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The design life of power plant components (e.g. nozzles and pipes) is limited by a large number of different transient thermal,  pressure and supplementary piping loads causing material fatigue. Tracking and assessing them continuously at the identified sentinal locations is required in many cases and urgently recommended in others.

The Fatigue Monitoring System (FAMOSi) – as an essential part of the aging and lifetime management of power plant components – provides a comprehensive overview of components that are known to experience high level of thermo-mechanical fatigue
. FAMOSi uses special measurement sections with thermocouples to detect thermal loads caused by stratification or plug flow. Alternatively, the application of thermo-hydraulic transfer functions is an option. In both cases, local transient load data are the basis for the fatigue assessment within a graded concept: Simplified Fatigue Estimation (SFE), Fast Fatigue Evaluation (FFE) and Detailed Fatigue Calculation (DFC). Accurate evaluation of local thermal loads is crucial to ensure compliance with the tightened fatigue rules. AREVA NP’s most comprehensive approach is its Nuclear Steam Supply System (NSSS) Fatigue Assessment and Evaluation.

Your benefits

  • Accurate computation of fatigue thanks to local measurement with qualified instrumentation and data acquisition methods
  • Interfaces to the plant’s operational instrumentation and control (I&C) system and to AREVA NP’s Aging Management Tool COMSY available
  • Establishes a realistic data basis for reliable fatigue analyses
  • Avoids replacement of costly components
  • Identify and optimize operating modes that are unfavorable for component fatigue
  • Essential part of the NSSS Advanced Fatigue Solution (AFS) for lifetime extension programs and break preclusion concepts
  • Cost savings through component lifetime extension (less replacements) and through the increase of component availability

Interested in Fatigue Monitoring System – FAMOSi?

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Webinar "Condition Assessment of High-temperature Applications in Power Generation and Process Technology"

This webinar highlights and illustrates the possibilities of the integrated creep-fatigue concept that combines design review, design code based creep-fatigue analysis, advanced numerical models, in-situ materials analysis and destructive testing into a hands-on condition assessment.