Retention of neptunium in uranyl alteration phases formed during spent fuel corrosion

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Uranyl oxide hydrate phases are known to form during contact of oxide spent nuclear fuel with water under oxidizing conditions; however, less is known about the fate of fission and neutron capture products during this alteration. We describe, the first time, evidence that neptunium can become incorporated into the uranyl secondary phase, dehydrated schoepite (UO{sub 3}{lg_bullet}0.8H{sub 2}O). Based on the long-term durability of natural schoepite, the retention of neptunium in this alteration phase may be significant during spent fuel corrosion in an unsaturated geologic repository.

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9 p.

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Buck, E.C.; Finch, R.J.; Finn, P.A. & Bates, J.K. October 1, 1997.

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Uranyl oxide hydrate phases are known to form during contact of oxide spent nuclear fuel with water under oxidizing conditions; however, less is known about the fate of fission and neutron capture products during this alteration. We describe, the first time, evidence that neptunium can become incorporated into the uranyl secondary phase, dehydrated schoepite (UO{sub 3}{lg_bullet}0.8H{sub 2}O). Based on the long-term durability of natural schoepite, the retention of neptunium in this alteration phase may be significant during spent fuel corrosion in an unsaturated geologic repository.

Physical Description

9 p.

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INIS; OSTI as DE97054176

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  • 21. symposium on the scientific basis for nuclear waste management, Davos (Switzerland), 28 Sep - 3 Oct 1997

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  • Other: DE97054176
  • Report No.: ANL/CMT/CP--93028
  • Report No.: CONF-970902--
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 561225
  • Archival Resource Key: ark:/67531/metadc697626

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 18, 2016, 6:26 p.m.

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Buck, E.C.; Finch, R.J.; Finn, P.A. & Bates, J.K. Retention of neptunium in uranyl alteration phases formed during spent fuel corrosion, article, October 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc697626/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.