Coal built India’s industrial rise, but now it is becoming a liability. Still powering 73% of electricity and feeding steel, aluminium, and cement, coal also makes India the world’s third-largest carbon emitter. With net-zero targets looming, the transition is urgent. Converting ageing coal plants into nuclear hubs offers a rare triple win- decarbonisation, energy security, and economic continuity. This paper examines how India can make that shift.
KUNDAN DAS
ENERGY TRANSITION AND DECARBONISATION CONSULTANT
FOR NEWS ANALYTICS
a 5 mins read.
India’s coal economy is not limited to public power generation—it is deeply embedded in the country’s industrial backbone. The steel industry, the world’s second largest, relies on captive coal plants and emits nearly three tonnes of CO₂ per tonne of output. Aluminium production, one of the most electricity-intensive sectors, sources almost all its power from dedicated coal stations to maintain uninterrupted smelting.
The cement sector, too, depends on coal for 25–35% of its energy needs in clinker and kiln operations. These industries are clustered around coal belts in Odisha, Chhattisgarh, Jharkhand, and Madhya Pradesh, where jobs, energy access, and local economies are tied to coal. As India shifts toward cleaner energy, these very sites—already equipped with land, grid links, cooling systems, and skilled labour—could become ideal locations for advanced or modular nuclear reactors, enabling deep decarbonisation while revitalising regional economies.
These industrial clusters are typically located near coal belts in Odisha, Chhattisgarh, Jharkhand, and Madhya Pradesh—regions where energy access, employment, and livelihoods are intertwined with the coal economy. As demand evolves, these locations could serve as prime candidates for deploying advanced or modular nuclear reactors, offering both decarbonization and regional revitalisation.
How the C2N Transition will help India
Energy Security: With NTPC leading, coal ensures a reliable baseload for aluminium, iron, steel, and cement industries, sustaining growth and grid stability.
Using existing transmission, cooling, transport, and security infrastructure can cut costs by 15–35%, speed up construction, and avoid land acquisition delays.
- Economic Stability: Persistent coal operations under NTPC safeguard industrial jobs, regional economies, and supply chains through partnerships with energy-intensive manufacturing sectors.
- Industrial Backbone: Coal power supports critical process heat and continuous operations for Aluminium, Iron, Steel, and Cement companies during clean transition phases.
- Transition Financing: NTPC’s modernisation allows carbon capture projects, co-firing hydrogen, and lifecycle upgrades—enabling low‑carbon transformation in allied industries.
- Strategic Collaboration: NTPC’s leadership fosters public-private synergy, leveraging existing coal infrastructure to fund future nuclear, hydrogen, and renewable integration programs.
FROM COAL TO NUCLEAR
According to the DOE’s C2N framework, repurposing coal plant sites for nuclear use can be significantly more economical than developing greenfield projects. Shared infrastructure—such as transmission lines, cooling systems, transport routes, and security zones—can reduce overall investment by 15–35%, accelerate project completion, and mitigate land acquisition delays.
Assessment of the right Nuclear Technology is key as India considers its present position.
| Focus Areas | Challenge / Status | Key Gap Identified | Global Context | Required Action for India |
| Nuclear Research & Skills | Limited academic depth | PhD and R&D shortfall | Advanced globally in Gen‑IV | Build talent, research ecosystem |
| Thorium Utilization | Untapped fuel cycle | Lack of fissile enrichment | India’s unique reserves are unused | Accelerate thorium reactor R&D |
| Fusion Technology | Early participation only | Missing domestic innovation | US, EU investing billions | Fund the national fusion program |
| SMR & MMR Development | Initial discussion stage | Limited prototypes, design know-how | Korea, US, France advancing | Partner, co-develop modular tech |
| Geo‑political Cooperation | Fragmented collaboration | Need tech-sharing frameworks | Global nuclear deals expanding | Deepen alliances with key nations |
In the Indian context, the Central Electricity Authority (CEA) has identified around 25 GW of subcritical coal units that are over 25 years old and due for retirement by 2035. These sites, located near industrial demand centres, provide ideal settings for small modular reactors (SMRs) or high-temperature gas-cooled reactors (HTGRs). Moreover, the reuse of cooling ponds, switchyards, and road infrastructure complements India’s land-scarce energy transition strategy, where large renewable installations face significant siting constraints.
For India’s twin demands of grid stability and high-temperature industrial heat, advanced nuclear technologies provide modular, scalable, and thermally flexible solutions.
SUITABLE REACTOR TECHNOLOGIES
For India’s dual need—grid reliability and industrial heat—advanced nuclear technologies can offer modular, scalable, and thermally versatile options:
- Pressurised Heavy Water Reactors (PHWRs): Mature domestic technology with local manufacturing capacity, suited for large-scale baseload generation.
- Small Modular Reactors (SMRs): Compact 50–300 MWe units suitable for existing coal sites or industrial use. Their modular construction can reduce project time and capital intensity.
- High‑Temperature Gas Reactors (HTGRs): Can supply process heat up to 900°C, enabling decarbonization of steel reheating, alumina calcination, and cement kilns.
- Molten Salt Reactors (MSRs): Future options for combined electricity‑, heat‑hydrogen production, aligning with India’s National Green Hydrogen Mission objectives.
BENEFITS OF TRANSITION
Energy Security and Grid Stability: Unlike intermittent renewables, nuclear power provides firm baseload energy essential for industrial operations and stable grids. Replacing ageing coal plants with modular nuclear reactors can ensure 24×7 clean electricity, complementing solar and wind generation. Reduced coal imports—currently over 200 million tonnes annually—strengthen India’s energy independence.
Economic Continuity and Regional Revitalisation: Coal plant closures threaten local economies in states like Jharkhand and Chhattisgarh, where entire communities depend on coal operations. Nuclear conversion projects can sustain the same infrastructure while creating 300–500 skilled jobs per site, direct employment and many indirect, stimulating local economies through construction, maintenance, and services.
Economic modelling (based on DOE findings) suggests each converted plant could sustain hundreds of direct jobs, generate ₹2,000–3,000 crore in annual regional economic activity, and maintain local tax revenue streams. The transition can thus become a cornerstone of a “Just Transition” strategy for coal regions.
Industrial Decarbonization: Nuclear energy can directly support low-carbon industrial transformation:
- Green Steel: HTGRs or advanced reactors can provide high-temperature heat or power for producing hydrogen and operating electric arc furnaces.
- Aluminium Smelting: Stable high-grade electricity from SMRs can replace captive coal units, reducing the sector’s carbon footprint by up to 80%.
- Cement: Hybrid nuclear–electric heating for pre-calcination could offset fossil fuels in clinker production.
Environmental Impact: Replacing even 10% of India’s coal power with nuclear could avoid up to 200 million tonnes of CO₂ annually while significantly cutting SO₂, NOx, and particulate matter emissions. The smaller land footprint—only 10% that of solar or wind for equivalent output—also minimises ecological displacement. By eliminating coal ash disposal and reducing water contamination, nuclear conversion can substantially improve air and water quality across industrial regions.
Public concern over nuclear safety and waste hampers acceptance; a National Coal-to-Nuclear Repowering Mission could formalise the transition and build trust.
CHALLENGES AND CONSTRAINTS
Despite lifecycle advantages, nuclear projects demand heavy upfront investment. In India, the cost of PHWRs ranges from ₹18–20 crore per MW, and advanced SMRs may initially cost even more. Establishing sovereign green bonds, public–private partnerships, and viability gap funding could bridge financing gaps. Categorising nuclear under India’s green finance taxonomy and enabling private sector participation could unlock significant capital.
India’s nuclear governance, under the Atomic Energy Act (1962), centralises reactor ownership with the government. To encourage coal‑to‑nuclear conversion, the policy framework must evolve to allow joint development between public utilities (like NTPC or Coal India Ltd.) and NPCIL, or through build-operate partnerships where licensed PSUs manage operations within strict safety oversight by the Atomic Energy Regulatory Board (AERB).
Coal plant employees possess valuable thermal system knowledge but require certification in nuclear safety protocols and radiation management. Establishing dedicated nuclear retraining centres within current coal hubs—potentially through collaborations with the Bhabha Atomic Research Centre (BARC) and technical universities—can facilitate a smooth labour transition and preserve community livelihoods.
PUBLIC PERCEPTION
Nuclear projects face social trust barriers, largely due to public concerns about safety and waste storage. To operationalise this transition, India could consider a National Coal Repowering with Nuclear Mission (NCRNM) built around three pillars:
Pilot Projects: Convert two ageing coal units into modular nuclear demonstration projects by 2032.
Industrial Integration: Deploy high-temperature nuclear reactors in steel/ aluminium clusters by 2035 for integrated power‑and heat supply.
Skill Development: Launch a “Coal‑to‑Clean Workforce Transition Program” jointly run by CIL, NPCIL, and Skill India. Invest in Thorium MSR with Closed-Loop Fuel Management: India can invest in Thorium MSR through research funding, pilot reactors, public-private partnerships, recycling infrastructure, and regulatory support for closed fuel cycles.
This mission would align with the National Hydrogen Mission, Make in India, and Atmanirbhar Bharat initiatives, while positioning India as a global leader in hybrid nuclear‑industrial decarbonisation.
India’s journey from coal-driven growth to a carbon-neutral future demands innovative transitions that balance climate responsibility with economic progress. The conversion of coal power plants to nuclear energy provides such a pathway—leveraging existing infrastructure, preserving regional economies, and offering secure, low-carbon energy for both power and industrial sectors.
While challenges in financing, regulation, and social acceptance remain, strategic policy support and public-private collaboration can make this transition feasible and transformative. If successfully implemented, coal‑to‑nuclear repowering could not only decarbonise India’s power grid but also revolutionise its hard-to-abate industrial sectors—steel, aluminium, and cement—turning the legacy of coal into a foundation for a sustainable, nuclear-powered future.
(Kundan Das is an Energy Transition and Decarbonisation consultant specialising in integrating nuclear energy solutions for sustainable manufacturing. The views expressed are of the author and do not necessarily reflect the views of The News Analytics Herald.)
Key Takeaways
- Coal continues to generate 73% of India’s electricity and sustain major energy-intensive industries.
• Converting ageing coal plants to nuclear reduces emissions while retaining jobs and existing infrastructure.
• SMRs and HTGRs provide reliable, clean power alongside high-temperature heat for heavy industries.
• Repurposing coal sites for nuclear saves land, enhances energy security, and revitalises local economies.
• Successful coal-to-nuclear transition depends on financing, regulatory reform, and strong public acceptance.
