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|Title:||Structural Investigations on an Aged Americium Transmutation Fuel|
|Authors:||WALTER Marcus; SOMERS JOSEPH; FERNANDEZ CARRETERO ASUNCION; HAAS DIDIER; DARDENNE P.; DENECKE M.|
|Citation:||JOURNAL OF NUCLEAR MATERIALS vol. 362 p. 343-349|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Contributions to Conferences|
|Abstract:||Within the EFTTRA-T4 project a MgAl2O4 based inert matrix fuel for 241Am transmutation was produced in 1996. Am L3-edge EXAFS of the annealed material indicate that Am is present as AmAlO3. During 10 years of storage the material accumulated self-irradiation damage and no AmAlO3 X-ray diffraction features can be observed, indicating amorphization of the aged material by the corresponding cumulative a-damage of 2.9 . 1019 g1 AmAlO3. The Am L3-edge EXAFS of the amorphous AmAlO3 shows that structural order is limited to the first oxygen shell around Am, where the rhombohedral splitting in three sub-shells is still present. Evidence for a single Al atom in the next shell is found at an Am–Al distance of 3.28A.|
|JRC Institute:||Institute for Transuranium Elements|
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