Fabrication of granule and pellet heat sources from oxalate-based $sup 238$PuO$sub 2$

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Suitable fuel forms for radioisotopic thermoelectric generators are granules of high internal density (greater than 95 percent of theoretical) or geometric shapes (80 to 90 percent dense) such as pellets or spheres. Both forms can be made from calcined $sup 238$Pu(III) oxalate. The conditions for processing PuO$sub 2$ are controlled during fuel form fabrication to ensure pellet integrity; to control density, grain size, and porosity distribution; and to minimize the fraction of potentially respirable fines. The competing phenomena of expansion caused by radiation damage (including helium generation from radioactive decay of plutonium) and shrinkage caused by sintering must be controlled ... continued below

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Pages: 38

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Bickford, D.F. & Rankin, D.T. January 1, 1975.

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

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Suitable fuel forms for radioisotopic thermoelectric generators are granules of high internal density (greater than 95 percent of theoretical) or geometric shapes (80 to 90 percent dense) such as pellets or spheres. Both forms can be made from calcined $sup 238$Pu(III) oxalate. The conditions for processing PuO$sub 2$ are controlled during fuel form fabrication to ensure pellet integrity; to control density, grain size, and porosity distribution; and to minimize the fraction of potentially respirable fines. The competing phenomena of expansion caused by radiation damage (including helium generation from radioactive decay of plutonium) and shrinkage caused by sintering must be controlled to assure dimensional stability. The variation of microstructure and related physical properties with process parameters is discussed. (auth)

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Pages: 38

Notes

Dep. NTIS

Source

  • American Ceramic Society, Seattle, Washington, USA, 29 Oct 1975

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  • Report No.: DP-MS--75-63
  • Report No.: CONF-751038--2
  • Grant Number: AT(07-2)-1
  • Office of Scientific & Technical Information Report Number: 4169593
  • Archival Resource Key: ark:/67531/metadc864872

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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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  • January 1, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Feb. 17, 2017, 3:04 p.m.

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Bickford, D.F. & Rankin, D.T. Fabrication of granule and pellet heat sources from oxalate-based $sup 238$PuO$sub 2$, article, January 1, 1975; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc864872/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.