Comparison of Sludge Digestion Methods for High Organic Hanford Tank 241-C-204

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This report presents the results of an investigation into methods for digesting sludge in tank 241-C-204 at the Hanford Site in south-central Washington State. The objective of this study was to compare the recovery of uranium, neptunium, and plutonium using three digestion methods: EPA Method 3052, EPA Method 3050B, and alkaline fusion. Results show that EPA Method 3052, microwave assisted acid digestion, is the most efficient digestion method with higher recoveries for both uranium and plutonium. This may also be the case for neptunium; however, the analytical results are uncertain for this element. The microwave digestion method also has the ... continued below

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Lindberg, Michael J. & Deutsch, William J. December 1, 2006.

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This report presents the results of an investigation into methods for digesting sludge in tank 241-C-204 at the Hanford Site in south-central Washington State. The objective of this study was to compare the recovery of uranium, neptunium, and plutonium using three digestion methods: EPA Method 3052, EPA Method 3050B, and alkaline fusion. Results show that EPA Method 3052, microwave assisted acid digestion, is the most efficient digestion method with higher recoveries for both uranium and plutonium. This may also be the case for neptunium; however, the analytical results are uncertain for this element. The microwave digestion method also has the added benefits of being quicker and producing less waste, which lowers the overall cost per sample. Further testing with samples from other tanks will confirm that microwave assisted digestion is a viable method of digesting Hanford tank sludges (including those with a high organic content) for chemical analysis.

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  • Report No.: PNNL-16140
  • Grant Number: AC05-76RL01830
  • DOI: 10.2172/901476 | External Link
  • Office of Scientific & Technical Information Report Number: 901476
  • Archival Resource Key: ark:/67531/metadc887037

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Office of Scientific & Technical Information Technical Reports

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  • December 1, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 6, 2016, 7:49 p.m.

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Lindberg, Michael J. & Deutsch, William J. Comparison of Sludge Digestion Methods for High Organic Hanford Tank 241-C-204, report, December 1, 2006; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc887037/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.