Walter Tosto SpA has significant skills and know-how in the supply of critical equipment thanks to the acquisition of Bosco Industrie Meccaniche SpA
in the early sixties.
Walter Tosto's activities in the Nuclear field were successfully carried on up to 1987, when a referendum in Italy stopped the Italian nuclear power generation plan. However, Water Tosto continued to collaborate with research organizations such as INFN
(Istituto Nazionale Fisica Nucleare - National Institute of Nuclear Physics – Assergi – AQ) and Princeton University
for the Dark Side Project
The Dark side project is a programme of experiments based on innovative detectors which aim to take dark-matter detection to a new level of sensitivity.
Thanks to these collaborations, in 1997 Walter Tosto took part in the Borexino
project for the supply of a sphere and a cylinder in Pure 316 LN Stainless Steel. Borexino is an international experiment, in the Gran Sasso National Laboratory of Italy
located underground and dedicated to the observation of low-energy solar neutrinos.
Today, Walter Tosto SpA is fully able to manufacture components and items for the nuclear island like Steam Generators
and relating components for heat transfer of the primary loop. For secondary loops, the company is able to manufacture equipment like HP/ LP feedwater preheaters, HP heat exchangers, condensers, steam drums, deaerators and water tanks
One of the most important projects in the nuclear field in which we are involved is the ITER project
(International Thermonuclear Experimental Reactor). This project represents the ultimate innovation in the development of the Fusion for Energy. ITER will be the first fusion plant with dimensions comparable to a conventional power plant, and it is committed to demonstrate the scientific and technological feasibility of the fusion as an energy source. The ITER project has global significance
and it is sponsored by the European Union, Japan, Russia, United States, China, South Korea and India. Fusion for Energy
(F4E) has signed a contract for the supply of seven sectors of the ITER vacuum vessel with the AMW
European consortium (Ansaldo Nucleare S.p.A, Mangiarotti S.p.A and Walter Tosto S.p.A
). The (almost) 300 million EUR contract, expected to run for 6 years, is the biggest single work package of Europe's contribution to ITER and it is the largest component of the ITER device. The complexity of the vacuum vessel, its size, the amount of welding required and the degree of precision which is needed to build the component, brand this contract as one of the most important and technologically challenging of the ITER project.
||VACUUM VESSEL SECTORS|
Iter, from latin, means "way". It is the main international experiment with the purpose
of demonstrate scientific and technical feasibility of the "fusion" as the new source of energy.
|Cassette body prototype
||SSS for ITV
WT is sub contractor di ANN
|Casings for JT-60-SA
The ITER vacuum vessel is located inside the cryostat of the ITER device and its basic function is to operate as the chamber that hosts the fusion reaction. Within this torus-shaped vessel, plasma particles collide and release energy without touching any of its walls due to the process of magnetic confinement. The vacuum vessel is composed of nine sectors made of thick special grade stainless steel and each sector is 13 meters high, 6.5 meters wide and 6.3 meters deep.
All of the sectors are similar and are built with double-walls containing the bolted-on shielded plates with a pressured inter-space which combine to attenuate the thermonuclear flux so as to avoid overheating of the super conducting coils. The weight of each sector is approximately 500 tons and the weight of the entire component, when welded together, will reach an impressive total of 5000 tons, which is equivalent to the weight of the Eiffel Tower.
Currently underway is the JT-60SA
project in collaboration with Enea,
the supply of 18 components of casings for the superconducting toroidal coils of the experimental Tokamak JT60-A.