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?

Nuclear fusion seeks to replicate the Sun's energy-producing process by fusing light nuclei such as deuterium and tritium. ITER, being built in France, is the world’s largest international fusion experiment. ITER is designed to produce 500 MW of fusion power from 50 MW of input heating.

India’s Contributions to ITER:

• Financial and in-kind contribution: India is one of the seven ITER partners and contributes around 9% of ITER’s in-kind hardware components (valued at approximately ₹17,500 crore), which gives Indian scientists 100% access to all generated intellectual property and experimental data.
• Cryostat: India has supplied the world's largest high-vacuum stainlesssteel pressure chamber. Weighing 3800 tonnes, it houses the entire reactor and maintains the ultra-cold environment needed for superconducting magnets.
• Cryogenic

Distribution

System:

India engineered and supplied advanced cryolines and cryo-distribution networks. These use liquid helium and nitrogen to cool the massive magnets to -269 °C to maintain superconductivity.

• In-Wall Shielding blocks: India designed complex in-wall shielding blocks to protect the vacuum vessel walls from high-energy neutron bombardment during high-temperature operations.
• Plasma heating systems: India built complex Ion-Cyclotron RF and Electron-Cyclotron RF heating systems required to heat plasma to fusion conditions (temperatures >150 million degrees °C).
• Power Supplies: India provided high-voltage electrical networks and steady-state power supply systems vital for powering the heavy electromagnetic apparatus.
• Cooling water and heat rejection system: Indian contribution includes systems needed to remove heat generated during fusion experiments.

Implications of ITER’s Success for Global Energy:

• Commercial Proof of Concept: It will prove that a self-sustaining "burning plasma" can be controlled at an industrial scale, providing the foundational blueprints for future commercial fusion power plants.
• Clean energy source: Fusion can provide large-scale energy with negligible greenhouse gas emissions during operation.
• Abundant fuel supply: Deuterium can be obtained from seawater, while tritium can be bred from lithium, reducing dependence on fossil fuels.
• Energy security: Fusion can reduce import dependence and geopolitical conflicts linked to oil, gas and coal.
• Low long-lived waste: Compared to fission, fusion is expected to produce much less long-lived radioactive waste.
• Inherent safety: Fusion does not involve a runaway chain reaction; if operating conditions fail, the plasma cools, and the reaction stops.
• Base-load power: Fusion could provide reliable round-the-clock electricity, complementing intermittent renewables like solar and wind.
• Technology spillovers: It will advance superconducting magnets, robotics, cryogenics, materials science, AI-based plasma control and hightemperature engineering.
• Global cooperation: ITER can become a model of peaceful international scientific collaboration in energy security.

ITER will not itself generate commercial electricity, but it is a crucial bridge between laboratory fusion and future fusion power plants. Its success can open the path to clean, safe, abundant and sustainable energy for the world.