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- W4316190330 abstract "was then validated against a series of field experiments which were designed to test the model predictions and estimate the deposition velocity occurring over the forest environment at the Savannah River Site. The field releases used deuterium oxide as a surrogate for tritium oxide and was released as a fine mist which rapidly evaporated, creating a gaseous tracer in the atmosphere. Using air samplers, the elevations in deuterium concentration in the air relative to background measurements was assessed and then modeled. Generally, the numerical model tended to underpredict the amount of deuterium being mixed from above the canopy to the forest floor, indicating that the predictions it provides are still conservative relative to what was measured during the field experiments. Across a suite of modeling runs, the 95th and 99th percentile deposition velocities were estimated to be 1.2 and 0.7 cm s-1, respectively. Estimated deposition velocities in the 2021 field experiments, which specifically assessed a release above the forest canopy and its mixing to the surface, predicted deposition velocities ranging from 1.75 to 6.61 cm s-1. While these field releases do not cover all possible meteorological conditions, it seems appropriate to use a non-zero deposition velocity when performing safety-basis modeling of tritium oxide. The recommendation presented in this report is to use 1.0 cm s-1. This is between the 95th and 99th percentile value estimated from the modeling study, suggesting it should be appropriate for the majority of release scenarios given the model’s apparent conservatism relative to field measurements." @default.
- W4316190330 created "2023-01-15" @default.
- W4316190330 creator A5085433939 @default.
- W4316190330 date "1982-03-31" @default.
- W4316190330 modified "2023-09-27" @default.
- W4316190330 title "Evaluation of Corrosion and Deposition in the 1941 Melter" @default.
- W4316190330 doi "https://doi.org/10.2172/1909001" @default.
- W4316190330 hasPublicationYear "1982" @default.
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