Q. 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?

Model Answer:

India’s fusion energy programme, spearheaded by domestic tokamaks (Aditya, SST-1), advanced significantly by joining the global ITER mega-science project in 2005 as a full partner.

1. India’s Contributions to ITER

• Cryostat Assembly: L&T manufactured the world’s largest high-vacuum pressure chamber, which safely encloses the entire magnetic system.
• In-wall Shielding: Supplied thousands of specialized blocks to protect superconducting magnets from high-energy fusion neutrons.
• Thermal Management: Designed critical heat rejection and cryo-distribution cooling systems to manage extreme temperature gradients.
• Plasma Heating: Developed robust Ion-Cyclotron Radio Frequency (ICRF) heating systems to help plasma reach 150 million °C.

2. Implications for Future Global Energy

• Infinite Fuel Supply: Relies on globally abundant isotopes (Deuterium from seawater, Tritium), democratizing global energy security.
• Carbon-Neutral Baseload: Delivers highly concentrated, continuous 24/7 power with zero greenhouse gas emissions, critical for Net-Zero targets.
• Inherent Safety: Eliminates nuclear meltdown risks (as plasma cools instantly upon disruption) and produces no long-lived radioactive waste.
• Unprecedented Efficiency: Targets a Q-factor > 10 (generating 500 MW of thermal energy from just 50 MW of input power).

ITER’s success will bridge the gap between theoretical plasma physics and commercial grid application, transitioning humanity toward an era of clean, sustainable, and boundless energy abundance.