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Proceedings Paper

Nickel plating of FBG strain sensors for nuclear applications
Author(s): Marcus Perry; Pawel Niewczas; Michael Johnston; John Mackersie
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Paper Abstract

We present a method for plating FBG strain sensors with a strongly-bonded, hermetic nickel layer, without exposure of the fiber to corrosive environments. A 1μm thick, highly adhesive chrome layer is deposited onto bare fibers via evaporation. Addition of an inert and electrically conductive gold layer then allows the fiber to be electroplated with a 50-100μm nickel layer. Finite element models have confirmed that nickel plated FBG sensors can be brazed into steel structures and used to monitor local strain and temperature. Embedding gratings that are temperature and radiation resistant will be particularly applicable to the structural health monitoring of steel prestressing tendons used in the concrete containments of nuclear power plants and other safety-significant structures.

Paper Details

Date Published: 18 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77538G (18 May 2011); doi: 10.1117/12.885931
Show Author Affiliations
Marcus Perry, Univ. of Strathclyde (United Kingdom)
Pawel Niewczas, Univ. of Strathclyde (United Kingdom)
Michael Johnston, Univ. of Strathclyde (United Kingdom)
EDF Energy plc (United Kingdom)
John Mackersie, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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