Repair of Dividing Plane of High-pressure Turbine Vessel using mobile Cold Spray technology

In light of the current global development, the nuclear energy sector demands more rapid and sophisticated repair methods over conventional procedures. VZU Pilsen executed one of the first successful applications of mobile Cold Spray (CGS) technology. Between October 22 and 26 2024, a specialized repair was conducted on a damaged section of the dividing plane in the high-pressure component during a scheduled shutdown. This repair preceded a meticulous preparation and qualification process that assessed and selected the optimal repair method, comparing traditional weld repair to CGS technology. The repair process encompassed several critical steps: defect identification, surface preparation, manual grinding using a turbine grinder, application of CGS spray, 3D scanner measurement, and final surface finishing. The successful repair demonstrates the promising potential of Cold Spray technology for applications within the nuclear energy sector.