Larsen & Toubro
About Us
The L&T Group
Overview
Innovation
Awards & Recognition
Annual Review
Corporate Policies
Leadership
Board of Directors
Chairman Emeritus
Businesses
Sustainability
Careers
Overview
Campus Engage
Learning & Development
Diversity, Equity & Inclusion
Renew
Recruitment Caution
Investors
News & Stories
Contact Us
Investors
News & Stories
Contact Us
  • Corporate
  • ITER CRYOSTAT
About L&T Group
Overview
Innovation
Awards & Recognition
Annual Review
Board of Directors
Chairman Emeritus
Corporate Policies
Businesses
Construction
Energy
Manufacturing
Services
Allied Businesses
Careers
Overview
Campus Engage
Learning & Development
Diversity, Equity & Inclusion
Renew
Recruitment Caution
Contact Us

View all Contacts

Larsen & Toubro Limited
CIN – L99999MH1946PLC004768
L&T House, N.M. Marg, Ballard Estate, Mumbai, Maharashtra - 400 001

Tel: +91 22 67525656
Fax: +91 22 67525858
Send us a mail: infodesk@larsentoubro.com

Sustainability

Follow Us

  • Copyright & Terms
  • Privacy Policy

© 2026 LARSEN & TOUBRO LIMITED. All rights reserved.


When brilliant minds across multiple countries came together to harness the immense power of nuclear fusion, to gift humanity an engineering marvel of limitless, clean energy, we were proud to play our part. To take a leap of certainty. Of precision. Of exactness.

The International Thermo-nuclear Experimental Reactor (ITER) is an international collaborative project, involving contributions from seven-member entities - China, European Union, India, Japan, Russia, S. Korea, and USA. ITER is building the world's largest facility to demonstrate the scientific and technical feasibility of fusion power at Cadarache in the South of France. ITER-India - the Indian Domestic Agency (IN-DA) responsible for delivering India's contributions to the ITER Project - is a specially empowered project organization, within the Institute for Plasma Research, which is an autonomous institute under the Department of Atomic Energy (DAE), Government of India.

L&T Heavy Engineering is proud to have been chosen by ITER-India for the manufacturing and installation of the ITER Cryostat.

What is the Cryostat?

The Cryostat, a key part of the ITER fusion reactor facility, is the World’s largest Vacuum application Stainless Steel vessel. A fully welded cylindrical vacuum/pressure chamber made of stainless steel, the Cryostat is designed with an overall dimension of 29.3-meter diameter, 29.6-meter height and a finished weight of more than 3500 metric tonnes. Thickness of the vessel ranges from 50 mm to 250 mm.

Scope of work

From design concept to detailed engineering, metallurgy, welding technology, fabrication technology, forming, machining, inspection & quality control and finally, the training of the people involved in the project, L&T has been involved in every aspect of building the Cryostat.

  • Manufacturing & Supply of Base Section weighing 1060 T, Lower Cylinder weighing 376 T, Upper Cylinder weighing 357 T and Top Lid weighing 606 T.
  • Creating a workshop at the ITER site (Cadarache) to assemble the above sections.
  • Manufacture and supply of Tokamak Pit Assembly Tools of ~850 T and Loose items of ~ 500 T
  • Final installation of Cryostat (04 sections and Loose items) in the Tokamak Pit
Video Play Icon

This prestigious project is both an opportunity and a showcase for the capabilities within L&T Heavy Engineering, putting us in a select group of global companies. A project that will be a breakthrough in the development of global nuclear fusion energy for mankind.

Related Links

  • ATAL SETU
  • BENGALURU KEMPEGOWDA AIRPORT
  • INDIAN LIGHT TANK
  • CHANDRAYAAN 3