Eichrom Resin Columns: A New breakthrough - PowerPoint PPT Presentation

1 / 17
About This Presentation
Title:

Eichrom Resin Columns: A New breakthrough

Description:

Investigations on frits led to the understanding of different frit types: ... New frit inventory for future production has been ordered ... – PowerPoint PPT presentation

Number of Views:161
Avg rating:3.0/5.0
Slides: 18
Provided by: atha8
Category:

less

Transcript and Presenter's Notes

Title: Eichrom Resin Columns: A New breakthrough


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 of
    time

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
Write a Comment
User Comments (0)
About PowerShow.com