Share

IIR document

Design of the 80 K helium circulation loops for ITER.

Number: pap. 4

Author(s) : SIMON M., SAULQUIN S., KOUZMENKO G., et al.

Summary

The thermal shields of the ITER machine must be cooled using helium circulating at 80 K. The ITER cryopumps also require intermittent helium cooling power at this temperature level. As a result two forcedflow helium cooling loops supplied by liquid nitrogen have been developed. Each 80 K loop comprises of an integrally geared centrifugal compressor able to compress up to 4 kg/s between 1.6 and 1.8 MPa and a perlite insulated cold box. This paper outlines the process requirements for the 80 K loops and the process design chosen in order to answer them. It justifies the technology chosen for the compressors and explains how the associated shaft seal leaks are being treated. Finally, it describes significant features of the cold boxes including the selection
of a diffusion bonded stainless steel heat exchanger as well as associated key control loops.

Available documents

Format PDF

Pages: 10

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Design of the 80 K helium circulation loops for ITER.
  • Record ID : 30018331
  • Languages: English
  • Source: 1st IIR International Conference of Cryogenics and Refrigeration Technology (ICCRT 2016). Proceedings: Bucharest, Romania, June 22-25, 2016.
  • Publication date: 2016/06/22
  • DOI: http://dx.doi.org/10.18462/IIR.ICCRT.2016.0004

Links


See other articles from the proceedings (32)
See the conference proceedings

Indexing