India’s Prototype Fast Breeder Reactor in Kalpakkam has achieved criticality in 2026, marking a key step in nuclear power generation, energy security, and long-term sustainable fuel development. BulletsIn Prototype Fast Breeder Reactor (PFBR) achieves a key criticality milestone Located at the Kalpakkam nuclear complex, Tamil Nadu Kalpakkam Criticality means a self-sustaining nuclear chain reaction has



