Zobrazeno 1 - 10
of 30
pro vyhledávání: '"L. C. Shuller"'
Publikováno v:
Journal of Nuclear Materials. 434:440-450
Density functional theory calculations are used to compare mechanisms of charge-balanced Np 5+ -incorporation into boltwoodite [K(UO 2 )(SiO 3 OH)(H 2 O) 1.5 ]. The charge-balancing mechanisms considered include: (i) H + addition (Np 5+ + H + ↔ U 6
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd1821641bebbb7cf763dd068c0fe6db
https://doi.org/10.1016/j.jnucmat.2011.04.016
https://doi.org/10.1016/j.jnucmat.2011.04.016
Publikováno v:
Journal of Nuclear Materials. 412:13-21
ThxU1−xO2+y binary compositions occur in nature, uranothorianite, and as a mixed oxide nuclear fuel. As a nuclear fuel, important properties, such as the melting point, thermal conductivity, and the thermal expansion coefficient change as a functio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaa4a9e8782f18e2bf5bce4ff98e68c0
https://doi.org/10.1016/j.jnucmat.2011.01.017
https://doi.org/10.1016/j.jnucmat.2011.01.017
Publikováno v:
American Mineralogist. 95:1151-1160
Radionuclide incorporation into the alteration products of corroded UO2 in used nuclear fuel may control the release and mobility of key radionuclides, such as the very long-lived minor actinide, 237Np (τ ½ = 2.1 Ma). Studtite, [UO2(O2)(H2O)2](H2O)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a164f692dbc1b2cdfdd6202079ea0c93
https://doi.org/10.2138/am.2010.3493
https://doi.org/10.2138/am.2010.3493
Autor:
Zhenxian Liu, L. C. Shuller, Veronique Pointeau, Fuxiang Zhang, Wendy R. Panero, D. M. Reaman, Udo Becker, Maik Lang, Rodney C. Ewing, Christophe Poinssot, Jingzhu Hu
Publikováno v:
American Mineralogist. 94:916-920
The compressibility, phase stability, and vibrational properties of coffinite (USiO4) were studied by in situ X-ray diffraction and infrared (IR) measurements at high pressures. An irreversible phase transition from the zircon-type to scheelite-type
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::051ac805fe878e6071555e3a8b570cd5
https://doi.org/10.2138/am.2009.3111
https://doi.org/10.2138/am.2009.3111
Publikováno v:
Journal of Nuclear Materials. 375:290-310
The addition of Th to U-based fuels increases resistance to corrosion due to differences in redox-chemistry and electronic properties between UO2 and ThO2. Quantum-mechanical techniques were used to calculate surface energy trends for ThO2, resulting
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::505dd025c8575f3d02e9974cb7d58fef
https://doi.org/10.1016/j.jnucmat.2007.12.007
https://doi.org/10.1016/j.jnucmat.2007.12.007
Publikováno v:
MRS Proceedings. 1125
Density functional theory and Monte(Carlo methods were used to investigate the solid( solution behavior of actinide dioxides (AcO2). The end(members of interest include: ZrO2, ThO2, UO2, NpO2, and PuO2; all have the isometric fluorite structure. Ab i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f7a9514ee23c4fbbedb0a3527b8d9fb
https://doi.org/10.1557/proc-1125-r10-06
https://doi.org/10.1557/proc-1125-r10-06
Publikováno v:
MRS Proceedings. 1107
Np-237 (τ1/2 = 2.1 million years) is a potentially important contributor to the total dose for a geologic repository under oxidizing conditions. Further, the Np5+-complexes are mobile aqueous species. Several processes may limit the transport of Np,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::199eab44f2b024145a7d0e6f8947db05
https://doi.org/10.1557/proc-1107-455
https://doi.org/10.1557/proc-1107-455
Publikováno v:
MRS Proceedings. 985
Neptunium is a major contributor to the long-term radioactivity in a geologic repository for spent nuclear fuel (SNF) due to its long half-life (2.1 million years). The mobility of Np may be decreased by its incorporation into the U{sup 6+} phases th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7916b8947996993c1dd5a216d97e8277
https://doi.org/10.1557/proc-985-0985-nn12-03
https://doi.org/10.1557/proc-985-0985-nn12-03
Quantum mechanical surface energy calculations have been performed on both uranium dioxide (UO{sub 2}) and thorium dioxide (ThO{sub 2}) (111), (110), and (100) surfaces to determine their relative reactivities. While UO{sub 2} and ThO{sub 2} both hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::880f00c20fa8402365438860a3931834
https://doi.org/10.2172/840135
https://doi.org/10.2172/840135
Publikováno v:
Journal of Applied Physics; 10/7/2022, Vol. 132 Issue 13, p1-14, 14p