India is building its energy future on several pillars at once: bio-ethanol, coal gasification, renewables, and nuclear power. The intent is not diversification for its own sake but a deliberate convergence of energy security, industrial transformation, and long-term decarbonisation. The scale of ambition is considerable. India has committed to 500 GW of non-fossil fuel electricity capacity by 2030 and roughly 1,800 GW of total installed capacity by 2047, with nuclear power expected to contribute around 100 GW of that total.
Nuclear holds this position for a straightforward reason: it is one of the few low-carbon sources that can deliver reliable, high-density baseload power at scale. Nuclear accounts for about 9-10 per cent of global electricity generation, though the spread across countries is wide. France draws nearly 70 per cent of its power from nuclear; the United States 19-20 per cent; Russia and South Korea roughly 20 and 30 per cent respectively; Canada close to 15 per cent, and China around 6 per cent. India sits at 2-3 per cent.
That gap reflects a specific constraint: limited domestic uranium reserves. India recognised this early and structured its entire nuclear programme around it. India’s nuclear programme was designed from the start around the country’s resource reality: scarce uranium, abundant thorium. The three-stage structure addresses this directly. Stage 1: Pressurised Heavy Water Reactors (PHWRs) using natural uranium as fuel. Stage 2: Fast Breeder Reactors (FBRs) using plutonium and depleted uranium.
Stage 3: Thorium-based reactors using Uranium-233 derived from thorium. India began its nuclear research programme with the APSARA reactor in 1956, followed by CIRUS, ZERLINA, and PURNIMA. These early reactors built the foundation: reactor physics expertise, fast breeder knowledge, and the trained scientific base needed for indigenous development. The first commercial nuclear station at Tarapur used Boiling Water Reactors, then India pivoted toward its own technology with the Rajasthan Atomic Power Station and the development of PHWRs. Over time, PHWRs became the backbone of the Indian nuclear power. Indigenous designs grew from 220 MWe to 540 MWe and then to 700 MWe systems, and India achieved self-reliance in heavy water production. The Fast Breeder programme advanced alongside.
The Fast Breeder Test Reactor commissioned in 1985 led to the 500 MWe Prototype Fast Breeder Reactor, a sodium-cooled system representing the critical second stage of the programme. Fast breeders matter because they convert fertile material into fissile fuel, which is how India eventually unlocks its thorium reserves at scale. India also expanded through international partnerships, establishing VVER-1000 Pressurised Water Reactors at Kudankulam with Russian collaboration. Today, India has standardised 700 MWe PHWR designs and is advancing thorium reactor research toward the third stage.
The cumulative achievement is significant: a country that started with almost no uranium has built one of the most coherent long-term nuclear strategies in the world. India has recently shifted nuclear policy toward a faster growth trajectory. The proposed SHANTI (Sustainable Harnessing and Advancement of Nuclear Energy for Transforming India) Act, 2025, is intended to open the sector to greater private participation and joint ventures in civil nuclear power generation. Small Modular Reactors (SMRs) are central to what comes next.
These are advanced nuclear reactors typically ranging from 50 MWe to 300 MWe per unit. Unlike conventional large plants, SMRs are factory-manufactured, modular, and deployable faster. Their advantages for India are practical: lower upfront capital, shorter construction timelines, enhanced passive safety systems, suitability for remote and industrial locations, flexibility alongside renewables, reduced land and water requirements, and better grid stability. For a country building energy capacity across a vast and varied geography, these characteristics matter.
Expanding nuclear capacity and deploying SMRs requires a safety infrastructure that matches the ambition. Nuclear safety challenges span interconnected domains: reactor physics, heat removal, fire and explosion risk, human-machine interaction, system reliability, and long-term operational maintainability. Although the Government of India does have its Safety Research Institute under the Atomic Energy Regulatory Board at Chennai and has the facility for risk assessment, it is with conventional systems. India currently lacks a fully indigenous platform for integrated consequence analysis and industrial safety modelling.
Despite growing nuclear and industrial infrastructure, regulators and operators continue to rely on imported software such as DNV PHAST, Gexcon FLACS, ANSYS CFD solvers, Shell FRED, and Flydyn systems. That dependence creates licensing constraints, technology vulnerabilities, and strategic limitations in a sector directly tied to national security and critical infrastructure. To close this gap, scientists and software developers at INDRAX Safety and Energy Solutions are building Agni Kawach™, an AI-enabled Computational Fluid Dynamics (CFD)-based consequence modelling and industrial safety platform. It is the first serious attempt at an indigenous alternative for critical safety infrastructure tailored to Indian local environmental conditions.
The platform is built to simulate gas dispersion, fire scenarios, vapour cloud explosions, blast-wave propagation, thermal radiation effects, and multi-hazard industrial accident scenarios. It uses Porosity/Distributed Resistance (PDR) modelling, a globally established methodology for dispersion and explosion analysis, integrated into a software architecture designed for nuclear, hydrogen, LNG, refinery, and defence applications. Agni Kawach™ incorporates GPU-accelerated CFD solvers, RANS and LES turbulence modelling, AI-enhanced surrogate modelling, Physics-Informed Neural Networks (PINNs), CAD-based simulation interfaces, real-time hazard forecasting, and automated compliance reporting.
It is being aligned with Indian regulatory standards including PESO, OISD, and MSIHC regulations, with a view to covering future nuclear and defence safety requirements. The system is designed to align with Indian regulatory standards including PESO, OISD, and AERB regulations, and future nuclear and defence safety requirements. Hazardous Wastes (Management and Handling) Rules, 1989 state that these rules will not apply to radioactive wastes (Rule 2 (e). Radioactive wastes are covered under the provisions of the Atomic Energy Act and rules made there under.
Rules 2(b) and 3 of Manufacture, Storage and Import of Hazardous Chemical Rules (1989) under the Environmental Protection Act, 1986 have notified AERB as the authority to enforce directions and procedures as per Atomic Energy Act with respect to radioactive substance. As India scales its nuclear and industrial energy systems, Agni Kawach™ reduces dependence on costly imported platforms while building sovereign capability in a strategically sensitive area. The parallel to India’s achievements in defence, digital infrastructure, and space technology is direct: indigenous safety platforms are as essential to Atmanirbhar Bharat as the reactors themselves.
India today possesses one of the world’s most comprehensive long-term nuclear energy strategies, centred on energy security, technological sovereignty, and sustainable utilization of thorium resources. India has one of the most coherent long-term nuclear strategies of any country, grounded in energy security, technological sovereignty, and the eventual large-scale use of thorium. The next phase requires moving from strategy to deployment: faster build-out, private-sector involvement, SMR commercialisation, and a domestic safety ecosystem to support it all.
Thus, the following steps are recommended:
^ The Government of India should aggressively promote SMRs based on fast breeder and thorium technologies to strengthen national energy security and reduce long-term fossil fuel dependence. Reduced nuclear waste in Thorium based Reactors. Nuclear waste is always a concern among the population around the nuclear plants apart from reactor meltdowns.
^ Nuclear reactors, components, instrumentation systems, and safety platforms should be developed domestically to the greatest extent possible under the Make in India framework.
^ A graded incentive and subsidy structure for SMR projects should reward indigenous content. Projects above 50 per cent domestic content may qualify for initial incentives; projects exceeding 90 per cent should receive higher strategic support sustained over a ten-year period.
^ With fast breeder technology, thorium research, and indigenous safety systems advancing in parallel, India should position itself as an exporter of advanced nuclear reactors and SMRs before 2047.
^ Platforms such as Agni Kawach™ should receive national strategic support as part of India’s critical infrastructure ecosystem, ensuring technological independence in nuclear safety and industrial risk assessment. Nuclear energy is becoming one of the central pillars of India’s energy security and decarbonisation strategy. Abundant thorium reserves, growing indigenous technical capability, and a rapidly expanding industrial economy give India a credible path to global leadership in advanced nuclear systems. SMRs are both an energy solution and an industrial opportunity.
Developing them through the fast breeder-thorium route positions India as a technology exporter, particularly relevant for developing economies across Asia, Africa, and the Middle East that will need dependable low-carbon baseload power. India’s nuclear future will not rest on reactors and fuel cycles alone. It will rest equally on indigenous digital safety infrastructure, AI-driven risk assessment systems, and sovereign technological capability. Agni Kawach™ represents that next phase.
(The writer is Chair, Environment & Climate Change Committee, PHDCCI, former Chairman, EAC – Ministry of Environment, Forest & Climate Change, and Director, Indrax-Safety and Energy Solutions. He can be reached at jeewanprakashgupta @indrax.co.in)