Discuss the rationale behind India's three-stage nuclear power programme. How does thorium utilisation address India's long-term energy security?

Q. Discuss the rationale behind India's three-stage nuclear power programme. How does thorium utilisation address India's long-term energy security? (15 marks, 250 words)

India holds limited uranium but among the world's largest thorium reserves. The three-stage programme, conceived by Homi Bhabha on a closed fuel cycle, is a strategic roadmap to convert this endowment into durable energy independence.

Rationale — bridging a resource mismatch - Resource logic: scarce fissile uranium is sequenced through reactor stages to progressively multiply domestic fuel and eventually tap abundant fertile thorium [1]. - Stage 1: natural uranium in Pressurised Heavy Water Reactors (PHWRs), yielding plutonium as by-product [1]. - Stage 2: Fast Breeder Reactors burn plutonium while breeding more fissile material, building the inventory thorium use requires [1]. - Stage 3: Uranium-233, bred from thorium, fuels reactors for large-scale generation — the closed cycle extracts near-complete energy from limited feed [1]. - Strategic autonomy: indigenous fuel insulates the grid from import and geopolitical risk in enriched-uranium supply [1].

Thorium and long-term energy security - Domestic abundance: thorium (monazite sands) cuts forex outflow and supplier-nation leverage, anchoring self-reliance [1]. - Clean-energy scale: supports Net-Zero-2070; the Nuclear Energy Mission targets 100 GW by 2047, with ₹20,000 crore for Small Modular Reactors and five indigenous SMRs by 2033 [2]. - Enabling reforms: proposed amendments to the Atomic Energy Act, 1962 and Civil Liability for Nuclear Damage Act, 2010 aim to draw private capital and accelerate build-out [3].

Thus the programme turns a resource constraint into strategic advantage — aligning energy security with SDG-7 and India's clean-energy transition, provided FBR scale-up and financing reforms stay on track.

(~250 words)

Sources: 1. India's Installed Nuclear Power Capacity to Triple by 2031-32: Dr. Jitendra Singh (PIB) — three-stage rationale, closed fuel cycle, thorium/uranium endowment, capacity targets 2. Nuclear Power in Union Budget 2025-26 (Department of Atomic Energy, PIB) — Nuclear Energy Mission, ₹20,000 crore SMR outlay, 5 SMRs by 2033, 100 GW by 2047 3. Parliament Question: Enacting New Law for Nuclear Safety (PIB) — amendments to Atomic Energy Act and CLND Act for private participation