An assessment of the validity of cerium oxide as a surrogate for plutonium oxide gallium removal studies

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Description

Methods for purifying plutonium metal have long been established. These methods use acid solutions to dissolve and concentrate the metal. However, these methods can produce significant mixed waste, that is, waste containing both radioactive and chemical hazards. The volume of waste produced from the aqueous purification of thousands of weapons would be expensive to treat and dispose. Therefore, a dry method of purification is highly desirable. Recently, a dry gallium removal research program commenced. Based on initial calculations, it appeared that a particular form of gallium (gallium suboxide, Ga{sub 2}O) could be evaporated from plutonium oxide in the presence of ... continued below

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21 p.

Creation Information

Kolman, D.G.; Park, Y.; Stan, M.; Hanrahan, R.J. Jr. & Butt, D.P. March 1, 1999.

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Description

Methods for purifying plutonium metal have long been established. These methods use acid solutions to dissolve and concentrate the metal. However, these methods can produce significant mixed waste, that is, waste containing both radioactive and chemical hazards. The volume of waste produced from the aqueous purification of thousands of weapons would be expensive to treat and dispose. Therefore, a dry method of purification is highly desirable. Recently, a dry gallium removal research program commenced. Based on initial calculations, it appeared that a particular form of gallium (gallium suboxide, Ga{sub 2}O) could be evaporated from plutonium oxide in the presence of a reducing agent, such as small amounts of hydrogen dry gas within an inert environment. Initial tests using ceria-based material (as a surrogate for PuO{sub 2}) showed that thermally-induced gallium removal (TIGR) from small samples (on the order of one gram) was indeed viable. Because of the expense and difficulty of optimizing TIGR from plutonium dioxide, TIGR optimization tests using ceria have continued. This document details the relationship between the ceria surrogate tests and those conducted using plutonia.

Physical Description

21 p.

Notes

INIS; OSTI as DE99002046

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  • Other Information: PBD: [1999]

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  • Other: DE99002046
  • Report No.: LA-UR--99-491
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/329498 | External Link
  • Office of Scientific & Technical Information Report Number: 329498
  • Archival Resource Key: ark:/67531/metadc685080

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  • March 1, 1999

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • March 1, 2016, 2:32 p.m.

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Kolman, D.G.; Park, Y.; Stan, M.; Hanrahan, R.J. Jr. & Butt, D.P. An assessment of the validity of cerium oxide as a surrogate for plutonium oxide gallium removal studies, report, March 1, 1999; New Mexico. (digital.library.unt.edu/ark:/67531/metadc685080/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.