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NEW DELHI, April 7 (Xinhua) -- India's Department of Atomic Energy on Tuesday announced that its most advanced indigenously designed nuclear reactor has reached criticality. Criticality in a nuclear programme is the stage at which a nuclear reactor achieves a self-sustaining fission chain reaction, where neutron production equals or exceeds losses. The reactor is located at Kalpakkam in the southern Indian state of Tamil Nadu and operated by state-run Bharatiya Nabhikiya Vidyut Nigam Ltd. "Wi ...Read More >
Hyderabad: Prime Minister Narendra Modi on Monday announced that indigenously designed and built 500 megawatt Prototype Fast Breeder Reactor (PFBR) at Kalpakkam has attained criticality -- which means that it is producing more nuclear fuel than it is consume. This makes India only the second country to run breeder reactors after Russia. Criticality means the start of controlled fission chain reaction: In the PFBR, it means producing more nuclear fuel and electric power. The PFBR runs on a mix o ...Read More >
New Delhi: India crossed a defining threshold in its energy journey on the evening of April 6, 2026. The 500 MWe Prototype Fast Breeder Reactor -- commonly known as the PFBR -- achieved first criticality at 8:25 PM at the Kalpakkam nuclear facility in Tamil Nadu, confirming the start of a controlled fission chain reaction inside the reactor core. What First Criticality Means and Why It Matters First criticality is the moment a nuclear reactor sustains a controlled chain reaction for the first ...Read More >
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The Bharatiya Nabhikiya Vidyut Nigam Ltd (BHAVINI) was set up to build the reactor in 2003 under the then Atal Bihari Vajpayee government. Representational image The country's first indigenously built fast breeder reactor in Tamil Nadu's Kalpakkam has attained criticality. The development was lauded by Prime Minister Narendra Modi on Monday. "Today, India takes a defining step in its civil nuclear journey, advancing the second stage of its nuclear programme," Modi wrote on social media. "The i ...Read More >
India's first prototype fast-breeder reactor (PFBR) in Tamil Nadu's Kalpakkam on Monday (April 6, 2026) came another step forward in its civil nuclear journey as it attained criticality. First criticality in a fast breeder reactor is the moment when the nuclear chain reaction becomes self-sustaining. A breeder reactor is a nuclear reactor that produces more fissile material than it consumes. In a 'fast' breeder reactor, the neutrons aren't slowed, allowing them to trigger specific fission react ...Read More >
Hyderabad-based Sigma-9 Aerospace and Defence Research Centre Pvt. Ltd. launched its anti-nuclear shield, a cutting-edge pioneering technology to safeguard humanity and environment from the devastating effects of nuclear explosions and their radioactive aftermath. The launch programme held in Begumpet, Hyderabad on Sunday (December 1, 2024) was attended by leading scientists, defence experts and dignitaries, including Rear Admiral Mohan Doss. Mr. Doss said that peace exists today because o ...Read More >
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