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Title: Isolating /sup 241/Am from waste solutions containing Al, Ca, Fe, and Cr

Abstract

About 2.4 kg of /sup 241/Am contaminated with calcium and aluminum had been recovered from low-activity waste during recycle of 11% /sup 240/Pu. A process was developed and demonstrated to purify the americium before shipment as /sup 241/AmO/sub 2/. The americium and some of the calcium were batch extracted into 50% TBP-n-paraffin from 2.2M Al(NO/sub 3/)/sub 3/ - 0.3M HNO/sub 3/ solution in a canyon tank. Pregnant solvent was scrubbed first with 2.1M Al/sup 3 +/-0.3M Li/sup +/-6.7M NO/sub 3/- and then with 7M LiNO/sub 3/ to reduce the calcium content and to displace the aluminum. Americium was then stripped from the solvent with water and concentrated by evaporation. Before precipitating the americium with oxalic acid, the nitric acid was adjusted with NH/sub 4/OH to yield a 1M NH/sub 4/NO/sub 3/ solution. Recovery across the batch extraction step was 97.8%, while 93% of the calcium and >99% of the aluminum was rejected. Recovery across precipitation averaged >96% while producing a product which was >99.3% pure /sup 241/AmO/sub 2/. The major impurities were water, carbon, calcium, iron, and zinc.

Authors:
; ;
Publication Date:
Research Org.:
Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
OSTI Identifier:
5644483
Report Number(s):
DP-1581
ON: DE82009005; TRN: 82-010513
DOE Contract Number:  
AC09-76SR00001
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AMERICIUM; PRECIPITATION; AMERICIUM 241; SOLVENT EXTRACTION; AMERICIUM OXIDES; PURIFICATION; ALUMINIUM; ALUMINIUM NITRATES; AMMONIUM HYDROXIDES; CALCIUM; CARBON; EVAPORATION; EXPERIMENTAL DATA; IMPURITIES; IRON; LITHIUM NITRATES; NITRIC ACID; OXALIC ACID; PARAFFIN; PLUTONIUM 240; RECOVERY; REPROCESSING; SAVANNAH RIVER PLANT; TBP; ZINC; ACTINIDE COMPOUNDS; ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ACTINIDES; ALKALI METAL COMPOUNDS; ALKALINE EARTH METALS; ALKANES; ALPHA DECAY RADIOISOTOPES; ALUMINIUM COMPOUNDS; AMERICIUM COMPOUNDS; AMERICIUM ISOTOPES; AMMONIUM COMPOUNDS; BUTYL PHOSPHATES; CARBOXYLIC ACIDS; CHALCOGENIDES; DATA; DICARBOXYLIC ACIDS; ELEMENTS; ESTERS; EVEN-EVEN NUCLEI; EXTRACTION; HEAVY NUCLEI; HYDROCARBONS; HYDROGEN COMPOUNDS; HYDROXIDES; INFORMATION; INORGANIC ACIDS; ISOTOPES; LITHIUM COMPOUNDS; METALS; NATIONAL ORGANIZATIONS; NITRATES; NITROGEN COMPOUNDS; NONMETALS; NUCLEI; NUMERICAL DATA; ODD-EVEN NUCLEI; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHOSPHORIC ACID ESTERS; PLUTONIUM ISOTOPES; RADIOISOTOPES; SEPARATION PROCESSES; TRANSITION ELEMENTS; TRANSPLUTONIUM COMPOUNDS; TRANSPLUTONIUM ELEMENTS; TRANSURANIUM COMPOUNDS; TRANSURANIUM ELEMENTS; US AEC; US DOE; US ERDA; US ORGANIZATIONS; WAXES; YEARS LIVING RADIOISOTOPES; 050800* - Nuclear Fuels- Spent Fuels Reprocessing; 400105 - Separation Procedures

Citation Formats

Gray, L W, Burney, G A, and King, C M. Isolating /sup 241/Am from waste solutions containing Al, Ca, Fe, and Cr. United States: N. p., 1982. Web. doi:10.2172/5644483.
Gray, L W, Burney, G A, & King, C M. Isolating /sup 241/Am from waste solutions containing Al, Ca, Fe, and Cr. United States. https://doi.org/10.2172/5644483
Gray, L W, Burney, G A, and King, C M. Fri . "Isolating /sup 241/Am from waste solutions containing Al, Ca, Fe, and Cr". United States. https://doi.org/10.2172/5644483. https://www.osti.gov/servlets/purl/5644483.
@article{osti_5644483,
title = {Isolating /sup 241/Am from waste solutions containing Al, Ca, Fe, and Cr},
author = {Gray, L W and Burney, G A and King, C M},
abstractNote = {About 2.4 kg of /sup 241/Am contaminated with calcium and aluminum had been recovered from low-activity waste during recycle of 11% /sup 240/Pu. A process was developed and demonstrated to purify the americium before shipment as /sup 241/AmO/sub 2/. The americium and some of the calcium were batch extracted into 50% TBP-n-paraffin from 2.2M Al(NO/sub 3/)/sub 3/ - 0.3M HNO/sub 3/ solution in a canyon tank. Pregnant solvent was scrubbed first with 2.1M Al/sup 3 +/-0.3M Li/sup +/-6.7M NO/sub 3/- and then with 7M LiNO/sub 3/ to reduce the calcium content and to displace the aluminum. Americium was then stripped from the solvent with water and concentrated by evaporation. Before precipitating the americium with oxalic acid, the nitric acid was adjusted with NH/sub 4/OH to yield a 1M NH/sub 4/NO/sub 3/ solution. Recovery across the batch extraction step was 97.8%, while 93% of the calcium and >99% of the aluminum was rejected. Recovery across precipitation averaged >96% while producing a product which was >99.3% pure /sup 241/AmO/sub 2/. The major impurities were water, carbon, calcium, iron, and zinc.},
doi = {10.2172/5644483},
url = {https://www.osti.gov/biblio/5644483}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}