Testing of CoTreat Inorganic Ion Exchange Media for the Removal of 60Co from Thorp Pond Water

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CoTreat, a new inorganic ion exchange media, has been studied in the laboratory to support its application as a pre- coat to existing Funda filters in THORP feed pond plant (Sellafield, UK). This is a novel way of application of CoTreat, which is usually utilized in fixed-bed ion exchange columns in a granular form. The results present the effect of operating conditions (CoTreat dose, pond water chemistry) on CoTreat performance for the removal of Co-57 tracer from simulated pond water. Major findings include the strong dependence of Co-57 decontamination factor (DF) on feed activity. At the 200 Bq/L feed level, ... continued below

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7 pages

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Harjula, R.; Paajanen, A.; Lehto, J.; Tusa, E. & Strandring, P. February 25, 2003.

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Description

CoTreat, a new inorganic ion exchange media, has been studied in the laboratory to support its application as a pre- coat to existing Funda filters in THORP feed pond plant (Sellafield, UK). This is a novel way of application of CoTreat, which is usually utilized in fixed-bed ion exchange columns in a granular form. The results present the effect of operating conditions (CoTreat dose, pond water chemistry) on CoTreat performance for the removal of Co-57 tracer from simulated pond water. Major findings include the strong dependence of Co-57 decontamination factor (DF) on feed activity. At the 200 Bq/L feed level, the observed DF was 10-20 but rose to 1000 and above when the feed level was increased to 20000 Bq/L. Calcium present in the feed was found to decrease the DF at concentrations higher than 1 ppm. The laboratory studies showed significantly higher DF's than what has been observed in large-scale THORP tests. This discrepancy is likely to be due to the technique used in applying the Co Treat layer to the Thorp HEFP Funda filter. Options for improving Co Treat performance (i.e. application technique) under Funda filter operating conditions are being investigated by BNFL based on this laboratory work.

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7 pages

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  • Waste Management 2003 Symposium, Tucson, AZ (US), 02/23/2003--02/27/2003

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  • Report No.: NONE
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 825981
  • Archival Resource Key: ark:/67531/metadc779049

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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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  • February 25, 2003

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  • Dec. 3, 2015, 9:30 a.m.

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  • Jan. 22, 2016, 5:40 p.m.

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Harjula, R.; Paajanen, A.; Lehto, J.; Tusa, E. & Strandring, P. Testing of CoTreat Inorganic Ion Exchange Media for the Removal of 60Co from Thorp Pond Water, article, February 25, 2003; (digital.library.unt.edu/ark:/67531/metadc779049/: accessed January 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.