Numerical study on aerosol sampling in a nuclear facility duct with a 90-degree elbow

Conference · Mon Dec 30 04:00:00 EST 2024

DOI:https://doi.org/10.2172/2570258· OSTI ID:2570258

Han, Kai ^[1]

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1. Savannah River Nuclear Solutions (SRNS), Aiken, SC (United States)

Due to the challenging design requirements, elbows are often unavoidable in duct configuration, and these 90-degree bends introduce swirl, velocity variations, recirculation, and secondary flow. These disturbances make it difficult for nuclear facilities to meet particle sampling standards. A series of numerical analyses are conducted to track aerosols in a nuclear facility duct having a 90-degree elbow with the assistance of computational fluid dynamics (CFD). A turbulence model, a continuity, and a momentum, a discrete phase model, and species transport equations are solved simultaneously to track aerosols in the duct. The effect of turbulence models, turbulent dispersion models, droplet drag model, aerosol amount, aerosol spray configuration, guide vanes, and mixers are investigated. Simulation results are analyzed per relevant testing codes such as DOE-HDBK-1169, ASME AG1, ISO 14644-3, ACGIH, and ANSI/HPS N13.1.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• Sponsoring Organization: DOE; EM
• DOE Contract Number: AC09-08SR22470
• OSTI ID: 2570258
• Report Number(s): SRNS-STI-2024-00638
• Country of Publication: United States
• Language: English