Conceptual Model of Subsurface Processes for Iodine at the Hanford Site

Technical Report · Sun Sep 30 04:00:00 EDT 2018

DOI:https://doi.org/10.2172/1485277· OSTI ID:1485277

Qafoku, Nikolla P. ^[1]; Bagwell, Christopher E. ^[1]; Lawter, Amanda R. ^[1]; Truex, Michael J. ^[1]; Szecsody, James E. ^[1]; Qafoku, Odeta ^[1]; Kovarik, Libor ^[1]; Zhong, Lirong ^[1]; Mitroshkov, Alexandre V. ^[1]; Freedman, Vicky L. ^[1]

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1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Currently, there are large dilute ¹²⁹I groundwater plumes at Hanford, including a groundwater plume in the 200-UP-1 operable unit (OU) located within the Central Plateau of the Hanford Site. The interim record of decision for the 200-UP-1 OU requires that the U.S. Department of Energy evaluate potential treatment options for ¹²⁹I through further technology evaluation. The approach to the evaluation was defined in the ¹²⁹I technology evaluation plan and includes an update to the conceptual model (CM) for the plume, as required by the 200 UP 1 remedial design/remedial action work plan. This report describes an updated CM of subsurface processes that affect ¹²⁹I behavior in the subsurface. This CM was developed to address identified data gaps and to provide input for fate and transport modeling needed to support the remedy evaluation. A significant advancement from previous the CM for the 200-UP-1 OU is recognition of the multiple iodine species in the subsurface and the biogeochemical processes that control their fate and transport.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1485277
• Report Number(s): PNNL--28053
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES