Union Home Minister Amit Shah on Wednesday said it is a "big day" in India's nuclear history as the indigenously designed 700 MW Kakrapar atomic power plant-3 in Gujarat achieved criticality.

The power plant achieving criticality means that it has reached the normal operating condition of a reactor. It indicates that the plant is now set to generate power.

"Big Day in India's Nuclear history as indigenously designed 700 MWe Kakrapar Atomic Power Plant-3 in Gujarat achieved criticality. Nation salutes our scientists on this stellar achievement. New India is marching ahead to realise PM @NarendraModi's vision of #AatmaNirbharBharat," Shah tweeted.

Prime Minister Narendra Modi too congratulated nuclear scientists, saying the indigenous reactor is a shining example of the 'Make in India' campaign.

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