India’s Prototype Fast Breeder Reactor (PFBR) at Kalpakkam, Tamil Nadu, it successfully attained criticality on April 6, 2026. This milestone, announced by Prime Minister Narendra Modi, it signifies the initiation of a sustained, controlled nuclear fission chain reaction , it is a major achievement in the second stage of India’s three stage nuclear power program..
About PFBR
- The 500-megawatt electrical (MWe) pool type reactor was fully designed and constructed by Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI) and the Indira Gandhi Centre for Atomic Research (IGCAR), marking a significant “Aatmanirbhar Bharat” achievement..
- In this fast breeder technology , reactor uses Uranium Plutonium Mixed Oxide (MOX) fuel and is designed to create more fissile material than it consumes…
- The reactor serves as a crucial bridge to the third stage of India’s nuclear program which aims to leverage the country’s vast thorium reserves…
- India will be the second country after Russia to operate a commercial scale fast breeder reactor , once fully operational ..
Criticality of any reactor is the state where the reactor core sustains a stable, self-sustaining nuclear fission chain reaction without external neutron input. This means the reactor is now working as designed. It is not yet generating full electricity for the grid, but this milestone allows for subsequent low-power physics experiments and future power generation..
the PFBR is expected to go through a series of testing phases before full power generation, with anticipated completion and grid connection expected by September 2026..
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