Kalpakkam fast breeder reactor achieves criticality, PM Modi calls it ‘defining step’ in nuclear journey Share April 6, 2026 minutespedia.in Topstory Prime Minister Narendra Modi on Monday hailed a major milestone in India’s civil nuclear programme, announcing that the indigenously built Prototype Fast Breeder Reactor (PFBR) at Kalpakkam, Tamil Nadu, has attained ‘criticality’.
