Distributed temperature monitoring for liquid sodium leakage detection using OFDR-based Rayleigh backscattering

E. Boldyreva (1) , R. Cotillard (1) , G. Laffont (1) , P. Ferdinand (1) , D. Cambet (2) , J. -P. Jeannot (2) , P. Charvet (2) , S. Albaladejo (2) , G. Rodriguez (2)

1 LCFO - Laboratoire Capteurs Fibres Optiques
2 DTN - Département Technologie Nucléaire

For the first time, a gold coated single mode optical fiber has been used to detect a liquid sodium leakage on a pipe of secondary circuit pipe mock-up of nuclear fast reactor (Gen IV) by means of Optical Frequency Domain Reflectometry-based on Rayleigh backscattering. During 150 min of the experiment we were able to detect and monitor the evolution of a liquid sodium leakage on the surface of the pipe.

Keywords: Optical Fiber Sensor; OFDR; Rayleigh backscattering; leakage detection; liquid sodium; fast reactor

Domains: Physics [physics]; Physics [physics]; Instrumentation and Detectors [physics.ins-det]; Physics [physics]; Physics [physics]; Optics [physics.optics]; Physics [physics]; Nuclear Experiment [nucl-ex]

E. Boldyreva, R. Cotillard, G. Laffont, P. Ferdinand, D. Cambet, et al.. Distributed temperature monitoring for liquid sodium leakage detection using OFDR-based Rayleigh backscattering. 23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS, Jun 2014, Santander, Spain. pp.91576N, ⟨10.1117/12.2059531⟩. ⟨cea-01828512⟩