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.
It asks 2 things — 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 · India's fusion programme has grown from the ADITYA tokamak (1989) at the Institute for Plasma Research, Gandhinagar, to the superconducting SST-1 and full ITER membership 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 physics experiment into an engineering route to clean baseload power; India, co-builder of its cryostat, could add it to the Nuclear Energy Mission for Viksit Bharat target of 100 GW by 2047.
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”
- ITER's design goal: a ten-fold power return (Q=10), 500 MW of fusion power from 50 MW of input heating; JET's 1997 record was 16 MW.ITER Organization — What is ITER? (In a few lines) ↗“In 1997, JET produced 16 MW of fusion power from a total input heating power of 24 MW (Q=0.67). ITER is designed to yield in its plasma a ten-fold return on power (Q=10), or 500 MW of fusion power from 50 MW of input heating power.”
- ITER's membership and origin: the idea was launched in 1985; the members are China, the EU, India, Japan, Korea, Russia and the USA.ITER Organization — What is ITER? (In a few lines) ↗“since the idea for an international joint experiment in fusion was first launched in 1985. The ITER Members— China, the European Union, India, Japan, Korea, Russia and the United States —are now engaged in a decades-long collaboration”
- The ITER cryostat, India's largest in-kind contribution, is about 30 x 30 metres and 3,800 tonnes, built by Larsen & Toubro.ITER Newsline — Indian giant faces the challenges of a 'unique object' ↗“the ITER cryostat , the largest high-vacuum pressure chamber ever built, a component that is very large (30 x 30 metres), very heavy (3,800 tonnes) and of mind-boggling complexity. Larsen & Toubro Ltd.”
- Union Budget 2025-26: the Nuclear Energy Mission for Viksit Bharat targets 100 GW of nuclear capacity by 2047.PIB backgrounder, February 2025 — Nuclear Energy Mission (Union Budget 2025-26) ↗“the government has introduced the Nuclear Energy Mission for Viksit Bharat. This initiative aims to enhance domestic nuclear capabilities, promote private sector participation, and accelerate the deployment of advanced nucle”
Question: UPSC's CS (Main) 2025, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 3 Oct 2026 (how we verify) — UPSC publishes no model answers. ·
Model answer· 223words · Minimalist IAS
India's fusion programme has grown from the ADITYA tokamak (1989) at the Institute for Plasma Research, Gandhinagar, to the superconducting SST-1 and full ITER membership since 2005.
- 1985: ITER proposed
- 1989: ADITYA tokamak
- 1997: JET's 16 MW record
- 2005: India joins ITER
India's contributions to ITER
- Partner: one of seven ITER members, bearing about 9% of construction cost, mostly in kind.
- Cryostat: the outer vacuum chamber, 30 m by 30 m and 3,800 tonnes, the largest high-vacuum pressure chamber ever built, by Larsen & Toubro.
- Systems: in-vessel shields, cooling-water and cryogenic systems, RF and beam heating, power supplies and diagnostics.
Implications of ITER's success for global energy
- Proof of net gain: ITER targets Q = 10, 500 MW of fusion power from 50 MW of heating, against JET's 16 MW record.
- Fuel: deuterium from seawater and tritium bred from lithium, near-limitless.
- Clean and safe: no CO2, no long-lived waste, no runaway chain reaction; firm power beside variable renewables.
- Shared knowledge: members share ITER's intellectual property, a route to India's own demonstration reactor.
- Caveats: delays, cost overruns, tritium supply, neutron-resistant materials; commercial fusion is decades away.
ITER's success would turn fusion from physics experiment into an engineering route to clean baseload power; India, co-builder of its cryostat, could add it to the Nuclear Energy Mission for Viksit Bharat target of 100 GW by 2047.
Prepared by Minimalist IAS to the answer standard of Shivam Singh (mentor, 7 years) · facts checked against official sources (how we verify) · updated 3 Oct 2026. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.
