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Title: Investigation on the co-precipitation of transuranium elements from alkaline solutions by the method of appearing reagents

Abstract

Highly alkaline radioactive waste solutions originating from production of plutonium for military purposes are stored in underground tanks at the U.S. Department of Energy Hanford Site. The purification of alkaline solutions from neptunium and plutonium is important in the treatment and disposal of these wastes. This report describes scoping tests with sodium hydroxide solutions, where precipitation techniques were investigated to perform the separation. Hydroxides of iron (III), manganese (II), cobalt (II, III), and chromium (III); manganese (IV) oxide, and sodium uranate were investigated as carriers. The report describes the optimum conditions that were identified to precipitate these carriers homogeneously throughout the solution by reductive, hydrolytic, or catalytic decomposition of alkali-soluble precursor compounds by a technique called the Method of Appearing Reagents. The coprecipitation of pentavalent and hexavalent neptunium and plutonium was investigated for the candidate agents under optimum conditions and is described in this report along with the following results. Plutonium coprecipitated well with all tested materials except manganese (IV) oxide. Neptunium only coprecipitated well with uranate. The report presents a hypothesis to explain these behaviors. Further tests with more complex solution matrices must be performed.

Authors:
; ; ; ; ; ;  [1]
  1. Russian Academy of Science (Russian Federation). Inst. of Physical Chemistry
Publication Date:
Research Org.:
Fluor Daniel Hanford, Inc., Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
OSTI Identifier:
353259
Report Number(s):
WHC-EP-0898
ON: DE98054297; BR: EW3134030; TRN: AHC29923%%91
DOE Contract Number:  
AC06-96RL13200
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 6 Jun 1996
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; NEPTUNIUM; PLUTONIUM; COPRECIPITATION; SODIUM HYDROXIDES; PERFORMANCE TESTING; REAGENTS; RADIOACTIVE WASTE STORAGE; REMEDIAL ACTION; RADIOACTIVE WASTE PROCESSING

Citation Formats

Krot, N, Shilov, V, Bessonov, A, Budantseva, N, Charushnikova, I, Perminov, V, and Astafurova, L. Investigation on the co-precipitation of transuranium elements from alkaline solutions by the method of appearing reagents. United States: N. p., 1996. Web. doi:10.2172/353259.
Krot, N, Shilov, V, Bessonov, A, Budantseva, N, Charushnikova, I, Perminov, V, & Astafurova, L. Investigation on the co-precipitation of transuranium elements from alkaline solutions by the method of appearing reagents. United States. https://doi.org/10.2172/353259
Krot, N, Shilov, V, Bessonov, A, Budantseva, N, Charushnikova, I, Perminov, V, and Astafurova, L. 1996. "Investigation on the co-precipitation of transuranium elements from alkaline solutions by the method of appearing reagents". United States. https://doi.org/10.2172/353259. https://www.osti.gov/servlets/purl/353259.
@article{osti_353259,
title = {Investigation on the co-precipitation of transuranium elements from alkaline solutions by the method of appearing reagents},
author = {Krot, N and Shilov, V and Bessonov, A and Budantseva, N and Charushnikova, I and Perminov, V and Astafurova, L},
abstractNote = {Highly alkaline radioactive waste solutions originating from production of plutonium for military purposes are stored in underground tanks at the U.S. Department of Energy Hanford Site. The purification of alkaline solutions from neptunium and plutonium is important in the treatment and disposal of these wastes. This report describes scoping tests with sodium hydroxide solutions, where precipitation techniques were investigated to perform the separation. Hydroxides of iron (III), manganese (II), cobalt (II, III), and chromium (III); manganese (IV) oxide, and sodium uranate were investigated as carriers. The report describes the optimum conditions that were identified to precipitate these carriers homogeneously throughout the solution by reductive, hydrolytic, or catalytic decomposition of alkali-soluble precursor compounds by a technique called the Method of Appearing Reagents. The coprecipitation of pentavalent and hexavalent neptunium and plutonium was investigated for the candidate agents under optimum conditions and is described in this report along with the following results. Plutonium coprecipitated well with all tested materials except manganese (IV) oxide. Neptunium only coprecipitated well with uranate. The report presents a hypothesis to explain these behaviors. Further tests with more complex solution matrices must be performed.},
doi = {10.2172/353259},
url = {https://www.osti.gov/biblio/353259}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jun 06 00:00:00 EDT 1996},
month = {Thu Jun 06 00:00:00 EDT 1996}
}