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Title: Plutonium dissolution process

A two-step process for dissolving plutonium metal, which two steps can be carried out sequentially or simultaneously. Plutonium metal is exposed to a first mixture containing approximately 1.0M-1.67M sulfamic acid and 0.0025M-0.1M fluoride, the mixture having been heated to a temperature between 45.degree. C. and 70.degree. C. The mixture will dissolve a first portion of the plutonium metal but leave a portion of the plutonium in an oxide residue. Then, a mineral acid and additional fluoride are added to dissolve the residue. Alteratively, nitric acid in a concentration between approximately 0.05M and 0.067M is added to the first mixture to dissolve the residue as it is produced. Hydrogen released during the dissolution process is diluted with nitrogen.
Inventors:
 [1];  [2];  [2];  [2];  [3]
  1. (Oak Park, IL)
  2. (Aiken, SC)
  3. (North Augusta, SC)
Issue Date:
OSTI Identifier:
870242
Assignee:
United States of America as represented by United States (Washington, DC) SRS
Patent Number(s):
US 5482688
Contract Number:
AC09-89SR18035
Research Org:
WESTINGHOUSE SAVANNAH RIVER CO
Country of Publication:
United States
Language:
English
Subject:
plutonium; dissolution; process; two-step; dissolving; metal; steps; carried; sequentially; simultaneously; exposed; mixture; containing; approximately; 0m-1; 67m; sulfamic; acid; 0025m-0; 1m; fluoride; heated; temperature; 45; degree; 70; dissolve; portion; leave; oxide; residue; mineral; additional; added; alteratively; nitric; concentration; 05m; 067m; produced; hydrogen; released; diluted; nitrogen; mineral acid; sulfamic acid; dissolution process; dissolving plutonium; mixture containing; nitric acid; plutonium metal; two-step process; step process; solution process; containing approximately; /423/

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