Thorium connects India’s natural resources with its nuclear programme: IGCAR director Sreekumar G. Pillai
If a grain of sand from the coast is able to meet the electricity requirement of a city, it will be a great thing, he says.
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Context
At a symposium organized by the , the Director of the highlighted the crucial role of thorium, abundant in coastal sands, in India's three-stage nuclear programme. The symposium emphasized nuclear energy's importance as a reliable, clean baseload power source crucial for India's dual challenge of increasing electricity generation while decarbonizing the power sector.
UPSC Perspectives
Science & Technology
India's three-stage nuclear power programme, formulated by in the 1950s, is designed to achieve energy security by utilizing the country's vast thorium reserves. The programme is a sequential process because thorium is fertile but not fissile, meaning it cannot directly sustain a nuclear chain reaction. In Stage I, Pressurized Heavy Water Reactors (PHWRs) use natural uranium to produce electricity and plutonium-239 as a byproduct. Stage II involves Fast Breeder Reactors (FBRs) that use a mix of plutonium-239 and uranium-238 to breed more fissile material than they consume, while also producing uranium-233 by irradiating thorium-232. Finally, Stage III utilizes Advanced Heavy Water Reactors (AHWRs) fueled by uranium-233 and thorium-232, completing the cycle and utilizing the extensive thorium reserves. The progression from uranium to plutonium and ultimately to thorium is the foundational sequence for long-term nuclear sustainability in India.
Geography
The distribution of natural resources is a core geographical concept relevant to India's energy strategy. India possesses approximately 25% of the world's known thorium reserves, primarily found in the form of monazite sand deposits along the coastal regions. Significant deposits are located in , , , and , with the article specifically mentioning the coastal sands of . The reliance on thorium is a strategic necessity because India has relatively limited domestic reserves of high-grade uranium, which makes it dependent on imports for the initial stages of its nuclear programme. Transitioning to thorium utilization through the three-stage programme is therefore essential for achieving energy independence and leveraging domestic geographical endowments.
Environmental
Nuclear energy plays a critical role in the context of global climate change and India's commitment to reducing carbon emissions, such as the targets announced at . Nuclear power provides a clean energy alternative to fossil fuels, as it generates electricity with minimal greenhouse gas emissions during operation. Crucially, unlike variable renewable sources like solar and wind, nuclear energy provides baseload power, ensuring a reliable 24/7 electricity supply necessary for grid stability. The transition to nuclear power is presented as a vital strategy for decarbonization, allowing India to scale up its electricity production to meet growing economic demands without proportionally increasing its carbon footprint. However, the expansion of nuclear energy must balance these environmental benefits with the rigorous safety protocols overseen by bodies like the to manage risks associated with radiation and nuclear waste.