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  • Pre-compression ring facility | Ready to exert serious pressure

    The tool is ready; the first prototypes are on their way. Soon, a specialized test bench at CNIM (France) will enter into service to verify the resistance of th [...]

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  • Internal auditor | A partner in identifying solutions

    ITER's new internal auditor Friedrich Lincke goes where his expertise is needed to make a difference. Armed with valuable experience from many years of service [...]

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  • Sub-assembly tools | A 12-tonne beam, a crane and a little push

    There is nothing remarkable about lifting a 12-tonne beam. Except when it happens in the spectacular setting of the ITER Assembly Hall, and the beam needs to be [...]

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  • Hiring | Skilled candidates wanted

    In 2018 the number of staff members employed by the ITER Organization increased to 858, as skilled and qualified candidates joined from each of the seven ITER M [...]

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  • Toroidal field coils | First ITER magnet arrives this year

    A major milepost is projected for 2019 as the first of ITER's powerful, high-field magnets is scheduled to arrive from Japan. Let's take a look behind the scene [...]

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Of Interest

See archived entries

Along skid row

They look like perfectly aligned emergency housing units. But of course they're not: the 18 concrete structures in the ITER cryoplant are massive pads that will each support one 25-tonne helium compressor skid. What appears as "windows" in the concrete blocks are but passages for the dense interconnecting piping.

Work underway in the cryoplant to prepare for the arrival of 18 helium screw compressor skids. Each one of the 25-tonne units will be installed on top of its own four-metre-high concrete pad. (Click to view larger version...)
Work underway in the cryoplant to prepare for the arrival of 18 helium screw compressor skids. Each one of the 25-tonne units will be installed on top of its own four-metre-high concrete pad.
The concrete blocks are decoupled from the floor in order to prevent vibrations from being transmitted to other systems.
 
Eighteen helium compressor units will be grouped in the liquid helium plant and operated in parallel to provide the necessary gas flow for the liquid helium cooling needs of the Tokamak. The Compressor Building of the cryoplant will also house other helium compressors as well as compressors for the liquid nitrogen plant.
 
The helium compression system of the liquid helium plant involves the use of oil-flooded screw compressors and a large amount of oil. The fact that the compressors are installed at a height of approximately four metres allows the oil to regain the oil separation system through gravity.
 
In the 3,400 m² available in the Compressor Building, contractors will install 18 oil-flooded screw compressors for the helium plant as well as other helium compressors and compressors for the liquid nitrogen plant. (Click to view larger version...)
In the 3,400 m² available in the Compressor Building, contractors will install 18 oil-flooded screw compressors for the helium plant as well as other helium compressors and compressors for the liquid nitrogen plant.
Oil acts as a lubricant in the compressor system, and also takes away some of the heat from the cycle. Following compression, the helium (all oil removed) flows to the liquid helium cold boxes in the adjacent building.

In general, the heat generated by the compressors of the liquid helium plant will be evacuated by the flow of a large volume of cooling water—equivalent to 2,500 m3/hour. A part of the thermal energy will be recovered (approximately 12 MW) and used in the heating of other ITER buildings.

The Compressor Building occupies more than half of the space (3,400 m²) available in the cryoplant.


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