JESS seminar, Subsurface Simulation at Hanford, 12 p.m., West 133
12 p.m., Friday, October 18
Presented by Dr. Vicky Freedman, Senior Research Scientist. Pacific Northwest National Laboratory
Because subsurface modeling plays an important role in characterizing site conditions, assessing risks, and evaluating remedial alternatives, the Office of Environmental Management (EM) within the Department of Energy (DOE) has recently invested in developing a numerical modeling toolset called ASCEM (Advanced Simulation Capability for Environmental Management) to support modeling analyses at legacy waste sites. This investment has included the development of an open-source, high performance simulator (Amanzi) that is tightly integrated with an open-source platform that is specifically designed to handle subsurface simulation workflows (Akuna).
To demonstrate this new workflow technology, modeling is performed for technetium-99 (99Tc) transport at the BC Cribs site, a legacy waste area at the Hanford Site. Currently, innovative remedial technologies are being explored at BC Cribs to address recalcitrant 99Tc contamination in the deep (~100 m) vadose zone. Impacts of a “no-action” alternative are investigated to establish baseline conditions for determining the effectiveness of remedial actions. Conceptualization of the system is highly uncertain because only sparse information is available for the geologic conceptual model, the physical and chemical properties of the sediments, and the history of waste disposal operations.
Although the simulations are computationally demanding, the analysis of multiple conceptual model realizations is possible through the use of high performance computation. The use of multiple conceptual model realizations in the analysis also demonstrates that a wider range of prediction uncertainty results than when a single conceptual model is used.
The Joint Engineering and Science Seminar (JESS) series is an interdisciplinary effort of the College of Arts and Sciences and the Office of Professional Programs at WSU Tri-Cities. Admission is free and open to the public; graduate students, post-docs and professionals are especially encouraged to attend.
For more information, contact:
Dr. Yonas Demissie
Assistant Professor of Civil & Environmental Engineering
Nikolaos Voulgarakis, Ph.D.
Assistant Professor of Mathematics