Treatment options for low-level radiologically contaminated ORNL filtercake

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Description

Water softening sludge (>4000 stored low level contaminated drums; 600 drums per year) generated by the ORNL Process Waste Treatment Plant must be treated, stabilized, and placed in safe storage/disposal. The sludge is primarily CaCO{sub 3} and is contaminated by low levels of {sup 90}Sr and {sup 137}Cs. In this study, microwave sintering and calcination were evaluated for treating the sludge. The microwave melting experiments showed promise: volume reductions were significant (3-5X), and the waste form was durable with glass additives (LiOH, fly ash). A commercial vendor using surrogate has demonstrated a melt mineralization process that yields a dense monolithic ... continued below

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66 p.

Creation Information

Lee, Hom-Ti & Bostick, W.D. April 1, 1996.

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  • Lee, Hom-Ti Oak Ridge Associated Universities, Inc., TN (United States)
  • Bostick, W.D. Oak Ridge K-25 Site, TN (United States)

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Description

Water softening sludge (>4000 stored low level contaminated drums; 600 drums per year) generated by the ORNL Process Waste Treatment Plant must be treated, stabilized, and placed in safe storage/disposal. The sludge is primarily CaCO{sub 3} and is contaminated by low levels of {sup 90}Sr and {sup 137}Cs. In this study, microwave sintering and calcination were evaluated for treating the sludge. The microwave melting experiments showed promise: volume reductions were significant (3-5X), and the waste form was durable with glass additives (LiOH, fly ash). A commercial vendor using surrogate has demonstrated a melt mineralization process that yields a dense monolithic waste form with a volume reduction factor (VR) of 7.7. Calcination of the sludge at 850-900 C yielded a VR of 2.5. Compaction at 4500 psi increased the VR to 4.2, but the compressed form is not dimensionally stable. Addition of paraffin helped consolidate fines and yielded a VR of 3.5. In conclusion, microwave melting or another form of vitrification is likely to be the best method; however for immediate implementation, the calculation/compaction/waxing process is viable.

Physical Description

66 p.

Notes

INIS; OSTI as DE96009970

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  • Other Information: PBD: Apr 1996

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  • Other: DE96009970
  • Report No.: K/TSO--7
  • Grant Number: AC05-84OT21400
  • DOI: 10.2172/220583 | External Link
  • Office of Scientific & Technical Information Report Number: 220583
  • Archival Resource Key: ark:/67531/metadc671669

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

Description Last Updated

  • Dec. 4, 2015, 1:51 p.m.

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Lee, Hom-Ti & Bostick, W.D. Treatment options for low-level radiologically contaminated ORNL filtercake, report, April 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc671669/: accessed January 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.