Indian Prototype Fast Breeder Reactor attains criticality

Yesterday evening, at 8:25 PM Indian Standard Time, the Prototype Fast Breeder Reactor (PFBR) at Kalpakkam in Tamil Nadu achieved first criticality — the initiation of a self-sustaining, controlled nuclear fission chain reaction. It is a milestone that has been a long time coming: more than two decades in the making, marked by repeated delays, [ ]