India’s nuclear energy programme took a significant step forward this week as its long awaited fast breeder reactor finally reached criticality. While the term may sound technical, the development is being closely watched by scientists, policymakers, and energy experts alike because of what it could mean for the country’s long term energy future.
The reactor in question, the Prototype Fast Breeder Reactor (PFBR), has been under development for years at the Indira Gandhi Centre for Atomic Research in Kalpakkam. Achieving criticality marks the point at which the reactor can sustain a nuclear chain reaction on its own, without external support. It doesn’t mean the plant is fully operational yet, but it does signal that one of the most complex phases of the project has been successfully completed.
What makes a fast breeder reactor different from conventional nuclear reactors is the way it handles fuel. Instead of simply consuming uranium, it is designed to generate more fuel than it uses. This is done by converting uranium 238, typically considered less useful into plutonium-239, which can then be used as fuel. The idea, rooted in the principle of Nuclear Breeding, has long been seen as a way to extend the life of nuclear resources.
For India, this matters more than it might for other countries. The country has relatively modest reserves of high grade uranium but vast deposits of thorium. Decades ago, nuclear physicist Homi J. Bhabha laid out a three stage programme that would eventually allow India to tap into its thorium reserves for energy. Fast breeder reactors form the crucial second stage of that plan, producing the materials needed to make the transition possible.
