Diagnostics and Extending the Operational Life of Existing Assets The Scientific Research Institute of Energy Structures (NIIES, part of the RusHydro Group) Center for the Control of Hydro-power Equipment Safety (CCHES) and a special diagnostic laboratory to test equipment and materials by non-destructive methods when constructing, installing, repairing, and operating at enterprises which belong to the group of hazardous production facilities, have been operating since 2011.