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The Water-Water Energetic Reactor (VVER), or WWER (from ; transliterates as Vodo-Vodyanoi Energetichesky Reaktor; Water-Water Power Reactor) is a series of pressurised water reactor designs originally developed in the Soviet Union, and now Russia, by OKB Gidropress. Power output ranges from 70 to 1200 MWe, with designs of up to 1700 MWe in development. VVER power stations were, are or will be used by Argentina, Armenia, Bangladesh, Belarus, Bulgaria, China, Czech Republic, Egypt, Finland, Germany, Jordan, Hungary, India, Iran, Slovakia, Turkey, Ukraine, Russia and Vietnam.