JSC Rusatom Energy International manages Hanhikiv-1 NPP construction project and its subsidiary, RAOS Project Oy is the general project contractor.

JSC ATOMPROEKT (ASE Group, St. Petersburg) is the NPP Chief Designer.

OKB HYDROPRESS develops engineering design documents for Hanhikivi-1 NPP Reactor Plant.

JSC Atomenergomash is the supplier of long-lead main components, including the Nuclear Steam Generation Plant for Hanhikivi-1 NPP.

JSC Concern Titan-2 is the main building contractor for Hanhikivi-1 NPP. The company is also in charge of constructing Leningrad-2 NPP at Sosnovy Bor, which is the reference plant for Hanhikivi-1.