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The Cryostat forms the vacuum-tight container surrounding the ���ߺ��� vacuum vessel and the superconducting magnets - essentially acting as a very large refrigerator. It will be made of stainless steel with thicknesses ranging from 50 mm to 250 mm. The structure will have to withstand a vacuum pressure of 1 x 10 -4 Pa; the pump volume is designed for 8,500 m3. Its overall dimensions will be 29.4 meters in diameter and 29 meters in height. The heavy-weight will bring more than 3800 tons onto the scale - making it the largest vacuum vessel ever built out of stainless steel. 

The Cryostat will have 23 penetrations allowing internal access for maintenance, as well as over 200 penetrations—some as large as four metres in size - providing access for the cooling systems, magnet feeders, auxiliary heating, diagnostics, and the removal of blanket and parts of the divertor. Large bellows are used between the Cryostat and the vacuum vessel to allow for thermal contraction and expansion in the structures. 

India, being one of the seven Members of the ���ߺ��� project, is in charge of procuring the Cryostat. On 17 August, Shishir Deshpande, Project Director of ���ߺ���-India and Anil Parab, Vice President of the L&T Heavy Engineering division, signed the contract for manufacturing of the ���ߺ��� Cryostat. 

The design of the ���ߺ��� Cryostat represented a huge international endeavour involving engineers and technicians from both the ���ߺ��� and the Indian Domestic Agency. “The Cryostat is an essential part of the ���ߺ��� machine. Seeing this huge component taking shape in the factory is certainly important and encouraging news. It means that the ���ߺ��� project has entered a decisive phase.” ���ߺ��� Director-General Osamu Motojima said. 

The Cryostat will be manufactured by the Heavy Engineering division of L&T at its Hazira plant, near Surat in Western India, in the state of Gujarat. It will be dispatched in 54 modules to the ���ߺ��� site in Cadarache, as it cannot be transported in its entire size. Pre-assembly of the Cryostat modules will be done in a temporary workshop at the ���ߺ��� site and then transported to the tokamak pit where they will be welded together by using the advanced “narrow groove all position gas tungsten arc welding technique”. 

Mr. M.V. Kotwal, Member of L&T board and President of L&T Heavy Engineering stated: "L&T is proud to be part of this mammoth global collaborative research to build a greener planet.” 

L&T is a USD 12.8 billion technology, engineering, construction, manufacturing and financial services conglomerate, with global operations. It is one of the largest and most respected companies in India's private sector. More than seven decades of a strong, customer-focused approach and the continuous quest for world-class quality have enabled it to attain and sustain leadership in all its major lines of business. L&T has an international presence, with a global spread of offices. A thrust on international business has seen overseas earnings grow significantly. It continues to grow its global footprint, with offices and manufacturing facilities in multiple countries. The company's businesses are supported by a wide marketing and distribution network, and have established a reputation for strong customer support. 

���ߺ��� has been established to demonstrate the scientific and technological feasibility of fusion power. ���ߺ��� is a unique international collaboration bringing together China, the European Union, India, Japan, Korea, Russia and the USA. 

For more information on ���ߺ���, please visit www.iter.org.

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CONTACT

Michel Claessens 
+33 (0)4. 42.17.66.13 
michel.claessens@iter.org