Nalubaale HPS, Uganda

Nalubaale Power Station, formerly known as Owen Falls Dam, is a hydroelectric power station across the White Nile near to its source at Lake Victoria in Jinja district. Its Location coordinates are: Latitude= 0.443525, Longitude= 33.1847 respectively. It is the oldest hydropower station in Uganda commissioned in 1954. It was renamed Nalubaale by H.E Excellency Yoweri Kaguta Museveni, the president of Uganda in 2001.

Elektrownia Nalubaale

Originally Owen falls dam was designed for ten turbines rated at 15 megawatts (20,000 hp) each (a total of 150 megawatts (200,000 hp). In the the 1990s, the station was refurbished to repair the accumulated wear from a decade of civil disorder. During the repairs, the output power of the generators was increased, bringing the Nalubaale Power Complex’s generating capacity to 180 megawatts (240,000 hp).

Due to the location – distance and lack of technical and logistical facilities, apart from technical challenges, the project was a huge logistical challenge.

Our scope concerned the repair of the Kaplan turbine hub at the place of the blade seat. After years of operation, the sealing surfaces were destroyed by corrosion and erosion.

Elektrownia Nalubaale

Therefore, the customer has decided to repair the damaged edges by installing new fragments in the form of shrinking and welded rings, which were then machined to the original, correct shape.

Our scope included:

  • machining grooves for the rings embedding in five holes – turbine blade sockets,
  • ring embedding (these rings were also manufactured by us and delivered to Uganda),
  • final machining after welding (welding performed by an external company),
  • grinding of internal diameters to obtain the desired tolerance and roughness parameters.

Elektrownia Nalubaale

The Machining

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Power Station and landscapes

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