Fiber-optic Temperature Sensor Using a Silicone Oil and an OTDR

Title & Authors
Fiber-optic Temperature Sensor Using a Silicone Oil and an OTDR
Jang, Jae Seok; Yoo, Wook Jae; Shin, Sang Hun; Lee, Dong Eun; Kim, Mingeon; Kim, Hye Jin; Song, Young Beom; Jang, Kyoung Won; Cho, Seunghyun; Lee, Bongsoo;

Abstract
In this study, we developed a fiber-optic temperature sensor (FOTS) based on a silicone oil and an optical time domain reflectometer (OTDR) to apply the measurement of a coolant leakage in the nuclear power plant. The sensing probe of the FOTS consists of a silicone oil, a stainless steel cap, a FC terminator, and a single mode optical fiber. Fresnel reflection arising at the interface between the silicone oil and the single mode optical fiber in the sensing probe is changed by varying the refractive index of the silicone oil according to the temperature. Therefore, we measured the optical power of the light signals reflected from the sensing probe. The measurable temperature range of the FOTS using a Cu-coated silica fiber is from $\small{70^{\circ}C}$ to $\small{340^{\circ}C}$ and the maximum operation temperature of the FOTS is sufficient for usage at the secondary system in the nuclear power plant.
Keywords
Fiber-optic temperature sensor;Silicone oil;OTDR;Fresnel reflection;Coolant leakage;
Language
Korean
Cited by
1.
Silicon Oil-Based 2-Channel Fiber-Optic Temperature Sensor Using a Subtraction Method, Journal of Sensor Science and Technology, 2016, 25, 5, 344
References
1.
J. S. Kim, J. H. Kim, H. Y. Bae, C. Y. Oh, Y. Kim, K. S. Lee, and T. K. Song, "Welding Residual Stress Distributions for Dissimilar Metal Nozzle Butt Welds in Pressurized Water Reactors", The Transactions of the Korean Society for Energy Engineering, Vol. 36, No. 2, pp. 137-148, 2012.

2.
S. H. Shim, J. S. Song, K. B. Yoon, K. M. Hwang, T. E. Jin, and S. H. Lee, "A Study on Managing of Metal Loss by Flow-Accelerated Corrosion in the Secondary Piping of CANDU Nuclear Plants", The Transactions of the Korean Society of Mechanical Engineers, Vol. 11, No. 1, pp. 18-25, 2002.

3.
J. S. Song, H. Kim, and S. Lee, "A Study on Radioactive Source-term Assessment Method for Decommissioning PWR Primary System", The Transactions of the Korean Radioactive Waste Society, Vol. 12, No. 2, pp. 153-164, 2014.

4.
S. B. Shimanskii, B. P. Strelkov A. N. Anan'ev, A. M. Lyubishkin, T. Iijima, H. Mochizuki, Y. Kasai, K. Yokota, and J. Kanazawa, "Acoustic method of leak detection using high-temperature microphones", Atom. Energy+, Vol. 98, No. 2, pp. 89-96, 2005.

5.
D. S. Kupperman, T. N. Claytor, and R. Groenwald, "Acoustic leak detection for reactor coolant systems", Nuclear Engineering and Design, Vol. 86, No. 1, pp. 13-20, 1985.

6.
J. R. Zhao, X. G. Huang, W. X. He, and J. H. Chen, "High-resolution and temperature-insensitive fiber optic refractive index sensor based on Fresnel reflection modulated by Fabry-Perot interference", J. Lightwave Technol., Vol. 28, No. 19, pp. 2799-2803, 2010.

7.
C. L. Zhao, J. H. Li, S. Q. Zhang, Z. X. Zhang, and S. Z. Jin. "A simple Fresnel reflection-based optical fiber sensor for multipoint refractive index measurement using an AWG", IEEE Photonic. Tech. L., Vol. 25, No. 6, pp. 606-608, 2013.

8.
J. H. Chen and X. G. Huang, "Fresnel-reflection-based fiber sensor for on-line measurement of ambient temperature", Opt. Commun., Vol. 283, No. 9, 2010.

9.
H. I. Sim, W. J. Yoo, S. H. Shin, J. S. Jang, J. S. Kim, K. W. Jang, S. Cho, J. H. Moon, and B. Lee, "Real-time measurements of water level and temperature using fiber-optic sensors based on an OTDR", The Transactions of the Korean Institute of Electrical Engineers, Vol. 63, No. 9, pp. 1239-1244, 2014.

10.
W. J. Yoo, H. I. Sim, S. H. Shin, K. W. Jang, S. Cho, J. H. Moon, and B. Lee, "A fiber-optic sensor using an aqueous solution of sodium chloride to measure temperature and water level simultaneously", Sensors, Vol. 14, No. 10, pp. 18823-18836, 2014.

11.
J. Chen, and X. Huang, "Fresnel-reflection-based fiber sensor for on-line measurement of ambient temperature", Opt. Commun., Vol. 283, No. 9, pp. 1647-1677, 2010.

12.
K. R. Sohn, "Liquid sensor using refractive intensity at the end-face of a glass fiber connected to fiber-Bragg grating", Sensor. Actuat. A-Phys., Vol. 158, No. 2, pp. 193-197, 2010.

13.
H. Su, and X. G. Huang, "Fresnel-reflection-based fiber sensor for on-line measurement of solute concentration in solutions", Sens. Actuators B Chem., Vol. 126, No. 2, pp. 579-582, 2007.

14.
L. Yuan, L. Zhou, and W. Jin, "Long-gauge length embedded fiber optic ultrasonic sensor for large-scale concrete structures", Opt. Laser Technol., Vol. 36, No. 1, pp. 11-17, 2004.

15.
J. Yuan, C. Zhao, M. Ye, J. Kang, Z. Zhang, and S. Jin, "A Fresnel reflection-based optical fiber sensor system for remote refractive index measurement using an OTDR", Photonic sensors, Vol. 36, No. 10, pp. 1869-1874, 1995.