15/05/2026
India has taken a defining step in its scientific and strategic journey.
On 6 April 2026, the indigenously developed 500 MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam officially attained “criticality” — the point at which a sustained nuclear chain reaction begins.
This is not merely a technological milestone.
It marks India’s entry into the second stage of Dr. Homi Bhabha’s long-envisioned three-stage nuclear programme — a vision designed to eventually harness India’s vast thorium reserves for long-term energy security.
What makes this achievement extraordinary is that the reactor has been designed, engineered, and built largely through Indian scientific capability and institutions.
Fast Breeder Reactor technology is among the most complex areas in nuclear engineering. Only a handful of nations have successfully advanced to this level.
The Prototype Fast Breeder Reactor at Kalpakkam is not just about electricity generation.
It represents:
• Scientific self-reliance
• Strategic technological capability
• Long-term energy sovereignty
• Indigenous engineering excellence
• Confidence in Indian research and innovation
A proud moment for every Indian.
Saluting the scientists, engineers, researchers, technicians, and every individual whose dedication made this historic achievement possible.
Jai Hind. 🇮🇳
Official Government References:
• PIB Government of India:
https://www.pib.gov.in/FactsheetDetails.aspx?Id=150617
• Prime Minister’s Office (PMO):
https://www.pmindia.gov.in/en/news_updates/pm-congratulates-scientists-and-engineers-as-prototype-fast-breeder-reactor-at-kalpakkam-attains-criticality/
