India has achieved a major milestone on April 7, 2026, as the Prototype Fast Breeder Reactor (PFBR) at Kalpakkam attained criticality. This marks the start of a self-sustaining nuclear chain reaction and progress in India’s long-term nuclear energy strategy. BulletsIn PFBR at Kalpakkam reached criticality, marking start of controlled nuclear chain reaction. Criticality means reactor



