Speaker
Robert Duckworth
(Oak Ridge National Laboratory)
Description
To pump the ITER torus exhaust gas from the regenerating torus cryopumps, which will be a mixture of deuterium, tritium, and helium with trace impurities, a prototype cryoviscous compressor (CVC) has been designed, fabricated, and is under test. This prototype, which was based on success ful demonstration of a sub-scale version, consists of a set of 24 5-cm diameter, 1.27-m long stainless steel tubes with embedded static mixer flow enhancements that is cooled with supercritical helium (SCHe) to cryopump the hydrogenic species while allowing helium to be exhausted through the CVC. In order to test the CVC, flow controls and vacuum jacketed piping were installed at a connection to the Cryogenic Test Facility (CTF) at the Spallation Neutron Source to cool the CVC with SCHe supplied at 4.5K and 3 bar. Helium heated to 20-30 K is used to regenerate the CVC. The CVC is designed to pump up to 20,000 Pa-m3 of deuterium that is mixed with 100 Pa-m3 helium gas with a flow rate of 200 Pa-m3/s. The integrated operation of the CVC with the CTF will be presented along with the performance test results of the CVC.
*This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan.*
Author
Robert Duckworth
(Oak Ridge National Laboratory)
Co-authors
Larry Baylor
(Oak Ridge National Laboratory)
Matthias Dremel
(ITER)
Michael Hechler
(US ITER Project Office, Oak Ridge National Laboratory)
Michael MOrrow
(Oak Ridge National Laboratory)
Robert Pearce
(ITER)
Steven Meitner
(Oak Ridge National Laboratory)
Tam Ha
(Oak Ridge National Laboratory)
