibre sensors; Raman; Brillouin; Rayleigh scatterings; temperature; strain; radiation effects; hydrogen optical fibres; optical fibre sensors; Raman; Brillouin; Rayleigh scatterings; temperature; strain; radiation effects; hydrogen
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Delepine-Lesoille, S.; Girard, S.; Landolt, M.; Bertrand, J.; Planes, I.; Boukenter, A.; Marin, E.; Humbert, G.; Leparmentier, S.; Auguste, J.-L.; Ouerdane, Y. France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes. Sensors 2017, 17, 1377.

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