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Conference papers

Dissolution of phosphate matrices based on the thorium phosphate diphosphate

Abstract : Several authors have reported the use of phosphate matrices like apatites, monazites or NZP for the immobilization of actinides coming from an advanced reprocessing or for the final disposal of the excess plutonium from dismantled nuclear weapons. The thorium phosphate diphosphate Th4(PO4)4P2O7 (namely TPD) was also proposed for this purpose. Indeed, its structure allows the replacement of large amounts of tetravalent actinides like uranium, neptunium or plutonium leading to the obtention of solid solutions. The maximum weight loading was estimated to be equal to about 48% for uranium, 33% for neptunium and 26% for plutonium.
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Contributor : Suzanne Robert <>
Submitted on : Wednesday, March 12, 2003 - 4:13:05 PM
Last modification on : Wednesday, October 14, 2020 - 3:59:16 AM


  • HAL Id : in2p3-00012649, version 1



N. Dacheux, A.C. Thomas, V. Brandel, M. Genet. Dissolution of phosphate matrices based on the thorium phosphate diphosphate. Topical Conference on Plutonium and Actinides, Jul 2000, Santa Fe, United States. pp.216. ⟨in2p3-00012649⟩



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