Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U

Perron, A.; Turchi, P. E. A.; Landa, A.; Oudot, B.; Ravat, B.; Delaunay, F.

doi:10.1016/j.jnucmat.2016.09.012

Title: Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U

Journal Article · Thu Dec 01 00:00:00 EST 2016 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2016.09.012· OSTI ID:1336994

Perron, A. ^[1]; Turchi, P. E. A. ^[1];

^[1]; Oudot, B. ^[2]; Ravat, B. ^[2]; Delaunay, F. ^[2]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Alternative Energies and Atomic Energy Commission (CEA), Is sur Tille (France)

We present a newly developed self-consistent CALPHAD thermodynamic database involving Al, Am, Ga, Pu, and U. A first optimization of the slightly characterized Am-Al and completely unknown Am-Ga phase diagrams is proposed. To this end, phase diagram features as crystal structures, stoichiometric compounds, solubility limits, and melting temperatures have been studied along the U-Al → Pu-Al → Am-Al, and U-Ga → Pu-Ga → Am-Ga series, and the thermodynamic assessments involving Al and Ga alloying are compared. In addition, two distinct optimizations of the Pu-Al phase diagram are proposed to account for the low temperature and Pu-rich region controversy. We included the previously assessed thermodynamics of the other binary systems (Am-Pu, Am-U, Pu-U, and Al-Ga) in the database and is briefly described in the present work. In conclusion, predictions on phase stability of ternary and quaternary systems of interest are reported to check the consistency of the database.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1336994

Alternate ID(s):: OSTI ID: 1411093

Report Number(s):: LLNL-JRNL-695436

Journal Information:: Journal of Nuclear Materials, Vol. 482, Issue C; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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