Work has begun on building the fifth and sixth nuclear reactors at the Kudankulam complex in Tamil Nadu. Each of the reactors will generate 1000 megawatts when completed, which will take a little over five years. The third and fourth reactors are still in the construction stage, with 50 per cent of the work completed. The first two reactors have been generating power since 2014 and 2016 respectively. The entire programme is being done in collaboration with Russia.