In Situ Francis Turbine Blade Replacement due to Gross Cavitation

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Ultra Sonic Inspection of replacement blades In Situ Francis turbine Blade Replacement | NWHA Hood River| 2013-05-23 40
Repair Results and Conclusions • Welding repairs to both downstream and upstream runners have proven very successful restoring structure integrity, blade thickness, profile and fairness • While still a blend of old and new repairs, the surface area of quality weld material has substantially increased particularly in areas prone to cavitation • All major structural defects have been repaired • All cavitation has been removed • The removal and replacement of blades worked according to planned procedure without issues In Situ Francis turbine Blade Replacement | NWHA Hood River| 2013-05-23 41
Page 1 and 2: In Situ Francis Turbine Blade Repla
Page 3 and 4: In This Presentation • Project Fa
Page 5 and 6: Project Facts and History • Manit
Page 7 and 8: Elements and Considerations of the
Page 9 and 10: Pointe du Bois Powerhouse Cross Sec
Page 11 and 12: Powerhouse Section and Photos In Si
Page 13 and 14: Overhead view of typical unit with
Page 15 and 16: Runner and Distributor Ring In Situ
Page 17 and 18: Typical condition of blades and ban
Page 19 and 20: Blade prepared for Laser Scan In Si
Page 21 and 22: Technical Aspects of Repair • Mat
Page 23 and 24: Technical Aspects of Repair • Pri
Page 25 and 26: Typical ‘as found’ condition In
Page 27 and 28: Removal and Replacement of blades i
Page 29 and 30: Gouging of fillet reveals voids In
Page 31 and 32: Blade prepared for removal In Situ
Page 33 and 34: Blade Removal and replacement In Si
Page 35 and 36: Old/New blades compare and trim In
Page 37 and 38: Removal and Replacement of blades i
Page 39: New blade being installed Presentat
Page 43 and 44: Acknowledgements: The following per

In Situ Francis Turbine Blade Replacement due to Gross Cavitation

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