Multiple Ion Exchange Column Runs for Cesium and Technetium Removal from AW-101 Waste Sample

Validation and Application of Concentrated Cesium Eluate Physical Property Models

“…[Pierce, 2003] for Al, Ca, and K are below the detection limits cited in Ref. [Hassan, 2003]. There is also some general agreement in the relative amounts of Cs and Na present in each reference.…”

“…Derivation of model input data for radioactive run -The full composition of the most representative radioactive AW-101 cesium eluate sample was derived from available analytical data [Hassan, 2003] and converted into the scaled weight fractions based on the six major cations only, including Al, Ca, Cs, H, K, and Na.…”

“…The data given in Table 2-6 through Table 2-8 came from Ref. [Hassan, 2003]; only cesium eluate data from Cycles 1 to 5 were used because of excessive dilution in Cycle 6. The cesium data given in Table 2-7 are based on the 137 Cs activity of 86.6 Ci/g and the measured feed 137 Cs distribution of 26% of total Cs.…”

“…The data given in Table 2-9 came from a system containing nitrate as the only anion. [Hassan, 2003] (µg/mL) 86.5 1760 n/a n/a n/a n/a (mol/liter) 0.0006 0.0765 n/a n/a n/a n/a PROPOSED (µg/mL) 86.5 1760 135 1.9 367 n/a (mol/liter) 0.0006 0.0765 0.0050 <0.0001 0.0094 n/a Several items are worth noting. The data from Ref.…”

“…The amounts of "other" elements that ought to be included in a proposed AW-101 composition are difficult to determine using only the data of Ref. [Hassan, 2003]; due to high dilution factors, many of the detection limits are high. At the same time, many "other" compounds were measured in concentrations that are much higher than would be anticipated based on knowledge of the tanks and expected performance of the ion exchange resins.…”