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Diagnostics in NPP Paks

8/15/2012. Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee. 2. Topics:. Reactor

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Diagnostics in NPP Paks

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    2. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 2 Topics: Reactor & primary loops lose-part detection Reactor noise diagnostics Reactor upper block leakage detection Rotating machinery vibration diagnostics Summary

    3. Reactor & primary loops loose-part detection

    4. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 4 The Advanced Loose Part monitoring System (ALPS) developed in the 2000-2003 years. Requirements: Detecting and identifying loose-parts and foreign objects. Localization. Weight estimation. Avoid false alarms. Ability of event storing and acoustic play backing. Simplified report generating. Event based noise handling. Teachable event classification and identification. Reactor & primary loops loose-part detection

    5. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 5 Reactor & primary loops loose-part detection Available signals: Main circulating Pump accelerometers 6 channel Main Isolation Valve accelerometers 6 channel Steam generator accelerometers 6 channel Reactor safety and control rod accelerometers 6 channel Primary circle pressure fluctuation signals 4 channel 28 channel These signals are available in the diagnostic laboratories.

    6. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 6 Reactor & primary loops loose-part detection

    7. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 7 Reactor & primary loops loose-part detection

    8. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 8 Reactor & primary loops loose-part detection

    9. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 9 Reactor & primary loops loose-part detection

    10. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 10 Identified and classified events Main isolation valve bascule noise Check valve vibration (stroke) Safety and control rod moving MCP starting Steam generator hotside air bleeding pipe noise. Main stem isolation quick-action valve operation stroke. Metallic debris bumps during stertup of reactor units. Serious loose parts have not detected the system started to work. Reactor & primary loops loose-part detection

    11. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 11 Reactor & primary loops loose-part detection

    12. Reactor noise diagnostics

    13. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 13 On focus: The reactors inner part vibration diagnostics. Safety and control rod Fuel assembly Core barrel motion monitoring. In-core coolant velocity measurement. Based on measuring the transport time between two axial neutron detectors. In1977 the measurements are succesfully verified the fact of thermal assymmetry of the reactor of the unit 2. Reactor noise diagnostics

    14. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 14 The old system developed by the KFKI Atomic Energy Research Institute of Budapest at the beginning of the 80s. Its necessary to rebuild the old system. The name of the new system: PAZAR (Autonomous Noise Data Aquisition System for the Paks NPP) Input signals of the new system: Designed to measure max. 352 signal. In-core SPND noise signals. (288 pcs). In-core thermocouple signals (31 pcs) Reference signal (1 pcs) Other, non implemented inputs (32 pcs) (for example: Ex-core ionic chamber signals - present time these are not available for diagnostic purposes-, Safety & control rod accelerometer signals.) Reactor noise diagnostics

    15. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 15 Reactor noise diagnostics

    16. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 16 Reactor noise diagnostics

    17. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 17 Reactor noise diagnostics

    18. Reactor upper block leakage detection

    19. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 19 Reactor upper block leakage detection Acoustic system Former system developed by the KFKI of Budapest at the beginning of the 80s. Installed on the Unit 3 & 4. Reconstructed in 2002-2003. Named: ALMOS (Acoustic Leaking Monitoring System) Detectors: Upper block at the Reactors simple nickel sealing of pipe branches Acoustic emission detectors: 4/reactor Detectors connected to the surfaces by wave guides. Local, hardware RMS forming. Intranet-based display of trends, alarms.

    20. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 20 The red circles shows the rods which are mounted with detectors. The yellow circles shows the adjacent rods near the detector mounted rods.The red circles shows the rods which are mounted with detectors. The yellow circles shows the adjacent rods near the detector mounted rods.

    21. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 21 Reactor upper block leakage detection

    22. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 22 Reactor upper block leakage detection

    23. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 23 Future development tasks Developing verification and validation methods in order to avoid false alarms. Developing more effective calibration methods Artificial real leakage. Building-up an alarm system to the control room. Reactor upper block leakage detection

    24. Rotating machinery vibration diagnostics

    25. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 25 Rotating machinery vibration diagnostics

    26. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 26 Rotating machinery vibration diagnostics

    27. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 27 On-line system for MCP vibration monitoring Rotating machinery vibration diagnostics

    28. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 28 On-line system for MCP vibration monitoring Rotating machinery vibration diagnostics

    29. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 29 On-line system for MCP vibration monitoring Rotating machinery vibration diagnostics

    30. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 30 On-line system for MCP vibration monitoring Rotating machinery vibration diagnostics

    31. 8/15/2012 Diagnostics in NPP Paks - 2005 June 27-30 Knoxville, Tennessee 31 Summary Diagnostic methods have demonstrated the usability in lot of cases. The acoustic based alarm and signaling systems complement the classical measuring methods. The application of diagnostic techniques help us to realize predictive maintenance in case of some rotating machinery. The importance of diagnostic methods are growing in the topics of power up rating and lifetime enhancement in our NPP.

    32. Thank You for your attention! kiss-g@npp.hu

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