Structural investigation on an aged americium transmutation fuel

M. Walter; J. Somers; A. Fernandez; D. Haas; K. Dardenne; M. A. Denecke

doi:10.1016/j.jnucmat.2007.01.082

Structural investigation on an aged americium transmutation fuel

M. Walter, J. Somers, A. Fernandez, D. Haas, K. Dardenne, M. A. Denecke

Dalton Nuclear Institute

Research output: Contribution to journal › Article › peer-review

Abstract

Within the EFTTRA-T4 project a MgAl 2O 4 based inert matrix fuel for 241Am transmutation was produced in 1996. Am L 3-edge EXAFS of the annealed material indicate that Am is present as AmAlO 3. During 10 years of storage the material accumulated self-irradiation damage and no AmAlO 3 X-ray diffraction features can be observed, indicating amorphization of the aged material by the corresponding cumulative α-damage of 2.9 × 10 19 g -1 AmAlO 3. The Am L 3-edge EXAFS of the amorphous AmAlO 3 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 3.28 Å. © 2007 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	343-349
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	362
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jnucmat.2007.01.082
Publication status	Published - 31 May 2007

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Dalton Nuclear Institute

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10.1016/j.jnucmat.2007.01.082

http://www.sciencedirect.com/science/article/pii/S0022311507001444

Cite this

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title = "Structural investigation on an aged americium transmutation fuel",

abstract = "Within the EFTTRA-T4 project a MgAl 2O 4 based inert matrix fuel for 241Am transmutation was produced in 1996. Am L 3-edge EXAFS of the annealed material indicate that Am is present as AmAlO 3. During 10 years of storage the material accumulated self-irradiation damage and no AmAlO 3 X-ray diffraction features can be observed, indicating amorphization of the aged material by the corresponding cumulative α-damage of 2.9 × 10 19 g -1 AmAlO 3. The Am L 3-edge EXAFS of the amorphous AmAlO 3 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 3.28 {\AA}. {\textcopyright} 2007 Elsevier B.V. All rights reserved.",

author = "M. Walter and J. Somers and A. Fernandez and D. Haas and K. Dardenne and Denecke, {M. A.}",

year = "2007",

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doi = "10.1016/j.jnucmat.2007.01.082",

language = "English",

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T1 - Structural investigation on an aged americium transmutation fuel

AU - Walter, M.

AU - Somers, J.

AU - Fernandez, A.

AU - Haas, D.

AU - Dardenne, K.

AU - Denecke, M. A.

PY - 2007/5/31

Y1 - 2007/5/31

N2 - Within the EFTTRA-T4 project a MgAl 2O 4 based inert matrix fuel for 241Am transmutation was produced in 1996. Am L 3-edge EXAFS of the annealed material indicate that Am is present as AmAlO 3. During 10 years of storage the material accumulated self-irradiation damage and no AmAlO 3 X-ray diffraction features can be observed, indicating amorphization of the aged material by the corresponding cumulative α-damage of 2.9 × 10 19 g -1 AmAlO 3. The Am L 3-edge EXAFS of the amorphous AmAlO 3 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 3.28 Å. © 2007 Elsevier B.V. All rights reserved.

AB - Within the EFTTRA-T4 project a MgAl 2O 4 based inert matrix fuel for 241Am transmutation was produced in 1996. Am L 3-edge EXAFS of the annealed material indicate that Am is present as AmAlO 3. During 10 years of storage the material accumulated self-irradiation damage and no AmAlO 3 X-ray diffraction features can be observed, indicating amorphization of the aged material by the corresponding cumulative α-damage of 2.9 × 10 19 g -1 AmAlO 3. The Am L 3-edge EXAFS of the amorphous AmAlO 3 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 3.28 Å. © 2007 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.jnucmat.2007.01.082

DO - 10.1016/j.jnucmat.2007.01.082

M3 - Article

SN - 0022-3115

VL - 362

SP - 343

EP - 349

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 2-3

ER -

Structural investigation on an aged americium transmutation fuel

Abstract

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