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OKB “GIDROPRESS” is a Russian nuclear engineering company implementing the design, theoretical, analytical, R&D and production activities in reactor development. It is a subsidiary of the Russian state atomic energy corporation Rosatom.
The company is focused on developing water-water energetic reactor (WWER or VVER) designs for a wide range of power outputs. WWERs are a type of pressurized water reactors that are cooled and moderated using water. WWER reactor plants designed by OKB “GIDROPRESS” are operated at 21 nuclear power plants in Russia, Ukraine, Armenia, Finland, Bulgaria, Hungary, Czechia, Slovakia, China, and Iran.