Daily PIB Highlights (6th & 7th April 2026)

Topic 1: Criticality of Prototype Fast Breeder Reactor (PFBR) at Kalpakkam

GS Paper 3: Science and Technology- developments and their applications and effects in everyday life; indigenization of technology and developing new technology; Achievements of Indians in science & technology.

Context: Prime Minister Shri Narendra Modi congratulated the nation as India’s indigenously developed Prototype Fast Breeder Reactor (PFBR) at Kalpakkam attained criticality on April 6, 2026. This marks the formal entry into the Second Stage of India’s Three-Stage Nuclear Power Programme.

What is Criticality?

In nuclear physics, “criticality” is the state where a nuclear fission chain reaction becomes self-sustaining. This means each fission event releases enough neutrons to cause exactly one subsequent fission event, maintaining a constant power level.

Understanding the PFBR: “The Breeder” Concept

The PFBR is a unique reactor designed and built by BHAVINI (Bharatiya Nabhikiya Vidyut Nigam Limited).

• • The Breeder Principle: It is called a “Breeder” because it produces more fissile fuel than it consumes.
  • How it works: It uses a mixture of Uranium-Plutonium Mixed Oxide (MOX) fuel. As the Plutonium undergoes fission to produce energy, the surrounding “blanket” of Uranium-238 absorbs neutrons and transmutes into more Plutonium-239.
  • Coolant: Unlike traditional reactors that use water, the PFBR uses Liquid Sodium as a coolant. Sodium is highly efficient at transferring heat at high temperatures without slowing down neutrons, which is essential for the “fast” fission process.

Significance in the Three-Stage Nuclear Programme

India’s nuclear strategy, envisioned by Dr. Homi J. Bhabha, is designed to eventually use India’s vast Thorium reserves.

1. Stage I (PHWRs): Pressurized Heavy Water Reactors using natural Uranium. They produce electricity and Plutonium-239 as a byproduct.

2. Stage II (FBRs) – Current Milestone: Fast Breeder Reactors use the Plutonium from Stage I to generate power and “breed” more Plutonium. Crucially, they can also use a Thorium-232 blanket to transmute it into Uranium-233.

3. Stage III (Thorium Reactors): The final stage will use Uranium-233 (bred in Stage II) and Thorium to provide sustainable, long-term energy for centuries.

Key Features of Kalpakkam PFBR

• • Capacity: 500 MWe.
  • Location: Kalpakkam, Tamil Nadu.
  • Indigenization: Almost entirely designed and built by Indian scientists and engineers, representing a peak of Atmanirbharta in high-tech engineering.
  • Safety: Features advanced passive safety systems to handle the unique properties of liquid sodium.

UPSC Prelims Fodder: Fact-Check

Feature	Details
PFBR	Prototype Fast Breeder Reactor (500 MWe).
BHAVINI	Nodal agency for FBRs (under Dept. of Atomic Energy).
Fuel	MOX (Mixed Oxide of Uranium and Plutonium).
Coolant	Liquid Sodium (Crucial: Not water).
Thorium	India has the world’s largest reserves; PFBR is the bridge to using them.

Conclusion:

The criticality of the PFBR is a “defining step” for India. It transitions the country from being a consumer of limited Uranium to a self-sufficient producer of nuclear fuel. This milestone not only ensures long-term energy security but also places India in an elite group of nations (like Russia) that have mastered fast reactor technology, paving the way for the Third Stage and the ultimate utilization of Thorium.

 

Topic 2: GeM Achievement – ₹18.4 Lakh Crore GMV and Digital Transformation

GS Paper 2: Important aspects of governance, transparency and accountability, institutional and other measures; E-governance- applications, models, successes, limitations, and potential.

GS Paper 3: Indian Economy and issues relating to planning, mobilization of resources, growth, development and employment; Effects of liberalization on the economy, changes in industrial policy and their effects on industrial growth.

Context: The Government e-Marketplace (GeM) has reached a historic cumulative Gross Merchandise Value (GMV) of ₹18.4 lakh crore, with the financial year 2025–26 alone contributing over ₹5 lakh crore.

What is GeM?

Launched in 2016, GeM is a one-stop National Public Procurement Portal to facilitate online procurement of common use Goods & Services required by various Government Departments / Organizations / CPSEs.

• • Nodal Ministry: Ministry of Commerce & Industry.
  • CEO: Shri Mihir Kumar.

Inclusive Growth and Social Equity

GeM has successfully democratized public procurement, providing a level playing field for smaller and marginalized entrepreneurs:

Category	Performance in FY 2025–26	Growth
MSEs	68% of total orders; 47.1% of total GMV (₹2.36 lakh crore)	>20%
Women-led MSEs	2.1 lakh registered; Received orders worth ₹28,000 crore	~28%
SC/ST MSEs	Received orders worth ₹6,000 crore	~28%
Startups	Secured orders worth over ₹19,000 crore	>36%

Technology-Driven Transparency (AI & ML)

GeM is evolving from a mere transaction portal to a smart, AI-powered analytical platform to ensure the integrity of public spending:

• • Automated Validation: Uses ML-based catalogue validation and “pre-sanity checks” to prevent errors in product listings.
  • Anomaly Detection: Advanced analytics identify patterns of collusive bidding, abnormal pricing, and technical rejection anomalies.
  • Bid Health Scores: A system-driven tool that evaluates the “health” of a bid to help buyers make informed decisions and detect potential buyer-seller collusion.
  • Real-time Monitoring: Tracking transactions to prevent leaks and ensure accountability.

Expanding Footprint: Role of States

While initially dominated by Central Ministries and CPSEs, the platform is now seeing massive adoption by State Governments:

• • State Growth: Procurement by States recorded a 38.3% growth in FY 2025–26.
  • Impact: This indicates deeper penetration of transparent procurement practices into regional and local administration levels.

UPSC Prelims Fodder: Fact-Check

Feature	Details
GMV	Gross Merchandise Value (Total value of goods/services sold).
Mandatory Use	Rule 149 of GFR (General Financial Rules) makes it mandatory for Govt. buyers to use GeM for items available on the portal.
MSE Share	Nearly half (47.1%) of the total GMV on GeM comes from MSEs.
BidHealth Score	Technology tool to detect collusion and price manipulation.
Womaniya	An initiative on GeM to promote products from women entrepreneurs and SHGs.

Conclusion:

GeM is a prime example of Digital Public Infrastructure (DPI) that combines social inclusion with technological rigor by empowering 11 lakh MSEs and using AI to fight corruption.

 

Topic 3: Decoding India’s Farming Past using Grass Pollen Grains

GS Paper 1: Indian culture – Salient aspects of Art Forms, Literature and Architecture from ancient to modern times; Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features.

GS Paper 3: Major crops-cropping patterns in various parts of the country; Science and Technology- developments and their applications and effects in everyday life.

Context: Scientists from the Birbal Sahni Institute of Palaeosciences (BSIP), Lucknow, have developed a first-of-its-kind biometric tool to distinguish between cultivated cereal pollen and wild grass pollen, specifically for the Central Ganga Plain (CGP).

The Scientific Challenge

Most major food staples like wheat, rice, barley, and millets belong to the Poaceae (grass) family. Traditionally, it has been extremely difficult to tell their fossilized pollen apart from wild grasses under a microscope because they look nearly identical.

• • Significance of Pollen: Pollen is preserved in soil sediments for thousands of years. Identifying it accurately allows scientists to reconstruct:
    • Ancient agricultural practices.
    • Past human settlements.
    • History of deforestation and land-use changes during the Holocene (the last 11,700 years).

The Discovery: “Paired Biometric Threshold”

Using advanced imaging techniques like Confocal Laser Scanning Microscopy (CLSM) and Field Emission Scanning Electron Microscopy (FESEM), researchers established a specific numerical boundary for the Central Ganga Plain:

Feature	Cultivated Cereal Pollen	Wild Grass Pollen
Grain Diameter	Generally > 46 µm	Generally < 46 µm
Annulus Size	Generally > 9 µm	Generally < 9 µm

(Note: Pearl millet is an exception and remains smaller).

Strategic Importance for India

• • Indigenous Database: Previously, Indian scientists often relied on European pollen databases, which were not always accurate for tropical Indian crops. This study provides the first region-specific analogue based on local evidence.
  • Reconstructing the “Food Basket”: The Central Ganga Plain is India’s primary agricultural hub. This tool helps environmental historians trace exactly when and how humans transformed these fertile plains into a major agricultural center.
  • Palaeoecology: It aids in understanding how ancient societies influenced local ecosystems and how they adapted to past climate changes.

Key Institutions and Lead Scientists

• • Nodal Agency: Birbal Sahni Institute of Palaeosciences (BSIP), Lucknow (An autonomous body under the Department of Science and Technology).
  • Lead Scientist: Dr. Swati Tripathi.
  • Collaborators: Botanical Survey of India (BSI), Indian Institute of Geomagnetism (IIG), and Lucknow University.

UPSC Prelims Fodder: Fact-Check

Feature	Details
BSIP	Located in Lucknow; specializes in Palaeobotany and Palaeontology.
Poaceae	The Grass family, which includes Wheat, Rice, and Millets.
Annulus	The ring surrounding the pore on a pollen grain—a key biometric marker.
Holocene	Current geological epoch (started ~11,700 years ago).
Central Ganga Plain	Geographic focus area of the study (encompassing parts of UP and Bihar).

Conclusion:

This study is a breakthrough for Indian archaeobotany. By providing a “biometric fingerprint” for ancient crops, BSIP has enabled a much more precise mapping of India’s agricultural origins.

 

Topic 4: Transit Oriented Development (TOD) Policy 2026 for Delhi

GS Paper 2: Government policies and interventions for development in various sectors and issues arising out of their design and implementation.

GS Paper 3: Infrastructure: Energy, Ports, Roads, Airports, Railways etc.; Changes in industrial policy and their effects on industrial growth.

Context: Union Minister for Housing and Urban Affairs, Shri Manohar Lal, has introduced the Regulations for Transit Oriented Development (TOD) and Charges, 2026. This policy significantly updates the Master Plan for Delhi-2021 (MPD-2021) to promote high-density, sustainable, and transit-linked urban growth.

What is Transit Oriented Development (TOD)?

TOD is a compact, mixed-use development model centered around high-quality public transport. It encourages people to live and work near transit stations, reducing dependence on private vehicles and optimizing land use.

• • Zone of Influence: High-density development is promoted within a 500-metre radius of Metro, RRTS (Regional Rapid Transit System), and Railway stations.
  • Expansion of Coverage: The policy opens up an area of 207 sq. km (an increase from earlier versions).
  • Inclusion: It now includes 80 sq. km of areas previously excluded, such as Land Pooling areas, Low-Density Residential Areas, and regularized Unauthorised Colonies.

Key Provisions: Affordable Housing Focus

The 2026 policy is strategically designed to solve Delhi’s housing shortage by leveraging transit corridors.

• • High Floor Area Ratio (FAR): A maximum FAR of 500 is permitted on plots of 2,000 sq. m and above located on an 18m road.
  • Mandatory Residential Allocation: Out of the total permissible FAR, 65% must be used for Residential purposes, with dwelling units limited to a built-up area of $\le 99$ sq. m. This is intended specifically to generate affordable housing stock.
  • Mixed Land Use: The remaining 35% can be split between commercial/amenities (10%) and flexible options like larger housing, offices, or studio apartments (25%).
  • Enhanced Connectivity: To encourage “Ease of Living,” the policy allows for underground or elevated pedestrian walkways connecting private plots directly to transit stations.

Ease of Doing Business (EoDB) Reforms

The 2026 Regulations remove several bureaucratic “inefficiencies” that hindered earlier TOD efforts:

Feature	Old Policy	New Regulations (2026)
Approach	Node-based (minimum 8 Ha land)	Corridor-based (Entire metro length)
Plot Size	Minimum 1 Ha required	Minimum 2,000 sq. m
Approval	Multi-agency (MCD, DJB, DDA)	Single Window System
Charges	Multiple (Conversion, FAR, Sanction)	Single Unified TOD Charge
Mandate	Required Influence Zone Plans (IZPs)	Eliminated IZP prerequisite

Administrative Simplification

• • TOD Committee: A specialized committee under the VC, DDA, will ensure time-bound approvals. Citizens only need to apply at one point without approaching separate agencies like the Delhi Jal Board (DJB) or Municipal Corporation of Delhi (MCD).
  • Unified Charge: The single TOD charge now encompasses DJB water/sewerage charges, MCD sanction charges, land use change levies, and DDA conversion charges.

UPSC Prelims Fodder: Fact-Check

Feature	Details
Nodal Ministry	Ministry of Housing & Urban Affairs (MoHUA).
TOD Zone	500 metres on either side of transit corridors.
Maximum FAR	500 (Highest density allowed in Delhi).
Applicability	Applies to both operational and proposed metro corridors.
Exclusions Removed	Unauthorised colonies and land pooling areas are now included.

Conclusion:

The TOD Policy 2026 represents a shift from “sprawl-based” development to “compact-hub” development by centering 45 lakh lives (via regularized colonies) and new affordable housing around Delhi’s world-class metro network.

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