Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste
Large volumes of high-level waste (HLW) currently stored in tanks at DOE sites contain both sludges and supernatants. The sludges are composed of insoluble precipitates of actinides, radioactive fission products, and nonradioactive components. The supernatants are alkaline carbonate solutions, which can contain soluble actinides, fission products, metal ions, and high concentrations of major electrolytes including sodium hydroxide, nitrate, nitrite, phosphate, carbonate, aluminate, sulfate, and organic complexants. The organic complexants include several compounds that can form strong aqueous complexes with actinide species and fission products including ethylenediaminetetraacetic acid (EDTA), N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA), iminodiacetic acid (IDA), citrate, glycolate, gluconate, and degradation products, formate and oxalate.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA
- Sponsoring Organization:
- USDOE - Office of Science (SC)
- OSTI ID:
- 893279
- Report Number(s):
- EMSP-90237-2005
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste
Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste
Chemical speciation of strontium, americium, and curium in high level waste: Predictive modeling of phase partitioning during tank processing. 1998 annual progress report
Technical Report
·
Thu Jun 01 00:00:00 EDT 2006
·
OSTI ID:895760
Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste
Technical Report
·
Tue Jun 01 00:00:00 EDT 2004
·
OSTI ID:839297
Chemical speciation of strontium, americium, and curium in high level waste: Predictive modeling of phase partitioning during tank processing. 1998 annual progress report
Technical Report
·
Mon Jun 01 00:00:00 EDT 1998
·
OSTI ID:12611