AERB issues permission for major equipment erection at Kudankulam Nuclear Power Project

The Atomic Energy Regulatory Board (AERB) issued permission for Major Equipment Erection at Units 5 and 6 of the Kudankulam Nuclear Power Project (KKNPP) on ...

What Happened

The Atomic Energy Regulatory Board (AERB) issued permission for Major Equipment Erection at Units 5 and 6 of the Kudankulam Nuclear Power Project (KKNPP) on April 30, 2026.
This permission authorises the Nuclear Power Corporation of India Limited (NPCIL) to install major equipment including the Reactor Pressure Vessel, Steam Generators, and Coolant Pumps.
The clearance follows a multi-tier safety review of the design of both units against AERB's prescribed safety requirements, as well as an assessment of civil construction progress under an earlier permission granted in April 2021 for First Pour of Concrete (FPC).
Unit 5 is projected to be ready for commissioning by December 2026, while Unit 6 is targeted for September 2027.

Static Topic Bridges

Atomic Energy Regulatory Board (AERB)

AERB is India's nuclear regulatory authority, constituted on November 15, 1983 under Section 27 of the Atomic Energy Act, 1962. Its mandate is to enforce rules and regulations under the Atomic Energy Act, 1962 and the Environment (Protection) Act, 1986 to ensure radiological safety. AERB prescribes acceptance limits for radiation exposure, grants consent at each stage of nuclear facility construction and operation, reviews emergency preparedness plans, and enforces licensing of personnel at nuclear installations. Its regulatory authority is derived from the Atomic Energy Act, 1962 — the overarching legislation governing all atomic energy activities in India.

Constituted: November 15, 1983 by Presidential order under Section 27 of the Atomic Energy Act, 1962
Headquarters: Mumbai
Issues consent at multiple stages: siting, construction (First Pour of Concrete), equipment erection, pre-commissioning, and operation
Regulatory authority supplemented by Section 35A of the Banking Regulation Act and the Environment (Protection) Act, 1986 for radiation-related environmental matters

Connection to this news: The AERB's permission for Major Equipment Erection is a critical regulatory gate in the nuclear plant lifecycle — it confirms that civil structures have achieved the required integrity to support heavy reactor components, and that the overall design complies with safety codes for Light Water Reactors.

Pressurised Water Reactors (VVER Design)

VVER (Vodo-Vodyanoy Energetichesky Reaktor) is the Russian variant of the Pressurised Water Reactor (PWR) design. In PWRs, ordinary (light) water serves as both the coolant and the neutron moderator. The primary coolant loop is kept under high pressure to prevent the water from boiling, and heat is transferred to a secondary loop that drives the turbines. VVER reactors are notable for their passive safety systems that can cool the reactor without external power in an emergency.

KKNPP Units 5 & 6 are VVER-1000 reactors, each rated at 1,000 MW(e)
Designed with passive safety systems and double containment structures
Built in technical collaboration with Russia's Rosatom state corporation
AERB has specified a Safety Code on Design of Light Water Reactor-based NPPs that these units must comply with

Connection to this news: The safety review underpinning the equipment erection permission is conducted against AERB's Safety Code specifically designed for Light Water Reactors, which includes VVER-type PWRs. The passive safety features of VVER-1000 are central to AERB's multi-tier review framework.

India's Nuclear Power Programme and Energy Security

India has the world's third-largest nuclear power expansion programme. Nuclear energy is a key component of India's long-term energy security strategy, given the country's commitment to increasing the share of non-fossil fuels in its electricity mix. India's civil nuclear cooperation agreements, most notably the India-US Civil Nuclear Agreement (2008) and bilateral agreements with Russia, have enabled access to advanced reactor technology and fuel supply.

NPCIL is the sole public sector undertaking responsible for nuclear power generation in India
India imports nearly 90% of its crude oil, making domestic nuclear capacity critical for energy independence
Kudankulam is India's largest nuclear power station by installed capacity (6 units × 1,000 MW = 6,000 MW when complete)
India aims to raise nuclear power capacity to 22,480 MW by 2031-32

Connection to this news: The commissioning of Units 5 & 6 will add 2,000 MW of clean baseload capacity, directly supporting India's energy security goals and its Nationally Determined Contributions (NDCs) under the Paris Agreement.

Key Facts & Data

KKNPP is located in Tirunelveli district, Tamil Nadu
Total planned capacity: 6 units × 1,000 MW(e) each = 6,000 MW (when all units are operational)
Units 1 & 2 are operational; Units 3, 4, 5 & 6 are under construction
Unit 1 achieved criticality on July 13, 2013; Unit 2 on July 10, 2016
Units 5 & 6 follow VVER-1000 design with advanced passive safety features including double containment
The April 2021 FPC permission was the previous milestone; the April 2026 equipment erection permission is the next major regulatory gate
Unit 5 commissioning target: December 2026; Unit 6 target: September 2027
NPCIL operates under the Department of Atomic Energy (DAE), which reports directly to the Prime Minister