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Title: Method for dissolving delta-phase plutonium

Abstract

A process for dissolving plutonium, and in particular, delta-phase plutonium. The process includes heating a mixture of nitric acid, hydroxylammonium nitrate (HAN) and potassium fluoride to a temperature between 40.degree. and 70.degree. C., then immersing the metal in the mixture. Preferably, the nitric acid has a concentration of not more than 2M, the HAN approximately 0.66M, and the potassium fluoride 0.1M. Additionally, a small amount of sulfamic acid, such as 0.1M can be added to assure stability of the HAN in the presence of nitric acid. The oxide layer that forms on plutonium metal may be removed with a non-oxidizing acid as a pre-treatment step.

Inventors:
 [1]
  1. 1600 Sherwood Pl., SE., Aiken, SC 29801
Issue Date:
Research Org.:
WESTINGHOUSE SAVANNAH RIVER CO
OSTI Identifier:
868418
Patent Number(s):
5135728
Assignee:
Karraker, David G. (1600 Sherwood Pl., SE., Aiken, SC 29801)
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; dissolving; delta-phase; plutonium; process; particular; heating; mixture; nitric; acid; hydroxylammonium; nitrate; potassium; fluoride; temperature; 40; degree; 70; immersing; metal; preferably; concentration; 2m; approximately; 66m; 1m; additionally; amount; sulfamic; added; assure; stability; presence; oxide; layer; forms; removed; non-oxidizing; pre-treatment; step; sulfamic acid; dissolving plutonium; treatment step; ammonium nitrate; nitric acid; oxide layer; plutonium metal; oxidizing acid; hydroxylammonium nitrate; delta-phase plutonium; /423/

Citation Formats

Karraker, David G. Method for dissolving delta-phase plutonium. United States: N. p., 1992. Web.
Karraker, David G. Method for dissolving delta-phase plutonium. United States.
Karraker, David G. Wed . "Method for dissolving delta-phase plutonium". United States. https://www.osti.gov/servlets/purl/868418.
@article{osti_868418,
title = {Method for dissolving delta-phase plutonium},
author = {Karraker, David G},
abstractNote = {A process for dissolving plutonium, and in particular, delta-phase plutonium. The process includes heating a mixture of nitric acid, hydroxylammonium nitrate (HAN) and potassium fluoride to a temperature between 40.degree. and 70.degree. C., then immersing the metal in the mixture. Preferably, the nitric acid has a concentration of not more than 2M, the HAN approximately 0.66M, and the potassium fluoride 0.1M. Additionally, a small amount of sulfamic acid, such as 0.1M can be added to assure stability of the HAN in the presence of nitric acid. The oxide layer that forms on plutonium metal may be removed with a non-oxidizing acid as a pre-treatment step.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Patent:

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