The fusion energy programme in India has steadily evolved over the past few decades. Mention India's…

Question

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 ?

Ghissu Editorial · Accepted Answer

India, building on its ADITYA and SST-1 tokamaks, contributes the cryostat, in-wall shielding, cooling water, cryolines and plasma heating systems to ITER. Success would offer near-limitless, carbon-free baseload power from seawater deuterium and lithium-bred tritium, reshaping global energy geopolitics.

**Introduction**

India's fusion programme grew from ADITYA, the first indigenous tokamak at IPR Gandhinagar (1989), to the superconducting SST-1 (first plasma 2013), which let India join ITER in 2005 as one of seven partners.

**India's Contributions to ITER**

1. **Cryostat**: ITER-India at IPR delivered the cryostat, the world's largest stainless-steel vacuum vessel, built by Larsen and Toubro.
2. **Shielding, cooling and cryogenics**: India supplies the in-wall shielding, the cooling water system and the cryolines that keep the magnets cold.
3. **Plasma heating**: Ion cyclotron and electron cyclotron heating sources and a diagnostic neutral beam come from India, which bears about 9% of construction value, largely in kind.

**Implications of ITER's Success for Global Energy**

SKETCH: flow | If ITER Proves Q=10
- 50 MW in, 500 MW out
- DEMO power plants
- Carbon-free baseload
- Weaker fossil geopolitics

1. **Near-limitless fuel**: Deuterium from seawater and tritium bred from lithium would end fuel scarcity and import dependence.
2. **Clean and safe power**: Fusion emits no carbon dioxide, leaves no long-lived high-level waste and cannot run away like a fission chain reaction.
3. **A new energy order**: Abundant baseload for data centres, desalination and green hydrogen would weaken the leverage of fossil-fuel exporters over importers like India.
4. **Realistic caveats**: The 2024 baseline pushes deuterium-tritium operation to 2039, and tritium breeding and materials remain unsolved, so fusion complements renewables rather than replacing them soon.

**Conclusion**

India has moved from learner to co-builder in fusion. If ITER proves its tenfold energy gain, fusion could deliver clean, secure energy for the century, and India will hold both the know-how and the industrial base to build its own fusion plants.

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