Kudankulam Nuclear Power Plant

The Kudankulam Nuclear Power Plant (KKNPP) traces its legal origin to an inter-governmental agreement signed on 20 November 1988 between Prime Minister Rajiv Gandhi and Soviet leader Mikhail Gorbachev for Soviet assistance in constructing a nuclear power station at Kudankulam in the Tirunelveli district of Tamil Nadu. The collapse of the Soviet Union froze the project, which was revived through a supplementary agreement in June 1998 between India and the Russian Federation. The plant is owned and operated by the Nuclear Power Corporation of India Limited (NPCIL), a public-sector undertaking under the Department of Atomic Energy, while the reactor technology and fuel supply are provided by Russia's Atomstroyexport (now part of Rosatom). Because the project predated India's 2008 waiver from the Nuclear Suppliers Group and was grandfathered as a pre-existing arrangement, it remains a cornerstone of Indo-Russian civil-nuclear cooperation.

The plant deploys Russian VVER-1000 (water-water energetic reactor) pressurised light-water reactors, each rated at 1,000 megawatts of electrical capacity—then the largest single units in the Indian fleet, which had historically relied on indigenous pressurised heavy-water reactors (PHWRs). Unit 1 attained first criticality in July 2013, was connected to the southern grid in October 2013, and was dedicated to the nation in August 2016; Unit 2 achieved criticality in July 2016 and commercial operation in 2017. Enriched uranium fuel for the reactors is supplied by Russia under the terms of the inter-governmental agreement, a significant distinction from India's natural-uranium PHWR programme. The reactors incorporate post-Fukushima passive safety systems, including a passive heat-removal system and a core-catcher to contain molten fuel in a severe-accident scenario.

KKNPP is being built in phases. Units 1 and 2 constitute the first phase; Units 3 and 4 were sanctioned under a general framework agreement, with their foundation-laying and pouring of first concrete marking subsequent milestones, and Units 5 and 6 followed under further agreements concluded in 2017. When all six VVER-1000 units are commissioned, the station's installed capacity will reach 6,000 MW, making it the largest nuclear power generating complex in India. Fuel fabrication, spent-fuel management, and the localisation of equipment manufacturing under the "Make in India" framework have featured in negotiations for the later units, reflecting an Indian effort to expand domestic content beyond the turnkey model of the first phase.

The contemporary diplomacy around Kudankulam runs through New Delhi and Moscow, with the Department of Atomic Energy, the Ministry of External Affairs, and Rosatom as principal interlocutors. Construction milestones for the later units have repeatedly featured in India-Russia annual summit communiqués, and the project has been cited as evidence of the durability of the bilateral "special and privileged strategic partnership" despite Western sanctions on Russia following the 2022 invasion of Ukraine. The plant has periodically drawn scrutiny over payment channels and component supply chains amid those sanctions, and over the continuity of Russian fuel and engineering support.

Kudankulam is distinct from India's indigenous nuclear infrastructure in several respects that a desk officer should keep straight. Unlike the PHWRs at Tarapur, Rawatbhata, Kakrapar, and Kaiga, which use natural uranium and heavy water and were developed under the Bhabha three-stage programme, KKNPP uses imported enriched uranium and is a light-water reactor. It should also be distinguished from the prototype fast breeder reactor at Kalpakkam, which represents the second stage of India's domestic fuel cycle, and from the Jaitapur project in Maharashtra, which involves French EPR technology from EDF. KKNPP units are placed under International Atomic Energy Agency safeguards as civilian facilities under India's separation plan following the 2008 Indo-US civil nuclear deal.

The plant has been the subject of sustained controversy. The People's Movement Against Nuclear Energy (PMANE), led by S. P. Udayakumar, mounted prolonged protests from 2011, intensified after the March 2011 Fukushima Daiichi accident, raising concerns about seismic and tsunami risk along the coast, radioactive waste, and the displacement of fishing communities. The Supreme Court of India, in G. Sundarrajan v. Union of India (2013), permitted commissioning to proceed, holding that the project served the larger public interest while directing compliance with safety conditions monitored by the Atomic Energy Regulatory Board. Operational reliability has also been questioned, with several unplanned outages reported in the units' early years, and questions raised about the liability regime under the Civil Liability for Nuclear Damage Act, 2010, whose supplier-liability provisions complicated negotiations for later units and other imported reactors.

For the working practitioner, Kudankulam is a compact case study in the intersection of energy security, non-proliferation diplomacy, and great-power partnership. It illustrates how a Cold War-era agreement survived geopolitical rupture to become India's flagship imported-reactor project, how IAEA safeguards and the post-2008 separation plan operate in practice, and how nuclear liability law shapes commercial terms. For UPSC General Studies Paper 3, the plant anchors questions on energy infrastructure, the three-stage nuclear programme, and the science-and-technology dimension of foreign policy; for analysts tracking Indo-Russian relations, its continued construction under sanctions is a live indicator of the resilience and limits of that partnership.