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Title: 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}
}