Nuclear power plants in India generate approximately 7,480 MW of electricity across 7 operational sites — forming a critical part of India’s clean energy mix.
India’s nuclear power programme, governed by the Atomic Energy Commission and operated by Nuclear Power Corporation of India Limited (NPCIL), has a unique three-stage strategy designed to eventually utilise India’s vast thorium reserves. Nuclear energy locations, capacity, reactor types, and atomic history are consistently tested in UPSC Prelims, SSC CGL, Banking, and State PSC exams. This page gives you a complete, updated list with exam-critical facts for confident revision.
⚡ Quick Facts
- India has 22 operational nuclear reactors at 7 power plant sites, with a total installed capacity of approximately 7,480 MW (early 2026).
- Tarapur Atomic Power Station (Maharashtra) is India’s oldest nuclear power plant — operational since 1969.
- Kudankulam Nuclear Power Plant (Tamil Nadu), built with Russian assistance, is India’s largest by planned capacity (6,000 MW when fully complete).
- India is the only country with a three-stage nuclear programme designed to eventually utilise its large thorium reserves.
- The Atomic Energy Commission (AEC) was established in 1948 — just one year after Independence — under Dr. Homi Jehangir Bhabha.
Three frequent confusions: (1) Tarapur (Maharashtra, 1969) is the oldest — NOT Rawatbhata (Rajasthan, 1973). (2) Kudankulam (Tamil Nadu) is largest by planned capacity — NOT Tarapur. (3) Madras Atomic Power Station is at Kalpakkam (Tamil Nadu) — “Madras” refers to the old name, not the city location. Also: India is NOT a signatory to the NPT — this is a frequently tested negative fact. The PFBR at Kalpakkam represents Stage 2 — not Stage 3 — of India’s nuclear programme.
✅ My Progress Tracker
⚛️ India’s 7 Operational Nuclear Power Plants
| # ↕ | Plant ↕ | State ↕ | Since ↕ | Units | Capacity (MW) | Reactor | Key Exam Fact |
|---|---|---|---|---|---|---|---|
| 1 | Tarapur (TAPS) | Tarapur, Palghar, Maharashtra | 1969 | 4 units | 1,400 MW | BWR (U1&2); PHWR (U3&4) | India’s first & oldest NPP; built with US assistance; BWR units among first in Asia |
| 2 | Rawatbhata (RAPS) | Rawatbhata, near Kota, Rajasthan | 1973 | 6 units | 1,180 MW | PHWR (CANDU-type) | Built with Canadian assistance initially; near Chambal River; most units (6) at one station |
| 3 | Madras / Kalpakkam (MAPS) | Kalpakkam, Tamil Nadu | 1984 | 2 units | 440 MW | PHWR | India’s first fully indigenously built nuclear plant; PFBR (Stage 2 prototype) is at same site |
| 4 | Narora (NAPS) | Narora, Bulandshahr, Uttar Pradesh | 1991 | 2 units | 440 MW | PHWR | On the Ganga River; India’s first PHWR built entirely without foreign assistance |
| 5 | Kakrapar (KAPS) | Kakrapar, Surat, Gujarat | 1993 | 4 units | 1,840 MW (U1&2: 440 MW; U3&4: 700 MW each) | PHWR | Units 3 & 4 are India’s first 700 MW PHWR reactors — major indigenisation milestone |
| 6 | Kaiga (KGS) | Kaiga, Uttar Kannada, Karnataka | 2000 | 4 units | 880 MW | PHWR | In Western Ghats; Unit 1 set a world record for continuous operation (962 days) |
| 7 | Kudankulam (KKNPP) | Kudankulam, Tirunelveli, Tamil Nadu | 2013 | 2 operational; 4 under construction | 2,000 MW operational; 6,000 MW planned | VVER (Russian) | Built with Russian (Rosatom) assistance; largest by planned capacity (6,000 MW); Units 3–6 under construction |
🔨 Nuclear Plants Under Construction & Planned (2026)
| Plant | State | Units / Capacity | Reactor Type | Assistance |
|---|---|---|---|---|
| Kudankulam Units 3–6 | Tamil Nadu | 4 units × 1,000 MW | VVER | Russia (Rosatom) |
| Gorakhpur Haryana Anu Vidyut Pariyojana (GHAVP) | Haryana | 2 units × 700 MW | PHWR | Indigenous |
| Jaitapur Nuclear Power Project | Maharashtra (Ratnagiri) | 6 units × 1,650 MW = 9,900 MW | EPR | France (EDF / Framatome) |
| Kovvada Nuclear Power Plant | Andhra Pradesh | 6 units (AP1000) | AP1000 | USA (Westinghouse) |
| Chhaya-Mithi Virdi | Gujarat | 6 units (AP1000) | AP1000 | USA (Westinghouse) |
| Mahi Banswara | Rajasthan | 4 units × 700 MW | PHWR | Indigenous |
| Kaiga Units 5 & 6 | Karnataka | 2 units × 700 MW | PHWR | Indigenous |
Jaitapur (Ratnagiri, Maharashtra) — 6 × 1,650 MW EPR reactors = 9,900 MW total — will be the world’s largest nuclear power plant by capacity when completed. Collaboration with France’s EDF and Framatome. The project faces local opposition (seismically active zone, land concerns) and pending financial negotiations as of 2026.
🔬 India’s Three-Stage Nuclear Programme
Conceived by Dr. Homi Jehangir Bhabha to exploit India’s limited uranium but vast thorium reserves (world’s 2nd largest, after Brazil).
| Stage | Reactor Type | Fuel Input | Byproduct / Output | Status & Key Site |
|---|---|---|---|---|
| Stage 1 | PHWR (Pressurised Heavy Water Reactor) | Natural Uranium | Electricity + Plutonium-239 | ✅ Operational — all existing PHWRs (Tarapur, Rawatbhata, Madras, Narora, Kakrapar, Kaiga) |
| Stage 2 | FBR (Fast Breeder Reactor) | Plutonium-239 (from Stage 1) | Electricity + Uranium-233 (bred from Thorium) | 🔄 In Progress — PFBR at Kalpakkam achieved criticality 2024 |
| Stage 3 | AHWR (Advanced Heavy Water Reactor) | Thorium + Uranium-233 (from Stage 2) | Electricity — fully thorium-based | 🔮 Future — design phase; India’s long-term energy independence goal |
⚖️ Compare Two Nuclear Plants
📝 Key Notes & Memory Tips
India has the world’s second-largest thorium reserves (after Brazil) but very limited uranium. Dr. Homi Bhabha designed a three-stage path to eventually transition to thorium: Stage 1 (PHWRs using natural uranium → generates Pu-239 byproduct) → Stage 2 (FBRs using Pu-239 → breeds U-233 from thorium) → Stage 3 (AHWRs using thorium + U-233 → fully thorium-based energy). India is currently transitioning from Stage 1 to Stage 2. The Prototype Fast Breeder Reactor (PFBR) at Kalpakkam achieved criticality in 2024 — India’s Stage 2 milestone.
- AEC (Atomic Energy Commission): Apex policy body; established 1948; chaired by PM of India
- DAE (Department of Atomic Energy): Executes nuclear policy; reports directly to PM
- NPCIL (Nuclear Power Corporation of India Ltd): PSU under DAE; builds and operates all nuclear plants
- BARC (Bhabha Atomic Research Centre): Nuclear R&D; Trombay, Mumbai; India’s premier nuclear lab
- IGCAR (Indira Gandhi Centre for Atomic Research): Kalpakkam, Tamil Nadu; focuses on fast reactor technology
- AMD (Atomic Minerals Directorate): Surveys and explores nuclear minerals in India
- Pokhran-I “Smiling Buddha” (1974): India’s first nuclear test; Rajasthan desert; PM Indira Gandhi; shocked the world; made India a de facto nuclear state
- Pokhran-II “Operation Shakti” (1998): Series of 5 tests in May 1998; PM Atal Bihari Vajpayee; India officially declared nuclear weapons state; led to US and international sanctions
- India is NOT a signatory to the NPT (Non-Proliferation Treaty) — nor is Pakistan or Israel. All three are de facto nuclear states outside the NPT framework.
- PHWR (Pressurised Heavy Water Reactor): India’s main type; natural uranium fuel; heavy water (D₂O) moderator; CANDU-derived; now fully indigenised at 220 MW and 700 MW scale
- BWR (Boiling Water Reactor): Used at Tarapur Units 1 & 2; US design (GE); uses enriched uranium
- VVER: Russian pressurised water reactor; used at Kudankulam; highly efficient; 1,000 MW per unit
- FBR (Fast Breeder Reactor): Prototype at Kalpakkam (PFBR); liquid sodium coolant; Stage 2 milestone
- EPR (European Pressurised Reactor): Planned for Jaitapur (France); 1,650 MW per unit — largest civilian reactor type
The 123 Agreement (2008) under PM Manmohan Singh allowed India to access civilian nuclear technology and fuel from the world for the first time — despite India not signing the NPT. It was a historic diplomatic achievement that required a special waiver from the Nuclear Suppliers Group (NSG). This agreement facilitated Russia’s Kudankulam, France’s Jaitapur, and the USA’s Kovvada/Chhaya-Mithi Virdi projects. It was negotiated through a landmark deal with the Bush administration and is seen as one of the most significant foreign policy achievements of the Manmohan Singh era.
7 Operational Plants — Oldest to Newest: “TR MN KKK”
T = Tarapur (1969) | R = Rawatbhata (1973) | M = Madras/Kalpakkam (1984) | N = Narora (1991) | K = Kakrapar (1993) | K = Kaiga (2000) | K = Kudankulam (2013)
Three-Stage Programme: “Uranium → Plutonium → Thorium”
Stage 1 (PHWR, Uranium) → Stage 2 (FBR, Plutonium → breeds Uranium-233) → Stage 3 (AHWR, Thorium + U-233)
Two Nuclear Tests: “Smiling Buddha 1974 Indira | Operation Shakti 1998 Vajpayee”
🃏 Flashcards
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🧩 Practice Quiz
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Tarapur Atomic Power Station (TAPS) in Tarapur, Maharashtra, commissioned in 1969, is India’s oldest nuclear power plant. Built with US assistance using Boiling Water Reactor (BWR) technology from General Electric, it was also among the first BWR plants in Asia. Two PHWR units were added later, bringing its total capacity to 1,400 MW.
Kudankulam Nuclear Power Plant (KKNPP) was built with Russian assistance under an inter-governmental agreement with Russia’s Rosatom. It uses VVER-1000 type pressurised water reactors. The first unit became operational in 2013 and the second in 2017. Units 3–6 (1,000 MW each) are currently under construction, which will take Kudankulam’s total planned capacity to 6,000 MW.
India’s three-stage nuclear programme, designed by Dr. Homi Bhabha, was created to exploit India’s vast thorium reserves — the world’s second largest (after Brazil). Since India has limited uranium but enormous thorium deposits, the three-stage plan transitions through PHWRs (Stage 1) and Fast Breeder Reactors (Stage 2) to ultimately reach Advanced Heavy Water Reactors (Stage 3) that run on thorium.
The Prototype Fast Breeder Reactor (PFBR) is located at Kalpakkam in Tamil Nadu — the same site as the Madras Atomic Power Station (MAPS). It is India’s first Fast Breeder Reactor and represents Stage 2 of India’s three-stage nuclear programme. It uses liquid sodium as coolant and breeds Uranium-233 from thorium. The PFBR achieved first criticality in 2024.
India conducted five nuclear tests — “Operation Shakti” — at Pokhran, Rajasthan in May 1998 under PM Atal Bihari Vajpayee. India officially declared itself a nuclear weapons state. The tests led to international sanctions from the USA. India’s first nuclear test was “Smiling Buddha” (Pokhran-I) in 1974 under PM Indira Gandhi.
✅ Key Takeaways
❓ Frequently Asked Questions
India has 7 operational nuclear power plant sites with 22 reactors and a total installed capacity of approximately 7,480 MW as of early 2026. These are: Tarapur (Maharashtra, 1969), Rawatbhata (Rajasthan, 1973), Kalpakkam/Madras (Tamil Nadu, 1984), Narora (Uttar Pradesh, 1991), Kakrapar (Gujarat, 1993), Kaiga (Karnataka, 2000), and Kudankulam (Tamil Nadu, 2013). Several more are under construction or planned — including Jaitapur in Maharashtra (with France), Kovvada in Andhra Pradesh (with USA), and additional units at existing sites.
India’s three-stage nuclear programme, conceived by Dr. Homi Bhabha, is a long-term strategy to exploit India’s limited uranium but massive thorium reserves. Stage 1: PHWRs using natural uranium — generate electricity while producing plutonium-239. Stage 2: Fast Breeder Reactors (FBRs) using plutonium from Stage 1 — breed uranium-233 from thorium while generating electricity. The PFBR at Kalpakkam represents this stage. Stage 3: Advanced Heavy Water Reactors (AHWRs) fuelled by thorium and uranium-233 — making India energy-independent using its own thorium. India has the world’s second-largest thorium reserves, making Stage 3 particularly strategic.
India is NOT a signatory to the NPT. India refused to sign on the grounds that it is discriminatory — dividing the world into nuclear weapons states (five permanent UN Security Council members) and non-nuclear states. India, Pakistan, and Israel are the three countries with nuclear weapons that have never signed the NPT. Despite this, India secured a landmark exception — the Indo-US Civil Nuclear Agreement (123 Agreement) in 2008 under PM Manmohan Singh — which allowed India to participate in civilian nuclear commerce globally without signing the NPT. This opened the door for Russia’s Kudankulam, France’s Jaitapur, and USA’s Kovvada projects in India.
Nuclear power plants are tested in UPSC Prelims (Geography, Science & Technology, Environment), SSC CGL, Banking General Awareness, and State PSC exams. Key tested facts include India’s oldest nuclear plant (Tarapur, Maharashtra, 1969), largest by planned capacity (Kudankulam, Tamil Nadu, Russian assistance), the three-stage nuclear programme (uranium → plutonium → thorium), the PFBR at Kalpakkam as Stage 2 prototype, India’s nuclear tests (Pokhran-I 1974 “Smiling Buddha” and Pokhran-II 1998 “Operation Shakti”), the Indo-US Civil Nuclear Agreement (2008), India’s non-NPT status, key institutions (AEC, DAE, NPCIL, BARC), and upcoming projects (Jaitapur with France at 9,900 MW). State-wise locations of all 7 plants are also tested in geography sections.
