Tank 12H Acidic Chemical Cleaning Sample Analysis And Material Balance

Martino, C. J.; Reboul, S.; Wiersma, B. J.; Coleman, Charles

doi:10.2172/1104915

Cited by 1 publication

(2 citation statements)

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“…The lowest mercury removal was observed with oxalic acid, though the total removal (31%) was higher than was reported for SRS Tank 12 following three oxalic acid cleaning cycles (<6%). 18 In future work, mercury analysis methods and results should be carefully scrutinized and controls should be used in an attempt to obtain more quantitative results. Surprisingly, concentrated oxalic acid is the most effective reagent for the removal of Ca (Figure 3-20).…”

Section: Non-radioactive Simulant Testingmentioning

confidence: 99%

“…Specifically, mercury, nickel, and manganese have not been effectively removed during SRS tank cleaning operations. 11 If removal of these secondary phases is needed to support tank closure efforts, then methods need to be developed to solubilize these phases. In addition, understanding the behavior of these metals in oxalic acid-based cleaning reagents is important in evaluating the effectiveness of chemical cleaning campaigns and in optimizing cleaning methods.…”

Section: Introductionmentioning

confidence: 99%

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Alternative Chemical Cleaning Methods for High Level Waste Tanks: Simulant Studies

Rudisill

King

Hay

et al. 2015

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We gratefully acknowledge the assistance of Holly Hall in the movement of equipment, supplies, samples, and chemicals between laboratories during testing. The efforts of Whitney Riley in analyzing most of the non-radioactive test samples are appreciated. SRNL-STI-2015-00517 Revision 0 vi SRNL-STI-2015-00517 Revision 0 vii oxalic/nitric acid reagent. Following treatment using the baseline oxalic acid reagent, detectable levels of actinide removal were achieved using the acidic permanganate cleaning method. Based on the results observed with non-radioactive and radioactive simulants, actual waste testing of both alternative cleaning technologies (optimized oxalic acid cleaning using supplementary nitric acid and permanganate-based cleaning under both acidic and basic conditions) is recommended.

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Section: Non-radioactive Simulant Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%