The Nuclear Power Corporation of India Limited(NPCIL) declared that Unit-3 of Kakrapar Atomic Power Project(KAPP-3), India’s First 700 MWe (megawatt electric) and indigenously prepared Pressurised Heavy Water Reactor(PHWR) in Surat, Gujarat attained its first criticality – beginning of controlled and sustained nuclear fission reaction on 22nd July 2020(Wednesday).