Thermal and Chemical Stability of Crystalline Silicotitanate Sorbent

Technical Report · Fri Oct 01 04:00:00 EDT 1999

DOI:https://doi.org/10.2172/750983· OSTI ID:750983

Taylor, P A ^[1]; Mattus, C H

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1. ORNL

The Savannah River Site (SRS) is evaluating technologies for removing cesium-137 (137Cs) from the supemate solutions stored in the high-level waste tanks at the site. Crystalline silicotitanate sorbent (IONSIV IE-9 1 lo, UOP Molecular Sieves; Mount Laurel, NJ) is very effective for removing cesium from high-salt solution, such as the SRS supemates, and is currently being used at Oak Ridge National Laboratory to remove radioactive cesium from similar solutions, Because of the extremely high loading of 137Cs that would be expected for the large columns of crystalline silicotitanate (CST) that would be used for treating the SRS supemate, any loss of flow or cooling to the columns could result in high temperatures within the column from radiolytic heating. The ability of CST to retain previously loaded cesium while in contact with SRS tank supemates at various temperatures was determined by performing bench scale simulant tests using CST samples that were loaded with stable cesium and radi oactive cesium tracer. These results were compared with those obtained from loading tests at the same temperatures.

• Research Organization: Oak Ridge National Lab., TN (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 750983
• Report Number(s): ORNL/TM-1999/233
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CESIUM 137
ION EXCHANGE MATERIALS
MOLECULAR SIEVES
RADIOACTIVE WASTE PROCESSING
SAVANNAH RIVER PLANT
STABILITY
TANKS