Prototype Fast Breeder Reactor at Kalpakkam, Tamil Nadu attains First Criticality

The 500 MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam, Tamil Nadu, achieved its first criticality on April 6, 2026.

This landmark event, driven by indigenous design from IGCAR and construction by BHAVINI, is crucial for India's long-term energy security, its three-stage nuclear power program, and the future utilization of thorium resources. It also marks a significant advancement in the country's indigenous nuclear technology capabilities.