The fusion energy programme in India has steadily evolved over the past few decades. Mention India’s contributions to the international fusion energy project – International Thermonuclear Experimental Reactor (ITER). What will be the implications of the success of this project for the future of global energy?
Approach · directive: “mention / what”
What it asks · Trace India’s fusion research, list what India contributes to ITER, and assess what ITER’s success would mean for global energy.
The question has 2 parts — answer each
- Mention India's contributions to ITER, with the evolution of India's own fusion programme as context
- Explain the implications of ITER's success for the future of global energy
Open with · Fusion — the reaction that powers the Sun — promises abundant, low-carbon baseload power; India pursues it through the Institute for Plasma Research (IPR), Gandhinagar, and as a full ITER member since 2005.
Cover
- Evolution: ADITYA tokamak (1989) and its upgrade; SST-1, a steady-state superconducting tokamak; a roadmap towards an indigenous fusion reactor.
- Membership: one of seven ITER members (EU, China, India, Japan, Korea, Russia, USA); India bears about 9% of construction cost, mostly as hardware.
- In-kind hardware: the cryostat, in-wall shield blocks, cooling-water system, cryolines and cryo-distribution, RF heating sources, power supplies, diagnostics.
- Spin-offs: Indian industry, including many MSMEs, gains skills in precision fabrication, cryogenics, superconducting magnets and high-power electronics.
- Global energy: near-limitless fuel (deuterium from seawater, tritium bred from lithium), no CO2, no long-lived high-level waste, no runaway chain reaction.
- Geopolitics: less fossil-fuel dependence and import vulnerability; shared intellectual property gives members like India access to the technology.
- Caveats: repeated delays and cost overruns, tritium supply, materials under neutron load; commercial fusion power is likely decades away.
Close with · ITER’s success would turn fusion from a physics experiment into an engineering route to clean baseload power — and India, as a co-builder, would be ready to use it.
Add value (verified)
- India’s in-kind share of ITER includes the cryostat, in-vessel shields and large parts of the cooling-water, cryogenic and cryo-distribution systems. PIB, Department of Atomic Energy — Message from the Prime Minister at the start of ITER assembly (29 July 2020) ↗“India stands proud with its fair share of contributions in terms of its in-kind contributions, viz., the cryostat, in vessel shields, substantial contributions to the cooling water, cryogenic and cryo-distribution systems”
Question: UPSC's CS (Main) 2025, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 30 Sept 2026 (how we verify) — UPSC publishes no model answers. ·
Model answer · 224 words (UPSC limit 150) · Minimalist IAS
Fusion — the reaction that powers the Sun — promises abundant, low-carbon baseload power. India has pursued it through the Institute for Plasma Research, Gandhinagar, from the ADITYA tokamak (1989) to SST-1, a steady-state superconducting tokamak, and as a full ITER member since 2005.
India's contributions to ITER
- Partner: one of seven members (EU, China, India, Japan, Korea, Russia, USA), bearing about 9% of the construction cost, mostly in kind.
- Hardware: the cryostat (the machine's outer vacuum chamber), in-wall shield blocks, the cooling-water system, cryolines and cryo-distribution, radio-frequency heating sources, power supplies and diagnostics.
- Industry: Indian firms, including many MSMEs, have gained skills in precision fabrication, cryogenics, superconducting magnets and high-power electronics.
Implications of success for global energy
- Fuel: deuterium from seawater and tritium bred from lithium — near-limitless and widely available, ending dependence on imported fuel.
- Clean and safe: no CO2, no long-lived high-level waste, no runaway chain reaction — firm, round-the-clock power to complement variable renewables.
- Shared knowledge: ITER's intellectual property is shared among members, giving India a route to its own demonstration reactor.
- Caveats: repeated delays and cost overruns, tritium supply and materials under neutron load; commercial fusion is likely decades away.
ITER's success would turn fusion from a physics experiment into an engineering route to clean baseload power — and India, as a co-builder, would be ready to use it.
Written by Minimalist IAS from facts checked at source (how we verify) — a little fuller than exam length, so every part of the question is covered; in the hall, keep the structure and trim the detail. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.