Author: Howell, M.P.
Paper Title Page
WEPA32 Spallation Neutron Source Cryogenic Moderator System Helium Gas Analysis System 699
 
  • B. DeGraff, L. Pinion
    ORNL RAD, Oak Ridge, Tennessee, USA
  • R. Armstrong, J. Denison, M.P. Howell, S.-H. Kim, D. Montierth
    ORNL, Oak Ridge, Tennessee, USA
  • M.D. Williamson
    LBNL, Berkeley, California, USA
 
  Funding: This work was supported by SNS through UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE.
The Spal­la­tion Neu­tron Source (SNS) at Oak Ridge Na­tional Lab­o­ra­tory (ORNL) op­er­ates the Cryo­genic Mod­er­a­tor Sys­tem (CMS). The CMS com­prises a 20-K he­lium re­frig­er­a­tor and three he­lium to hy­dro­gen heat ex­chang­ers in sup­port of hy­dro­gen cooled spal­la­tion mod­er­a­tion ves­sels. This sys­tem uses ves­sels filled with ac­ti­vated car­bon as the final major com­po­nent to re­move oil vapor from the com­pressed he­lium in the cryo­genic cold box. SNS uses a LINDE multi-com­po­nent gas an­a­lyzer to de­tect the pres­ence of con­t­a­m­i­nants in the warm he­lium flow up­stream of the cold box in­clud­ing aerosolized oil vapor. The de­sign chal­lenges of in­stalling and op­er­at­ing this an­a­lyzer on the CMS sys­tem due to nor­mal sys­tem op­er­at­ing pres­sures will be dis­cussed. The de­sign, fab­ri­ca­tion, in­stal­la­tion, com­mis­sion­ing, and ini­tial re­sults of this sys­tem op­er­a­tion will be pre­sented. Fu­ture up­grades to the an­a­lyzer sys­tem will also be dis­cussed.
 
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-WEPA32  
About • Received ※ 06 August 2022 — Revised ※ 08 August 2022 — Accepted ※ 11 August 2022 — Issue date ※ 05 October 2022
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