Structural investigation on an aged americium transmutation fuel

被引：19

作者：

Walter, M.

Somers, J.

Fernandez, A.

Haas, D.

Dardenne, K.

Denecke, M. A.

机构：

[1] Commiss European Communities, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, Germany

[2] Forschungszentrum Karlsruhe, INE, D-76021 Karlsruhe, Germany

来源：

JOURNAL OF NUCLEAR MATERIALS | 2007年 / 362卷 / 2-3期

关键词：

D O I：

10.1016/j.jnucmat.2007.01.082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Within the EFTTRA-T4 project a MgAl2O4 based inert matrix fuel for Am-241 transmutation was produced in 1996. Am L-3-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 alpha-damage of 2.9 x 10(19) g(-1) 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 Arn-Al distance of 3.28 angstrom. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：343 / 349

页数：7

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