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India’s Fast Breeder Reactor at Kalpakkam Reaches First Criticality

The step begins Stage II of India’s three-stage plan toward thorium-fueled energy.

Overview

  • The 500 MWe PFBR, which achieved a self-sustaining chain reaction Monday, now enters a gradual power-up and testing phase under regulatory oversight.
  • Built by BHAVINI on the IGCAR campus, the sodium-cooled reactor uses mixed-oxide fuel and a uranium-238 blanket to breed new fissile material.
  • Prime Minister Narendra Modi and Atomic Energy Commission chair Ajit Kumar Mohanty praised the milestone as progress toward fuel self-reliance and cleaner baseload power.
  • Full operation will follow months of staged commissioning, and India would then join Russia as the only country running a commercial-scale fast breeder reactor.
  • The project anchors a closed fuel cycle with reprocessing of spent fuel, and planners are weighing additional breeder units at Kalpakkam after commissioning results.