UPSC Notes

Fast Breeder Reactors (FBRs)

PYQs

8

Articles

1

Momentum

21

Phase IFoundation

Background

Overview

Represents advanced nuclear technology, addresses fuel scarcity by breeding new fuel, potential for waste reduction, and a critical component of India's long-term energy strategy.

Fast Breeder Reactors are advanced nuclear reactors that generate more fissile material than they consume, by converting fertile materials like Uranium-238 into fissile Plutonium-239, or Thorium-232 into Uranium-233, using fast neutrons.

Phase IIStatic core

Facts & tables

Key facts

Fuel

Typically Uranium-Plutonium Mixed Oxide (MOX) fuel.

Breeding

Converts Uranium-238 (fertile) into Plutonium-239 (fissile) in the blanket.

Neutrons

Uses fast (unmoderated) neutrons, unlike conventional thermal reactors.

Coolant

Often uses liquid sodium as a coolant due to its excellent heat transfer properties and low neutron moderation.

Reference table

Static syllabus anchors

TypeReference
Conceptual areaScience & Technology
Conceptual areaNuclear Technology
Conceptual areaEnergy Security

Reference table

Institutions & roles

BodyRole
Indira Gandhi Centre for Atomic Research (IGCAR)Designs and develops
Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI)Constructs and operates
Department of Atomic Energy (DAE)Oversees
Phase IIIExam lens

Prelims angle

Overview

Prelims angle: Conceptual understanding

Prelims angle: Factual recall

Quick revision

  • Breeds more fissile fuel (e.g., Pu-239 from U-238) than it consumes.
  • Uses fast neutrons and typically MOX fuel.
  • Liquid sodium is a common coolant.
  • PFBR at Kalpakkam is India's prototype.
  • Key to India's second stage nuclear program.

High-confidence PYQs

Topic timeline

Science & TechnologyNuclear TechnologyEnergy Security

PARLIAMENT QUESTION: PROTOTYPE FAST BREEDER REACTOR

05 Aug 2026 · FBRs are nuclear reactors that produce more fissile fuel than they consume, typically using MOX fuel and fast neutrons to convert fertile materials into fissile ones, vital for India's second nuclear stage.

Read article

Related topics

Practice writing on this topic

UPSC has asked 8 linked questions on Fast Breeder Reactors (FBRs) in Mains. Write an answer to one — and get it evaluated.

UPSC Prelims PYQs on Fast Breeder Reactors (FBRs)

Practice official previous year questions asked by UPSC related to this concept.

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