CLAT-2027 Blog

Kalpakkam Fast Breeder Reactor: PFBR-500 Criticality (CLAT 2027)

PFBR-500 Kalpakkam Fast Breeder Reactor criticality

CURRENT AFFAIRS | 27 APRIL 2026

SCIENCE, TECHNOLOGY & NUCLEAR LAW | ATOMIC ENERGY ACT 1962

In his Mann Ki Baat broadcast on 26 April 2026, Prime Minister Narendra Modi hailed the Prototype Fast Breeder Reactor (PFBR-500) at Kalpakkam, Tamil Nadu, attaining criticality — its first self-sustaining nuclear chain reaction. The fully indigenous reactor marks India’s formal entry into Stage 2 of Dr Homi Bhabha’s three-stage civil nuclear programme, the doctrinal framework that has guided India since the 1950s: PHWRs (Stage 1, uranium) → Fast Breeders (Stage 2, plutonium) → Thorium reactors (Stage 3).

The PM also celebrated wind capacity crossing 56 GW, the return of blackbucks to Chhattisgarh, the Great Indian Bustard conservation push, and India’s win at the European Girls Mathematical Olympiad. For CLAT 2027 this is a clean GK + International Treaty + Article 51 DPSP cluster.

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Constitutional & Legal Framework

  • Atomic Energy Act, 1962 — vests exclusive control of atomic energy in the Union (Schedule VII, List I, Entry 6)
  • Civil Liability for Nuclear Damage Act, 2010 — operator liability cap (Rs 1,500 crore); Section 17(b) supplier-recourse clause
  • IAEA Additional Protocol — signed 2009, in force 2014
  • India-US 123 Agreement (2008) — civil nuclear cooperation under US Atomic Energy Act 1954 + Hyde Act 2006
  • NSG Waiver (Sept 2008) — India is NOT an NSG member but received a special exemption
  • Article 51 DPSP — promote international peace, treaty obligations, dispute arbitration
  • Wildlife Protection Act, 1972 — Schedule I covers Great Indian Bustard (highest protection)
  • MK Ranjitsinh v UoI (2024) — right against adverse climate effects under Article 21 (cited in GIB case)

Why This Matters for CLAT 2027

  • Three-stage nuclear doctrine appears regularly in CLAT factual GK and S&T sections
  • India’s NPT-outsider status with NSG waiver is a perennial international-law passage
  • CLND Act’s Section 17(b) is a contracts/tort question (supplier liability)
  • Article 51 DPSP linkage to nuclear diplomacy is a high-yield short answer
  • Mann Ki Baat clusters reward students who index multiple facts (wind 56 GW, GIB, EGMO) into a single answer

Key Facts at a Glance

Item Detail
Reactor PFBR-500 (Prototype Fast Breeder, 500 MWe)
Location Kalpakkam, Tamil Nadu
Operator / Builder BHAVINI (DAE PSU)
Stage marker Stage 2 of Bhabha’s 3-stage programme
Wind capacity Crossed 56 GW (target: 500 GW non-fossil by 2030)
Other Mann Ki Baat highlights Blackbucks Chhattisgarh, GIB conservation, EGMO win

Mnemonic — “BHABHA-PFBR”

Bhabha’s 3-stage doctrine · HWR Stage 1 · Atomic Energy Act 1962 · BHAVINI builder · Hyde Act 2006 (US side) · Additional Protocol 2014. Then PFBR: Prototype · Fast · Breeder · Reactor — 500 MWe at Kalpakkam.

Implications & The Road Ahead

PFBR-500 criticality unlocks the path to commercial fast breeders and ultimately to thorium-based reactors — critical for India’s 500 GW non-fossil capacity target by 2030 under the updated Nationally Determined Contributions (NDCs). Watch for: (1) the Nuclear Energy Mission announced in Budget 2025-26 with Rs 20,000 crore outlay, (2) amendments to CLND Act Section 17(b) to enable foreign reactor deals (US-Westinghouse, French-Framatome), and (3) ongoing efforts for full NSG membership.

Test Your Understanding — 10 CLAT-Style MCQs

Apply the constitutional anchors and current-affairs facts above. Each question has a detailed explanation.

Practice Quiz — 10 CLAT-Style Questions

Click an option to reveal the answer and explanation.

Quick answers

India's three-stage civil nuclear programme was conceived by:
Homi J Bhabha. Dr Homi J Bhabha — father of India's nuclear programme — designed the three-stage strategy in the 1950s: PHWRs (Stage 1) -> FBRs (Stage 2) -> Thorium reactors (Stage 3).
The Prototype Fast Breeder Reactor (PFBR-500) at Kalpakkam attaining criticality marks the start of which stage?
Stage 2 (Fast Breeder). PFBR-500 inaugurates Stage 2 — fast breeder reactors that produce more fissile material than they consume, bridging India to its thorium-rich Stage 3.
India's nuclear programme is governed by which legislation passed in 1962?
Atomic Energy Act, 1962. The Atomic Energy Act, 1962 vests the Union with exclusive control over atomic energy under Schedule VII List I Entry 6, and is administered by the Department of Atomic Energy (DAE).
The Civil Liability for Nuclear Damage Act, 2010 fixes operator liability at how much?
Rs 1,500 crore. CLND Act, 2010 caps operator liability at Rs 1,500 crore (later raised); Section 17(b) controversially allows operator to recoup from suppliers — a key sticking point in foreign reactor deals.
India ratified the IAEA Additional Protocol enabling enhanced safeguards in:
2014. India signed the Additional Protocol in 2009 and brought it into force in 2014 — a precondition under the India-US 123 Agreement and NSG waiver discussions.
The India-US 123 Agreement, signed in 2008, allows civil nuclear cooperation under which US legislation?
Both A and C. It is a bilateral agreement under Section 123 of the US Atomic Energy Act 1954, made possible by the Henry J Hyde Act 2006 which created an India-specific exemption.
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