India Enters Second Stage of Nuclear Power Programme with PFBR Breakthrough; PM Modi Hails

India has achieved a significant milestone in its civil nuclear energy programme with the Prototype Fast Breeder Reactor (PFBR) at Kalpakkam Nuclear Complex attaining first criticality, marking a breakthrough in the country's advanced nuclear technology efforts.

The development represents a major scientific and strategic achievement, placing India among a small group of nations capable of building and operating fast breeder reactors - one of the most complex nuclear technologies in the world.

PM Narendra Modi Hails Historic Achievement

Prime Minister Narendra Modi described the moment as a defining step in India's nuclear journey.

Calling it a proud moment for the nation, the Prime Minister said the reactor's successful criticality reflects the strength of India's indigenous scientific capability and engineering expertise. The project has been designed and built entirely in India after decades of research, innovation and technological development.

What the Milestone Means

In nuclear terminology, criticality refers to the stage when a reactor begins a self-sustaining nuclear fission chain reaction, meaning the reaction can continue without external intervention.

Although the reactor will undergo several more tests before operating at full power, reaching criticality is considered one of the most crucial steps in commissioning any nuclear reactor.

India Enters Second Stage of Nuclear Programme

The achievement marks India's formal entry into the second stage of its three-stage nuclear power programme, originally envisioned by nuclear pioneer Homi Jehangir Bhabha.

According to Ajit Kumar Mohanty, Chairman of the Atomic Energy Commission, the milestone highlights India's progress in peaceful nuclear energy development and strengthens the country's long-term energy strategy.

Two Decades of Indigenous Effort

The 500-megawatt sodium-cooled fast breeder reactor has been developed by Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI) at the campus of the Indira Gandhi Centre for Atomic Research in Kalpakkam.

The project took more than 20 years of intensive scientific work, involving some of the most complex engineering challenges undertaken by India's nuclear establishment.

Scientists say the reactor showcases India's ability to develop advanced nuclear technology independently, despite the technical complexity and limited global expertise in fast breeder reactors.

Technology That Produces More Fuel Than It Uses

Fast breeder reactors are unique because they can generate more nuclear fuel than they consume.

Unlike conventional reactors that mainly use uranium, breeder reactors use plutonium as fuel and convert uranium-238 into plutonium-239, effectively creating additional fuel during operation.

This capability makes them highly valuable for long-term energy security.

Key Step Towards Thorium-Based Energy

The PFBR is also crucial for India's plan to eventually use thorium-based reactors in the third stage of its nuclear programme.

India holds one of the world's largest thorium reserves, and breeder reactors will help generate the materials required to unlock this resource for large-scale energy production.

Rare Global Achievement

Very few countries have successfully built operational fast breeder reactors. Currently, only Russia runs a commercial fast breeder reactor, highlighting the technological complexity of the field.

India's achievement therefore marks a major step in the global nuclear technology landscape.

Boost for Clean Energy Goals

The breakthrough also supports India's long-term climate commitments, including the goal of achieving net-zero emissions by 2070 and expanding nuclear power capacity to 100 gigawatts by 2047.

Fast breeder reactors are expected to play a key role in delivering reliable, low-carbon energy while strengthening India's energy independence.

A Moment of National Pride

The success of the PFBR at Kalpakkam is widely being seen as a symbol of India's scientific capability and technological self-reliance, marking an important chapter in the country's peaceful nuclear energy programme.