Economic effectiveness of using temporary runners on the turbines of the first line of the Nurek hydroelectric station

1. The installation of temporary runners at high-head hydroelectric stations provides: shortening of the station startup time and reduction in the cost of the starting complex with an absolute effectiveness of additional investments in the temporary structures; reliable operation of the hydropower equipment with minor changes in construction of the turbines; possibility of prolonged investigation and testing of the structures and adjustment of the equipment under conditions of gradual build-up of the heads and capacity. 2. The use of temporary runners guarantees operation of the turbines without erosion of the flow section and vibrations, i.e., without the adverse phenomena that have occurred at a number of hydroelectric stations during temporary operation with reduced heads.