India's Nuclear Programme — UPSC Static GK — UPSC Notes

🏛️ Key Institutions

Institution	Founded	Key Detail
Atomic Energy Commission (AEC)	August 1948	First Chairman: Homi J. Bhabha. Set up under Dept. of Scientific Research (est. June 1948). Reconstituted under DAE on 1 March 1958 — Secretary of DAE is now ex-officio Chairman of AEC.
Department of Atomic Energy (DAE)	3 August 1954	Established by Presidential Order under direct charge of PM Jawaharlal Nehru. PM holds charge of DAE to this day. Not under any ministry — reports directly to PM.
BARC — Bhabha Atomic Research Centre	1954	Trombay, Mumbai. Premier nuclear research centre. Nuclear fuel cycle R&D, reactor design, isotope production.
NPCIL — Nuclear Power Corporation of India Ltd	1987	Mumbai. Designs, builds, and operates all PHWRs and Kudankulam (VVER). Public sector enterprise under DAE.
IGCAR — Indira Gandhi Centre for Atomic Research	1971	Kalpakkam, Tamil Nadu. FBR (Fast Breeder Reactor) technology R&D. Designed the PFBR.
BHAVINI — Bharatiya Nabhikiya Vidyut Nigam Ltd	2003	Chennai. Stage 2 operator — operates PFBR and future FBRs.
UCIL — Uranium Corporation of India Ltd	1967	Jaduguda, Jharkhand (Singhbhum district). Uranium mining, milling, processing.
AERB — Atomic Energy Regulatory Board	November 1983	Mumbai. Nuclear safety regulator. Derives authority from Atomic Energy Act, 1962. Functions under AEC — not fully independent (unlike NRC in USA). This is a known governance concern.
NFC — Nuclear Fuel Complex	1971	Hyderabad, Telangana. Fabricates nuclear fuel assemblies and reactor components.

⚛️ Three-Stage Nuclear Programme

Conceived by Homi J. Bhabha in 1954. Rationale: India has only ~1–2% of global uranium reserves but ~25% of global thorium reserves. The programme is designed to first build a fissile inventory using uranium, then exploit India's vast thorium deposits.

Stage	Reactor Type	Fuel In	By-product / Bred Fuel	Current Status
Stage 1	Pressurised Heavy Water Reactors (PHWRs)	Natural uranium (0.7% U-235)	Plutonium-239 (Pu-239) — bred from U-238	Mostly complete — 18+ PHWRs operational
Stage 2	Fast Breeder Reactors (FBRs)	MOX fuel (Pu-239 from Stage 1 reprocessing + natural uranium); Th-232 as blanket	More Pu-239 (breeds more than consumed) + U-233 (from Th-232 blanket, for Stage 3)	Beginning — PFBR (500 MWe) at Kalpakkam: core loading started 4 March 2024; AERB granted criticality approval July 2024
Stage 3	Advanced Heavy Water Reactors / Thermal Breeders	U-233 (from Stage 2) + Th-232	Self-sustaining Th-232/U-233 cycle — near-inexhaustible thorium fuel	Future

PFBR milestone: PM Modi witnessed commencement of core loading at PFBR (500 MWe, sodium-cooled) at Kalpakkam on 4 March 2024 — India's formal entry into Stage 2. AERB granted "First Approach to Criticality" approval on 31 July 2024. Commercial power generation anticipated ~2026.

💥 Nuclear Tests — Pokhran

Parameter	Pokhran-I (1974)	Pokhran-II (1998)
Code name	Smiling Buddha	Operation Shakti
Date(s)	18 May 1974 (8:05 AM IST)	11 May 1998 (3 tests) + 13 May 1998 (2 tests)
Total detonations	1	5
Location	Pokhran Test Range, Rajasthan	Pokhran Test Range, Rajasthan
PM at the time	Indira Gandhi	Atal Bihari Vajpayee
Device type	Fission (implosion-type) only — NO thermonuclear	Thermonuclear/H-bomb (~45 kt) + fission (~15 kt) + 3 sub-kiloton devices
India's stated purpose	"Peaceful Nuclear Explosion" (PNE)	Nuclear weapons programme — India declared itself a Nuclear Weapons State (NWS)
Key scientists	Raja Ramanna (BARC), Homi Sethna (AEC)	A.P.J. Abdul Kalam (DRDO), R. Chidambaram (AEC), K. Santhanam (DRDO)
International consequence	Formation of Nuclear Suppliers Group (NSG) 1974–75	Sanctions from USA, Japan; Pakistan tested within 2 weeks (28 May 1998, Chagai-I)
Commemoration	—	11 May declared National Technology Day

India's distinction: India was the first country outside the UN P-5 (USA, USSR, UK, France, China) to test a nuclear device — in 1974.

⚡ Nuclear Power Plants — Operational (as of 2025)

Total operational capacity: ~8,880 MW across 25 reactors at 7 plants. Nuclear contributes ~3% of India's total electricity generation. All plants operated by NPCIL except PFBR (operated by BHAVINI).

Plant	State	Reactor Type	Units / Capacity	Key Notes
Tarapur (TAPS)	Maharashtra	Units 1–2: BWR (US-supplied); Units 3–4: PHWR	4 units / 1,400 MW	India's oldest nuclear plant — commissioned 1969. Only BWRs in India (Units 1–2, US-supplied, 160 MW each).
Rawatbhata / RAPS (Rajasthan Atomic Power Station)	Rajasthan	Units 1–2: CANDU (Canada-supplied); Units 3–6: PHWR (indigenous); Units 7–8: IPHWR-700	8 units / ~2,880 MW	Oldest PHWR in India. First CANDU-type. Unit 7 (700 MW) connected to grid March 2025.
Kalpakkam / MAPS (Madras Atomic Power Station)	Tamil Nadu	PHWR	2 units / 440 MW	Also hosts the PFBR (500 MWe FBR, operated by BHAVINI — a separate facility on the same site).
Narora (NAPS)	Uttar Pradesh	PHWR	2 units / 440 MW	Commercial operation: 1991 (Unit 1), 1992 (Unit 2)
Kakrapar (KAPS)	Gujarat	Units 1–2: PHWR 220 MW; Units 3–4: IPHWR-700	4 units / 1,840 MW	Units 3 & 4: India's first indigenous 700 MW PHWRs. Unit 4 declared commercial 2024.
Kaiga (KGS)	Karnataka	PHWR	4 units / 880 MW	First nuclear plant with 4 units of PHWR
Kudankulam (KKNPP)	Tamil Nadu	VVER-1000 (Russian PWR)	2 operational / 2,000 MW; 4 under construction	India-Russia collaboration. Largest operational nuclear plant in India (2,000 MW). 6,000 MW total planned (6 units). VVER is a Pressurised Water Reactor — not a PHWR.

Under Construction / Planned

Plant	State	Type	Capacity	Status
Kudankulam Units 3–6	Tamil Nadu	VVER-1000	4×1,000 MW	Units 3 & 4 ~73–76% complete; Unit 3 expected 2026
Gorakhpur (GHAVP)	Haryana (Fatehabad)	IPHWR-700	4×700 MW = 2,800 MW	Under construction; Phase 1 target ~2031
Jaitapur	Maharashtra (Ratnagiri)	EPR (French, by EDF)	6×1,650 MW = 9,900 MW	Pre-construction/negotiations; if built, would be world's largest NPP by net capacity
10 new PHWRs (Cabinet approved)	Multiple states	IPHWR-700	10×700 MW = 7,000 MW	Approved by Cabinet; sites across Rajasthan, Gujarat, Tamil Nadu, others

🌐 India's Nuclear Treaty Status

Treaty / Agreement	India's Status	Key Details
NPT (Nuclear Non-Proliferation Treaty)	NOT a signatory	India considers NPT discriminatory — divides world into 5 NWS (with pre-1967 tests) and all others. India, Pakistan, Israel, and South Sudan are outside NPT.
CTBT (Comprehensive Test Ban Treaty)	Not signed, not ratified	India has maintained a voluntary moratorium on testing since 1998 but has not signed CTBT. Pakistan is in the same position.
India-US Civil Nuclear Deal (123 Agreement)	Signed 8 October 2008	Allows US to supply nuclear fuel and technology to India despite India not being in NPT. Named after Section 123 of US Atomic Energy Act 1954.
NSG Waiver	Received 6 September 2008	NSG unanimously granted India a waiver at Vienna — allowing India to conduct civilian nuclear commerce globally without NPT membership. NSG was formed in 1974–75 because of India's Pokhran-I test.
NSG Membership	Pending (applied 2016)	NSG guideline requires NPT membership. India applied in 2016 — opposed by China, New Zealand, Ireland, South Africa, Austria. No resolution as of 2025.
IAEA India-Specific Safeguards	In force 2008	India voluntarily placed civilian nuclear facilities under IAEA safeguards. Military facilities remain outside.
IAEA Additional Protocol	Signed May 2009; in force 25 July 2014	India's AP is non-standard — does NOT include full complementary access provisions (which allow inspection of undeclared facilities). India's AP has broad exemptions for non-civilian activities.

📊 Key Facts at a Glance

Parameter	Fact
AEC founded	August 1948 (first Chairman: Homi J. Bhabha)
DAE founded	3 August 1954 (under PM Nehru; PM holds charge to this day)
Three-stage programme conceived	1954, by Homi J. Bhabha
Stage 2 commencement	PFBR core loading 4 March 2024 (Kalpakkam); criticality approval July 2024
Oldest nuclear plant	Tarapur, Maharashtra (commissioned 1969); only BWRs in India
Largest nuclear plant (operational)	Kudankulam, Tamil Nadu (2,000 MW; VVER-1000)
Operational nuclear capacity (2025)	~8,880 MW; 25 reactors; 7 plants
Nuclear share of electricity	~3% (FY 2024–25: 56.7 TWh — record)
Nuclear doctrine	No First Use (NFU) + Credible Minimum Deterrence; declared 1998
Nuclear warheads (SIPRI Jan 2025)	~180 stored warheads
India's thorium reserves	Largest in world (~25% of global; ~519,000–850,000 tonnes as monazite sand)
Thorium deposit locations	East and southwest coastlines — Kerala, Tamil Nadu, Andhra Pradesh, Odisha
Nuclear target by 2047	100 GW nuclear capacity (Viksit Bharat energy roadmap)
Nuclear Energy Mission (Budget 2025–26)	Funding for at least 5 indigenous SMRs (Small Modular Reactors) to be operational by 2033

⚠️ Exam Traps

Confusion / Trap	Correct Answer
AEC founded in 1954?	No. AEC was founded in 1948. DAE was founded in 1954. AEC was reconstituted under DAE in 1958. Three distinct dates.
PM is Chairman of AEC?	No. PM holds charge of DAE. The Secretary of DAE is the ex-officio Chairman of AEC.
Pokhran-I was a weapons test?	India called it a "Peaceful Nuclear Explosion" — not officially a weapons test. India did not declare itself a NWS after Pokhran-I. It did so only after Pokhran-II (1998).
Pokhran-I included a thermonuclear device?	No. Pokhran-I (1974) was a fission device only. The thermonuclear test claim came with Pokhran-II (1998).
India signed NPT but withdrew?	India never signed NPT. It is not a signatory and has no plans to join.
India signed but didn't ratify CTBT?	India has not signed CTBT at all (neither signed nor ratified). It maintains a voluntary testing moratorium, which is different.
NSG waiver = NSG membership?	No. NSG waiver was received in 2008 (allowing nuclear trade). NSG membership was applied for in 2016 and is still pending.
BARC is at Kalpakkam?	No. BARC is at Trombay, Mumbai. IGCAR is at Kalpakkam (Tamil Nadu). BARC does nuclear research; IGCAR specialises in FBR technology.
MAPS and PFBR are the same facility?	No. MAPS (Madras Atomic Power Station — 2 PHWRs, 220 MW each, operated by NPCIL) and PFBR (500 MWe FBR, operated by BHAVINI) are separate reactors at the same Kalpakkam site.
Tarapur uses only PHWR?	Partially wrong. Units 1 & 2 are BWRs (US-supplied, 160 MW each). Units 3 & 4 are PHWRs (540 MW each). Tarapur has India's only BWRs.
Kudankulam is a PHWR?	No. Kudankulam uses VVER-1000 — a Russian-designed Pressurised Water Reactor (PWR). Different from PHWR (which uses heavy water as moderator and coolant).
India's thorium is "second largest"?	Current official/DAE position: India has the largest thorium reserves (~25% globally). Some older estimates placed Australia ahead — for UPSC, use "largest."
NSG was formed in 1975 because of Pakistan?	No. NSG was formed in 1974–75 directly in response to India's Pokhran-I test (1974). It was India's test that catalysed the group.
India has ~150 nuclear warheads?	Outdated. SIPRI Yearbook 2025: India has ~180 stored warheads as of January 2025 — now more than Pakistan (~170).