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Prototype Fast Breeder Reactor (PFBR) Achieves Criticality

9 April 2026

Prototype Fast Breeder Reactor (PFBR) Achieves Criticality

The achievement of criticality by India’s 500 MW Prototype Fast Breeder Reactor (PFBR) at Kalpakkam marks a major milestone in the country’s nuclear energy programme. Criticality refers to the stage where a self-sustaining nuclear fission chain reaction is established, indicating that the reactor is operationally ready for controlled energy production.

Historically, India’s nuclear strategy has been guided by Dr. Homi Bhab

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