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Renewables Newsletter Nuclear Energy
Nuclear Energy in India: Strategic Role, Growth Outlook and Key Challenges
India’s nuclear energy programme is an important part of the country’s transition to low-carbon electricity. Nuclear is a clean source of energy though but not renewable and as India moves towards its net-zero target and electricity demand continues to grow, nuclear power provides a reliable, low-emission source of electricity that complements variable renewable energy. It helps balance the grid, manage the daily ‘Duck Curve’, and supply continuous baseload power for industries. To support its net-zero ambitions, India has set a target of increasing its nuclear power capacity from the current 8.78 GW to 100 GW by 2047. To achieve the country's target of 100 GW of nuclear capacity by 2047, India is estimated to require nearly INR 25 trillion in investments over the next two decades.
The SHANTI Act, 2025
The Sustainable Harnessing and Advancement of Nuclear Energy for Transforming India (SHANTI) Act, 2025, enacted in December 2025, replaced the 1962 Atomic Energy Act and marked a major reform in India's nuclear power sector. The Act ended the government's monopoly over nuclear power generation and opened the sector to private participation.
Technology
India's nuclear technology landscape has witnessed significant progress through advancements in reactor technology, standardised plant designs, and the development of next-generation nuclear reactors.
On April 6, 2026, India officially entered the second stage of its three-stage nuclear power programme with the successful first criticality of the indigenously developed 500 MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam, Tamil Nadu.
Stage I: Pressurized Heavy Water Reactors (PHWRs):
This stage uses natural uranium to generate electricity. Since natural uranium contains only a small portion of fissile material (Uranium-235), heavy water is used as a moderator to sustain the reaction.
- Objective: Along with electricity generation, the non-fissile uranium (Uranium-238) absorbs neutrons and converts into Plutonium-239. This plutonium is separated and stored for use as fuel in the second stage.
Stage II: Fast Breeder Reactors (FBRs):
This stage uses a mixed-oxide fuel, comprising Plutonium-239 recovered from Stage I and natural uranium. These reactors are called "fast breeders" because they use fast neutrons and actually breed more fissile material than they consume.
- Objective: As reactor capacity expands, thorium is introduced as a blanket around the reactor core. Neutrons from the reactor convert thorium into Uranium-233, creating the fuel required for the third stage.
Stage III: Thorium-Based Reactors:
The final stage will utilize Advanced Heavy Water Reactors (AHWRs). These reactors will be fuelled by the Uranium-233 produced in Stage II alongside natural thorium.
- Objective: The Uranium-233 sustains the nuclear chain reaction while continuously converting additional thorium into more Uranium-233. This creates a self-sustaining thorium fuel cycle.
The development of Fast Breeder Reactor (FBR) technology marks a significant milestone in India's nuclear energy programme. Given India's abundant thorium reserves, it represents a critical step towards achieving long-term energy self-reliance. Once fully operational, India will become only the second country in the world to operate a commercial Fast Breeder Reactor, strengthening the nation's energy security, reducing dependence on imported fuels.
To accelerate nuclear capacity addition and reduce project execution time and costs, the Department of Atomic Energy (DAE) has standardized the design of the 700 MWe Pressurized Heavy Water Reactor (PHWR). Standardization enables multiple reactors to be constructed simultaneously across different locations, improving manufacturing efficiency, strengthening the domestic supply chain, creating economies of scale, and reducing both project costs and construction timelines.
In addition, the Government has launched the Nuclear Energy Mission with an allocation of INR 20,000 crore to support the research, development, and deployment of Small Modular Reactors (SMRs). The mission targets the development and commissioning of at least five indigenously designed SMRs, including the Bharat Small Modular Reactor (BSMR-200), by 2033. Compared with conventional nuclear power plants, SMRs require lower upfront capital, have shorter construction periods, and offer greater operational flexibility. They are expected to provide reliable captive power to energy-intensive industries such as steel, aluminium, and other hard-to-abate sectors, while also facilitating the repurposing of retiring coal-fired power plant sites.
Current Operational Capacity
| Project | State | Technology | Capacity |
|
Kudankulam Nuclear Power Plant |
Tamil Nadu |
VVER |
2,000 MW |
|
Kakrapar Atomic Power Station |
Gujarat |
PHWR |
1,840 MW |
|
Rajasthan Atomic Power Station |
Rajasthan |
PHWR |
1,780 MW |
|
Tarapur Atomic Power Station |
Maharashtra |
BWR,PHWR |
1,400 MW |
|
Kaiga Generating Station |
Karnataka |
PHWR |
880 MW |
|
Madras Atomic Power Station (Kalpakkam) |
Tamil Nadu |
PHWR |
440 MW |
|
Narora Atomic Power Station |
Uttar Pradesh |
PHWR |
440 MW |
Note: 1) PHWR = Pressurised Heavy Water Reactor, 2) BWR = Boiling Water Reactor, 3) VVER = Russian Pressurized Water Reactor
Source: Nuclear Power Corporation of India (NPCIL)
Major announcements
| Project | Location | Capacity | Status |
|
Adani/Coastal-Maha project |
Ratnagiri, Maharashtra |
6,000 MW |
Proposed |
|
Reliance - SMR |
Purnagadh, Maharashtra |
220 MW units up to 1,200 MW units |
Proposed |
|
NTPC nuclear project |
Devgad, Maharashtra |
4,000 MW to 7,200 MW |
Proposed |
|
NLC India Limited–Nuclear power Corporation India Limited JV |
India-wide |
700 MW PHWR projects |
MoU signed |
|
BSMR-200 |
Tarapur proposed for lead unit |
220 MWe |
In-principle approval |
|
Kudankulam Units 5 & 6 |
Tamil Nadu |
2 x 1,000 MW |
Major equipment approval |
Source: Deccan Herald; National Stock Exchange of India (NSE); Department Of Atomic Energy (DAE); Telangana Today
Corporate Announcements
Nuclear Power Corporation of India – 50 GW
NTPC – 30 GW
Adani – 10 GW by 2035
Challenges
- High Capital Requirement and Long Project Timelines
- Nuclear power projects require very high upfront investment. According to TERI, achieving India's target of 100 GW of nuclear capacity will require nearly 25 trillion in investment.
- As per NITI Aayog's India Energy Security Scenarios (IESS) 2047, the capital cost per MW of nuclear power remains significantly higher than utility-scale solar and wind projects.
- Nuclear plants typically take more than 10 years to complete, resulting in long capital lock-in periods that discourage private investment without government support and financial guarantees.
- Land Acquisition and Public Opposition
- Identifying large, geologically suitable, and socially acceptable sites for nuclear power plants remains a major challenge.
- Projects such as the Jaitapur Nuclear Power Project have experienced significant delays due to land acquisition issues and local public opposition ("Not In My Back Yard" or NIMBY) over safety and environmental concerns.
- These delays often lead to substantial cost overruns and extended project schedules.
- Shortage of Skilled Manpower
- India's planned expansion from the current nuclear fleet to 100 GW will require a much larger pool of skilled professionals.
- At present, only around 300 qualified nuclear scientists and engineers graduate annually, while the sector is expected to require nearly 38,000 specialised personnel over the coming decades.
- This calls for significant expansion of nuclear education, training, and research programmes.
- Water Availability and Climate Risks
- Nuclear power plants require large quantities of water for reactor cooling.
- Increasing water scarcity, particularly at inland locations during summer, poses operational risks.
- In some cases, reactors may need to operate at reduced capacity to comply with environmental norms on cooling water discharge.
- Technology Challenges in Thorium-Based Reactors
- India's long-term nuclear strategy depends on the successful commercial deployment of thorium-based reactors under the third stage of its nuclear programme.
- Although the Prototype Fast Breeder Reactor (PFBR) is a key step towards this goal, commercial thorium reactor technology is still under development.
- Significant technological advances are required in thorium fuel utilisation, fuel reprocessing, and reactor design before large-scale deployment becomes feasible.
- Dependence on Imported Technology and Supply Chains
-
India continues to rely on international suppliers for critical equipment used in imported Light Water Reactors (LWRs).
-
Global geopolitical developments, such as the Russia–Ukraine conflict, have disrupted supply chains, delayed equipment deliveries, and complicated international payments.
-
Such external dependencies can affect project schedules and increase costs.
-
- Radioactive Waste Management
-
Safe management of radioactive waste, especially high-level waste generated from spent fuel reprocessing, remains a long-term challenge.
-
India is yet to establish a permanent Deep Geological Repository for the final disposal of high-level radioactive waste.
-
Environmental protection and public concerns over long-term waste storage continue to require careful attention.
-
- Nuclear Liability and Insurance Framework
- Although the SHANTI Act, 2025 has improved the investment environment, concerns remain regarding nuclear liability and insurance coverage.
- The India Nuclear Insurance Pool (INIP) provides insurance support, but premiums for private operators remain relatively high.
- Developing a balanced liability framework that protects public interest while encouraging private investment will be essential for expanding India's nuclear sector.
Ultimately, nuclear energy will play a crucial role in providing reliable baseload power and supporting grid stability by managing the daily "duck curve." However, achieving its full potential will require sustained policy support, significant public and private investment, technological innovation, and timely resolution of financial, regulatory, and operational challenges.
Authored by Kaushlandra Singh Yadav (Team Lead) and Varun Jain (Credit Analyst) SBI CHAKRA Centre of Excellence
Renewables Sectoral Insights
India is advancing a foundational energy shift with its commitment to installing 500 GW of non-fossil fuel capacity by 2030. The transition is anchored in two core technologies: solar and wind, which together are expected to comprise up to 80% of clean capacity by the end of the decade. This expansion is not only driven by decarbonization goals but also by energy security, growing electricity demand, and increasing corporate procurement of renewables. Policy reforms, digital grid upgrades, and the adoption of round-the-clock hybrid models are accelerating the sector’s evolution from capacity procurement to dispatchable clean energy delivery.
At the heart of this growth lies the solar sector, which is set to add ~145 GW by 2030. Domestic manufacturing is scaling under the Production Linked Incentive (PLI) scheme, with planned capacity additions across the polysilicon, wafer, cell, and module value chain. While downstream module assembly is gaining maturity, upstream inputs remain import-dependent, exposing developers to cost volatility. Policy instruments like the Approved List of Models and Manufacturers (ALMM) and customs duties aim to encourage self-reliance, but cost gaps versus Chinese imports persist. Solar deployment continues to be led by utility-scale projects, with innovations like floating solar and agrivoltaics gaining traction to address land constraints.
Wind power, historically a stronghold in India’s renewable mix, is set for a revival. Capacity is expected to double from ~56 GW to 100 GW by 2030, driven by hybrid tenders, repowering initiatives, and offshore wind policy frameworks. India maintains significant manufacturing capabilities across nacelles, blades, and towers, yet capacity utilization remains suboptimal due to weak domestic demand and limited tower infrastructure. Transmission congestion and delays in securing project approvals are key inhibitors. Addressing these bottlenecks through targeted investments in logistics-intensive components and faster permitting could unlock latent capacity and bolster export competitiveness.
Pumped Storage Projects (PSPs) are becoming essential for managing power supply changes and keeping the grid stable as we use more renewable energy. According to the Central Electricity Authority's (CEA) roadmap report published in January 2026, India has an estimated technical potential of about 267 GW, out of which ~96 GW of capacity is in various stages of planning and development. Because of this massive potential, PSPs are now being included in hybrid power projects to provide long-lasting energy storage. The business model for PSPs is improving, helped by benefits like must-run status, grid charge waivers, and viability gap funding. However, the sector still faces challenges like long building times, regulatory hurdles, and complex engineering needs at specific sites. To speed up PSP growth, the industry needs to shift toward closed-loop and modular reservoir designs, along with quicker approval processes.
Underpinning all segments is a broad policy architecture spanning central and state governments. Renewable Purchase Obligations (RPOs), open access reform, storage-linked tendering, and manufacturing incentives are driving demand and de-risking investment. States like Gujarat, Tamil Nadu, and Karnataka are leading with tailored policies on land allocation, repowering, and single-window clearances. However, uneven implementation across states and ambiguity around long-term tariff frameworks continue to affect investor confidence. Strengthening inter-agency coordination and codifying a national renewable energy law could enhance predictability and streamline project development.
As the sector matures, environmental, social, and governance (ESG) performance is emerging as a key differentiator. Developers with strong ESG credentials benefit from lower-cost capital, faster land acquisition, and improved community alignment. Policy shifts such as SEBI’s BRSR Core and blade recycling mandates are pushing ESG into mainstream compliance. Meanwhile, developers are addressing biodiversity risks, water usage, and material circularity through design innovations and local partnerships. Governance reforms around supply chain ethics, cybersecurity, and disclosure frameworks are reshaping stakeholder expectations.
Project bankability is improving as capital markets adapt to the unique contours of renewables. Financing instruments such as green bonds, sustainability-linked loans, and infrastructure investment trusts are gaining momentum. Project developers are de-risking cash flows through SECI-anchored power purchase agreements and payment security mechanisms, yet off-taker risk from state DISCOMs remains a concern. Manufacturing investments, particularly upstream, are still hindered by limited access to low-cost debt and tariff unpredictability, underscoring the need for capital structuring innovation and policy alignment.
India’s renewable energy sector is well-positioned to lead global Energy Transition efforts, but its success depends on how effectively policy, capital, infrastructure, and execution capabilities evolve in parallel. Scaling domestic manufacturing, closing infrastructure gaps, enforcing consistent regulation, and embedding ESG standards will be essential to converting policy ambition into durable growth and investment-grade outcomes.
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Last Updated On : Friday, 10-07-2026
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