Kakrapar Atomic Power Station

Kakrapar Atomic Power Station
Name	Kakrapar Atomic Power Station
Country	India
Location	Mandvi, Surat district, Gujarat
Status	Operational
Operator	Nuclear Power Corporation of India Limited
Construction started	1970s
Commissioning	1993 (Unit 1), 1995 (Unit 2)
Reactors	Pressurized Heavy Water Reactor (PHWR), Pressurized Water Reactor (PWR)
Units operational	2 × 220 MW PHWR, 1 × 700 MW PWR
Electrical capacity	~1,140 MW

Kakrapar Atomic Power Station is a nuclear power facility located near Mandvi in the Surat district of Gujarat, India. It is operated by the Nuclear Power Corporation of India Limited and comprises a mix of indigenous Pressurized Heavy Water Reactor units and a later generation Pressurized Water Reactor unit. The station plays a role in India's civilian nuclear energy programme alongside other plants such as Tarapur Atomic Power Station, Rawatbhata, and Kaiga.

Overview

The site at Mandvi is situated on the banks of the Tapi River near the Arabian Sea and was selected during expansion phases of India's nuclear power development driven by policy frameworks from the Atomic Energy Commission of India and strategic plans linked to the Department of Atomic Energy (India). Construction activity involved domestic contractors and international collaborations, interacting with organizations such as Bhabha Atomic Research Centre, Raja Ramanna Centre for Advanced Technology, and state authorities in Gujarat. The plant contributes to regional grid stability managed by Power Grid Corporation of India and interfaces with transmission networks serving Mumbai, Ahmedabad, and other nodes.

Reactors and Technical Specifications

Early units, designated Unit 1 and Unit 2, are 220 MW PHWR designs based on indigenous technology developed at Bhabha Atomic Research Centre and patterned after earlier reactors at Narora Atomic Power Station and Rajasthan Atomic Power Station. These PHWRs utilize heavy water moderator and coolant, natural uranium fuel, and calandria systems designed and tested with support from institutions such as Tata Institute of Fundamental Research. Technical systems include moderator circuits, steam generators, turbine-generator sets supplied by Indian manufacturers and associated auxiliary systems certified by the Atomic Energy Regulatory Board.

A later addition, often referred to as the Kakrapar-3 unit, is a 700 MW PWR of the IPWR/VVER lineage adapted for Indian use, incorporating zirconium alloy cladding, low-enriched uranium fuel, and improved digital instrumentation and control systems. This unit reflects technology transfer and design inputs influenced by global reactor vendors, materials research at Indira Gandhi Centre for Atomic Research, and quality assurance from entities like Bhabha Atomic Research Centre and Centre for Development of Advanced Computing for plant simulation models. Key safety subsystems include emergency core cooling systems, containment structures, and redundant power supplies integrated with national regulatory standards.

Operational History and Incidents

Units 1 and 2 entered commercial operation in the early 1990s after commissioning tests overseen by the Atomic Energy Regulatory Board and formal approvals from the Department of Atomic Energy (India). The plant has undergone periodic maintenance outages coordinated with the Power Grid Corporation of India and notified to stakeholders including the Ministry of Power (India) and regional distribution companies. Notable events include planned refurbishment activities, fuel handling campaigns supervised by Bhabha Atomic Research Centre personnel, and system upgrades executed by contractors linked to Bharat Heavy Electricals Limited and Nuclear Fuel Complex.

In the 2010s and 2020s, Kakrapar attracted attention due to incidents that prompted investigations by the Atomic Energy Regulatory Board and parliamentary oversight from the Standing Committee on Energy. Responses involved root-cause analysis by technical committees drawing expertise from Bhabha Atomic Research Centre, Atomic Energy Commission of India, and international peer reviews by organizations such as the International Atomic Energy Agency. Outages have been followed by corrective actions, enhanced maintenance protocols, and transparency measures with local administrations in Surat district and state regulators in Gujarat.

Safety and Environmental Impact

Safety frameworks for the station are governed by statutory requirements of the Atomic Energy Regulatory Board and policy guidance from the Department of Atomic Energy (India), with emergency preparedness involving coordination with the National Disaster Management Authority (India), district authorities in Surat district, and community outreach programs. Environmental monitoring encompasses radioecological surveys, aquatic impact assessments for the Tapi River basin, and effluent control consistent with norms from the Central Pollution Control Board (India).

Radiation protection practices employ dose monitoring, occupational safety protocols from Bhabha Atomic Research Centre, and regulation-driven public exposure limits aligned with recommendations from the International Commission on Radiological Protection and International Atomic Energy Agency. Biodiversity assessments consider local habitats and coastal ecosystems linking to agencies such as the Ministry of Environment, Forest and Climate Change and regional conservation groups. Waste management integrates spent fuel handling at the Nuclear Fuel Complex and long-term planning coordinated with national radioactive waste policy instruments and research at Indira Gandhi Centre for Atomic Research on reprocessing and transmutation concepts.

Future Expansion and Upgrades

Future plans for the site have involved capacity augmentation through additional units and technology upgrades consistent with national energy targets set by the Ministry of Power (India) and strategic roadmaps from the Department of Atomic Energy (India). Proposals include deployment of standardized 700 MW class reactors and potential deployment of advanced designs drawing on expertise from Bhabha Atomic Research Centre, international collaborations, and domestic industry partners such as Tata Power, Larsen & Toubro, and Bharat Heavy Electricals Limited.

Modernization efforts emphasize digital instrumentation, enhanced severe-accident mitigation systems, and seismic retrofitting informed by research at Indian Institute of Science and Indian Institute of Technology Bombay. Socioeconomic planning involves coordination with state authorities in Gujarat, local governance in Mandvi, Surat district, and stakeholder engagement guided by the Ministry of Environment, Forest and Climate Change to address land use, workforce development, and long-term decommissioning strategies aligned with national nuclear policy.

Category:Nuclear power stations in India