Analysis of pipe thickness reduction according to pH in FAC facility with In situ ultrasonic measurement real time monitoring
| Autor: | Dong-Jin Kim, Se-Beom Oh, Kyung Mo Kim, Jong-Yeon Lee, Jongbeom Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Carbon steel System of measurement Thickness monitoring Flow accelerated corrosion (FAC) education TK9001-9401 Ultrasonic thickness measurement engineering.material law.invention Corrosion Nuclear Energy and Engineering law High-temperature pipe Flow-accelerated corrosion Fluid dynamics engineering Waveguide Nuclear engineering. Atomic power Ultrasonic sensor Composite material |
| Zdroj: | Nuclear Engineering and Technology, Vol 54, Iss 1, Pp 186-192 (2022) |
| ISSN: | 1738-5733 |
| Popis: | Flow accelerated corrosion (FAC) is a type of pipe corrosion in which the pipe thickness decreases depending on the fluid flow conditions. In nuclear power plants, FAC mainly occurs in the carbon steel pipes of a secondary system. However, because the temperature of a secondary system pipe is over 150 °C, in situ monitoring using a conventional ultrasonic non-destructive testing method is difficult. In our previous study, we developed a waveguide ultrasonic thickness measurement system. In this study, we applied a waveguide ultrasonic thickness measurement system to monitor the thinning of the pipe according to the change in pH. The Korea Atomic Energy Research Institute installed FAC-proof facilities, enabling the monitoring of internal fluid flow conditions, which were fixed for ~1000 h to analyze the effect of the pH. The measurement system operated without failure for ~3000 h and the pipe thickness was found to be reduced by ~10% at pH 9 compared to that at pH 7. The thickness of the pipe was measured using a microscope after the experiment, and the reliability of the system was confirmed with less than 1% error. This technology is expected to also be applicable to the thickness-reduction monitoring of other high-temperature materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|