Special wasteform lysimeter program at the Savannah River Laboratory

Field Lysimeter Investigations - test results: Low-Level Waste Data Base Development Program: Test results for fiscal years 1994-1995

“…Those data show that cement minimizes the release of Sr-90. 30 This interesting difference should be studied further. Both data reported herein and data reported by SRL30 and PNL3I agree that Cs-137 is more readily released from cement than from VES, while PNL32 has observed Cs-137 release in trace amounts only from masonry cement waste forms, and none from portland and VES waste forms.…”

Geochemical data package for performance assessment calculations related to the Savannah River Site

“…Co 5 7 21 30 Hoeffner (1985) reported that a SRS sandy sediment (9% clay) had a Co Kd = 4.6 mL/g, pH ~4.7; SRS clayey sediment (23% clay) had a Co Kd = 29 mL/g, pH ~4.7; Co Kd values in SRS sediments were independent of Co concentration between 1e-12 to 1e-6 M Co; Co Kd values in SRS sediments decreased in presence of high divalent cation concentrations but not in presence of high monovalent cation concentrations; strong pH dependency with a slight increase in Kd from pH 2 to 4.8 (background) then sharp increase in Kd as pH increases to pH 7 (Kd = 20,000 mL/g), than as pH increased to 9.5 the Kd steadily decreased to ~20 mL/g (thus concrete Kd values should be appreciably higher than background sediment Kd values (background pH Kd = 7 and cement pH Kd = 30) (2). Oblath et al (1983) reported that SRS lysimeters studies calculated Kd values of 10 to 20 mL/g based on flow calculations. I, At 0 0 0.3 0.6 Stone et al (1985) reported iodide (I -) Kd values based on column studies to be 0.6 mL/g, which was at the low range of Kd values measured by the batch method, which ranged from 0.5 to 6.6 mL/g (texture of sediment is unknown).…”