Lessons learned with vibration monitoring systems in German nuclear power plants
| Autor: | R. Sunder, A. Kolbasseff |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Computer science
business.industry Nuclear engineering Mode (statistics) Energy Engineering and Power Technology Condition monitoring Monitoring system Nuclear power Accelerometer Vibration Noise Nuclear Energy and Engineering Instrumentation (computer programming) Safety Risk Reliability and Quality business Waste Management and Disposal |
| Zdroj: | Progress in Nuclear Energy. 43:159-165 |
| ISSN: | 0149-1970 |
| Popis: | Compared to international standards, vibration diagnosis of German pressurised water reactors ranks high ( Bastl et al, 1980 ). Based on the Condition Monitoring System COMOS a lot of operational experiences could be gathered meanwhile and led to founded knowledge of long-term experiences. Meanwhile a successor system called “COMOSnt” is developed and installed in several plants. After a brief description of COMOS system features, a case study based on PWR internal vibrations is presented. In German BWRs, until now no multi-sensorial vibration monitoring comparable to PWR standards is established. Reasons for this can be related to constructional characteristics, differences in neutron-flux instrumentation and variable speed-driven operating mode of reactor recirculation pumps. However, current issues with regard to core internals were reasons to investigate BWR vibration monitoring principles, taking into account e.g. vibration sensors at reactor recirculation pumps, self-powered neutron detectors and accelerometers from loose parts monitoring. Noise analyses of incore-neutron flux signals showing specific modes of fuel assembly vibrations are presented in detail. The correlation analyses could be verified by means of accompanying structure model calculations. At present, specific systems for recirculation pump monitoring are running in three BWRs, an overall vibration monitoring concept including core internals is tested in a reference plant. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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