Assessment of defects in a welded HP rotor

Steam turbine - generator set


  • A welded construction HP rotor


  • Assessment of defects found in the welds and close to the bore


  • Sampling for chemical analysis, impact and creep testing
  • Defect assessment in conformity with R5 methodology


  • Confirmed that the materials composition was within specification
  • Established the current impact and creep properties
  • Life demonstrated to be inadequate under current operating conditions
  • Restricted operating regime identified to give required remaining life

Plant Integrity