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Your search keyword '"Mesbah, Adel"' showing total 11 results
Start Over Author "Mesbah, Adel" Journal journal of nuclear materials
11 results on '"Mesbah, Adel"'

6. Direct synthesis of pure brannerite UTi2O6

Author

Mesbah, Adel, primary, Szenknect, Stéphanie, additional, Clavier, Nicolas, additional, Lin, Hantao, additional, Baron, Fabien, additional, Beaufort, Daniel, additional, Batonneau, Yann, additional, Mercadier, Julien, additional, Eglinger, Aurélien, additional, Turuani, Marion, additional, Goncalves, Philippe, additional, Choulet, Flavien, additional, Chapon, Virginie, additional, Seydoux-Guillaume, Anne-Magali, additional, Pagel, Maurice, additional, and Dacheux, Nicolas, additional

Published
2019
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11. Incorporation of thorium in the rhabdophane structure: Synthesis and characterization of Pr1-2xCaxThxPO4·nH2O solid solutions.

Author

Qin, Danwen, Mesbah, Adel, Gausse, Clémence, Szenknect, Stéphanie, Dacheux, Nicolas, and Clavier, Nicolas

Subjects
*METALLURGY of thorium, *SOLID solutions synthesis, *SOLID solutions, *RADIOISOTOPES -- Industrial applications, *FUEL cycle, *NUCLEAR fuels, *MATHEMATICAL models
Abstract

Thorium incorporation in the rhabdophane structure as Pr 1-2x Ca x Th x PO 4 ·nH 2 O solid solutions was successfully achieved and resulted in the preparation of a low temperature precursor of the monazite-cheralite type Pr 1-2x Ca x Th x PO 4 . The rhabdophane compounds are considered as potential neoformed phases in case of release of actinides from the phosphate-based ceramic wasteforms envisaged to host radionuclides in the back-end of the nuclear fuel cycle. A multiparametric study was thus undertaken to specify the wet chemistry conditions (starting stoichiometry, temperature, heating time) leading to single phase Pr 1-2x Ca x Th x PO 4 ·nH 2 O powdered samples. The excess of calcium appeared to be a prevailing factor with a suggested initial Ca:Th ratio being equal to 10. Similarly, the recommended heating time should exceed 4 days while the optimal temperature of synthesis is 110 °C. Under these conditions, the stability domain of Pr 1-2x Ca x Th x PO 4 ·nH 2 O ranged from x = 0.00 to x = 0.15. After heating at 1100 °C under air during 6 h, rhabdophane-type samples were fully converted into the highly durable Pr 1-2x Ca x Th x PO 4 cheralite ceramic wasteform. [ABSTRACT FROM AUTHOR]

Published
2017
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