Research on pitting corrosion of steam generator heat transfer tubes based on acoustic emission
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S. Hou
Abstract
Corrosion of steam generator heat transfer tubes (SGHTT) is one of the important problems which affect safety operation of nuclear power plants (NPP), and the hazard of pitting corrosion of heat transfer tubes is the most serious. With an acoustic emission device, the signals during a corrosion test on SGHTT were collected and analyzed, and the corrosion points in the tubes were located accurately. The results show that pitting corrosion of heat transfer tubes has passed through three periods in its development: expansion phase, stationary phase and rapid developing phase. The corrosion damage of HTT can be found earlier with acoustic emission than any other non-destructive testing methods. Acoustic emission can be used for on-line and real-time monitoring of the safety and operation of the steam generator and has therefore a great significance.
Kurzfassung
Korrosion bei Wärmeübertragungsrohren von Dampferzeugern (SGHTT) ist eines der wichtigen Probleme, die den sicheren Betrieb von Kernkraftwerken beeinträchtigen und die Gefahr des Lochfraßes bei Wärmeübertragungsrohren ist besonders ernst. Mit Hilfe eines Schallemissionsgerätes wurden Signale während eines SGHTT Korrosionstests gesammelt und analysiert und die Lage der Korrosionspunkte in den Rohren wurde genau bestimmt. Die Ergebnisse zeigen, dass der Lochfraß bei Wärmeübertragungsrohren in seiner Entwicklung drei Phasen durchläuft: Expansionsphase, stationäre Phase und schnelle Entwicklungsphase. Der Korrosionsschaden bei Wärmeübertragungsrohren kann mit Hilfe der Schallemission früher gefunden werden mit zerstörungsfreien Testverfahren. Mit Hilfe der Schallemission kann die Sicherheit und der Betrieb von Dampfgeneratoren on-line und in Real-time überwacht werden. Die Schallemission ist deshalb von großer Bedeutung.
References
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© 2010, Carl Hanser Verlag, München
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Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Technical Contributions/Fachbeiträge
- Integrated online condition monitoring system for nuclear power plants
- Performance analysis of 233U for fixed bed nuclear reactors
- 3D thermal hydraulic simulation of the hot channel of a typical material testing reactor under normal operation conditions
- Analysis of the processes in the target cooling system of the W7-X fusion experiment
- Nuclear model calculation on charged particle induced reactions to produce 85Sr for diagnostic and endotherapy
- Neutronic and burn-up calculations of heterogeneous Thorium/Uranium fuel in pressurized water reactors
- Research on pitting corrosion of steam generator heat transfer tubes based on acoustic emission
- Application of the Chebyshev polynomial (TN and UN) approximation to reflected slab geometry in the neutron transport equation and computation of critical half thicknesses
- UN approximation to critical slab problem for one-speed neutrons with isotropic, forward and backward scattering
- The albedo problem for pure-quadratic anisotropic scattering with İnönü scattering
- Technical Notes/Technische Mitteilungen
- Targetry of Y2O3 on a copper substrate for the non-carrier-added 89Zr production via 89Y(p, n)89Zr reaction
