Progress Report on Model Development for the Transport of Aerosol Through Microchannels

Technical Report · Thu Jul 30 04:00:00 EDT 2020

DOI:https://doi.org/10.2172/1819609· OSTI ID:1819609

Chatzidakis, Stylianos ^[1]

---

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

Accuracy of consequence assessments could be improved by accounting for the leak path deposition of aerosol in the source term. Recent experimental measurements from Sandia (2018) provided evidence of partial microchannel plugging due to particulate deposition. This filtration effect is relevant to the source term assessments and it is not unreasonable to anticipate that aerosol deposition in more realistic geometries could even lead to complete plugging of the leak path. This report summarizes current progress (as of end of Q3 FY 2020) on the development of a phenomenological model of aerosol transport, deposition, and plugging through microchannels. The purpose is to introduce a generic, reliable numerical model for the prediction of aerosol transport, deposition, and plugging in leak paths while accounting for potential plugging formation. This report includes (1) an overview of recent additions and improvements on the recently developed numerical model to analyze the various deposition processes in leak paths, to provide quantitative estimates of penetration factors, and to gain an understanding of the variables that affect them and (2) a summary of recent benchmarking results of the model’s validity with recent experimental measurements from Sandia.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE), Office of Spent Fuel and Waste Disposition. Office of Spent Fuel and Waste Science and Technology
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1819609
• Report Number(s): ORNL/SPR-2020/1599
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES