A 1,000-megawatt reactor is operating at the Russian-built Kudankulam power station Tamil Nadu province, with a second due to come onstream in 2015.

Russian President Vladimir Putin had been pushing for Rosatom to increase the number of reactors it could supply to as many as 25.

According to officials say that a total of six reactors will be built at Kudankulam, with a further six to follow at a site that has not yet been determined.

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