Assessment of defects in a welded HP rotor

Steam turbine - generator set

Component:

  • A welded construction HP rotor

Problem:

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

Solution:

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

Benefits:

  • 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