“…The current methods of repair of the main elements of hydraulic turbines are outdated and have certain disadvantages. These disadvantages are long terms, high cost and, in addition, a decrease in the runner reliability due to metal structure disturbances [21,22] (the reconditioned part does not have the same parameters as the original metal), internal stresses, and mechanical and hydraulic imbalance. Restoring the operating geometry of the runner and guide vanes remains a challenge year after year, while costs are increasing financially, materially, and over time.…”