Translator Disclaimer
14 February 2005 Flow-accelerated corrosion monitoring through advanced sensors
Author Affiliations +
Abstract
In order to successfully implement the extended-life operation plan of the nuclear power plant (NPP), predictive maintenance based on on-line monitoring of deteriorated components becomes highly important. Pipe wall-thinning is usually caused by Flow-Accelerated Corrosion (FAC) under the undesirable combination of water chemistry, flow velocity and material composition. In order to increase the confidence of understanding on underlying process, a multi-disciplinary approach has been adopted in this work. Here, we apply a combination of several advanced sensors, ranging from chemical electrodes to mechanical vibration sensors to monitor the thickness change of the elbow, which can be still economical option. Electrochemical Corrosion Potential (ECP) and pH are chosen as electrochemical parameters, the change of vibration mode, displacement, and etc. are chosen as mechanical parameters to monitor the wall thinning phenomena. Electrodes are developed for the on-line monitoring of pH and ECP. Vibration is considered as a promising candidate as a mechanical parameter. Various sensors are surveyed and some are chosen based on FEM analysis result, which shows the approximate vibration range according to the thickness change. Mechanical sensors need to be sensitive enough to detect small thickness change with adequate safety margin to a pipe rupture. A few sensors are suggested to detect vibration or displacement quantitatively. Fiber optic sensors are chosen for their non-contacting property, which is appropriate for the high temperature application. Accelerometer and capacitance gage are suggested for their applicability fit to the test purpose.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jung Taek Kim, Seung H. Seong, Cheol K. Lee, Sub Hur, Na Y. Lee, and Sang J. Lee "Flow-accelerated corrosion monitoring through advanced sensors", Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); https://doi.org/10.1117/12.578016
PROCEEDINGS
12 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Model For An Optical Fiber Ph Sensor
Proceedings of SPIE (April 01 1987)
Fiber optic hydrogen detection system
Proceedings of SPIE (December 09 1999)
Multipoint fiber-optic-based corrosion sensor
Proceedings of SPIE (May 16 2008)
NIR-PRFS fiber optic corrosion sensor
Proceedings of SPIE (April 12 1996)
Fiber-optic-based pH measurement in a geothermal brine
Proceedings of SPIE (March 01 1992)

Back to Top