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India targets 100 GW nuclear power capacity by 2047

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India aims to achieve 100 GW of nuclear power capacity by 2047 through expansion of indigenous reactor fleets, deployment of Small Modular Reactors (SMRs), and introduction of new regulatory frameworks allowing private participation under the SHANTI Act, 2025. Key milestones include operation of the Prototype Fast Breeder Reactor at Kalpakkam and approval of SMR projects at Tarapur, Maharashtra, aligning with the nation’s three-stage nuclear programme and supporting a low-carbon energy future.

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Key Facts

  • India’s nuclear power capacity target is 100 GW by the year 2047.
  • The three-stage nuclear power programme involves Pressurised Heavy Water Reactors (PHWRs), Fast Breeder Reactors, and Thorium-based systems.
  • Pressurised Heavy Water Reactors use natural uranium fuel with heavy water as moderator and coolant.
  • Small Modular Reactors (SMRs) include the 220 MWe Bharat SMR and the 55 MWe SMR-55, with lead units approved at Tarapur, Maharashtra.
  • The Prototype Fast Breeder Reactor at Kalpakkam, Tamil Nadu, attained first criticality in 2026, a key milestone.
  • The SHANTI Act, 2025 repealed earlier regulatory laws (Atomic Energy Act, 1962 and Civil Liability for Nuclear Damage Act, 2010) and introduced provisions for insurance frameworks, single composite licensing, and foreign-designed reactors under trusted approvals.
  • Private sector involvement includes Adani Power’s subsidiaries Rawatbhata-Raj Atomic Energy Ltd. and Coastal-Maha Atomic Energy Ltd. for potential projects in Rajasthan and Maharashtra.
  • Bhabha Atomic Research Centre (BARC) is India’s primary nuclear research institution; BHAVINI is responsible for fast breeder reactor projects.
  • Nuclear power is considered a low-carbon baseload source, critical to meeting increasing electricity demand from AI, semiconductor manufacturing, and data centers.

Background & Context

India's three-stage nuclear power programme leverages its domestic uranium resources in the first stage (via PHWRs), progresses to fast breeder reactors in the second stage to generate more fissile material, and plans to utilise thorium-based reactors in the third stage, capitalizing on the country's abundant thorium reserves. The Prototype Fast Breeder Reactor's success at Kalpakkam marks advancement in the second stage, improving fuel utilization and plutonium breeding. The development and approval of SMRs at Tarapur represent a shift towards modular, flexible nuclear power deployment, facilitating scaling capacity with potentially reduced construction times and investment.

The SHANTI Act, 2025, modernizes India's nuclear regulatory framework by repealing older laws, streamlining licensing, enabling private sector participation, and facilitating the operation of foreign-designed reactors under specified conditions. This legislative shift is intended to accelerate nuclear capacity expansion and technological diversity.

Why This Matters for Exams / Exam Relevance

This topic encompasses critical elements of India's strategic energy planning, technological innovation in nuclear power, and legal reforms that reflect evolving policy priorities. It is relevant for understanding India's approach to energy security, sustainable development goals, and technological self-reliance. The knowledge of key institutions, legislation like the SHANTI Act, reactor types, and milestones such as the first criticality of the fast breeder reactor is important for various competitive examinations covering energy, environment, and governance.

Points to Remember

  • India’s nuclear power capacity goal is 100 GW by 2047.
  • Three-stage nuclear programme stages: 1) PHWRs using natural uranium, 2) Fast Breeder Reactors for fuel breeding, 3) Thorium-based reactors.
  • First criticality signifies a self-sustaining nuclear chain reaction; Prototype Fast Breeder Reactor achieved this in 2026.
  • Tarapur approved for lead SMR units: 220 MWe Bharat SMR and 55 MWe SMR-55.
  • SHANTI Act, 2025 replaces Atomic Energy Act (1962) and Civil Liability for Nuclear Damage Act (2010), introduces private participation, composite licensing, and insurance framework.
  • Adani Power’s nuclear subsidiaries formed for projects in Rajasthan and Maharashtra.
  • BARC is the key nuclear research center; BHAVINI manages fast breeder reactor construction and operation.
  • SMRs allow modular, smaller-scale nuclear power deployment with flexibility in location and capacity addition.
  • Nuclear power contributes low-carbon baseload electricity, important with growth in AI, semiconductor, and data centre electricity demands.
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