Assessment and replacement of Francis, Kaplan and Pelton runners
Technical diagnostics to determine whether the generating unit runner should be repaired, replaced or repowered.
Braz Hydro assesses runners affected by cavitation, efficiency loss, erosion, deformation and cracking. The work combines operating history, dimensional inspection and non-destructive testing to support an engineering decision.
Issues the assessment can clarify
Cavitation, erosion and wear changing the runner hydraulic profile.
Performance loss, vibration or instability during operation.
Cracks, deformation and uncertainty about remaining component life.
How we carry out the work
Technical review
We review drawings, maintenance history, operating data, incidents and available inspection records.
Inspection and diagnosis
We perform visual and dimensional inspections and, where applicable, non-destructive testing in critical areas.
Runner engineering
We compare the observed condition with the unit’s hydraulic, mechanical and installation requirements.
Intervention recommendation
We provide a technical basis for repair, new runner manufacture or repowering.
IllustrationIllustrative images — not photographs of a specific plant.
What we need
- Turbine type: Francis, Kaplan or Pelton.
- Drawings, specifications and data for the existing runner.
- Operating, maintenance and incident history.
- Inspection records, photographs, measurements and performance data.
What you receive
- A diagnosis of runner condition and deterioration mechanisms.
- A record of dimensions, critical areas and inspection results.
- An assessment of repair and replacement alternatives.
- A technical recommendation for the next project steps.
Frequently asked questions
Does Braz Hydro assess all runner types?
The assessment can be structured for Francis, Kaplan and Pelton runners, depending on the available information and component condition.
Can the inspection identify cracks?
Where applicable, we use non-destructive testing methods selected for the material, geometry and critical areas.
Does the assessment include manufacturing a new runner?
Not necessarily. The diagnosis can support repair, replacement or an engineering and supply proposal.