[pib] Prototype Fast Breeder Reactor (PFBR)

Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

Why in the News?

The Bharatiya Nabhikiya Vidyut Nigam Limited (BHAVINI) 500 MWe Prototype Fast Breeder Reactor (PFBR) at Kalpakkam, Tamil Nadu, is scheduled to achieve criticality in March 2026 and reach full power generation by December 2026.

What is a Fast Breeder Reactor (FBR)?

A Fast Breeder Reactor (FBR) is a type of nuclear reactor that generates more fuel than it consumes, essentially “breeding” more nuclear material to power itself and future reactors.
It does this by using high-energy, or “fast,” neutrons to convert abundant, non-fissile uranium (U-238) into fissile plutonium (Pu-239) for fuel.

About India’s Prototype Fast Breeder Reactor (PFBR):

Design began: 1980s as prototype for future 600 MWe FBRs.
Timeline: Construction began in 2004, faced delays; cost escalated from ₹3,500 crore to ₹7,700 crore.
Capacity: 500 MWe, sodium-cooled fast breeder reactor.
Predecessors: It builds on India’s earlier reactors: KAMINI and Fast Breeder Test Reactor (FBTR).
Technology: Completely indigenous, designed by Indira Gandhi Centre for Atomic Research (IGCAR).
Fuel: Uranium-Plutonium mixed oxide (MOX); later stages to use Thorium-232 to breed fissile U-233.
Burnup: 100 GWd/t, reactor life ~40 years.
Coolant: 1,750 tonnes of liquid sodium; pool-type design with high thermal inertia.
Construction agencies: Uranium-Plutonium mixed oxide (MOX) fuel fabricated by BARC Tarapur; reactor equipment by BHEL.
Site: Kokkilamedu, near Kalpakkam (next to Madras Atomic Power Station).

Significance in India’s Nuclear Programme:

PFBR is the second stage of India’s three-stage programme:
- Stage 1: Pressurised Heavy Water Reactors (PHWRs) using natural uranium.
- Stage 2: Fast Breeder Reactors producing plutonium and U-233 from thorium.
- Stage 3: Thorium-based U-233 fuel cycle.
Enables closed fuel cycle: recovery and recycling of fissile and fertile material from spent nuclear fuel (SNF).
Enhances energy security by optimally utilising limited uranium and vast thorium reserves.
Reduces radioactive waste through recycling.

[UPSC 2024] With reference to radioisotope thermoelectric generators (RTGs), consider the following statements:

1. RTGs are miniature fission reactors.

2. RTGs are used for powering the onboard systems of spacecrafts.

3. RTGs can use Plutonium-238, which is a by-product of weapons development.

Which of the statements given above are correct?

Options: (a) 1 and 2 only (b) 2 and 3 only* (c) 1 and 3 only (d) 1, 2 and 3

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Forest Conservation Efforts – NFP, Western Ghats, etc.

Haryana defines ‘Forest’: Controversy and Implications

Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

Why in the News?

Haryana has notified the dictionary meaning of “forest” as per Supreme Court directions.

Haryana defines ‘Forest’: Controversy and Implications

Haryana’s definition of Forest:

Definition: A patch of land is deemed a forest if:
- Minimum area: 5 hectares (isolated) or 2 hectares (contiguous with notified forest).
- Minimum canopy density: 0.4 (40%) or more.
Exclusions: Linear/compact/agro-forestry plantations and orchards outside government-notified forests.
Aim: Create a uniform standard for identifying forests under the Forest (Conservation) Act, 1980 (FCA).

Issues with Haryana’s Definition:

High thresholds:
- 40% canopy cover excludes scrub forests and dry deciduous vegetation like the Aravallis.
- 2–5 hectare size requirement too high for an arid state with fragmented green cover.
Exclusion of Aravallis: Sensitive ridge areas risk exposure to illegal mining, encroachment, and real estate development.
Contradiction with Godavarman judgment (1996): SC had ruled that “forest” must be understood in its dictionary meaning, regardless of size, ownership, or canopy density.
Dilution of protection under FCA 1980: Narrows the scope of land eligible for forest safeguards.

Godavarman Case & FCA Background:

Forest (Conservation) Act, 1980: Restricted dereservation/diversion of forest land without Centre’s approval.
T N Godavarman v Union of India (1996): Court ruled “forest” must be understood in its dictionary meaning, covering all forested lands regardless of ownership or official status.
2023 FCA Amendment: Limited scope to notified forests and recorded forest lands.
- Amendment challenged by retired IFS officers and NGOs for diluting FCA protections.
SC in February 2024 directed States/UTs to continue using Godavarman definition while case is ongoing.

[UPSC 2005] The minimum land area recommended for forest cover to maintain proper ecological balance in India is

Options: (a) 0.25 (b) 0.33* (c) 0.43 (d) 0.53

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Policy Wise: India’s Power Sector

Kalai-II Hydroelectric Project

Prelims Only | Economics | Mains Paper 3: Infrastructure: Energy, Ports, Roads, Airports, Railways Etc.
Why in the News?

The Arunachal Pradesh State Pollution Control Board (APSPCB) conducted a public hearing for the proposed 1,200 MW Kalai-II hydroelectric project in Anjaw district.

About Kalai-II Hydroelectric Project:
- Location: Anjaw District, Arunachal Pradesh, on the Lohit River (tributary of the Brahmaputra).
- Capacity: 1,200 MW (six turbines of 190 MW each + one unit of 60 MW).
- Project Type: Run-of-river with pondage.
- Key Features: Concrete gravity dam, diversion tunnels, underground powerhouse, surge chamber, and tailrace tunnel.
- Power Generation: Estimated 4.85 TWh annually; free power worth ₹318 crore/year for the state.
- Equity: Arunachal Pradesh holds 26% stake.
Strategic Importance:
- Energy Security: Expands India’s renewable energy portfolio and hydropower capacity in the North-East.
- Geopolitical Context: Strengthens India’s presence in the sensitive Brahmaputra basin bordering China.
- Economic Boost: Contributes to state revenues through free power and Local Area Development Fund (~₹2.2 crore/year).
- Part of Larger Push: One of 13 stalled hydropower projects in Arunachal Pradesh revived through MoAs with central PSUs, aligning with India’s clean energy targets.
[UPSC 2008] On which one of the following rivers is the Tehri Hydropower Complex located?

Options: (a) Alaknanda (b) Bhagirathi *(c) Dhauliganga (d) Mandakini
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Tiger Conservation Efforts – Project Tiger, etc.

NTCA limits definition of Tiger Corridors

Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

Why in the News?

The National Tiger Conservation Authority (NTCA) recently issued a clarification limiting tiger corridors primarily to 32 “least cost pathways” identified in 2014.

About National Tiger Conservation Authority (NTCA):

Statutory body: Under Ministry of Environment, Forest and Climate Change (MoEFCC).
Establishment: Created in 2006 under the Wildlife Protection Act, 1972.
Functions: Provides legal backing to Project Tiger, ensures Centre–State accountability via MoUs, and enables Parliamentary oversight.
Community Role: Addresses livelihood concerns of people around tiger reserves.
Composition: Chaired by MoEFCC Minister, Vice-Chairperson MoS, 3 Members of Parliament, MoEFCC Secretary, and others.

What are Tiger Corridors?

Definition: Landscape linkages between tiger habitats that allow safe passage, genetic flow, and survival.
Need: Prevent isolation of tiger populations and human–tiger conflicts.
Examples of Macro-Corridors:
- Shivalik–Gangetic Plains: Corbett–Dudhwa, Dudhwa–Kishanpur–Katerniaghat.
- Central India & Eastern Ghats: Ranthambhore–Kuno–Madhav, Kanha–Pench, Bandhavgarh–Achanakmar.
- Western Ghats: Sahyadri–Konkan–Radhanagari–Goa–Karnataka.
- Northeast & Brahmaputra: Kaziranga–Karbi Anglong, Manas–Buxa.
- Sundarbans Landscape.

NTCA’s Policy Reversal:

July 25 Affidavit: Said corridor identification must use multiple data sources – protected areas, 2014 NTCA pathways, Tiger Conservation Plans (TCPs), Wildlife Institute of India (WII) studies (2016, 2021), and All-India Tiger Estimation (AITE) data.
August 21 Clarification: Limited definition only to 2014 least-cost pathways (32 corridors) and TCP corridors.
Exclusions: WII studies and AITE data dropped, despite 2014 report itself warning that listed corridors were “minimal requirement.”

[UPSC 2020] Among the following Tiger Reserves, which one has the largest area under “Critical Tiger Habitat”?

Options: (a) Corbett (b) Ranthambore (c) Nagarjunsagar-Srisailam* (d) Sunderbans

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Foreign Policy Watch: India-Africa

African Union (AU) and the Mercator Map Debate

Prelims Only World Mapping | Geography | Mains Paper 1: Salient Features Of World’S Physical Geography

Why in the News?

The African Union (AU) has endorsed the Correct the Map campaign to replace the 16th-century Mercator projection with more accurate maps.

African Union (AU) and the Mercator Map Debate

About the African Union (AU):

Establishment: Formed in 2002, replacing the Organisation of African Unity (1963).
Membership: 55 African countries.
Headquarters: Addis Ababa, Ethiopia.
Vision: “An Integrated, Prosperous, and Peaceful Africa, driven by its own citizens.”
Agenda 2063: Blueprint for socio-economic growth and continental unity.
Main Organs: Assembly, Executive Council, AU Commission, Peace and Security Council.

What is a Mercator Map?

Creation: Designed in 1569 by Gerardus Mercator.
Projection: Cylindrical map with straight longitude and latitude lines intersecting at 90°.
Purpose: Enabled sailors to plot straight-line courses for compass navigation.
Adoption: Became the standard map in schools, atlases, and wall charts by the 19th century.

Issues with the Mercator Map:

Distortion: Enlarges high-latitude regions (Europe, Russia, North America) while shrinking Africa and South America.
Example: Greenland appears equal to Africa, though Africa is ~14 times larger.
Colonial Bias: Reinforced Western dominance narratives and downplayed Africa’s size and importance.
Impact: Supported marginalisation and exploitation during colonialism.
Alternatives: Gall-Peters (1970s) and Equal Earth (2018) projections show continents in correct proportion.
AU Stand: Advocates replacing Mercator maps to restore Africa’s rightful global image.

[UPSC 2024] The longest border between any two countries in the world is between:

Options: (a) Canada and the USA * (b) Chile and Argentina (c) China and India (d) Kazakhstan and Russian Federation

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OBOR Initiative

Xinjiang-Xizang Railway Line

Prelims Only | International Relations | Mains Paper 2: Effect Of Policies & Politics Of World On India’S Interests

Why in the News?

China has launched the Xinjiang–Xizang Railway Line, a strategic, economic, and engineering milestone, connecting Xinjiang with Tibet.

Xinjiang-Xizang Railway Line

About the Xinjiang–Xizang Railway Line:

Overview: A major high-altitude railway project connecting Hotan in Xinjiang to Shigatse and Lhasa in Tibet (Xizang).
Total length planned: ~2,000 km, part of China’s larger 5,000 km rail grid in Tibet by 2035.
Construction is phased:
- Shigatse–Pakhuktso section (by 2025)
- Pakhuktso–Hotan section (by 2035).
Terrain: Himalayas, Karakoram, Kunlun ranges, deserts, glaciers, and permafrost — average altitude above 4,500m.
Significance: Seen as one of China’s most advanced and difficult transport projects, comparable to the Qinghai–Tibet Railway (2006).

Strategic Implications of the Project:

Military Mobility: Proximity to Aksai Chin and Line of Actual Control (LAC) enhances Chinese troop deployment and logistics capabilities.
Regional Integration: Links Xinjiang (Uyghur region) and Tibet (Buddhist region) with mainland China, supporting Sinicisation and demographic shifts.
Economic Role: Opens remote high-altitude areas to trade, energy transport, and tourism, reducing isolation of minority regions.
Political Control: Strengthens Beijing’s hold over restive border provinces and suppresses separatist tendencies.
India Factor: Raises security concerns as India is also upgrading border infrastructure post-2020 Galwan clash.
Part of “Go West Strategy” (2000): Long-term plan to develop western provinces with infrastructure and integrate them into China’s national economy.

[UPSC 2023] With reference to India’s projects on connectivity, consider the following statements :

1. East-West Corridor under Golden Quadrilateral Project connects Dibrugarh and Surat.

2. Trilateral Highway connects Moreh in Manipur and Chiang Mai in Thailand via Myanmar.

3. Bangladesh-China -India -Myanmar Economic Corridor connects Varanasi in Uttar Pradesh with Kunming in China. How many of the above statements are correct?

Options: (a) Only one (b) Only two (c) All three (d) None*

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Indian Missile Program Updates

Agni-5 Intermediate-Range Ballistic Missile

Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

Why in the News?

India has successfully test-fired the Agni-5 Intermediate-Range Ballistic Missile (IRBM) from the Integrated Test Range, Chandipur (Odisha).

Agni-5 Intermediate-Range Ballistic Missile

What are Ballistic Missiles?

Powered by: Solid propellant rocket motors; thrust generated by exhaust gases forces missile upward.
Three phases:
- Boost Phase – missile consumes propellant; trajectory fixed.
- Midcourse Phase – missile coasts in space on momentum.
- Terminal Phase – warheads re-enter atmosphere and strike target.

About Agni-5:

Type: Intercontinental Ballistic Missile (ICBM) developed by DRDO.
Range: 5,000–5,500 km (upgrade under development up to 7,500 km).
Propulsion: Three-stage, solid-fuel rocket motors.
Payload: ~1.5 tonnes, nuclear-capable.
Multiple Independently Targetable Re-entry Vehicle (MIRV) Technology: Can carry multiple nuclear warheads that target different locations.
Features: Fire-and-forget system, advanced navigation, guidance and propulsion technologies.
First Test: 2012 from Wheeler Island (Odisha).
Strategic Role: Strengthens India’s nuclear deterrence posture, especially vis-à-vis China.

Back2Basics: Agni Series and its Development

Origins: Began in 1983 under the Integrated Guided Missile Development Programme (IGMDP) led by A.P.J. Abdul Kalam.
Evolution: Started as technology demonstrators for re-entry vehicles; later developed into full-fledged strategic missiles.
Variants:
- Agni-I: 700–1,200 km range, inducted 2007.
- Agni-II: 2,000–3,000 km range, inducted 2010.
- Agni-III: 3,500 km range, highly accurate, tested 2007.
- Agni-IV: 4,000 km range, advanced avionics, tested 2011.
- Agni-V: 5,000+ km range, ICBM, MIRV capable.
- Agni Prime (Agni-P): 1,000–2,000 km, lighter, tested 2021.
- Agni-VI: Under development, 6,000–10,000 km, MIRV + submarine launch capable.
Significance: Backbone of India’s nuclear triad, enhancing deterrence against regional and global adversaries.

[UPSC 2023] Consider the following statements:

1. Ballistic missiles are jet-propelled at subsonic speeds throughout their fights, while cruise missiles are rocket-powered only in the initial phase of flight.

2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

Which of the statements given above is/are correct?

Options: (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2*

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Innovations in Biotechnology and Medical Sciences

Bistability in Pseudomonas aeruginosa and the glpD Gene

Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

Why in the News?

German researchers found that P. aeruginosa bacteria can switch a key gene (glpD) on or off, even though the bacteria are genetically identical — a survival trick called epigenetic bistability.

Bistability in Pseudomonas aeruginosa and the glpD Gene

About Pseudomonas aeruginosa:

Nature: Rod-shaped bacterium found in soil, water, and hospital environments.
Pathogen Type: Opportunistic; infects mainly those with weakened immunity.
Resistance: Forms biofilms (protective layers), making it highly resistant to antibiotics.
Genetic Flexibility: Large genome (~6,000 genes) allows adaptation to diverse environments.

Impact on Humans:

Hospital Infections: Leading cause of hospital-acquired infections.
Vulnerable Groups: Burn patients, catheter users, cystic fibrosis patients.
Diseases Caused: Keratitis (eye infection), urinary tract infections, pneumonia, bloodstream infections.
Mortality: Strong antibiotic resistance makes treatment difficult, leading to high hospital deaths.

Recent Research Findings:

Discovery: German researchers identified bistable expression of the glpD gene (active in some cells, inactive in others).
Survival Advantage: This variability helps bacteria survive hostile conditions and trigger infections even from small populations.
Experiments:
- Cells with glpD active were more lethal in moth larvae and mouse immune models.
- Cells without glpD showed reduced infection ability.
Significance: On–off switching of glpD is a survival and infection strategy; targeting this mechanism may lead to new treatments for resistant infections.

[UPSC 2010] Which bacterial strain, developed from natural isolated by genetic manipulations, can be used for treating oil spills?

Options: (a) Agrodbacterium (b) Clostridium (c) Nitrosomonas (d) Pseudomonas*

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The Crisis In The Middle East

In news: International Criminal Court (ICC)

IOCR Prelims Only | International Relations | Mains Paper 2: Important International Institutions

Why in the News?

The Trump administration sanctioned judges and prosecutors of the International Criminal Court (ICC) over arrest cases involving Israeli leaders and past probes into U.S. officials.

About the International Criminal Court (ICC):

Established: 2002 under the Rome Statute (1998); headquartered at The Hague, Netherlands.
Nature: First permanent international court to try individuals for grave crimes.
Jurisdiction over 4 core crimes:

1. Genocide
2. Crimes against humanity
3. War crimes
4. Crime of aggression

Members: 124 States Parties
- NON-members: India, China, USA, Russia, Israel, Ukraine
Structure:
- Office of the Prosecutor – investigates and prosecutes cases.
- 18 Judges – elected for 9 years.
- Assembly of States Parties – governs ICC administration.
- Trust Fund for Victims, Detention Centre
Languages: English, French, Arabic, Chinese, Russian, Spanish
Funding: Annual budget (2025) ~ €195 million (mostly from member states)

Jurisdiction and Reach of an ICC Warrant:

Applicability:
- Crimes by nationals of member states
- Crimes committed on member state territory
- UNSC referrals can extend jurisdiction to non-member states (e.g., Libya, Darfur)
Obligations on States:
- Member states must execute arrest warrants and cooperate fully.
- Non-compliance can be reported to Assembly of States Parties or UN Security Council (for UNSC referrals)
Challenges:
- ICC lacks an independent enforcement mechanism
- Non-members (e.g., US, Russia) are not bound to cooperate
- Political and diplomatic constraints hinder the execution of warrants
Special Mechanisms: ICC established an Arrest Working Group (2016) to enhance warrant enforcement through better intelligence-sharing.

[UPSC 2022] Which one of the following statements best reflects the issue with Senkaku Islands, sometimes mentioned in the news ?

Options:

(a) It is generally believed that they are artificial islands made by a country around South China Sea.

(b) China and Japan engage in maritime disputes over these islands in East China Sea. *

(d) Though International Court of Justice declared them as no man’s land, some South-East Asian countries claim them.

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Minority Issues – SC, ST, Dalits, OBC, Reservations, etc.

‘Creamy Layer’ condition in OBC Quota

Prelims Only | Polity | Mains Paper 2: Indian Constitution – historical underpinnings, evolution, features, amendments, significant provisions and basic structure

Why in the News?

The government is considering measures to ensure uniform application of the ‘creamy layer’ condition in OBC reservations across central and state government jobs, public sector enterprises, universities, and autonomous bodies.

About the Concept of Creamy Layer:

Origin: Emerged from Indra Sawhney vs Union of India (1992); excluded affluent Other Backward Class (OBC) groups from reservations.
1993 DoPT Rules: Defined creamy layer – children of Group A/Class I officers, early-promoted officials, Group B parents, senior armed forces, high constitutional functionaries, professionals, traders, and large landowners.
Income Criteria:
- Ceiling: ₹1 lakh in 1993, revised to ₹8 lakh in 2017.
- Exclusions: Salary and agricultural income not counted.

2004 Clarification & Implementation Issues:

Clarification: DoPT directed separate assessment of salary and other income (except agriculture).
Rule: If either exceeded limit (₹2.5 lakh then) for 3 consecutive years → creamy layer.
Problem: Poor enforcement (2004–14) due to political sensitivities; stricter checks after 2014.
Impact: Between CSE 2015–23, over 100 OBC caste certificates rejected under new interpretations.

Equivalence Efforts:

Consultations: Involved Social Justice, Education, Law, Labour Ministries, DoPT, NITI Aayog, NCBC.
Goal: Standardise creamy layer rules across universities, Public Sector Undertakings (PSUs), and autonomous bodies.
Proposal: Retrospective relief suggested by Home Minister Amit Shah and NCBC.

Key Proposals Under Consideration:

University Teachers: Salaries start at Group A-equivalent → children to be creamy layer.
Autonomous Bodies: Posts aligned with central pay scales.
Non-Teaching Staff: Categorisation based on equivalence with government jobs.
PSU Executives: Already included since 2017; those ≤₹8 lakh excluded.
Aided Institutions: Staff categorised based on parity with govt. employees.

Likely Beneficiaries:

Lower Govt. Staff: Children of employees earning just above ₹8 lakh gain most.
Correction of Anomalies: Ensures parity between teachers and aided staff.
State PSU Issues: Fixes cases like fuel pump attendants in PSUs being declared creamy layer.
Private Sector: No change; creamy layer based only on income/wealth criteria.

[UPSC 2023] Consider the following organizations/bodies in India:

1. The National Commission for Backward Classes

2. The National Human Rights Commission

3. The National Law Commission

4. The National Consumer Disputes Redressal Commission

How many of the above are constitutional bodies?

Options: (a) Only one *(b) Only two (c) Only three (d) All four

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Type: Prelims Only

Why in the News?

What is a Fast Breeder Reactor (FBR)?

About India’s Prototype Fast Breeder Reactor (PFBR):

Significance in India’s Nuclear Programme:

Why in the News?

Haryana’s definition of Forest:

Issues with Haryana’s Definition:

Godavarman Case & FCA Background:

Why in the News?

About Kalai-II Hydroelectric Project:

Strategic Importance:

Why in the News?

About National Tiger Conservation Authority (NTCA):

What are Tiger Corridors?

NTCA’s Policy Reversal:

Why in the News?

About the African Union (AU):

What is a Mercator Map?

Issues with the Mercator Map:

Why in the News?

About the Xinjiang–Xizang Railway Line:

Strategic Implications of the Project:

Why in the News?

What are Ballistic Missiles?

About Agni-5:

Back2Basics: Agni Series and its Development

Why in the News?

About Pseudomonas aeruginosa:

Impact on Humans:

Recent Research Findings:

Why in the News?

About the International Criminal Court (ICC):

Jurisdiction and Reach of an ICC Warrant:

Why in the News?

About the Concept of Creamy Layer:

2004 Clarification & Implementation Issues:

Equivalence Efforts:

Key Proposals Under Consideration:

Likely Beneficiaries: