India’s nuclear power programme is entering its second stage as the 500 MW Prototype Fast Breeder Reactor (PFBR) at Kalpakkam, Tamil Nadu, approaches commissioning. Built by Bharatiya Nabhikiya Vidyut Nigam Ltd (BHAVINI), the sodium-cooled reactor burns plutonium-based mixed-oxide fuel made from the spent fuel of India’s pressurised heavy water reactors and breeds more fissile material than it consumes – the bridge to the thorium-based third stage envisaged by Homi Bhabha in 1954.
Context
- The Department of Atomic Energy expected the PFBR to reach first criticality in 2025-26 and full commissioning by September 2026; core loading began on 4 March 2024 in the presence of the Prime Minister.
- In July 2023 the Atomic Energy Regulatory Board (AERB) cleared fuel loading, the first approach to criticality and low-power physics experiments.
- India’s installed nuclear capacity was about 8.18 GW, with 7.30 GW under construction or commissioning and 7 GW at the pre-project stage – a target of 22.48 GW by 2031-32.
The Three-Stage Programme
- Stage I – PHWRs: pressurised heavy water reactors using natural uranium, with heavy water as moderator and coolant; the workhorse of Indian nuclear power (Rawatbhata, Kaiga, Kakrapar); the Russian-built VVERs at Kudankulam are light water reactors outside this line.
- Stage II – Fast Breeder Reactors: plutonium recovered from PHWR spent fuel is used as fuel; a blanket of uranium-238 and thorium breeds more plutonium and uranium-233.
- Stage III – Thorium reactors: uranium-233 bred from thorium powers reactors such as the Advanced Heavy Water Reactor, exploiting India’s large thorium reserves (about 25 per cent of the world’s).
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Get this PDF on WhatsApp — one tapor get the download link hereKey Features of the PFBR
- Capacity: 500 MWe; fuel: plutonium-uranium mixed oxide (MOX); coolant: liquid sodium; developer: BHAVINI (set up 2003), designed by IGCAR (Indira Gandhi Centre for Atomic Research), Kalpakkam.
- Fast neutrons (no moderator) and a breeding ratio above one; the reactor closes the fuel cycle by using spent fuel that would otherwise be waste.
- It follows the 40 MWt Fast Breeder Test Reactor (1985) at Kalpakkam; two more 600 MW fast reactors are planned at the same site.
India's Nuclear Roadmap
- Long-term goal: about 55 GW through 15.40 GW of indigenous PHWRs, 17.60 GW of light water reactors with foreign cooperation, 3.80 GW of fast breeder reactors, and small modular reactors and Bharat Small Reactors with private participation.
- The Nuclear Energy Mission (Budget 2025-26, Rs 20,000 crore) targets 100 GW by 2047 and at least five indigenous SMRs by 2033, with amendments to the Atomic Energy Act and the Civil Liability for Nuclear Damage Act to let private firms in.
Strategic Significance
- Closed fuel cycle: fast breeders multiply the energy extracted from India’s limited uranium many times over.
- Energy security: less dependence on imported uranium; clean energy: baseload power without carbon emissions.
- Self-reliance: the PFBR is almost entirely indigenously designed and built.
Important Facts for Examsmost asked
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- PFBR: 500 MW, Kalpakkam (Tamil Nadu), BHAVINI; MOX fuel, sodium coolant; core loading 4 March 2024; AERB clearance July 2023.
- Three-stage programme (Homi Bhabha, 1954): PHWR – FBR – thorium reactors; India holds about a quarter of world thorium.
- Capacity: about 8.18 GW installed; target 22.48 GW by 2031-32; 100 GW by 2047 (Nuclear Energy Mission).
- Predecessor: Fast Breeder Test Reactor (1985), IGCAR.
FAQs
What does “breeder” mean?
A reactor that produces more fissile material (plutonium-239 or uranium-233) from fertile material (uranium-238 or thorium-232) than it consumes as fuel.
Why liquid sodium?
Sodium carries heat very efficiently and does not slow down neutrons, which fast reactors need; the trade-off is that it reacts violently with water and air, demanding careful engineering.
Why is the PFBR asked in exams?
It is the first Stage-II reactor of a programme that appears in every science and technology and energy-security section of RBI, NABARD and UPSC papers.
