India’s Nuclear Expansion Raises Long-Term Challenges of Radioactive Waste Management, Financing and Institutional Responsibility

Recent Developments:

• India’s Nuclear Energy Mission aims to raise nuclear power capacity to 100 GW by 2047, increasing the role of nuclear energy as a reliable, low-carbon baseload source while supporting the Net Zero target for 2070. The expansion also envisages wider participation of the private sector.
• The SHANTI Act, 2025 has enabled wider public and private participation in the nuclear power sector while modernising the legal framework for nuclear energy, safety and liability. Sensitive nuclear fuel-cycle activities continue to remain under sovereign control.
• As of 2026, India’s installed nuclear power capacity was 8.78 GW, with the government roadmap targeting about 22 GW by 2031–32 and 100 GW by 2047. The roadmap envisages contributions from NPCIL, other public-sector entities, private companies and joint ventures.
• The expansion of nuclear capacity increases the importance of spent-fuel management, radioactive-waste conditioning, interim storage, decommissioning and eventual geological disposal over much longer time horizons than the operating life of individual reactors.

Radioactive Waste Management: Concept and India’s Approach:

Closed Fuel Cycle:

• In a conventional once-through fuel cycle, nuclear fuel is used in a reactor and the discharged spent fuel is ultimately treated as waste requiring long-term disposal.
• India follows a closed nuclear fuel cycle, under which spent fuel is reprocessed to recover uranium and plutonium for further utilisation. The approach is intended to maximise energy extraction from limited uranium resources and support the long-term transition towards thorium utilisation.
• Spent fuel is therefore not treated entirely as waste in the Indian system because it contains potentially reusable nuclear material.
• Reprocessing can substantially reduce the volume of high-level waste requiring geological disposal, but it does not eliminate radioactivity or the need for long-term isolation. According to the Atomic Energy Regulatory Board, only around 2–3% of reprocessed spent fuel ultimately becomes waste, while the remaining material can be recycled.

Nuclear Fuel and Radioactive-Waste Management Chain:

Cooling and Interim Storage:

• Freshly discharged fuel remains highly radioactive and thermally hot, requiring initial cooling in spent-fuel pools followed by appropriate interim storage arrangements.
• Interim storage provides time for radioactive decay, heat reduction and subsequent treatment before final disposal.

Reprocessing:

• Spent fuel can undergo chemical reprocessing to recover uranium and plutonium, which can subsequently support further fuel fabrication and the closed fuel cycle.
• Reprocessing also separates high-level radioactive residues from materials that can potentially be reused.

Waste Conditioning:

• Radioactive residues that cannot be reused are converted into stable and immobilised forms suitable for storage and disposal.
• High-level liquid radioactive waste can be immobilised through vitrification, in which radioactive material is incorporated into a stable glass matrix.
• India has continued to develop high-level waste-management technologies, including an advanced vitrification facility at Tarapur.

Final Disposal:

• Deep geological disposal is intended for long-lived high-level radioactive waste that requires isolation from the biosphere over very long periods.
• India’s regulatory framework recognises geological disposal as the eventual pathway for high-level waste, while the country continues to undertake technological and geological studies for such facilities.

Geological Repository: Long-Term Solution:

What is a Deep Geological Repository?

• A deep geological repository is an engineered facility designed to isolate long-lived radioactive waste deep underground within stable geological formations.
• Safety depends on a multi-barrier system, combining the waste form, engineered containers, surrounding materials and geological formations to prevent radionuclide migration.
• A geological repository differs from an interim storage facility because its primary purpose is long-term isolation rather than temporary holding.
• India has considered geological disposal for high-level waste, with repository planning linked to the volume, characteristics and long-term management strategy for radioactive waste.

Why Long-Term Radioactive-Waste Management Matters:

Intergenerational Responsibility:

• Radioactive waste can remain hazardous for very long periods, making its management fundamentally different from conventional industrial waste.
• Present-day nuclear expansion therefore creates responsibilities that may extend across several generations.

Financial Responsibility:

• Waste treatment, long-term storage, reactor decommissioning and geological disposal can generate significant costs decades after a nuclear plant begins operation.
• If adequate financial provisions are not created during the operating period, future governments and taxpayers may ultimately bear a disproportionate share of these costs.

Institutional Continuity:

• Nuclear reactors may operate for several decades, whereas radioactive-waste management and monitoring can continue for much longer.
• Responsibility must therefore remain clearly defined even if an operator changes ownership, exits the sector, becomes financially inactive or shuts down a reactor.

Emerging Concerns with Private Participation:

Defining Responsibility Across the Fuel Cycle:

• The expansion of private participation makes it necessary to clearly distinguish the responsibilities of private operators, public-sector entities, regulators and the government for spent fuel, radioactive waste, decommissioning and long-term disposal.
• The SHANTI Act enables wider participation while retaining sovereign control over sensitive areas of the nuclear fuel cycle.

Public Acceptance and Environmental Justice:

• Communities may oppose radioactive-waste facilities because of concerns regarding radiation exposure, environmental safety, land use, property values and long-term ecological risks.
• Transparent risk communication, independent monitoring and meaningful public consultation are therefore important for social acceptance.

Regulatory Continuity:

• The Atomic Energy Regulatory Board (AERB) regulates radioactive-waste management associated with nuclear and radiation facilities and reviews waste management across the lifecycle of nuclear power plants, from siting and construction to operation and decommissioning.
• Radioactive-waste disposal is governed by the Atomic Energy (Safe Disposal of Radioactive Wastes) Rules, 1987, under which authorisation is required for disposal.

India’s Three-Stage Nuclear Power Programme:

Stage I: Pressurised Heavy Water Reactors:

• India’s three-stage nuclear programme was conceptualised under Dr Homi Jehangir Bhabha to maximise energy extraction from limited uranium resources and progressively utilise India’s large thorium resources.
• The first stage is based primarily on Pressurised Heavy Water Reactors (PHWRs) using natural uranium as fuel and heavy water as moderator and coolant.
• Natural uranium contains predominantly Uranium-238 (U-238) with a small fraction of fissile Uranium-235 (U-235).
• A major objective of Stage I is to generate Plutonium-239 (Pu-239) from U-238 during reactor operation. Pu-239 subsequently serves as an important fuel for the second stage.
• India’s indigenous PHWR programme has become a major component of the current nuclear expansion strategy, including the deployment of 700 MWe PHWRs.

Stage II: Fast Breeder Reactors:

• The second stage is based on Fast Breeder Reactors (FBRs), which use fast neutrons and are designed to produce more fissile material than they consume.
• The Prototype Fast Breeder Reactor (PFBR) at Kalpakkam uses uranium-plutonium mixed-oxide fuel and a U-238 blanket.
• Fast neutrons convert U-238 into Pu-239, thereby increasing the availability of fissile material.
• The reactor design can also use Th-232 in the blanket, which can be converted through nuclear transmutation into U-233, providing the bridge towards the third stage.
• The government has approved pre-project activities for 2 × 500 MW Fast Breeder Reactors at Kalpakkam based on the PFBR design.

Stage III: Thorium-Based Reactors:

• The third stage seeks to utilise India’s substantial thorium resources for large-scale nuclear energy generation.
• Thorium-232 (Th-232) is fertile rather than fissile; it is converted into fissile Uranium-233 (U-233) through neutron irradiation.
• U-233 can subsequently serve as nuclear fuel, creating a thorium-based fuel cycle.
• The Advanced Heavy Water Reactor (AHWR) has been developed as an important technology demonstration for this stage, combining thorium-based fuel with advanced safety features.
• The three-stage programme therefore creates a strategic sequence: natural uranium and PHWRs → plutonium and fast breeders → thorium and U-233.

Way Forward:

Create Dedicated Financial Provisions:

• A dedicated nuclear-waste management fund can be considered, with contributions linked to electricity generation and accumulated throughout the operating life of nuclear facilities.
• Such provisions can support future spent-fuel management, transportation, decommissioning, long-term storage and geological disposal rather than shifting the entire burden to future taxpayers.

Define Private-Sector Obligations:

• Nuclear regulations should clearly specify the financial, operational and liability responsibilities of private operators for spent fuel and radioactive waste.
• Contracts and licences should ensure that waste-management obligations remain enforceable even after ownership changes or plant closure.

Begin Early Repository Planning:

• India does not necessarily need immediate large-scale construction of a geological repository, but it should undertake systematic site identification, geological characterisation, safety assessment, technology development and public consultation well before disposal becomes necessary.
• Long-term planning is particularly important because geological repositories require extensive scientific assessment and societal consensus.

Apply the Polluter-Pays Principle:

• The costs associated with radioactive waste should be internalised into the economics of nuclear electricity rather than being transferred entirely to future generations.
• Financial mechanisms should reflect the full lifecycle cost of nuclear power, including waste management and decommissioning.

Conclusion:

India’s nuclear expansion is increasingly linked to energy security, decarbonisation and long-term technological self-reliance, but a larger nuclear fleet also creates obligations extending far beyond reactor operation. India’s closed fuel cycle reduces the volume of high-level waste and enables recovery of uranium and plutonium, while vitrification and engineered storage provide intermediate management pathways. However, long-lived high-level waste ultimately requires durable isolation. The combination of private-sector participation, the 100 GW nuclear target, the three-stage nuclear programme and emerging fast-breeder capacity therefore makes financial provisioning, regulatory continuity, institutional accountability and geological-disposal planning central to India’s nuclear policy.

Value Addition for UPSC:

• GS-I: Scientific developments, nuclear technology and India’s technological evolution.
• GS-III: Nuclear energy, energy security, radioactive-waste management, environmental protection and low-carbon development.
• GS-II: Regulatory institutions, public accountability, private-sector participation and intergenerational governance.
• Prelims Facts: Atomic Energy Commission — 1948; Apsara — 1956; Tarapur Atomic Power Station — 1969; Nuclear Energy Mission — 100 GW by 2047; SHANTI Act — 2025; PFBR — 500 MW; India’s nuclear programme — three stages.
• Conceptual Chain: PHWR → Pu-239 → FBR → U-233 → Thorium-based third stage.
• Core UPSC Insight: India’s nuclear-energy transition is not complete when electricity is generated; responsible nuclear governance extends across the entire fuel cycle, including spent fuel, radioactive waste, decommissioning, financing and final disposal.