India’s first indigenous Prototype Fast Breeder Reactor (PFBR) at Kalpakkam has successfully attained criticality, marking a major advancement in the country’s nuclear energy programme. It reflects progress towards efficient fuel utilisation and long-term energy security.
In nuclear physics, criticality refers to the state where a self-sustaining chain reaction occurs, meaning the number of neutrons produced equals the number lost or used in further fission. This balance ensures stable reactor operation.
APSC Relevance: Important for science & technology, nuclear energy and India’s energy security.
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