9 December 2023

• China launches fourth-generation nuclear reactor: The Shidao Bay plant using small modular reactors began operations, making China the first to commission a commercial HTR-PM reactor.
• Chennai flood mitigation: PM Modi approved Rs 500 crore in central assistance for an Integrated Urban Flood Management project for the Chennai basin under NDMF.
• PACS diversification: The Ministry of Cooperation announced that model bye-laws would allow Primary Agricultural Credit Societies to expand into dairy, fisheries, and warehousing.
• Nagorno-Karabakh: Armenia and Azerbaijan agreed to prisoner exchange and resumed peace treaty talks.

GS area: Science and Technology, Energy

China commissioned the Shidao Bay nuclear plant in Shandong province, the world's first commercial high-temperature gas-cooled reactor (HTR-PM) using small modular reactor (SMR) technology:

• Small Modular Reactors: Reactors with electrical capacity up to 300 MW. They use factory-built components installed on-site.
• Refuelling advantage: SMRs typically require refuelling every 3 to 7 years versus 1 to 2 years for conventional pressurised water reactors.
• Safety feature: The Shidao Bay design uses gas (helium) cooling and graphite moderation, making meltdown physically impossible according to its designers. The reactor self-shuts when it overheats without operator intervention.
• India's SMR interest: India's Department of Atomic Energy has expressed interest in SMRs for decentralised power generation and for hard-to-reach areas where large plants are not viable.
• ITER context: ITER is the international tokamak fusion reactor under construction in Cadarache, France. SMRs are fission reactors. They should not be confused.

Static linkage: Nuclear energy, science and technology, energy security.

GS area: Disaster Management, Governance

The PM approved the Integrated Urban Flood Management for Chennai Basin project with Rs 500 crore central assistance from the National Disaster Mitigation Fund (NDMF):

• Trigger: The flooding from Cyclone Michaung that submerged large parts of Chennai on 4-5 December demonstrated the city's vulnerability to extreme rain events.
• National Disaster Mitigation Fund: Created under the Disaster Management Act of 2005 to fund mitigation works that reduce disaster risk. Distinct from the National Disaster Response Fund (NDRF) which finances relief and rescue.
• Chennai Basin: The Adyar, Cooum, and Buckingham Canal system drains much of the city into the Bay of Bengal. Encroachments on floodplains and drainage channels intensify flood impact.
• Climate context: Chennai's flooding episodes in 2015, 2021, and 2023 are attributed to intensifying rainfall events linked to climate change.

Static linkage: Disaster management, urban governance, climate adaptation.

GS area: International Relations, Geography

Armenia and Azerbaijan agreed to a prisoner exchange and announced the resumption of peace treaty negotiations over the disputed Nagorno-Karabakh region:

• Nagorno-Karabakh: A region that was predominantly Armenian-populated but lay within the borders of Soviet Azerbaijan. In 2023, Azerbaijan retook full military control in a rapid offensive, resulting in almost all ethnic Armenians leaving the region.
• Russian mediation: The 1994 ceasefire that ended the first Nagorno-Karabakh war was mediated by Russia. Russia also brokered the 2020 ceasefire after the second war.
• OSCE Minsk Group: The Organisation for Security and Co-operation in Europe's Minsk Group was the formal mediation framework co-chaired by Russia, France, and the United States. It effectively collapsed after Azerbaijan's 2023 offensive.

Static linkage: Post-Soviet geopolitics, international conflict resolution, geography of the South Caucasus.

GS area: Science and Technology

China's Shidao Bay commissioning renewed attention to Generation IV nuclear reactor designs. Key distinctions:

• Generation I: Early commercial reactors (1950s-1960s), now largely decommissioned.
• Generation II: Most of the global operating fleet, including India's PHWR Kakrapar units and PWRs.
• Generation III and III+: Advanced safety reactors with passive cooling, including the AP1000 and EPR.
• Generation IV: Concepts including HTGRs, sodium-cooled fast reactors, and molten salt reactors, designed for inherent safety, waste reduction, and efficiency. China's Shidao Bay is the first Generation IV commercial reactor worldwide.

Static linkage: Nuclear technology, energy policy.

GS area: Economy, Agriculture

Model bye-laws enabling Primary Agricultural Credit Societies (PACS) to offer over 25 types of non-credit services were unveiled:

• New services allowed: Dairy operations, fishery inputs, godown and warehouse management, processing of agricultural produce, and common service centre operations.
• Rationale: PACS at the village level already have established member relationships. Adding non-credit services reduces PACS' dependence on loan interest income and makes them viable for members even in low-borrowing seasons.
• Three-tier credit system: PACS form the base level. District Central Cooperative Banks (DCCBs) form the second tier. State Cooperative Banks (StCBs) form the apex.

Static linkage: Cooperative sector, agriculture credit, rural economy.

GS area: Environment, Economy

The UNEP Global Cooling Watch 2023 report recommended three pathways to dramatically cut cooling-related emissions:

• Passive cooling: Reflective roofs, cross-ventilation design, urban greening, and cool corridors reduce cooling demand at the building level.
• Efficiency standards: Mandatory minimum energy performance standards for air conditioners can cut electricity consumption per unit of cooling by 50 per cent or more.
• Refrigerant phase-down: Phasing out HFCs under the Kigali Amendment, combined with refrigerant leak detection and servicing standards.
• Combined impact: Full implementation of all three pathways combined with grid decarbonisation could reduce 2050 cooling emissions by up to 96 per cent.

Static linkage: Climate change, energy efficiency, environmental policy.

• DRESS syndrome alert: The Indian Pharmacopoeia Commission issued an alert about mefenamic acid (Meftal) causing Drug Rash with Eosinophilia and Systemic Symptoms. DRESS is a delayed-onset severe drug reaction involving the immune system that can take two to eight weeks to manifest.
• Ethanol blending update: India's ethanol blending in petrol reached about 12 per cent in 2022-23. The target is 20 per cent by 2025-26. Sugarcane juice was temporarily banned from ethanol feedstocks to stabilise sugar prices.