The VVER (From ; transliterates as Vodo-Vodyanoi Energetichesky Reactor; Water-Water Energetic Reactor)'s a series of pressurised water reactors (PWRs) developed by the Soviet Union and used by Armenia, Bulgaria, China, Czech Republic, Finland, Hungary, India, Iran, Slovakia, Ukraine and the Russian Federation. The earliest VVERs were built before 1970. The VVER-440 Model V230's the most common design, delivering 440 MW of electrical power. The V230 employs six primary coolant loops each with a… (More on Vver)