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Major Project Accomplishments
- Spent Ion Exchange Resins Project
DOE and CNEA collaborated on the Spent Ion Exchange Resins project, which evaluates
the potential use of vitrification as a method for treating spent resins. The JCCRM sponsored
four workshops in conjunction with this project, held at the Clemson Environmental Technologies
Laboratory in February and July 1999, at the Pacific Northwest National Laboratory in August
2000, and at the Savannah River Technology Center in May 2001. During the 1999 workshops,
cesium-doped resins from two Argentine
nuclear plants, Atucha and Embalse, were vitrified and off-gas and other operational data
were collected. Additional melter studies using Atucha and Embalse resins that had been
doped with inactive cesium, strontium, and cobalt were performed during the 2000 workshop.
The 2001 workshop was the final test in the DOE-CNEA collaboration on the investigation of
the potential use of vitrification as a method for treating spent resins from Argentina's
Atucha I and Embalse nuclear power plants. A final report detailing the combined results
for all four tests will be produced by the end of FY01.
- Molybdenum-99 (Mo-99) Project
DOE and CNEA collaborated on the Molybdenum-99 (Mo-99) project, which included an
evaluation of the use of the inorganic selective ion exchange material Crystalline
Silicotitanates (CST) to remove cesium from the Mo-99 waste stream. By reducing cesium
concentrations, the bulk of the Mo-99 waste stream can be disposed of as a low-level
waste. In 1997, analysis of CNEA’s Mo-99 waste streams indicated that CST could provide
the decontamination factors needed for low-level waste classification. From 1997-1999,
multiple options were evaluated combined with computer modeling of the application.
Future project activities include the evaluation of crown ethers and other absorbers to
remove cesium as well as strontium from the Mo-99 waste stream.