Final Report of Tank 241-C-105 Dissolution, the Phase 2 Study
- Washington River Protection Solutions LLC., Richland, WA (United States)
Three clamshell grab samples were taken from Tank 241-C-105 in October 2015 in accordance with RPP-PLAN-60011. Analytical results of those samples were issued in the report RPP-RPT-59115 by Wastren Advantage, Inc., Hanford Laboratory. Solid phase characterization results were reported separately in LAB-RPT-15-00011 and in RPP-RPT-59147. The major solid phases reported to be present were dawsonite [NaAlCO3(OH)2], trona [Na3(HCO3)(CO3)·2H2O], cejkaite [Na4(UO2)(CO3)3], and an unidentified organic solid, with minor amounts of gibbsite [Al(OH)3], natrophosphate [Na7F(PO4)2·19H2O], and traces of unidentified iron-rich and manganese-rich phases. Note that the presence of dawsonite, trona, and cejkaite requires a relatively low pH, likely around pH 9 to 10. One aliquot of each grab sample was provided to 222-S Laboratory Process Chemistry for dissolution studies. Phase 1 of the dissolution testing followed the approved test plan, WRPS-1404813, Rev. 3, and examined the behavior of the Tank 241-C-105 solids treated with water, 19M sodium hydroxide, 2M nitric acid, and 0.5M oxalic acid/2M nitric acid. Phase 2 of the testing was conducted in accordance with instructions from the client and emphasized treatment with 19M sodium hydroxide followed by water washing. This is the report of the Phase 2 testing.
- Research Organization:
- Hanford Site (HNF), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM)
- DOE Contract Number:
- AC27-08RV14800
- OSTI ID:
- 1338967
- Report Number(s):
- RPP-RPT-59700 Rev. 0; TRN: US1701466
- Country of Publication:
- United States
- Language:
- English
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