Supercomputing and Computation


Flow and Heat Transfer Simulations for ITER’s CVC

Problem Statement:

  • ITER has unique vacuum pumping requirements due to high throughput tritium operation. The roughing system cannot use conventional pumps; therefore a cryopump (CVC) is developed at ORNL to effectively pump the hydrogenic species, while allowing helium impurities to be exhausted to atmosphere. A single tube prototype was built and a full prototype is in progress.

Technical Approach:

  • Steady heat and flow calculations were performed with CFX in order to estimate the pump efficiency and test the different inserts in the tubes. Helium and hydrogen flows are computed simultaneously, including the heat transfer in the solid parts.


  • A better understanding was achieved on the performance of CVC. The simulations provided several improvements in the CVC design.

PI: Larry Baylor


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