Radionuclide Leaching from Residual Solids Remaining after Acid Dissolution of Composite K East Canister Sludge

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Laboratory tests were performed to examine mixed nitric/hydrofluoric acid leach treatments for decontaminating dissolver residual solids (KECDVSR24H-2) produced during a 20- to 24-hr dissolution of a composite K East (KE) Basin canister sludge in 95 C 6 M nitric acid (HNO{sub 3}). The scope of this testing has been described in Section 4.5 of ''Testing Strategy to Support the Development of K Basin Sludge Treatment Process'' (Flament 1998). Radionuclides sorbed or associated with the residual solids generated in the K Basin sludge treatment process can restrict disposal of this solid to the Environmental Restoration Disposal Facility (ERDF). The starting dissolver ... continued below

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18 p.

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Delegard, C.H.; Rinehart, D.E.; Soderquist, C.Z. & Fadeff, S.K. April 2, 1999.

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Description

Laboratory tests were performed to examine mixed nitric/hydrofluoric acid leach treatments for decontaminating dissolver residual solids (KECDVSR24H-2) produced during a 20- to 24-hr dissolution of a composite K East (KE) Basin canister sludge in 95 C 6 M nitric acid (HNO{sub 3}). The scope of this testing has been described in Section 4.5 of ''Testing Strategy to Support the Development of K Basin Sludge Treatment Process'' (Flament 1998). Radionuclides sorbed or associated with the residual solids generated in the K Basin sludge treatment process can restrict disposal of this solid to the Environmental Restoration Disposal Facility (ERDF). The starting dissolver residual solid for this testing, KECDVSR24H-2, contains radionuclides at concentrations which exceed the ERDF Waste Acceptance Criteria for TRU by about a factor of 70, for {sup 239}Pu by a factor of 200, and for {sup 241}Am by a factor of 50. The solids also exceed the ERDF criterion for {sup 137}Cs by a factor of 2 and uranium by a factor of 5. Therefore, the radionuclides of greatest interest in this leaching study are first {sup 239}Pu and {sup 241}Am (both components of TRU) and then uranium and {sup 137}Cs.

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18 p.

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INIS; OSTI as DE00005107

Medium: P; Size: 18 pages

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  • Other Information: PBD: 2 Apr 1999

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  • Report No.: PNNL-12106
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/5107 | External Link
  • Office of Scientific & Technical Information Report Number: 5107
  • Archival Resource Key: ark:/67531/metadc694191

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 2, 1999

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 7, 2017, 4:15 p.m.

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Delegard, C.H.; Rinehart, D.E.; Soderquist, C.Z. & Fadeff, S.K. Radionuclide Leaching from Residual Solids Remaining after Acid Dissolution of Composite K East Canister Sludge, report, April 2, 1999; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc694191/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.