India and Russia have signed a protocol on amendments to the 2008 inter-governmental agreement on cooperation in construction of additional nuclear reactors in Kudankulam Nuclear Power Project site and in construction of Russia-designed nuclear power plants at new sites in India.
The Russian nuclear energy agency has built 2 X 1,000 MWe VVER nuclear reactors and is constructing four more reactors with similar capacity.
India's largest nuclear power project Kudankulam is meant to have six 1,000-Megawatt Power plants, with a total installed capacity of 6,000 Megawatts.
Of this, the first plant was operationalised in 2013 and the second was operationalised in 2016.
The four remaining plants are in various stages of construction.
All of these reactors are of the VVER-1000 class.
It is a Water-Water Energetic reactor design developed in the erstwhile Soviet Union.