One Centimeter Spatial Resolution Temperature Measurements in a Nuclear Reactor Using Rayleigh Scatter in Optical Fiber

Author

Sang, Alex K. ; Froggatt, Mark E. ; Gifford, Dawn K. ; Kreger, Stephen T. ; Dickerson, Bryan D.

Author_Institution

Luna Technol., Luna Innovations, Inc., Blacksburg, VA

Volume

8

Issue

7

fYear

2008

fDate

7/1/2008 12:00:00 AM

Firstpage

1375

Lastpage

1380

Abstract

We present the use of swept wavelength interferometry for distributed fiber-optic temperature measurements in a nuclear reactor. The sensors consisted of 2-m segments of commercially available, single mode optical fibers. The interrogation technique is based on measuring the spectral shift of the intrinsic Rayleigh backscatter signal along the optical fiber and converting the spectral shift to temperature.

Keywords

Rayleigh scattering; backscatter; distributed sensors; fibre optic sensors; light interferometry; nuclear reactor instrumentation; reflectometry; spectral line shift; spectral methods of temperature measurement; temperature sensors; distributed fiber-optic temperature measurements; interrogation technique; intrinsic Rayleigh backscatter signal; nuclear reactor; optical frequency domain reflectometry; single mode optical fibers; spatial resolution temperature measurements; spectral shift; swept wavelength interferometry; Backscatter; Optical fiber sensors; Optical fibers; Optical interferometry; Optical scattering; Optical sensors; Rayleigh scattering; Spatial resolution; Temperature measurement; Wavelength measurement; Distributed sensing; Rayleigh scatter; nuclear; nuclear reactor; optical fiber; optical frequency domain reflectometry (OFDR); radiation; temperature;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2008.927247

Filename

4567496