Interim results: development of a head-end process for recovering uranium and thorium from crushed Fort St. Vrain fuel

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Development of processes and equipment for recovering uranium and thorium from crushed Ft. St. Vrain fuel is described. Primary burning, particle classification, particle breaking, secondary burning, and aqueous processing were studied. Interim pilot-plant results show that: (1) graphite can be burned at the plant equivalent rate of 35 kgC/hr-ft$sup 2$ in the primary burner and that fines can be consumed by recycle to the primary burner; (2) separation to greater than 95 percent pure fissile and 85 percent pure fertile particles can be effected by a gas classifier; (3) gas jets are capable of breaking silicon carbide coatings at rates ... continued below

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Pages: 107

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Hogg, G.W.; Rindfleisch, J.A.; Palmer, W.B.; Anderson, D.L. & Vavruska, J.S. October 1, 1975.

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Description

Development of processes and equipment for recovering uranium and thorium from crushed Ft. St. Vrain fuel is described. Primary burning, particle classification, particle breaking, secondary burning, and aqueous processing were studied. Interim pilot-plant results show that: (1) graphite can be burned at the plant equivalent rate of 35 kgC/hr-ft$sup 2$ in the primary burner and that fines can be consumed by recycle to the primary burner; (2) separation to greater than 95 percent pure fissile and 85 percent pure fertile particles can be effected by a gas classifier; (3) gas jets are capable of breaking silicon carbide coatings at rates compatible with plant requirements; gas utilization efficiencies are sufficiently great that off-gas generated by the jets is less than 5 percent of the off-gas generated by the process equipment; (4) an artificial inert bed is not required for secondary burning and the carbon content of the bed can easily be reduced to less than 2 percent in the secondary burner; (5) corrosion rates of thorex solution on 304 L stainless steel are sufficiently low to allow the dissolver to be constructed of 304 L stainless steel; and, (6) solids--liquid separation efficiencies using a continuous solid-bowl centrifuge are sufficiently high to process the dissolver product in a pulse-column extractor. Basic data on the process materials and conditions germane to the safety analysis for the process are also given. (JGB)

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Pages: 107

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  • Other Information: Orig. Receipt Date: 30-JUN-76

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  • Report No.: ICP--1074
  • Grant Number: E(10-1)-1375
  • DOI: 10.2172/4127951 | External Link
  • Office of Scientific & Technical Information Report Number: 4127951
  • Archival Resource Key: ark:/67531/metadc872507

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  • October 1, 1975

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  • Sept. 16, 2016, 12:32 a.m.

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  • Nov. 29, 2016, 4:10 p.m.

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Hogg, G.W.; Rindfleisch, J.A.; Palmer, W.B.; Anderson, D.L. & Vavruska, J.S. Interim results: development of a head-end process for recovering uranium and thorium from crushed Fort St. Vrain fuel, report, October 1, 1975; United States. (digital.library.unt.edu/ark:/67531/metadc872507/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.