Nuclear power plant prestressed concrete containment vessel structure monitoring during integrated leakage rate test using three kinds of fiber optic sensors

Kaixing Liao; Jinke Li; Xianglong Kong; Changsen Sun; Xuefeng Zhao

doi:10.1117/12.2259760

5 April 2017 Nuclear power plant prestressed concrete containment vessel structure monitoring during integrated leakage rate test using three kinds of fiber optic sensors

Kaixing Liao, Jinke Li, Xianglong Kong, Changsen Sun, Xuefeng Zhao

Author Affiliations +

Proceedings Volume 10170, Health Monitoring of Structural and Biological Systems 2017; 1017034 (2017) https://doi.org/10.1117/12.2259760
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

After years of operation, the safety of the prestressed concrete containment vessel (PCCV) structure of Nuclear Power Plant (NPP) is an important aspect. In order to detect the strength degradation and the structure deformation, several sensors such as vibrating wire strain gauge, invar wires and pendulums were installed in PCCV. However, the amounts of sensors above are limited due to the cost. Due to the well durability of fiber optic sensors, three kinds of fiber optic sensors were chosen to install on the surface of PCCV to monitor the deformation during Integrated Leakage Rate Test (ILRT). The three kinds of fiber optic sensors which had their own advantages and disadvantages are Fiber Bragg Grating (FBG), white light interferometry (WLI) and Brillouin Optical Time Domain Analysis (BOTDA). According to the measuring data, the three fiber optic sensors worked well during the ILRT. After the ILRT, the monitoring strain was recoverable thus the PCCV was still in the elastic stage. If these three kinds of fiber optic sensors are widely used in the PCCV, the unusual deformations are easier to detect. As a consequence, the three fiber optic sensors have good potential in the structure health monitoring of PCCV.

Citation Download Citation

Kaixing Liao, Jinke Li, Xianglong Kong, Changsen Sun, and Xuefeng Zhao "Nuclear power plant prestressed concrete containment vessel structure monitoring during integrated leakage rate test using three kinds of fiber optic sensors", Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 1017034 (5 April 2017); https://doi.org/10.1117/12.2259760

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KEYWORDS

Fiber optics sensors

Fiber Bragg gratings

Sensors

Erbium

Fiber optics

Temperature metrology

Civil engineering

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