Results of instrumental inspection of the flow path of the hydroelectric unit of the middle flow derivational HPP

This article presents the results of an assessment of the technical condition of the flow path of the hydroelectric unit of the derivational HPP to obtain initial data for the organization of water discharges during an emergency stop of the HPP. The article presents the results of the examination of: a fast-falling shield with embedded parts; grooves of the repair gate; turbine impeller; turbine shaft; elements of the guiding apparatus; turbine stator and spiral chamber; suction pipe. The basic data of visual inspection and instrumental studies, measurements of nodes, assessments of the technical condition of equipment and structures carried out on the basis of survey data are presented. Recommendations are also given for the possibility of further safe operation of the examined nodes and elements of the flow path.