Table of Contents
Sensors, Volume 19, Issue 1 (January-1 2019) – 217 articles
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Cover Story (view full-size image) An electrical penetration assembly (EPA), which provides a pressure barrier for the containment [...] Read more. An electrical penetration assembly (EPA), which provides a pressure barrier for the containment structure in nuclear power plants, is a mismatch metal-to-glass sealing structure. An important factor for maintaining hermeticity of electrical penetration assembly is the residual stress in the sealing glass, which is generated during the EPA sealing process. A novel method to investigate and optimize the sealing process of EPA, based on a fiber Bragg grating (FBG) sensor, is proposed in this paper. The temperature change during the heating process was measured by Bragg wavelength shift. After the sealing glass solidified and bonded well with FBG, the residual stress was determined and obtained by the sensor. Based on temperature and residual stress measurements, the FBG was found to be feasible for application in the manufacturing process of equipment used in nuclear power plants. View this paper.