Performance assessment for the disposal of low-level waste in the 200 West Area Burial Grounds

Diffusion and Leaching of Selected Radionuclides (Iodine-129, Technetium-99, and Uranium) Through Category 3 Waste Encasement Concrete and Soil Fill Material

“…Some of the radionuclides in category 3 waste that have been identified as long-term dose contributors are iodine-129, selenium-75, technetium-99, and uranium-238 (Wood et al 1995, Mann et al 1998. For solid waste encased in concrete, the radionuclides most likely to leach include iodine-129, selenium-75, and technetium-99 because of their anionic nature in aqueous solutions (Serne et al 1989(Serne et al , 1992a.…”

White paper updating conclusions of 1998 ILAW performance assessment

“…However, n o d y it is the sum of these impacts over materials at the point of impact that is important. Thus, as shown by the previous Hanford Site performance assessments (Kinceid 1995, Wood 1994, and Wood 1996), and particularly the last version of the L A W PA (Mann 1998a), the most mobile materials have the highest impacts because they are predicted to reach the accessible environment (presumably the groundwater) within the compliance period of 1, OOO to l 0, OOO yean after disposal facility closure. Contaminants that react with the soils via sorption and precipitation fbrmin in the vadose zone (the unsaturated re@on between the near surface and the unconfined aquifer) for much longer periods of time.…”

Addendum to Composite Analysis for Low-Level Waste Disposal in the 200 Area Plateau of the Hanford Site

“…• post-1988 solid waste burial ground in the 200 West Area (Wood et al 1995) • post-1988 solid waste burial ground in the 200 East Area (Wood et al 1996) • Environmental Restoration Disposal Facility (ERDF) (DOE-RL 1994) • disposal facilities for immobilized low-activity wastes (ILAW) (Mann et al 1998(Mann et al , 2001 The Composite Analysis is part of the documentation required in U.S. Department of Energy (DOE) Order 435.1 for the continued and planned low-level radioactive waste (LLW) and Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) waste disposal operations at these four facilities.…”