MUMBAI: The fifth unit of the 1,000-MW Kudankulam Nuclear Power Project in Tamil Nadu, a joint venture between India and Russia, achieved a significant milestone on Monday with the erection of the reactor pressure vessel inside the reactor building, as confirmed by the Nuclear Power Corporation of India Limited (NPCIL). Current indications suggest that the fifth unit is slated to become operational towards the end of this year.
Clearance and Installation Process
This milestone was achieved after receiving clearance from the Atomic Energy Regulatory Board. The reactor pressure vessel, which serves as the heart of a nuclear power plant by housing the reactor core where nuclear fission occurs, weighs approximately 320 tonnes. It was lifted and installed using a specialized heavy-lift crane.
Collaboration and Progress
NPCIL stated, "This milestone reflects the close coordination and dedicated efforts of NPCIL and Atomstroyexport, Russian Federation. The successful erection of the vessel demonstrates the steady progress being made towards the completion of Unit 5, reinforcing NPCIL's commitment towards nation’s clean energy transition."
Overview of the Kudankulam Site
The Kudankulam site comprises six units, each with a capacity of 1,000 MW. Units 1 and 2 are already operational. As of May 2026, they have cumulatively generated about 130 billion units of electricity, averting the release of approximately 112 million tonnes of CO2 equivalent into the environment.
Construction Status of Other Units
According to NPCIL, the third and fourth units are at an advanced stage of construction. The fifth and sixth units are at different stages of construction and are planned to be commissioned progressively. "Upon completion of these projects, Kudankulam site will have a total installed capacity of 6,000 MW," it added.
