Spallation Neutron Source Hydrogen Relief Analysis for the Cryogenic Moderator System

Journal Article · 09 July 2023 · IOP Conference Series. Materials Science and Engineering

DOI: https://doi.org/10.1088/1757-899x/1301/1/012098 · OSTI ID:2462887

DeGraff, Brian D.  ^[1]; Howell, Matthew  ^[1]; Dominguez-Ontiveros, Elvis  ^[1]; Goth, Nolan  ^[1]; Williams, Wesley ^[1]; Winder, Drew E.  ^[1]

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1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The Spallation Neutron Source at Oak Ridge National Laboratory operates the Cryogenic Moderator System (CMS) which provides hydrogen cooling at 20K to three neutron moderators. Each hydrogen loop is protected by multiple burst discs and reclosing relief valves. As a result of the Proton Power Upgrade project, the CMS moderator loops will hold more hydrogen and thus require piping modifications. Operational experience has demonstrated that transient pressure increases in these hydrogen loops occasionally result in the rupture of the burst discs. The causes for pressure transients in the system that might lead to hydrogen venting are varied and complex, for example loss of vacuum or cooling. Dynamic simulation and analysis of the parameters considered as the worst-case relief venting scenario were performed and will be presented.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 2462887
• Journal Information: IOP Conference Series. Materials Science and Engineering, Journal Name: IOP Conference Series. Materials Science and Engineering Journal Issue: 1 Vol. 1301; ISSN 1757-8981
• Publisher: IOP PublishingCopyright Statement
• Country of Publication: United States
• Language: English