0
Research Papers

Characterization of Thermal Striping in Liquid Sodium With Optical Fiber Sensors

[+] Author and Article Information
Matthew Weathered

Engineering Physics,
University of Wisconsin-Madison,
1500 Engineering Drive,
Madison, WI 53715
e-mail: weathered@wisc.edu

Jordan Rein

Engineering Physics,
University of Wisconsin-Madison,
1500 Engineering Drive,
Madison, WI 53715
e-mail: jdrein@wisc.edu

Mark Anderson

Engineering Physics,
University of Wisconsin-Madison,
1500 Engineering Drive,
Madison, WI 53715
e-mail: manderson@engr.wisc.edu

Paul Brooks

Engineering Physics,
University of Wisconsin-Madison,
1500 Engineering Drive,
Madison, WI 53715
e-mail: pwbrooks@wisc.edu

Bryan Coddington

Engineering Physics,
University of Wisconsin-Madison,
1500 Engineering Drive,
Madison, WI 53715
e-mail: bryan.coddington@wisc.edu

Manuscript received January 11, 2017; final manuscript received June 12, 2017; published online July 31, 2017. Assoc. Editor: Dmitry Paramonov.

ASME J of Nuclear Rad Sci 3(4), 041003 (Jul 31, 2017) (9 pages) Paper No: NERS-17-1004; doi: 10.1115/1.4037118 History: Received January 11, 2017; Revised June 12, 2017

This study characterized the magnitude, spatial profile, and frequency spectrum of thermal striping at a junction using a novel sodium-deployable optical fiber temperature sensor. Additionally, this study revealed for the first time the capability of performing cross correlation velocimetry (CCV) with an optical fiber to acquire fluid flow rates in a pipe. Optical fibers were encapsulated in stainless steel capillary tubes with an inert cover gas for high-temperature sodium deployment. Plots of temperature oscillation range as a function of two-dimensional space highlighted locations prone to mechanical failure for particular flow momentum ratios. The effect of inlet sodium temperature differential and bulk flow rate on thermal striping behavior was also explored. The power spectral density (PSD) revealed that the striping temperature oscillations occurred at frequencies ranging from 0.1 to 6 Hz. Finally, the bulk flow rate of liquid sodium was calculated from thermal striping's periodic temperature oscillations using cross correlation velocimetry for flow rates of 0.25–5.74 L/min.

Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Encapsulation of optical fiber in capillary for high-temperature system deployment

Grahic Jump Location
Fig. 2

University of Wisconsin-Madison sodium loop schematic

Grahic Jump Location
Fig. 3

Thermal striping 90-deg junction geometry

Grahic Jump Location
Fig. 4

Calibrating EM flowmeters in diagnostic loop with Coriolis flowmeter. Calculated uncertainty for EM flowmeter reading: 3.65%. Uncertainty for Coriolis flowmeter from manufacturer: 0.2%.

Grahic Jump Location
Fig. 5

Flow categories illustrated for 90-deg junction

Grahic Jump Location
Fig. 6

Optical fiber temperature versus time data at two gauge locations

Grahic Jump Location
Fig. 7

Cross correlation of gauges with respect to reference gauge

Grahic Jump Location
Fig. 8

Categorization of thermal striping at junction, tests 1–9. Contour plots depicting temperature range at various momentum ratios.

Grahic Jump Location
Fig. 9

Contour plots depicting temperature range at various sodium stream temperature differentials with a constant momentum ratio of ∼0.7, tests 10–15

Grahic Jump Location
Fig. 10

Maximum temperature range versus sodium stream temperature differential, tests 10–15

Grahic Jump Location
Fig. 11

Maximum normalized temperature range versus Reynolds number, tests 16–37

Grahic Jump Location
Fig. 12

Fiber A1 normalized temperature difference from mean versus length versus time, test 4

Grahic Jump Location
Fig. 13

PSD of fibers A1, A2, and A3, test 4

Grahic Jump Location
Fig. 14

Autocorrelation of optical fiber A1 gauge at maximum temperature oscillations, test 4

Grahic Jump Location
Fig. 15

Cross correlation velocimetry flow rate as a function of electromagnetic flow meter reading

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In