Process for Obtaining TI Waiver for Recalcitrant Radionuclides at DOE Sites - 18225

Conference · Sun Jul 01 04:00:00 EDT 2018

OSTI ID:22975392

Freedman, Vicky; Rockhold, Mark; Yonkofski, Catherine; Fang, Yilin; Zhang, Fred ^[1]

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1. Pacific Northwest National Laboratory, Richland, WA 99354 (United States)

The current plan for treating radioactive iodine-129 ({sup 129}I) at the 200-UP-1 operable unit (OU) within the Central Plateau at the Hanford Site is to hydraulically contain the groundwater plume using injection wells placed at the leading edge of the plume. In the previous feasibility study for the OU, no treatment technologies were identified that could achieve the federal drinking water standard of 1 pCi/L. In addition to further study to identify viable remediation technology options, efforts were initiated to assess the potential human health and environmental risks associated with using hydraulic containment of {sup 129}I, and to refine transport estimates based on evidence of attenuation. An initial step was to develop and apply a waste-site scale integrated vadose zone-aquifer model. Because viable {sup 129}I remediation technologies for the OU may not be identified in current efforts, a process to facilitate examining the suitability of a technical impracticability waiver for the OU conditions was initiated by defining the monitoring data analysis, documentation, and simulation support that would be needed for obtaining a waiver. (authors)

• Research Organization: WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
• OSTI ID: 22975392
• Report Number(s): INIS-US--20-WM-18225
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
AQUIFERS
ATTENUATION
CONTAMINATION
DATA ANALYSIS
DRINKING WATER
FEASIBILITY STUDIES
GROUND WATER
HANFORD ENGINEERING DEVELOPMENT LABORATORY
HYDRAULICS
INJECTION WELLS
IODINE 129
MAXIMUM ACCEPTABLE CONTAMINATION
RADIATION HAZARDS
RADIATION MONITORING
REMEDIAL ACTION