Hanford Sr/TRU Decontamination Program: Research from Beaker to Pilot Scale
Plutonium and americium are present in the Hanford High Level Liquid Waste complexant concentrate (CC) waste due to the presence of complexing agents including di-(2-ethylhexyl) phosphoric acid (D2EHPA), tributylphosphate (TBP), hydroxyethylene diamine triacetic acid (HEDTA), ethylene diamine tetraacetic acid (EDTA), citric acid, glycolic acid, and sodium gluconate. The transuranic (TRU) concentrations approach 600 nCi/g and require processing prior to encapsulation into low activity glass. The Savannah River Technology Center (SRTC) has been actively participating in the development of a strontium/TRU decontamination process for the CC waste stored at Hanford in Tanks AN-107 and AN-102. The current baseline flowsheet involves the addition of strontium nitrate to effectively remove radio-strontium through an isotopic dilution, followed by a sodium permanganate strike to co-precipitate the actinides in the in-situ produced manganese solid phases. Demonstration efforts to validate the Sr/TRU flowsheet have included beaker scale reagent optimization and reaction kinetics testing and engineering scale-up experiments at the multi-liter and 1/100th plant scale (200-gallon) using both simulated and actual waste samples. Several key process engineering and process chemistry needs were identified during a recent Hanford Waste Treatment Plant project risk review.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC09-96SR18500
- OSTI ID:
- 808208
- Report Number(s):
- WSRC-MS-2003-00110; TRN: US0301973
- Resource Relation:
- Conference: Plutonium Futures - The Science Conference, Albuquerque, NM (US), 07/06/2003--07/10/2003; Other Information: PBD: 18 Feb 2003
- Country of Publication:
- United States
- Language:
- English
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