Surface Modeling and Rapid Prototyping for In-Situ Runner Blade Repair at Ear Falls Station

Prepared by: Ontario Power Generation Group, Northwest Plant Group, Hydro Turbine Runners

Ontario Power Generation has developed a new technique that allows for accurate, quick repair of cavitation damage on a runner blade. This technique was tested on a Morris turbine runner at the 18.5-MW Ear Falls Generating Station.

  • Completed runner inserts made from 316 stainless steel were shipped from foundry on May 28/09.
  • Total time to create inserts – 7 days.
  • Inserts were welded in place at Ear Falls G.S. on June 02/09.
  • No runner blade distortion.
  • Integrity of work to be inspected in approximately one year.

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