India's Nuclear Energy Roadmap: 24 Reactors, 8.78 GW Today and 100 GW by 2047 | CurrentPulse AI
India's Nuclear Energy Roadmap: 24 Reactors, 8.78 GW Today and 100 GW by 2047
📅 Published 1 September 2026•⏱ 4 min read•Science, Energy and EnvironmentGS Paper III
India's Nuclear Energy Roadmap: 24 Reactors, 8.78 GW Today
and 100 GW by 2047
Why in News?
India operates 24 nuclear power reactors across seven sites with total installed capacity of 8.78 GW,
while nine additional reactors are under construction and preparations continue for 10 more units.
The Nuclear **Energy Mission **for Viksit Bharat targets 100 GW of nuclear power capacity by 2047, more
than eleven times the present 8.78 GW base.
The Union Budget 2025-26 allocated ₹20,000 crore for indigenous Small Modular Reactor development,
placing advanced reactor technology within India's long-term clean-energy strategy.
Nuclear Energy in the Power Mix
Nuclear plants provide firm low-carbon electricity and can complement variable solar and wind generation.
Unlike solar and wind, nuclear output is not dependent on daily weather, but reactors require high capital
expenditure, long construction periods and rigorous safety systems.
Moving from 8.78 GW to 100 GW by 2047 requires a very large acceleration in construction,
fuel-cycle capability, manufacturing and regulation.
Capacity factor and actual generation matter alongside installed GW because reliable baseload output is a key
nuclear advantage.
Three-Stage Nuclear Programme
India's three-stage programme was designed around limited domestic uranium and large thorium resources.
Stage I uses Pressurised Heavy Water Reactors with natural uranium; Stage II envisages fast breeder reactors
using plutonium; Stage III aims to use thorium through uranium-233 pathways.
Thorium-232 itself is fertile rather than fissile; it can be converted into fissile uranium-233.
This distinction between fissile and fertile material is a recurring Prelims concept.
Small Modular Reactors
SMRs are smaller reactors designed for modular manufacture and potentially shorter construction schedules
than very large conventional plants.
The ₹20,000 crore Budget allocation for indigenous SMRs signals an attempt to build domestic
technology and manufacturing capability.
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India works with the International Atomic Energy Agency on safeguards, safety and security while retaining
sovereign regulation.
Low-probability, high-impact accidents make institutional independence and safety culture critical.
Emergency planning must cover plant workers, surrounding communities, evacuation, communication and
long-term environmental monitoring.
Non-Power Applications
Nuclear technologies are used in healthcare for diagnosis and cancer treatment, in agriculture for mutation
breeding and pest control, and in food irradiation for preservation.
Radioisotopes support industrial radiography, measurement and scientific research.
Nuclear heat and electricity can potentially support desalination and low-carbon hydrogen production.
Thus, atomic energy policy extends beyond electricity generation.
Climate Dimension
Nuclear power has low operational carbon emissions and can contribute to decarbonising electricity while
maintaining firm capacity.
Lifecycle emissions include mining, construction, fuel processing and decommissioning but remain far below
unabated fossil generation in most assessments.
India's rising electricity demand means decarbonisation requires adding clean supply while also expanding total
generation.
Nuclear, renewables, storage, grids and efficiency therefore function as a portfolio rather than mutually exclusive
options.
Waste and Fuel Cycle
Spent nuclear fuel remains radioactive and requires secure handling, reprocessing or long-term disposal
depending on policy.
India's closed fuel-cycle approach seeks to recover useful fissile material from spent fuel.
Radioactive waste is much smaller in physical volume than fossil-fuel waste but requires containment over long
periods.
Public confidence depends on transparent safety data and credible waste-management institutions.
Way Forward
Build domestic reactor manufacturing and skilled manpower to support the 100 GW by 2047 target.
Ensure regulatory capability grows at least as fast as reactor deployment.
Use standardised designs and fleet construction to reduce delays and costs.
Invest in SMRs, fast reactors and thorium research without compromising near-term safety.
Strengthen public communication on radiation, emergency planning and waste management.
Nine reactors under construction; preparations for 10 more.
Target:100 GW by 2047.
₹20,000 crore allocated in Union Budget 2025-26 for indigenous SMRs.
Thorium-232 is fertile; uranium-233 is fissile.
Probable Mains Question
A 100 GW nuclear target can strengthen India's low-carbon energy security, but requires
simultaneous progress in technology, regulation, fuel cycle and public trust. Discuss.