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

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Description

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 ... continued below

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Pages: 29

Creation Information

Gray, L.W.; Burney, G.A. & King, C.M. January 1, 1982.

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  • Savannah River Laboratory
    Publisher Info: Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
    Place of Publication: Aiken, South Carolina

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Description

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.

Physical Description

Pages: 29

Notes

NTIS, PC A03/MF A01.

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  • Other: DE82009005
  • Report No.: DP-1581
  • Grant Number: AC09-76SR00001
  • DOI: 10.2172/5644483 | External Link
  • Office of Scientific & Technical Information Report Number: 5644483
  • Archival Resource Key: ark:/67531/metadc1093635

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 1982

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • May 10, 2018, 9:23 p.m.

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Gray, L.W.; Burney, G.A. & King, C.M. Isolating /sup 241/Am from waste solutions containing Al, Ca, Fe, and Cr, report, January 1, 1982; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc1093635/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.