Examine the rationale behind India's push for Small Modular Reactors. How do they differ from conventional large nuclear reactors in addressing energy security?

The Union Budget 2025-26 created a Nuclear Energy Mission with a ₹20,000 crore outlay for research, design and deployment of Small Modular Reactors (SMRs), tied to a goal of 100 GW nuclear capacity by 2047 [1]. With installed capacity at only 8.78 GW, SMRs are India's chosen instrument to bridge the gap between present scale and net-zero ambition.

Rationale for the SMR push

• Capacity gap: nuclear capacity is projected to reach about 22 GW by 2031-32, leaving a very large addition to be achieved by 2047 — unattainable through large reactors alone [1].
• Climate commitment: nuclear offers low-carbon, round-the-clock baseload that firms up variable solar and wind, supporting Net Zero by 2070 [2].
• Investment mobilisation: the sector's capital intensity prompted amendments to the Atomic Energy Act, 1962 and the Civil Liability for Nuclear Damage Act, 2010, culminating in the SHANTI Act, 2025, which permits limited private participation under regulatory oversight [1][3].
• Technological self-reliance: BARC is developing the BSMR-200, the SMR-55, and a High Temperature Gas Cooled Reactor for hydrogen — with at least five indigenous SMRs targeted by 2033 [1][2].

How SMRs differ from large reactors

• Scale and siting: modular units of tens to a few hundred MWe can be sited near industrial clusters or retiring thermal plants, unlike large reactors needing exceptional site conditions.
• Financing and gestation: factory-built modules shorten construction timelines and lower per-project capital risk, making private entry feasible.
• Grid role: distributed SMRs reduce transmission dependence and improve supply resilience, whereas large units concentrate both output and outage risk.
• Decarbonising hard sectors: high-temperature designs extend nuclear beyond electricity into hydrogen and process heat [2].

SMRs thus reframe nuclear energy from a few mega-projects into a scalable, replicable option matched to India's dispersed demand. Realising this promise will depend on rigorous safety regulation, fuel security and demonstrated cost competitiveness — but as an addition to the renewables-led transition, the SMR route strengthens both energy security and the Viksit Bharat 2047 vision.