Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste
Abstract
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.
- Authors:
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 893279
- Report Number(s):
- EMSP-90237-2005
R&D Project: EMSP 90237; TRN: US0605971
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; ACTINIDES; AMERICIUM; CARBONATES; CURIUM; EDTA; ELECTROLYTES; FISSION PRODUCTS; FORMATES; HEDTA; NTA; SLUDGES; SODIUM HYDROXIDES; TANKS; WASTES
Citation Formats
Felmy, Andrew R. Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste. United States: N. p., 2005.
Web. doi:10.2172/893279.
Felmy, Andrew R. Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste. United States. https://doi.org/10.2172/893279
Felmy, Andrew R. 2005.
"Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste". United States. https://doi.org/10.2172/893279. https://www.osti.gov/servlets/purl/893279.
@article{osti_893279,
title = {Chemical Speciation of Americium, Curium and Selected Tetravalent Actinides in High Level Waste},
author = {Felmy, Andrew R},
abstractNote = {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.},
doi = {10.2172/893279},
url = {https://www.osti.gov/biblio/893279},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jun 01 00:00:00 EDT 2005},
month = {Wed Jun 01 00:00:00 EDT 2005}
}