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Eichrom Resin Columns: A New breakthrough

Eichrom Resin Columns: A New breakthrough. Anil Thakkar Eichrom Users’ Group Workshop May 3, 2005 Oak Ridge, TN. Background details. Stripping issues of Th on TEVA prepacked columns reported by numerous customers

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Eichrom Resin Columns: A New breakthrough

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  1. Eichrom Resin Columns: A New breakthrough Anil Thakkar Eichrom Users’ Group Workshop May 3, 2005 Oak Ridge, TN

  2. Background details • Stripping issues of Th on TEVA prepacked columns reported by numerous customers • Investigated all the components of the prepacaked column to trouble shoot the problem: resin, column body, resin bead size, frits….

  3. Previously discussed investigations…. • Column frits identified as the main cause of the problem • Investigations on frits led to the understanding of different frit types: • Frits with ‘ionic surfactant’ • Impact Th elution from TEVA columns • Impact low level U elution on UTEVA columns • Frits with ‘no surfactant’ • Measured slow flow rates at gravity • Mechanical pressure required to start the flow • Measured inconsistent flow rates

  4. Additional issues reported • Poor elution of low level U on UTEVA columns reported • An inconsistent elution of Th on UTEVA columns has been observed

  5. Additional research continues… A ‘non-ionic surfactant’ frit material found and put to test

  6. TEVA Column: Performance Test • Columns packed with non-ionic frit material • Measured performance of columns over a period oftime

  7. TEVA Columns: % Th Yields

  8. TEVA Columns: % Pu Yields with 0.5M HCl* *INEEL procedure uses 0.5M HCl to elute Pu

  9. TEVA Columns: % Am Yields(Am/ Lanthanide Separation)

  10. TEVA Columns: % Tc-99 Yields

  11. UTEVA, TRU, Sr and Ln columns tested after 2 weeks of packing

  12. UTEVA Columns: % U & Th Yields *Th eluted with 5M HCl/0.05M oxalic acid

  13. TRU Columns: % Am & Pu Yields

  14. Sr Columns: % Sr Yields & Recoveries

  15. Ln Columns: % Ac-228 Yields

  16. Improvements & Summary • Non-ionic surfactant frits improve performance • Th elution on TEVA • Th elution on UTEVA • Pu elution on TEVA • No impact observed on the performance of the following products with non-ionic frits • Am & Pu on TRU resin • Tc-99, Am on TEVA resin • Sr elution on Sr resin • Ac elution on Ln resin

  17. Future resin column inventory • Preliminary evaluation of prepacked column products with the new frits (non-ionic surfactant) has been extremely satisfactory • New frit inventory for future production has been ordered • Current inventory has old frits (ionic surfactant) in the prepacked column products • Any users of TEVA resin and UTEVA resin prepacked columns may consider cartridges in the interim • Contact Eichrom for further assistance

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