Cesium Exchange onto Crystalline Silicotitanate from Blended Hanford Tank Wastes

Technical Report · Fri Oct 01 04:00:00 EDT 2021

DOI:https://doi.org/10.2172/1829482· OSTI ID:1829482

Fiskum, Sandra K. ^[1]; Campbell, Emily L. ^[1]; Peterson, Reid A. ^[1]; Trang-Le, Truc L. T. ^[1]

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1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

The Tank Side Cesium Removal (TSCR) system was developed to filter and remove cesium (Cs and ¹³⁷Cs) from Hanford tank waste supernate in preparation for vitrification. The Cs removal will be conducted with crystalline silicotitanate (CST) ion exchange media. Under the planned waste-processing strategy, the tank waste supernate will be queued for TSCR processing in tank 241-AP-107 (AP-107). Once AP-107 tank waste volume is sufficiently depleted, the waste supernate from tank 241-AP-105 (AP-105, the holding tank before transfer to AP-107) will be transferred to tank AP-107. Supernate from another tank will be transferred to the holding tank, AP-105, for eventual transfer to tank AP-107. These supernate streams will undergo blending in tanks AP-107 and AP-105; the volume blend ratios will be driven by how much the tank waste supernate volumes are depleted before the next tank waste is added. The consequence of tank waste blending on Cs uptake by CST was of interest and was tested via batch contacts; results are reported herein.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1829482
• Report Number(s): PNNL-31951
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE